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NCV7420 LIN Transceiver with 3.3 V or 5 V Voltage Regulator
General Description
The NCV7420 is a fully featured local interconnect network (LIN) transceiver designed to interface between a LIN protocol controller and the physical bus. The transceiver is implemented in I3T technology enabling both high-voltage analog circuitry and digital functionality to co-exist on the same chip. The NCV7420 LIN device is a member of the in-vehicle networking (IVN) transceiver family of ON Semiconductor that integrates a LIN v2.0 physical transceiver and either a 3.3 V or a 5 V voltage regulator. It is designed to work in harsh automotive environment and is submitted to the TS16949 qualification flow. The LIN bus is designed to communicate low rate data from control devices such as door locks, mirrors, car seats, and sunroofs at the lowest possible cost. The bus is designed to eliminate as much wiring as possible and is implemented using a single wire in each node. Each node has a slave MCU-state machine that recognizes and translates the instructions specific to that function. The main attraction of the LIN bus is that all the functions are not time critical and usually relate to passenger comfort.
KEY FEATURES LIN-Bus Transceiver http://onsemi.com PIN CONFIGURATION
V BB LIN GND GND WAKE INH OTP_ZAP
1 14
VCC RxD TxD GND STB EN TEST
NCV7420
SOIC 14 D SUFFIX CASE 751AP
2 3 4 5 6 7
13 12 11 10 9 8
ORDERING INFORMATION
See detailed ordering and shipping information in the package dimensions section on page 14 of this data sheet.
* LIN compliant to specification revision 2.0 (backward * * * * *
compatible to version 1.3) and J2602 I3T high voltage technology Bus voltage 45 V Transmission rate up to 20 kBaud SOIC 14 Green package This is a Pb-Free Device*
Voltage Regulator
* * * *
Output voltage 5 V / ~50 mA or 3.3 V / ~50 mA Wake-up input Enable inputs for stand-by and sleep mode INH output for auxiliary purposes (switching of an external pull-up or resistive divider towards battery, control of an external voltage regulator etc.)
Modes
Protection
* Normal mode: LIN communication in either low (up to * * *
10 kBaud) or normal slope Sleep mode: VCC is switched "off" and no communication on LIN bus Stand-by mode: VCC is switched "on" but there is no communication on LIN bus Wake-up bringing the component from sleep mode into standby mode is possible either by LIN command or digital input signal on WAKE pin. Wake-up from LIN bus can also be detected and flagged when the chip is already in standby mode.
* Thermal shutdown * Indefinite short-circuit protection on pins LIN and * Load dump protection (45 V) * Bus pins protected against transients in an automotive *
WAKE towards supply and ground
environment ESD protection level for LIN, INH, WAKE and Vbb up to 8 kV
EMI Compatibility
* Integrated slope control
*For additional information on our Pb-Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D.
(c) Semiconductor Components Industries, LLC, 2009
March, 2009 - Rev. 1
1
Publication Order Number: NCV7420/D
NCV7420
Table 1. KEY TECHNICAL CHARACTERISTICS - 3.3 V version
Symbol Vbb Vbb Ibb_SLP Vcc_out (Note 5) Iout_max Parameter Nominal battery operating voltage Load dump protection (Note 1) Supply current in sleep mode Regulated Vcc output, Vcc load 1 mA-30 mA Regulated Vcc output, Vcc load 0 mA-50 mA Maximum continuous Vcc output current (Note 2) Maximum Vcc output current, thermal shutdown can occur (Note 2) V_wake Operating DC voltage on WAKE pin Maximum rating voltage on WAKE pin Tj Tamb Vesd Junction thermal shutdown temperature Operating ambient temperature Electrostatic discharge voltage (LIN, WAKE, VBB) System HBM (Note 3) Electrostatic discharge voltage (LIN, INH, WAKE, VBB) HBM (Note 4) Electrostatic discharge voltage (other pins) HBM (Note 4) 3.23 3.19 30 50 0 -45 165 -40 -8 -4 -2 Vbb 45 195 +105 +8 +4 +2 3.30 3.30 Min. 5 Typ. 12 Max. 26 45 20 3.37 3.41 Unit V V mA V V mA mA V V C C kV kV kV
Table 2. KEY TECHNICAL CHARACTERISTICS - 5 V version
Symbol Vbb Vbb Ibb_SLP Vcc_out (Note 5) Iout_max Parameter Nominal battery operating voltage Load dump protection (Note 1) Supply current in sleep mode Regulated Vcc output, Vcc load 1 mA-30 mA Regulated Vcc output, Vcc load 0 mA-50 mA Maximum continuous Vcc output current (Note 2) Maximum Vcc output current, thermal shutdown can occur (Note 2) V_wake Operating DC voltage on WAKE pin Maximum rating voltage on WAKE pin Tj Tamb Vesd Junction thermal shutdown temperature Operating ambient temperature Electrostatic discharge voltage (LIN, WAKE, VBB) System HBM (Note 3) Electrostatic discharge voltage (LIN, INH, WAKE, VBB) HBM (Note 4) Electrostatic discharge voltage (other pins) HBM (Note 4) 4.9 4.83 30 50 0 -45 165 -40 -8 -4 -2 Vbb 45 195 +105 +8 +4 +2 5.0 5.0 Min. 6 Typ. 12 Max. 26 45 20 5.1 5.17 Unit V V mA V V mA mA V V C C kV kV kV
1. The applied transients shall be in accordance with ISO 7637 part 1, test pulse 5. The device complies with functional class C; class A can be reached depending on the application and external components. 2. Current limitation is set above 50 mA but thermal shutdown can occur for currents above 30 mA 3. Equivalent to discharging a 150 pF capacitor through a 330 W resistor conform to IEC Standard 1000-4-2. LIN bus filter 220 pF, Vbb blocking capacitor 100 nF, 3k3/10n R/C network on WAKE. 4. Equivalent to discharging a 100 pF capacitor through a 1.5 kW resistor conform to MIL STD 883 method 3015.7. 5. Vcc voltage must be properly stabilized by external capacitors: capacitor of min. 80 nF with ESR<10 mW in parallel with a capacitor of min. 8 mF, ESR<1W.
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NCV7420
VCC OTP_ZAP
V- reg
VCC
VBB
INH
Osc
Band- gap
STB WAKE EN
VBB
State & Wake- up Control
Thermal shutdown
RxD
VCC
COMP
Filter
LIN
TxD
time- out
VBB VCC
Slope Control
TEST
POR
NCV7420 GND
Figure 1. Block Diagram
Typical Application
Application Schematic
The EMC immunity of the Master-mode device can be further enhanced by adding a capacitor between the LIN output and ground. The optimum value of this capacitor is determined by the length and capacitance of the LIN bus, the
Master Node 10 uF 100nF V CC
14 13 12 9
number and capacitance of Slave devices, the pull-up resistance of all devices (Master & Slave), and the required time constant of the system, respectively. Vcc voltage must be properly stabilized by external capacitors: capacitor of min. 80 nF (ESR < 10 mW) in parallel with a capacitor of min. 8 mF (ESR < 1 W).
VBAT
10 uF 100nF INH V BB
VBAT
10 uF 100nF V BB
10 uF 100nF V CC
14 13 12 9
Slave Node
V CC RxD TxD EN STB GND
11 1
VCC RxD TxD EN STB GND
NCV7420
LIN
1 nF
WAKE 10nF WAKE GND
5
GND
10nF
10 7 3 4 11 8
WAKE GND
220pF
LIN 2
Micro controller
NCV7420
1 kW
11 1
LIN
LIN 2
Micro controller
5
WAKE
10 7 3 4 11 8
GND
KL30 LIN- BUS KL31
Figure 2. Typical Application Diagram
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NCV7420
Table 3. PIN DESCRIPTION
Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Name VBB LIN GND GND WAKE INH OTP_ZAP TEST EN STB GND TxD RxD Vcc Battery supply input LIN bus output/input Ground Ground High voltage digital input pin to switch the part from sleep- to standby mode Inhibit output Supply for programming of trimming bits at factory testing, should be grounded in the application Digital input for factory testing, should be grounded in the application Enable input, transceiver in normal operation mode when high Standby mode control input Ground Transmit data input, low in dominant state Receive data output; low in dominant state; push-pull output Supply voltage (output) Description
Overall Functional Description
LIN is a serial communication protocol that efficiently supports the control of mechatronic nodes in distributed automotive applications. The domain is class-A multiplex buses with a single master node and a set of slave nodes. NCV7420 is designed as a master or slave node for the LIN communication interface with an integrated 3.3 V or 5 V voltage regulator having a current capability up to 50 mA for supplying any external components (microcontroller). NCV7420 contains the LIN transmitter, LIN receiver, voltage regulator, power-on-reset (POR) circuits and thermal shutdown (TSD). The LIN transmitter is optimised for the maximum specified transmission speed of 20 kBaud
with EMC performance due to reduced slew rate of the LIN output. The junction temperature is monitored via a thermal shutdown circuit that switches the LIN transmitter and voltage regulator off when temperature exceeds the TSD trigger level. NCV7420 has four operating states (normal mode, low slope mode, stand-by mode, and sleep mode) that are determined by the input signals EN, WAKE, STB, and TxD.
Operating States
NCV7420 provides four operating states, two modes for normal operation with communication, one stand-by without communication and one low power mode with very low current consumption. See Figure 3.
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NCV7420
Stand- mode by Normal mode (normal slope)
Power up Vbb
- - - - -
Vcc: "on" LIN TX: "off" INH: "floating" Term: "current source" " RxD: high/low
EN goes from 0 to 1 while TxD = 1 - - - - -
EN goes from 1 to 0 while STB = 1
Vcc: "on" LIN TX: "on" INH: "high"/"floating" Term: 30k W RxD: LIN data
EN goes from 0 to 1 while TxD = 0
EN goes from 1 to 0 while STB = 1
Local wake- up or LIN wake- up
- - - - -
Normal mode (low slope)
EN goes from 1 to 0 while STB = 0
Vcc: "on" LIN TX: "on" INH: "high"/"floating" Term: 30k W RxD: LIN data
Figure 3. State Diagram Table 4. MODE SELECTION
Mode Normal - Slope Normal - Low Slope Stand-by Sleep Vcc ON ON ON OFF RxD Low = Dominant State High = Recessive State Low = Dominant State High = Recessive State Low after LIN wakeup, high otherwise Clamped to Vcc INH High if STB=High during state transition; Floating otherwise High if STB=High during state transition; Floating otherwise Floating Floating LIN Normal Slope Low Slope OFF OFF 30 kW on LIN ON ON OFF OFF Note (Note 6) (Note 7) (Note 8)
6. The normal slope mode is entered when pin EN goes HIGH while TxD is in HIGH state during EN transition. 7. The low slope mode is entered when pin EN goes HIGH while TxD is in LOW state during EN transition. LIN transmitter gets on only after TxD returns to high after the state transition. 8. The stand-by mode is entered automatically after power-up.
Normal Slope Mode
In normal slope mode the transceiver can transmit and receive data via LIN bus with speed up to 20 kBaud. The transmit data stream of the LIN protocol is present on the TxD pin and converted by the transmitter into a LIN bus signal with controlled slew rate to minimize EMC emission. The receiver consists of the comparator that has a threshold with hysteresis in respect to the supply voltage and an input filter to remove bus noise. The LIN output is pulled HIGH via an internal 30 kW pull-up resistor. For master applications it is needed to put an external 1 kW resistor with a serial diode between LIN and Vbb (or INH). See Figure 2. The mode selection is done by EN=HIGH when TxD pin is HIGH. If STB pin is high during the standby-to-normal slope mode transition, INH pin is pulled high. Otherwise, it stays floating.
Low Slope Mode
are longer). This further reduces the EMC emission. As a consequence the maximum speed on the LIN bus is reduced up to 10 kBaud. This mode is suited for applications where the communication speed is not critical. The mode selection is done by EN=HIGH when TxD pin is LOW. In order not to transmit immediately a dominant state on the bus (because TxD=LOW), the LIN transmitter is enabled only after TxD returns to HIGH. If STB pin is high during the standby-to-low slope mode transition, INH pin is pulled high. Otherwise, it stays floating.
Stand-by Mode
In low slope mode the slew rate of the signal on the LIN bus is reduced (rising and falling edges of the LIN bus signal
The stand-by mode is always entered after power-up of the NCV7420. It can also be entered from normal mode when the EN pin is low and the stand-by pin is high. From sleep mode it can be entered after a local wake-up or LIN wakeup. In stand-by mode the Vcc voltage regulator for supplying external components (e.g. a microcontroller) stays active. Also the LIN receiver stays active to be able to detect a remote wake-up via bus. The LIN transmitter is
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EN goes from 1 to 0 while STB = 0 - - - - - Vcc: "off" LIN TX: "off" INH: "floating" Term: "current source" RxD: =VCC
Sleep mode
NCV7420
disabled and the slave internal termination resistor of 30 kW between LIN and Vbb is disconnected in order to minimize current consumption. Only a pull-up current source between Vbb and LIN is active.
Sleep Mode Wake-up
The Sleep Mode provides extreme low current consumption. This mode is entered when both EN and STB pins are LOW coming from normal mode. The internal termination resistor of 30 kW between LIN and Vbb is disconnected and also the Vcc regulator is switched off to minimize current consumption.
NCV7420 has two possibilities to wake-up from sleep or stand-by mode (see Figure 3): * Local wake-up: enables the transition from sleep mode to stand-by mode * Remote wake-up via LIN: enables the transition from sleep- to stand-by mode and can be also detected when already in standby mode. A local wake-up is only detected in sleep mode if a transition from LOW to HIGH or from HIGH to LOW is seen on the wake pin.
Wake
VBB
Detection of Local Wake-Up
Wake
VBB
Detection of Local Wake-Up
50% VBB typ.
50% VBB typ.
Sleep Mode
Stand-by Mode
t
Sleep Mode
Stand-by Mode
t
Figure 4. Local Wake-up Signal
A remote wake-up is only detected if a combination of (1) a falling edge at the LIN pin (transition from recessive to dominant) is followed by (2) a dominant level maintained
for a time period > tWAKE and (3) again a rising edge at pin LIN (transition from dominant to recessive) happens.
LIN
Detection of Remote Wake-Up VBB tWAKE 40% Vbb LIN dominant level Sleep Mode Stand-by Mode 60% Vbb LIN recessive level
t
Figure 5. Remote Wake-up Behavior
The wake-up source is distinguished by pin RxD in the stand-by mode: * RxD remains HIGH after power-up or local wake-up.
* RxD is kept LOW until normal mode is entered after a
remote wake-up (LIN).
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NCV7420
Electrical Characteristics
Definitions
All voltages are referenced to GND (Pin 13). Positive currents flow into the IC.
Table 5. ABSOLUTE MAXIMUM RATINGS - 3.3 V and 5 V versions
Symbol Vbb Vcc I_Vcc V_LIN V_INH V_WAKE V_Dig_in Tjunc Vesd Battery voltage on pin Vbb (Note 9) DC voltage on pin Vcc Current delivered by the Vcc regulator LIN bus voltage (Note 10) DC voltage on inhibit pin DC voltage on WAKE pin DC input voltage on pins TxD, RxD, EN, STB Maximum junction temperature Electrostatic discharge voltage (pins LIN, WAKE and Vbb) system HBM (Note 11) Electrostatic discharge voltage (pins LIN, INH, WAKE and Vbb) HBM (Note 12) Electrostatic discharge voltage (other pins) HBM (Note 12) Electrostatic discharge voltage; charge device model (Note 13) Parameter Min. -0.3 0 50 -45 -0.3 -45 -0.3 -40 -8 -4 -2.0 -250 +45 Vbb + 0.3 45 Vcc + 0.3 +165 +8 +4 +2.0 +250 Max. +45 +7 Unit V V mA V V V V C kV kV kV V
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. 9. The applied transients shall be in accordance with ISO 7637 part 1, test pulses 1, 2, 3a, 3b, and 5. The device complies with functional class C; class A can be reached depending on the application and external components. 10. The applied transients shall be in accordance with ISO 7637 part 1, test pulses 1, 2, 3a, and 3b. The device complies with functional class C; class A can be reached depending on the application and external components. 11. Equivalent to discharging a 150 pF capacitor through a 330 W resistor conform to IEC Standard 1000-4-2. LIN bus filter 220 pF, Vbb blocking capacitor 100 nF, 3k3/10n R/C network on WAKE. 12. Equivalent to discharging a 100 pF capacitor through a 1.5 kW resistor conform to MIL STD 883 method 3015.7. 13. Conform to EOS/ESD-DS5.3 (socket mode).
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NCV7420
DC Characteristics - 3.3 V version (VBB = 5 V to 26 V; Tjunc = -40C to +150C; unless otherwise specified.)
Table 6. DC CHARACTERISTICS SUPPLY - Pins VBB and VCC
Symbol Ibb_ON Ibb_STB Ibb_SLP Vcc_out Supply current Supply current Supply current Regulator output voltage Regulator output voltage Iout_max_cont Iout_max_conta Iout_max_abs Iout_lim Maximum output current Maximum output current Absolute maximum output current Over-current limitation Parameter Conditions Normal mode; LIN recessive Stand-by mode, Vbb = 5 - 18 V Sleep mode, Vbb = 5 - 18 V Vcc load 1 mA - 30 mA Vcc load 0 mA - 50 mA Vbb = 16 V; Tamb = 105C Vbb = 26 V; limited lifetime Thermal shutdown can occur 50 3.23 3.19 3.30 3.30 Min. Typ. Max. 1 60 20 3.37 3.41 30 30 50 150 Unit mA mA mA V V mA mA mA mA
Table 7. DC CHARACTERISTICS LIN TRANSMITTER - Pin LIN
Symbol VLin_dom_LoSup VLin_dom_HiSup VLin_rec ILIN_lim Rslave ILIN_off_dom ILIN_off_rec ILIN_no_GND ILIN_no_Vbb Parameter LIN dominant output voltage LIN dominant output voltage LIN recessive output voltage Short circuit current limitation Internal pull-up resistance LIN output current bus in dominant state LIN output current bus in recessive state Communication not affected LIN bus remains operational Driver off; Vbb = 12 V Driver off; Vbb = 12 V Vbb = GND = 12 V; 0 < VLin < 18 V Vbb = GND = 0 V; 0 < VLin < 18 V -1 Conditions TXD = low; Vbb = 7.3 V TXD = low; Vbb = 18 V TXD = highH; Ilin = 0 mA VLin = Vbb_max Vbb - V (Note 14) 40 20 -1 20 1 100 33 200 47 Min. Typ. Max. 1.2 2.0 Unit V V V mA kW mA mA mA mA
Table 8. DC CHARACTERISTICS LIN RECEIVER - Pin LIN
Symbol Vrec_dom Vrec_rec Vrec_cnt Vrec_hys Parameter Receiver threshold Receiver threshold Receiver centre voltage Receiver hysteresis Conditions LIN bus recessive dominant LIN bus dominant recessive (Vbus_dom + Vbus_rec) /2 Min. 0.4 0.4 0.475 0.05 Typ. Max. 0.6 0.6 0.525 0.175 Unit Vbb Vbb Vbb Vbb
Table 9. DC CHARACTERISTICS I/Os
Symbol Pin WAKE V_wake_th Threshold voltage 0.35 0.65 Vbb Parameter Conditions Min. Typ. Max. Unit
14. V is the forward diode voltage. Typically (over the complete temperature) V = 1 V. 15. By one of the trimming bits, following reconfiguration can be done during chip-level testing in order to fit the NCV7420_3 into different interface: pins TxD and EN will have typ. 10 kW pull-down resistor to ground and pin WAKE will have typ. 10 mA pull-up current source.
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NCV7420
DC Characteristics - 3.3 V version (VBB = 5 V to 26 V; Tjunc = -40C to +150C; unless otherwise specified.)
Table 9. DC CHARACTERISTICS I/Os
Symbol Pin WAKE I_leak T_wake_min Pins TxD and STB Vil Vih Rpu Pin INH Delta_VH I_leak Pin EN Vil Vih Rpd Pin RxD Vol Voh Low level output voltage High level output voltage Isink = 2 mA Isource = -2 mA Vcc - 0.65 V 0.65 V V Low level input voltage High level input voltage Pull-down resistance to ground (Note 15) 2.0 50 200 0.8 V V kW High level voltage drop Leakage current IINH = 15 mA Sleep mode; VINH = 0 V -1 0.35 0.75 1 V mA Low level input voltage High level input voltage Pull-up resistance to Vcc (Note 15) 2.0 50 200 0.8 V V kW Input leakage current (Note 15) Debounce time Vwake = 0 V; Vbb = 18 V Sleep mode; rising and falling edge -1 8 -0.5 1 54 mA ms Parameter Conditions Min. Typ. Max. Unit
Table 10. DC CHARACTERISTICS
Symbol POR PORH_Vbb PORL_Vbb POR_Vbb_sl PORH_Vcc PORL_Vcc POR_Vcc_hyst TSD Tj Tj_hyst Junction temperature Thermal shutdown hysteresis For shutdown 165 9 195 18 C C POR high level Vbb comparator POR low level Vbb comparator Maximum slope on Vbb to guarantee POR POR high level Vcc comparator POR low level Vcc comparator Hysteresis of POR level Vcc comparator 2 100 3 50 3 4.75 V V V/ms V V mV Parameter Conditions Min. Typ. Max. Unit
14. V is the forward diode voltage. Typically (over the complete temperature) V = 1 V. 15. By one of the trimming bits, following reconfiguration can be done during chip-level testing in order to fit the NCV7420_3 into different interface: pins TxD and EN will have typ. 10 kW pull-down resistor to ground and pin WAKE will have typ. 10 mA pull-up current source.
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NCV7420
DC Characteristics - 5 V version - (VBB = 6 V to 26 V; Tjunc = -40C to +150C; unless otherwise specified.)
Table 11. DC CHARACTERISTICS SUPPLY - Pins VBB and VCC
Symbol Ibb_ON Ibb_STB Ibb_SLP Vcc_out Parameter Supply current Supply current Supply current Regulator output voltage Regulator output voltage Iout_max_cont Iout_max_conta Iout_max_abs Iout_lim Maximum output current Maximum output current Absolute maximum output current Over-current limitation Conditions Normal mode; LIN recessive Stand-by mode, Vbb = 6 - 18 V Sleep mode, Vbb = 6 - 18 V Vcc load 1 mA - 30 mA Vcc load 0 mA - 50 mA Vbb = 16 V; Tamb = 105C Vbb = 26 V; limited lifetime Thermal shutdown can occur 50 4.9 4.83 5.0 5.0 Min. Typ. Max. 1 60 20 5.1 5.17 30 30 50 150 Unit mA mA mA V V mA mA mA mA
Table 12. DC CHARACTERISTICS LIN TRANSMITTER - Pin LIN
Symbol VLin_dom_LoSup VLin_dom_HiSup VLin_rec ILIN_lim Rslave ILIN_off_dom ILIN_off_rec ILIN_no_GND ILIN_no_Vbb Parameter LIN dominant output voltage LIN dominant output voltage LIN recessive output voltage Short circuit current limitation Internal pull-up resistance LIN output current bus in dominant state LIN output current bus in recessive state Communication not affected LIN bus remains operational Driver off; Vbb = 12 V Driver off; Vbb = 12 V Vbb = GND = 12 V; 0 < VLin < 18 V Vbb = GND = 0 V; 0 < VLin < 18 V -1 Conditions TXD = low; Vbb = 7.3 V TXD = low; Vbb = 18 V TXD = highH; Ilin = 0 mA VLin = Vbb_max Vbb - V (Note 16) 40 20 -1 20 1 100 33 200 47 Min. Typ. Max. 1.2 2.0 Unit V V V mA kW mA mA mA mA
Table 13. DC CHARACTERISTICS LIN RECEIVER - Pin LIN
Symbol Vrec_dom Vrec_rec Vrec_cnt Vrec_hys Parameter Receiver threshold Receiver threshold Receiver center voltage Receiver hysteresis Conditions LIN bus recessive dominant LIN bus dominant recessive (Vbus_dom + Vbus_rec) /2 Min. 0.4 0.4 0.475 0.05 Typ. Max. 0.6 0.6 0.525 0.175 Unit Vbb Vbb Vbb Vbb
Table 14. DC CHARACTERISTICS I/OS
Symbol Pin WAKE V_wake_th Threshold voltage 0.35 0.65 Vbb Parameter Conditions Min. Typ. Max. Unit
16. V is the forward diode voltage. Typically (over the complete temperature) V = 1 V. 17. By one of the trimming bits, following reconfiguration can be done during chip-level testing in order to fit the NCV7420_5 into different interface: pins TxD and EN will have typ. 10 kW pull-down resistor to ground and pin WAKE will have typ. 10 mA pull-up current source.
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NCV7420
DC Characteristics - 5 V version - (VBB = 6 V to 26 V; Tjunc = -40C to +150C; unless otherwise specified.)
Table 14. DC CHARACTERISTICS I/OS
Symbol Pin WAKE I_leak T_wake_min Pins TxD and STB Vil Vih Rpu Pin INH Delta_VH I_leak Pin EN Vil Vih Rpd Pin RxD Vol Voh Low level output voltage High level output voltage Isink = 2 mA Isource = -2 mA Vcc - 0.65 V 0.65 V V Low level input voltage High level input voltage Pull-down resistance to ground (Note 17) 2.0 50 200 0.8 V V kW High level voltage drop Leakage current IINH = 15 mA Sleep mode; VINH = 0 V -1 0.35 0.75 1 V mA Low level input voltage High level input voltage Pull-up resistance to Vcc (Note 17) 2.0 50 200 0.8 V V kW Input leakage current (Note 17) Debounce time Vwake = 0 V; Vbb = 18 V Sleep mode; rising and falling edge -1 8 -0.5 1 54 mA ms Parameter Conditions Min. Typ. Max. Unit
Table 15. DC CHARACTERISTICS
Symbol POR PORH_Vbb PORL_Vbb POR_Vbb_sl PORH_Vcc PORL_Vcc POR_Vcc_hyst TSD Tj Tj_hyst Junction temperature Thermal shutdown hysteresis For shutdown 165 9 195 18 C C POR high level Vbb comparator POR low level Vbb comparator Maximum slope on Vbb to guarantee POR POR high level Vcc comparator POR low level Vcc comparator Hysteresis of POR level Vcc comparator 3 100 3 50 4.5 4.75 V V V/ms V V mV Parameter Conditions Min. Typ. Max. Unit
16. V is the forward diode voltage. Typically (over the complete temperature) V = 1 V. 17. By one of the trimming bits, following reconfiguration can be done during chip-level testing in order to fit the NCV7420_5 into different interface: pins TxD and EN will have typ. 10 kW pull-down resistor to ground and pin WAKE will have typ. 10 mA pull-up current source.
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NCV7420
AC Characteristics - 3.3 V and 5 V versions - (VBB = 7 V to 18 V; Tjunc = -40C to +150C; unless otherwise specified.)
Table 16. AC CHARACTERISTICS LIN TRANSMITTER - Pin LIN
Symbol D1 Parameter Duty Cycle 1 = tBUS_REC(min) / (2 x TBit) Conditions THREC(min) = 0.284 x Vbb THDOM(min) = 0.422 x Vbb TBIT = 50 ms THREC(max) = 0.744 x Vbb THDOM(max) = 0.581 x Vbb TBIT = 50 ms Normal slope mode; Vbb = 12 V; L1, L2 (Note 18) Normal slope mode; Vbb = 12 V; L1, L2 (Note 18) Normal slope mode; Vbb = 12 V; L1, L2 (Note 18) Normal slope mode; Vbb = 12 V; L3 (Note 18) Normal slope mode; Vbb = 12 V; L3 (Note 18) Normal slope mode; Vbb = 12 V; L3 (Note 18) Low slope mode (Note 19); Vbb = 12 V; L3 (Note 18) Low slope mode (Note 19); Vbb = 12 V; L3 (Note 18) 30 TxD = low 6 -5 -4 Min. 0.396 Typ. Max. Unit
D2
Duty Cycle 2 = tBUS_REC(max) / (2 x TBit)
0.581
T_fall_norm
LIN falling edge
22.5
ms
T_rise_norm
LIN rising edge
22.5
ms
T_sym_norm
LIN slope symmetry
4
ms
T_fall_norm T_rise_norm T_sym_norm T_fall_low T_rise_low T_wake T_dom
LIN falling edge LIN rising edge LIN slope symmetry LIN falling edge LIN rising edge Dominant time-out for wake-up via LIN bus TxD dominant time-out
27 27 5 62 62 150 20
ms ms ms ms ms ms ms
18. The AC parameters are specified for following RC loads on the LIN bus: L1 = 1 kW / 1 nF; L2 = 660 W / 6.8 nF; L3 = 500 W / 10 nF. 19. Low slope mode is not compliant to the LIN 1.3 or LIN 2.0 standard.
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NCV7420
TxD
tBIT 50% tBIT
t LIN
THRec(max) THDom(max) THRec(min) THDom(min) tBUS_dom(max) tBUS_rec(min)
Thresholds of receiving node 1 Thresholds of receiving node 2
t
tBUS_dom(min) tBUS_rec(max)
Figure 6. LIN Transmitter Duty Cycle
LIN
100%
60% 40%
60% 40%
0% T_fall T_rise
t
Figure 7. LIN Transmitter Rising and Falling Times
Table 17. AC CHARACTERISTICS LIN RECEIVER
Symbol Pin LIN Trec_prop_down Trec_prop_up Trec_sym Parameter Propagation delay of receiver falling edge Propagation delay of receiver rising edge Propagation delay symmetry Trec_prop_down - Trec_prop_up Conditions Min. 0.1 0.1 -2 Typ. Max. 6 6 2 Unit ms ms ms
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NCV7420
LIN
Vbb 60% Vbb 40% Vbb
t RxD
trec_prop_down trec_prop_up 50%
t
Figure 8. LIN Receiver Timing ORDERING INFORMATION
Container Part Number NCV7420D23G NCV7420D23R2G NCV7420D25G NCV7420D25R2G Description LIN Transceiver + 3.3 V Vreg. LIN Transceiver + 3.3 V Vreg. LIN Transceiver + 5 V Vreg. LIN Transceiver + 5 V Vreg. Package SOIC 150 14 GREEN (JEDEC MS-012) SOIC 150 14 GREEN (JEDEC MS-012) SOIC 150 14 GREEN (JEDEC MS-012) SOIC 150 14 GREEN (JEDEC MS-012) Shipping Tube/Rail Tape & Reel Tube/Rail Tape & Reel Qty. 55 3000 55 3000 Temperature Range -40C to 105C -40C to 105C -40C to 105C -40C to 105C
For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D.
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NCV7420
PACKAGE DIMENSIONS
SOIC 14 CASE 751AP-01 ISSUE A
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NCV7420
ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. "Typical" parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada Email: orderlit@onsemi.com N. American Technical Support: 800-282-9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81-3-5773-3850 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative
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NCV7420/D

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