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IDT54/74FCT623T/AT/CT FAST CMOS OCTAL BUS TRANSCEIVERS (3-STATE)
FAST CMOS OCTAL BUS TRANSCEIVERS (3-STATE)
Integrated Device Technology, Inc.
IDT54/74FCT623T/AT/CT
FEATURES:
* * * * Std., A and C speed grades Low input and output leakage 1A (max.) CMOS power levels True TTL input and output compatibility - VOH = 3.3V (typ.) - VOL = 0.3V (typ.) High drive outputs (-15mA IOH, 64mA IOL) Power off disable outputs permit "live insertion" Meets or exceeds JEDEC standard 18 specifications Product available in Radiation Tolerant and Radiation Enhanced versions Military product compliant to MIL-STD-883, Class B and DESC listed (dual marked) Available in DIP, SOIC, CERPACK and LCC packages
DESCRIPTION
The FCT623T/AT/CT is a non-inverting octal transceiver with 3-state bus-driving outputs in both the send and receive directions. The B bus outputs are capable of sinking 64mA and sourcing up to 15mA, providing very good capacitive drive characteristics. These octal bus transceivers are designed for asynchronous two-way communication between data buses. The control function implementation allows for maximum flexibility in timing. One important feature of the FCT623T/AT/CT is the Power Down Disable capability. When the GAB and GBA inputs are conditioned to put the device in high-Z state, the I/O ports will maintain high impedance during power supply ramps and when VCC = 0V. This is a desirable feature in back-plane applications where it may be necessary to perform "live" insertion and removal of cards for on-line maintenance. It is also a benefit in systems with multiple redundancy where one or more redundant cards may be powered-off.
* * * * * *
FUNCTIONAL BLOCK DIAGRAM
GBA
GAB
A1
B1
A2 - A8
B2 - B8
7 other transceivers
2563 drw 01
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
(c)1996 Integrated Device Technology, Inc.
NOVEMBER 1995
DSC-2563/5
6.19 6.19
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1
IDT54/74FCT623T/AT/CT FAST CMOS OCTAL BUS TRANSCEIVERS (3-STATE)
MILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN CONFIGURATIONS
GAB
1 GAB A1 A2 A3 A4 A5 A6 A7 A8 GND 2 3 4 5 6 7 8 9 10 P20-1 D20-1 SO20-2 & E20-1 19 18 17 16 15 14 13 12 11 GBA B1 B2 B3 B4 B5 B6 B7 B8
2563 drw 02
A2
3 A3 A4 A5 A6 A7 4 5 6 7 8
A1
1
20
VCC
2
20 19 18 17 16 15 14
GBA
VCC
INDEX
B1 B2 B3 B4 B5
L20-2
9 10 11 12 13
GND
B8 B7
A8
B6
DIP/SOIC/CERPACK TOP VIEW
2563 drw 03
LCC TOP VIEW
DEFINITION OF FUNCTIONAL TERMS
Pin Names GBA, GAB A1 - A8 B1 - B8 Description Enable Inputs A Bus Inputs or 3-State Outputs B Bus Inputs or 3-State Outputs
2563 tbl 01
ABSOLUTE MAXIMUM RATINGS(1)
Symbol Rating Commercial VTERM(2) Terminal Voltage -0.5 to +7.0 with Respect to GND VTERM(3) Terminal Voltage -0.5 to with Respect to VCC +0.5 GND TA Operating 0 to +70 Temperature TBIAS Temperature -55 to +125 Under Bias TSTG Storage -55 to +125 Temperature PT Power Dissipation 0.5 IOUT DC Output Current -60 to +120 Military -0.5 to +7.0 Unit V
-0.5 to VCC +0.5 -55 to +125 -65 to +135 -65 to +150 0.5 -60 to +120
V
FUNCTION TABLE(1)
C C C
W mA
GBA
L H H L
Enable Inputs GAB L H L H Outputs B data to A bus A data to B bus Z B data to A bus A data to B bus
2563 tbl 02
NOTES: 1. H = HIGH Voltage Level 2. L = LOW Volage Level 3. Z = High-Impedance (OFF) state
2563 lnk 03 NOTES: 1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. No terminal voltage may exceed VCC by +0.5V unless otherwise noted. 2. Input and VCC terminals only. 3. Outputs and I/O terminals only.
CAPACITANCE (TA = +25C, f = 1.0MHz)
Symbol Parameter(1) CIN Input Capacitance COUT Output Capacitance Conditions VIN = 0V VOUT = 0V Typ. 6 8 Max. Unit 10 pF 12
pF
2563 lnk 04 NOTE: 1. This parameter is measured at characterization but not tested.
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IDT54/74FCT623T/AT/CT FAST CMOS OCTAL BUS TRANSCEIVERS (3-STATE)
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: Commercial: TA = 0C to +70C, VCC = 5.0V 5%; Military: TA = -55C to +125C, VCC = 5.0V 10%
Symbol VIH VIL II H II L II VIK IOS VOH Parameter Input HIGH Level Input LOW Level Input HIGH Input HIGH Current (5) Current (5) Input LOW Current (5) Clamp Diode Voltage Short Circuit Current Output HIGH Voltage (A and B Bus) Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max., VI = 2.7V VCC = Max., VI = 0.5V VCC = Max., VI = VCC (Max.) VCC = Min., IN = -18mA VCC = Max.(3) , VO = GND IOH = -6mA MIL. IOH = -8mA COM'L. IOH = -12mA MIL. IOH = -15mA COM'L. VCC = Min. IOL = 32mA MIL. (4) VIN = VIH or VIL IOL = 48mA COM'L. VCC = Min. IOL = 48mA MIL. (4) VIN = VIH or VIL IOL = 64mA COM'L. VCC = 0V, VIN or VO 4.5V
--
Min. 2.0 -- -- -- -- -- -60 2.4 2.0 -- -- -- -- --
Typ.(2) -- -- -- -- -- -0.7 -120 3.3 3.0 0.3 0.3 -- 200 0.01
Max. -- 0.8 1 1 1 -1.2 -225 -- -- 0.5 0.55 1 -- 1
Unit V V A A A V mA V V V V A mV A
VCC = Min. VIN = VIH or VIL
VOL VOL IOFF VH ICC
Output LOW Voltage (A Bus) Output LOW Voltage (B Bus) Input/Output Power Off Leakage(6) Input Hysteresis Quiescent Power Supply Current
VCC = Max., VIN = GND or VCC
NOTES: 2563 tbl 05 1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 5.0V, +25C ambient. 3. Not more than one output should be shorted at one time. Duration of the short circuit test should not exceed one second. 4. These are maximum IOL values per output, for 8 outputs turned on simultaneously. Total maximum IOL (all outputs) is 512mA for commercial and 384mA for military. Derate IOL for number of outputs exceeding 8 turned on simultaneously. 5. The test limit for this parameter is 5A at TA = -55C. 6. This parameter is guaranteed but not tested.
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IDT54/74FCT623T/AT/CT FAST CMOS OCTAL BUS TRANSCEIVERS (3-STATE)
MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS
Symbol
ICC ICCD
Parameter Quiescent Power Supply Current TTL Inputs HIGH Dynamic Power Supply Current(4)
Test Conditions(1) VCC = Max. VIN = 3.4V(3) VCC = Max. Outputs Open GBA = GAB = GND One Input Toggling 50% Duty Cycle VCC = Max. Outputs Open fi = 10MHz 50% Duty Cycle GBA = GAB = GND One Bit Toggling VCC = Max. Outputs Open fi = 2.5MHz 50% Duty Cycle GBA = GAB = GND Eight Bits Toggling
Min. --
Typ.(2) 0.5 0.15
Max. 2.0 0.25
Unit mA mA/ MHz
VIN = VCC VIN = GND
--
IC
Total Power Supply Current (6)
VIN = VCC VIN = GND VIN = 3.4V VIN = GND VIN = VCC VIN = GND VIN = 3.4V VIN = GND
--
1.5
3.5
mA
--
1.8
4.5
--
3.0
6.0 (5)
--
5.0
14.0 (5)
NOTES: 1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 5.0V, +25C ambient. 3. Per TTL driven input (VIN = 3.4V). All other inputs at VCC or GND. 4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations. 5. Values for these conditions are examples of the ICC formula. These limits are guaranteed but not tested. 6. IC = IQUIESCENT + IINPUTS + IDYNAMIC IC = ICC + ICC DHNT + ICCD (fCP/2 + fiNi) ICC = Quiescent Current ICC = Power Supply Current for a TTL High Input (VIN = 3.4V) DH = Duty Cycle for TTL Inputs High NT = Number of TTL Inputs at DH ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL) fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices) fi = Input Frequency Ni = Number of Inputs at fi All currents are in milliamps and all frequencies are in megahertz.
2563 tbl 07
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
54/74FCT623T Com'l. Symbol Parameter Condition(1) Mil. 54/74FCT623AT Com'l. Mil. 54/74FCT623CT Com'l. Mil.
Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Unit
tPLH tPHL tPLH tPHL tPZH tPZL tPHZ tPLZ tPZH tPZL tPHZ tPLZ
Propagation Delay An to Bn Propagation Delay Bn to An Output Enable Time GBA to An Output Disable Time GBA to An Output Enable Time GAB to Bn Output Disable Time GAB to Bn
CL = 50pF RL = 500
1.5 1.5 1.5 1.5 1.5 1.5
7.5 7.5 9.0 8.0 9.0 8.0
1.5 1.5
9.0 9.5
1.5 1.5 1.5 1.5 1.5 1.5
5.5 5.5 7.0 6.5 7.0 6.5
1.5 1.5 1.5 1.5 1.5 1.5
6.3 6.3 8.0 7.4 8.0 7.4
1.5 1.5 1.5 1.5 1.5 1.5
4.8 4.8 6.1 5.6 6.1 5.6
1.5 1.5 1.5 1.5 1.5 1.5
5.4 5.4 6.9 6.4 6.9 6.4
ns ns ns ns ns ns
1.5 10.0 1.5 9.0
1.5 10.5 1.5 9.0
NOTES: 1. See test circuit and waveforms. 2. Minimum limits are guaranteed but not tested on Propagation Delays
2563 tbl 07
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IDT54/74FCT623T/AT/CT FAST CMOS OCTAL BUS TRANSCEIVERS (3-STATE)
TEST CIRCUITS AND WAVEFORMS TEST CIRCUITS FOR ALL OUTPUTS
V CC 500 VIN Pulse Generator RT D.U.T. 50pF CL
2563 drw 05
SWITCH POSITION
Test
7.0V
Switch
Open Drain Disable Low Enable Low All Other Tests
Closed
VOUT
Open
500
2563 lnk 09 DEFINITIONS: CL= Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.
SET-UP, HOLD AND RELEASE TIMES
PULSE WIDTH
DATA INPUT TIMING INPUT ASYNCHRONOUS CONTROL PRESET CLEAR ETC. SYNCHRONOUS CONTROL PRESET CLEAR CLOCK ENABLE ETC. tSU
tH
3V 1.5V 0V 3V 1.5V 0V 3V 1.5V 0V 3V 1.5V 0V
2563 drw 06
LOW-HIGH-LOW PULSE tW HIGH-LOW-HIGH PULSE
1.5V
tREM
1.5V
2563 drw 07
tSU
tH
PROPAGATION DELAY
ENABLE AND DISABLE TIMES
ENABLE DISABLE 3V 1.5V 0V 3.5V 0.3V tPHZ 0.3V 1.5V 0V VOH 0V
2563 drw 09
SAME PHASE INPUT TRANSITION tPLH OUTPUT tPLH OPPOSITE PHASE INPUT TRANSITION tPHL tPHL
3V 1.5V 0V VOH 1.5V VOL 3V 1.5V 0V
2563 drw 08
CONTROL INPUT tPZL OUTPUT NORMALLY LOW OUTPUT NORMALLY HIGH SWITCH CLOSED tPZH SWITCH OPEN 3.5V 1.5V tPLZ
VOL
NOTES: 1. Diagram shown for input Control Enable-LOW and input Control DisableHIGH 2. Pulse Generator for All Pulses: Rate 1.0MHz; tF 2.5ns; tR 2.5ns
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IDT54/74FCT623T/AT/CT FAST CMOS OCTAL BUS TRANSCEIVERS (3-STATE)
MILITARY AND COMMERCIAL TEMPERATURE RANGES
ORDERING INFORMATION
IDT XX FCT Temp. Range X Family XXXX Device Type X Package X Process Blank B P D SO L E 623T 623AT 623CT Blank 54 74 Commercial MIL-STD-883, Class B Plastic DIP CERDIP Small Outline IC Leadless Chip Carrier CERPACK Octal Bus Transceiver (Inverting) Octal Bus Transceiver (Non-Inverting)
High Drive -55C to +125C 0C to +70C
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