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IDTQS3861 HIGH-SPEED CMOS 10-BIT BUS SWITCH WITH FLOW-THROUGH PINOUT
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH(R) PRODUCTS HIGH-SPEED CMOS 10-BIT BUS SWITCH WITH FLOW-THROUGH PINOUT
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IDTQS3861
FEATURES:
DESCRIPTION:
Enhanced N channel FET with no inherent diode to Vcc 5 bidirectional switches connect inputs to outputs Zero propagation delay, zero ground bounce Undershoot clamp diodes on all switch and control inputs Available in SOIC, QSOP, and TSSOP packages
The QS3861 provides a set of ten high-speed CMOS TTL-compatible bus switches. The low ON resistance (5) of the QS3861 allows inputs to be connected without adding propagation delay and without generating additional ground bounce noise. The Bus Enable (BE) signal turns the switches on. The QS3861 is characterized for operation at -40C to +85C.
APPLICATIONS:
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Hot-swapping, hot-docking Voltage translation (5V to 3.3V) Power Conservation Capacitance reduction and isloation Bus Isolation Clock Gating
FUNCTIONAL BLOCK DIAGRAM
A0
B0
A9
B9
BE
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
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c 2000 Integrated Device Technology, Inc.
DECEMBER 2000
DSC-5767/1
IDTQS3861 HIGH-SPEED CMOS 10-BIT BUS SWITCH WITH FLOW-THROUGH PINOUT
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
NC A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 GND 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 Vcc BE B0 B1 B2 B3 B4 B5 B6 B7 B8 B9
ABSOLUTE MAXIMUM RATINGS(1)
Symbol VTERM(2) VTERM(3) VTERM(3) VAC IOUT PMAX TSTG Description Supply Voltage to Ground DC Switch Voltage VS DC Input Voltage VIN AC Input Voltage (pulse width 20ns) DC Output Current Maximum Power Dissipation Storage Temperature Max -0.5 to +7 -0.5 to +7 -0.5 to +7 -3 120 0.5 -65 to +150 Unit V V V V mA W C
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. 2. VCC terminals. 3. All terminals except VCC .
CAPACITANCE (TA = +25C, f = 1MHz, VIN = 0V, VOUT = 0V)
Pins Control Inputs Quickswitch Channels (Switch OFF) Typ. 3 5 Max. (1) 5 7 Unit pF pF
SOIC/ QSOP/ TSSOP TOP VIEW
NOTE: 1. This parameter is guaranteed but not production tested.
PIN DESCRIPTION
Pin Names A0 - A9 B0 - B9 BE Bus A Bus B Bus Switch Enable Description
FUNCTION TABLE(1)
BE H L
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level Z = High-Impedance
A0 - A9 Z B0 - B9
Function Disconnect Connect
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IDTQS3861 HIGH-SPEED CMOS 10-BIT BUS SWITCH WITH FLOW-THROUGH PINOUT
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: Industrial: TA = -40C to +85C, VCC = 5V 5%
Symbol VIH VIL IIN IOZ RON VP Parameter Input HIGH Voltage Input LOW Voltage Input Leakage Current (Control Inputs) Off-State Current (Hi-Z) Switch ON Resistance Pass Voltage(2) Test Conditions Guaranteed Logic HIGH for Control Pins Guaranteed Logic LOW for Control Pins 0V VIN VCC 0V VOUT VCC, Switches OFF VCC = Min., VIN = 0V, ION = 30mA VCC = Min., VIN = 2.4V, ION = 15mA VIN = VCC = 5V, IOUT = -5A Min. 2 -- -- -- -- -- 3.7 Typ.(1) Max. -- -- 0.01 0.01 5 10 4 -- 0.8 1 1 7 15 4.2 V Unit V V A A
NOTES: 1. Typical values are at VCC = 5V and TA = 25C. 2. Pass voltage is guaranteed but not production tested.
TYPICAL ON RESISTANCE vs VIN AT VCC = 5V
16 14
RON
(ohms)
12 10 8 6 4 2 0 0.0 0.5 1.0 1.5
VIN
(Volts)
2.0
2.5
3.0
3.5
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IDTQS3861 HIGH-SPEED CMOS 10-BIT BUS SWITCH WITH FLOW-THROUGH PINOUT
INDUSTRIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
Symbol ICCQ ICC ICCD Parameter Quiescent Power Supply Current Power Supply Current per Input HIGH(3) Dynamic Power Supply Current per MHz(4) Test Conditions(1) VCC = Max., VIN = GND or VCC, f = 0 VCC = Max., VIN = 3.4V, f = 0 VCC = Max., A and B Pins Open, BE Input Toggling @ 50% Duty Cycle
NOTES: 1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics. 2. Typical values are at VCC = 5V and TA = 25C. 3. Per TTL-driven input (VIN = 3.4V, control inputs only). A and B pins do not contribute to Icc. 3. This current applies to the control inputs only and represents the current required to switch internal capacitance at the specified frequency. The A and B inputs generate no significant AC or DC currents as they transition. This parameter is guaranteed but not production tested.
Typ.(2) 0.2
Max. 3 2.5 0.25
Unit A mA mA/MHz
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
TA = -40C to +85C, VCC = 5V 5% CLOAD = 50pF, RLOAD = 500 unless otherwise noted.
Symbol tPLH tPHL tPZL tPZH tPLZ tPHZ Parameter Data Propagation Delay(2) A to B, B to A Switch Turn-On Delay BE to A or B Switch Turn-Off Delay(2) BE to A or B 1.5 1.5 6.5 5.5 ns ns Min. (1) Typ. Max. 0.25(3) Unit ns
NOTES: 1. Minimums are guaranteed but not production tested. 2. This parameter is guaranteed but not production tested. 3. The bus switch contributes no propagation delay other than the RC delay of the ON resistance of the switch and the load capacitance. The time constant for the switch alone is of the order of 0.25ns at CL = 50pF. Since this time constant is much smaller than the rise and fall times of typical driving signals, it adds very little propagation delay to the system. Propagation delay of the bus switch, when used in a system, is determined by the driving circuit on the driving side of the switch and its interaction with the load on the driven side.
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IDTQS3861 HIGH-SPEED CMOS 10-BIT BUS SWITCH WITH FLOW-THROUGH PINOUT
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQS XXXXX Device Type XX Package
SO Q PA 3861
Small Outline IC Quarter Size Outline Package Thin Shrink Small Outline Package High Speed CMOS 10-Bit Bus Switch with Flow-Through Pinout
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for Tech Support: logichelp@idt.com (408) 654-6459
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