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IDTQS316245 HIGH-SPEED CMOS QUICKSWITCH 16-BIT WIDEBUS
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH(R) PRODUCTS HIGH-SPEED CMOS QUICKSWITCH 16-BIT WIDEBUSTM COMPATIBLE BUS SWITCH
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IDTQS316245
FEATURES:
Enhanced N channel FET with no inherent diode to Vcc 5 bidirectional switches connect inputs to outputs Pin compatible with FCT16245 Flowthrough pinout for easy layout Zero propagation delay, zero ground bounce TTL-compatible input and output levels Undershoot clamp diodes on all switch and control inputs Available in SSOP package
DESCRIPTION:
The QS316245 provides a set of 16 high-speed CMOS TTL-compatible bus switches (two banks of 8 switches each) in a flow-thru pinout. The low ON resistance of the QS316245 allows inputs to be connected to outputs without adding propagation delay and without generating additional ground bounce noise. The Output Enable (OEx) signal turns the switches on similar to the OEx signal of the 74'245. The QS316245 is ideally suited for 5V to 3.3V translation, bus switching and isolation, and hot insertion. QuickSwitch devices provide an order of magnitude faster speed than conventional logic devices.
APPLICATIONS:
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Hot-swapping, hot-docking Voltage translation (5V to 3.3V) Bus switching, isolation Power conservation, clock gating Logic replacement
FUNCTIONAL BLOCK DIAGRAM
A0 A1 A2 A3 A4 A5 A6 A7
OE 1
B0
B1
B2
B3
B4
B5
B6
B7
A8
A9
A10
A11
A12
A13
A14
A15
OE 2
B8
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
B9
B10
B11
B12
B13
B14
B15
INDUSTRIAL TEMPERATURE RANGE
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c 2000 Integrated Device Technology, Inc.
JANUARY 2000
DSC-5720/1
IDTQS316245 HIGH-SPEED CMOS QUICKSWITCH 16-BIT WIDEBUS
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
NC B0 B1 GND B2 B3 Vcc B4 B5 GND B6 B7 B8 B9 GND B10 B11 Vcc B12 B13 GND B14 B15 NC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
SSOP TOP VIEW
ABSOLUTE MAXIMUM RATINGS(1)
Symbol Description Supply Voltage to Ground DC Switch Voltage to Ground DC Input Voltage VIN AC Input Voltage (pulse width 20ns) DC Output Current Maximum Power 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
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25
OE1 A0 A1 GND A2 A3 Vcc A4 A5 GND A6 A7 A8 A9 GND A10 A11 Vcc A12 A13 GND A14 A15 OE2
VTERM(2) VTERM(3) VTERM(3) VAC IOUT PMAX TSTG
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
NOTE: 1. This parameter is guaranteed but not production tested.
PIN DESCRIPTION
Pin Names Ax Bx OEx I/O I/O I/O I Bus A Bus B Bus Enable Description
FUNCTION TABLE(1)
OEx L H Ax Bx Z Connect Disconnect Function
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level X = High-Impedance
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IDTQS316245 HIGH-SPEED CMOS QUICKSWITCH 16-BIT WIDEBUS
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: Industrial: TA = -40C to +85C, VCC = 5V 10%
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 Inputs Guaranteed Logic LOW for Control Inputs 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. -- -- -- -- 5 10 4 -- 0.8 1 1 7 12 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
RON
(ohms)
14 12 10 8 6 4 2 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
VIN
(Volts)
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IDTQS316245 HIGH-SPEED CMOS QUICKSWITCH 16-BIT WIDEBUS
INDUSTRIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
Symbol ICCQ ICC ICCD Parameter Quiescent Power Supply Current Power Supply Current per Control Input HIGH(2) Dynamic Power Supply Current per MHz(3) 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, Control Inputs Toggling @ 50% Duty Cycle Max. 3 1.5 0.25 Unit A mA mA/MHz
NOTES: 1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics. 2. Per TTL-driven input (VIN = 3.4V). 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.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
TA = -40C to +85C, VCC = 5V 10% CLOAD = 50pF, RLOAD = 500 unless otherwise noted.
Symbol tPLH tPHL tPZL tPZH tPLZ tPHZ Parameter Data Propagation Delay(2) Ax to Bx, Bx to Ax Switch Turn-On Delay OEx to Ax/Bx Switch Turn-Off Delay(2) OEx to Ax/Bx 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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IDTQS316245 HIGH-SPEED CMOS QUICKSWITCH 16-BIT WIDEBUS
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQS XXXXX Device Type XX Package X Process
Blank
Industrial (-40C to +85C)
PV
Shrink Small Outline Package
316245
High Speed CMOS QuickSwitch 16-Bit WidebusTM Compatible Bus Switch
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