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IDTQS316211 HIGH-SPEED CMOS 24-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH(R) PRODUCTS HIGH-SPEED CMOS 24-BIT BUS SWITCH
FEATURES:
* * * * * *
IDTQS316211
Enhanced N channel FET with no inherent diode to Vcc 5 bidirectional switches connect inputs to outputs Zero propagation delay, zero ground bounce TTL-compatible input and output levels Undershoot clamp diodes on all switch and control inputs Available in SSOP and TSSOP packages
DESCRIPTION:
APPLICATIONS:
* * * * * * *
Hot-swapping, hot-docking Voltage translation (5V to 3.3V) Logic replacement (data processing) Power conservation Capacitance reduction and isolation Bus isolation Clock gating
The QS316211 provides a set of 24 high-speed CMOS TTL-compatible bus switches. The low ON resistance of the QS316211 allows inputs to be connected to outputs without adding propagation delay and without generating additional ground bounce noise. The device operates as a 24-bit bus switch. When 1OE is low, 1An is connected to 1Bn. When 2OE is low, 2An is connected to 2Bn. The QS316211 is ideal for switching wide digital buses, 5V to 3.3V translation, and for hot plug buffering. The QS316211 is characterized for operation at -40C to +85C.
FUNCTIONAL BLOCK DIAGRAM
1A1 1B1
1A12
1B12
1OE
2A1
2B1
2A12
2B12
2OE
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
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c 1999 Integrated Device Technology, Inc.
NOVEMBER 1999
DSC-5570/2
IDTQS316211 HIGH-SPEED CMOS 24-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
NC
1A1 1A2 1A3 1A4 1A5 1A6
ABSOLUTE MAXIMUM RATINGS(1)
Symbol 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 (TA = 85C) Storage Temperature Max -0.5 to +7 -0.5 to +7 -0.5 to +7 -3 120 0.93 -65 to +150 Unit V V V V mA W C
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29
1OE 2OE 1B1 1B2 1B3 1B4 1B5
VTERM(2) VTERM(3) VTERM(3) VAC IOUT PMAX TSTG
GND
1A7 1A8 1A9 1A10 1A11 1A12 2A1 2A2
GND
1B6 1B7 1B8 1B9 1B10 1B11 1B12 2B1 2B2 2B3
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. 4.5 5.5 Max. (1) 6 7 Unit pF pF
NOTE: 1. This parameter is guaranteed but not production tested.
VCC
2A3
PIN DESCRIPTION
Pin Names xA1 - xA12 xB1 - xB12 1OE - 2OE I/O I/O I/O I Bus A Bus B Data Select Description
GND
2A4 2A5 2A6 2A7 2A8 2A9 2A10 2A11 2A12
GND
2B4 2B5 2B6 2B7 2B8 2B9 2B10 2B11 2B12
FUNCTION TABLE(1)
1OE L L H H 2OE L H L H xA
1Bx 1Bx
xY
2Bx 1Ax 1Ax 2Ax
Function to to to
1Bx, 2Ax 1Bx 2Bx
to
2Bx
Z
2Bx
Z Z
Z
Disconnect
SSOP/ TSSOP TOP VIEW
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level Z = High-Impedance
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IDTQS316211 HIGH-SPEED CMOS 24-BIT BUS SWITCH
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(2) Pass Voltage(3) 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. -- -- 0.01 0.01 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. RON is guaranteed but not production tested. 3. 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
VIN
(Volts)
2.0
2.5
3.0
3.5
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IDTQS316211 HIGH-SPEED CMOS 24-BIT BUS SWITCH
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 2.5 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) xAx to xBx, xBx to xAx Switch Turn-On Delay xOE to xAx, xBx Switch Turn-Off Delay(2) xOE to xAx, xBx 1.5 1.5 6.5 6.2 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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IDTQS316211 HIGH-SPEED CMOS 24-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQS XXXXX Device Type XX Package X Process
Blank PV PA PAG
Industrial (-40C to +85C)
Shrink Small Outline Package Thin Shrink Small Outline Package TSSOP - Green
316211 High Speed CMOS 24-Bit Bus Switch
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