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IDTQS32XR861 HIGH-SPEED CMOS 20-BIT LOW RESISTANCE ACTIVE LOW BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH(R) PRODUCTS IDTQS32XR861 HIGH-SPEED CMOS 20-BIT LOW RESISTANCE, ACTIVE LOW BUS SWITCH WITH FLOW-THROUGH PINOUT
FEATURES:
* * * * * Enhanced N channel FET with no inherent diode to Vcc 2.5 bidirectional switches connect inputs to outputs Zero propagation delay, zero ground bounce Undershoot clamp diodes on all switch and control inputs Available in 48-pin QVSOP package The QS32XR861 provides two sets of ten high-speed CMOS, TTLcompatible, low resistance bus switches. The very low ON resistance (2.5) of the QS32XR861 allows inputs to be connected to outputs without adding propagation delay and without generating additional ground bounce noise. The switches are controlled by independent active Low Enable (BE). The QS32XR861 is ideal for switching digital buses, as well as for hot plug buffering and 5V to 3.3V conversion. The low ON resistance of the QS32XR861 makes it ideal for PCI hot-docking applications. The QS32XR831 is characterized for operation at -40C to +85C.
DESCRIPTION:
APPLICATIONS:
* Hot-swapping, hot-docking (low resistance for PCI and Compact PCI applications) * Voltage translation (5V to 3.3V) * Power conservation * Capacitance reduction and isolation * Bus isolation * Clock gating
FUNCTIONAL BLOCK DIAGRAM
A0
B0
A9
B9
BE1
A10
B10
A19
B19
BE2
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-5542/1
IDTQS32XR861 HIGH-SPEED CMOS 20-BIT LOW RESISTANCE ACTIVE LOW BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS(1)
Symbol VTERM(2) 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 0.5 -65 to +150 Unit V V V V mA W C VTERM(3) VTERM(3) VAC IOUT PMAX TSTG
NC A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 GND NC A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 GND
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25
Vcc BE 1 B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 Vcc BE 2 B10 B11 B12 B13 B14 B15 B16 B17 B18 B19
NOTE: 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.
(TA = +25C, f = 1.0MHZ, VIN = 0V, VOUT = 0V)
Pins Control Pins Quickswitch Channels (Switch OFF) Typ. 3 5 Max.(1) 4 6 Unit pF pF
CAPACITANCE
NOTE: 1. This parameter is measured at characterization but not tested.
PIN DESCRIPTION
Pin Names A0 - A19 B0 - B19 BEn I/O I/O I/O I Bus A Bus B Bus Enable Description
FUNCTION TABLE(1)
BE1 L L H H BE2 L H L H A0 - A9 B0 - B9 B0 - B9 Z Z A10 - A19 B10 - B19 Z B10 - B19 Z Function Connect Connect Connect Disconnect
QVSOP TOP VIEW
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level Z = High-Impedance
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IDTQS32XR861 HIGH-SPEED CMOS 20-BIT LOW RESISTANCE ACTIVE LOW BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: Industrial: TA = -40C to +85C, VCC = 5.0V 10%
Symbol VIH VIL IIN IOZ RON VP Parameter Input HIGH Level Input LOW Level Input LeakageCurrent (Control Inputs) Off-State Output Current (Hi-Z) Switch ON Resistance(2) Pass Voltage(3) 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 VCC = 5V, IOUT = -5A Min. 2 -- -- -- -- -- 3.7 Typ.(1) -- -- 0.01 0.01 2.5 4 4 Max. -- 0.8 1 1 5 8.5 4.3 Unit V V A A V
NOTES: 1. Typical values are at VCC = 5.0V, TA = 25C. 2. Max. value of RON is guaranteed but not production tested. 3. Pass Voltage is guaranteed but not production tested.
TYPICAL ON RESISTANCE vs VIN AT VCC = 5V
RON
(ohms)
16 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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IDTQS32XR861 HIGH-SPEED CMOS 20-BIT LOW RESISTANCE ACTIVE LOW BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
Symbol ICCQ ICC ICCD Parameter Quiescent Power Supply Current Power Supply Current per Control Input HIGH(3) Dynamic Power Supply Current per MHz(4) Test Conditions(1) VCC = Max., BEn = GND or Vcc, f = 0 VCC = Max., VIN = 3.4V, f = 0 VCC = Max., A and B pins open Control Input Toggling at 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 = 5.0V, 25C ambient. 3. Per TLL driven input (VIN = 3.4V, control inputs only). A and B pins do not contribute to Icc. 4. 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 pins generate no significant AC or DC currents as they transition. This parameter is guaranteed but not production tested.
Typ(2) 0.2 -- --
Max. 6 2.5 0.25
Unit A mA mA/MHz
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
TA = -40C to +85C, VCC = 5.0V 10%; CLOAD = 50pF, RLOAD = 500 unless otherwise noted.
Symbol tPLH tPHL tPZH tPZL tPHZ tPLZ Data Propagation Delay (2,3) An to/from Bn Switch Turn-on Delay BEn to An/Bn Switch Turn-off Delay (2) BEn to An/Bn 1.5 -- 4.5
ns
Parameter
Min. (1) -- 1.5
Typ. -- --
Max. 0.12 5.6
Unit
ns 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 0.12ns for 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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IDTQS32XR861 HIGH-SPEED CMOS 20-BIT LOW RESISTANCE ACTIVE LOW BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQS XXXXX Device Type XX Package X Process
Blank
Industrial (-40C to +85C )
Q1
QVSOP
32XR861
High Speed CMOS 20-Bit Low Resistance, Active Low Bus Switch with Flow-Through Pinout
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for Tech Support: logichelp@idt.com (408) 654-6459
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