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IDTQS32XR245 HIGH-SPEED CMOS QUICKSWITCH 16-BIT LOW RESISTANCE BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH(R) PRODUCTS HIGH-SPEED CMOS QUICKSWITCH 16-BIT LOW RESISTANCE MULTIWIDTHTM BUS SWITCH
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 QS32XR245 is a 16-bit version of QS3R245 Flow-through pinout for easy layout Undershoot clamp diodes on all switch and control inputs TTL-compatible control inputs Available in 40-pin QVSOP package
IDTQS32XR245
DESCRIPTION:
APPLICATIONS:
* Low resistance applications * Hot-swapping, hot-docking (low resistance for PCI and Compact PCI applications) * Voltage translation (5V to 3.3V) * Capacitance reduction and isolation * Power conservation * Logic replacement (data processing) * Clock gating
The QS32XR245 is a member of the MultiWidthTM family of QuickSwitch devices and provides a set of 32 high-speed low resistance CMOS compatible bus switches in a flow-thru pinout. This device is available in the MillipaQ package, the world's first small outline 16-bit solution. The low onresistance of the QS32XR245 allows inputs to be connected to outputs without adding propagation delay and without generating additional ground bounce noise. When Output Enable (OEn) is low, the switches are turned on, connecting bus A to bus B. When OEn is high, the switches are turned off. This device is ideally suited for 16/32 bit applications where board space is at a premium.The low resistance of QS32XR245 makes it ideal for PCI hot docking application. QuickSwitch devices provide an order of magnitude faster speed than conventional logic devices. The QS32XR245 is characterized for operation at -40C to +85C.
FUNCTIONAL BLOCK DIAGRAM
A0 A1 A2 A3 A4 A5 A6 A7
OE1
B0
B1
B2
B3
B4
B5
B6
B7
A8
A9
A10
A11
A12
A13
A14
A15
OE2
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 1999 Integrated Device Technology, Inc.
NOVEMBER 1999
DSC-5545/2
IDTQS32XR245 HIGH-SPEED CMOS QUICKSWITCH 16-BIT LOW RESISTANCE BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
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 (TA = 85C) Storage Temperature Max -0.5 to +7 -0.5 to +7 -0.5 to +7 -3 120 0.92 -65 to +150 Unit V V V V mA W C
NC A0 A1 A2 A3 A4 A5 A6 A7 G ND NC A8 A9 A10 A11 A12 A13 A14 A15 G ND
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21
VCC OE1 B0 B1 B2 B3 B4 B5 B6 B7 VCC OE2 B8 B9 B10 B11 B12 B13 B14 B15
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.
CAPACITANCE
Pins Control Pins
(TA = +25C, f = 1.0MHZ, VIN = 0V, VOUT = 0V)
Typ. 3 5 Max.(1) 4 6 Unit pF pF
Quickswitch Channels (Switch OFF)
NOTE: 1. This parameter is measured at characterization but not tested.
PIN DESCRIPTION
Pin Names OE1, OE2 An Bn I/O I I/O I/O Bus A Bus B Description Output Enable
QVSOP TOP VIEW
FUNCTION TABLE(1)
OE1 H L H L OE2 H H L L A0 - A7 Z B0 - B7 Z B0 - B7 A8 - A15 Z Z B8 - B15 B8 - B15 Function Disconnect Connect Connect Connect
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level Z = High-Impedance
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IDTQS32XR245 HIGH-SPEED CMOS QUICKSWITCH 16-BIT LOW RESISTANCE 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 VIN = VCC = 5V, IOUT = -5A Min. 2 -- -- -- -- -- 3.7 Typ.(1) -- -- -- -- 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
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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IDTQS32XR245 HIGH-SPEED CMOS QUICKSWITCH 16-BIT LOW RESISTANCE 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 at 50% Duty Cycle
NOTES: 1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics. 2. Per TLL 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.
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 tPZL tPZH tPLZ tPHZ Data Propagation Delay (2,3) An to/from Bn Switch Turn-on Delay OEn to An/Bn Switch Turn-off Delay (2) OEn to An/Bn 0.5 -- 4.5
ns
Parameter
Min. (1) -- 0.5
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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IDTQS32XR245 HIGH-SPEED CMOS QUICKSWITCH 16-BIT LOW RESISTANCE BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQS XXXXX Device Type XX Package X Process
Blank
Industrial (-40C to +85C)
Q2 Q2G
40-Pin QVSOP QVSOP - Green
32XR245 High Speed CMOS Quickswitch 16-Bit Low Resistance MultiWidth Bus Switch
CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054
for SALES: 800-345-7015 or 408-727-6116 fax: 408-492-8674 www.idt.com
for Tech Support: logichelp@idt.com (408) 654-6459
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