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IDTQS34XR245 HIGH SPEED CMOS QUICKSWITCH 32-BIT LOW RESISTANCE BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH PRODUCTS HIGH-SPEED CMOS QUICKSWITCH 32-BIT LOW RESISTANCE MULTIWIDTHTM BUS SWITCHES
FEATURES:
* * * * * * * *
IDTQS34XR245
Enhanced N channel FET with no inherent diode to Vcc 2.5 bidirectional switches connect inputs to outputs Zero propagation delay, zero ground bounce QS34XR245Q3 is a 32-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 80-pin Millipaq package
DESCRIPTION:
APPLICATIONS:
* Low resistance applications * Hot-swapping, hot-docking (low resistance for PCI and Compact PCI applications) * Bus switching, isolation * Logic replacement (data processing) * Capacitance reduction and isolation * Power conservation * Clock gating * Voltage translation (5V to 3.3V)
The QS34XR245 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-through pin out. This device is available in the MillipaQ package, the worlds first small outline 32-bit solution. The low on-resistance of the QS34XR245 allows inputs to be connected to outputs without adding propagation delay and without generating additional ground bounce noise. When Output Enable (OEx) is low, the switches are turned on, connecting bus A to bus B. When OEx is high, the switches are turned off. The QS34XR245 is ideally suited for 32/64 bit applications where board space is at a premium. The low resistance of QS34XR245 makes it ideal for PCI hot docking application. QuickSwitch devices provide an order of magnitude faster speed than conventional logic devices.
FUNCTIONAL BLOCK DIAGRAM
A0 A1 A2 A3 A4 A5 A6 A7 A16 A17 A18 A19 A20 A21 A22 A23
OE1
OE3
B0
B1
B2
B3
B4
B5
B6
B7
B16
B17
B18
B19
B20
B21
B22
B23
A8
A9
A10
A11
A12
A13
A14
A15
A24
A25
A26
A27
A28
A29
A30
A31
OE2
OE4
B8
B9
B10
B11
B12
B13
B14
B15
B24
B25
B26
B27
B28
B29
B30
B31
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-5544/1
IDTQS34XR245 HIGH SPEED CMOS QUICKSWITCH 32-BIT LOW RESISTANCE BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
NC A0 A1 A2 A3 A4 A5 A6 A7 GND NC A8 A9 A10 A11 A12 A13 A14 A15 GND NC A16 A17 A18 A19 A20 A21 A22 A23 GND NC A24 A25 A26 A27 A28 A29 A30 A31 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 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 VCC OE1 B0 B1 B2 B3 B4 B5 B6 B7 VCC OE2 B8 B9 B10 B11 B12 B13 B14 B15 VCC OE3 B16 B17 B18 B19 B20 B21 B22 B23 VCC OE4 B24 B25 B26 B27 B28 B29 B30 B31
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 1.4 -65 to +150 Unit V V V V mA W C
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 7 Max.(1) 4 8 Unit pF pF
Quickswitch Channels (Switch OFF)
NOTE: 1. This parameter is measured at characterization but not tested.
PIN DESCRIPTION
Pin Names OEx Ax, Bx Output Enable Data I/Os Description
FUNCTION TABLE(1)
OE1x H L
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level
Function Disconnect Ax = Bx
MILLIPAQ (Q3) TOP VIEW 2
IDTQS34XR245 HIGH SPEED CMOS QUICKSWITCH 32-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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IDTQS34XR245 HIGH SPEED CMOS QUICKSWITCH 32-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. 12 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) Ax to/from Bx Switch Turn-on Delay OE to Ax/Bx Switch Turn-off Delay (2) OE to Ax/Bx 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 = 30pF. 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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IDTQS34XR245 HIGH SPEED CMOS QUICKSWITCH 32-BIT LOW RESISTANCE BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQS XXXXX Device Type XX Package X Process
Blank
Industrial (-40C to +85C)
Q3
80-Pin M illipaQ
34XR245
High Speed CM OS 32-Bit Low Resitance MultiW idth 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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