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IDTQS32X384 HIGH-SPEED CMOS 20-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH(R) PRODUCTS HIGH-SPEED CMOS 20-BIT BUS SWITCH
IDTQS32X384
FEATURES:
* * * * * * * *
Enhanced N channel FET with no inherent diode to VCC 5 bidirectional switches connect inputs to outputs Zero propagation delay Zero ground bounce Undershoot clamp diodes on all switch and control pins Four enables control five bits each TTL-compatible input and output levels Available in 48-pin QVSOP package
DESCRIPTION:
The QS32X384 provides a set of twenty high-speed CMOS TTLcompatible bus switches. The low ON resistance of the QS32X384 allows inputs to be connected to outputs without adding propagation delay and without generating additional ground bounce noise. The Bus Enable (BE) signals turn the switches on. Four Bus Enable signals are provided, one for each of five bits of the 20-bit bus. The `384 family of QuickSwitch products is ideal for switching wide digital buses, as well as hotplug buffering, and 5V to 3V conversion. The QS32X384 is characterized for operation at -40C to +85C.
APPLICATIONS:
* * * * * *
Hot-swapping, hot-docking Voltage translation (5V to 3.3V) Power conservation Capacitance reduction and isolation Bus isolation Clock gating
FUNCTIONAL BLOCK DIAGRAM
A0 B0 A10 B10
A4 A5
B4 B5
A14 A15
B14 B15
A9
B9
A19
B19
BEA BEC BED BEB
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
c 2002 Integrated Device Technology, Inc.
APRIL 2002
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DSC-5729/1
IDTQS32X384 HIGH-SPEED CMOS 20-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
BEA B0 A0 A1 B1 B2 A2 A3 B3 B4 A4 GND BEC B5 A5 A6 B6 B7 A7 A8 B8 B9 A9 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
QVSOP TOP VIEW
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 0.5 -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
VCC B19 A19 A18 B18 B17 A17 A16 B16 B15 A15 BEB VCC B14 A14 A13 B13 B12 A12 A11 B11 B10 A10 BED
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)
NOTE: 1. This parameter is guaranteed but not production tested.
Typ. 3 5
Max.(1) 5 7
Unit pF pF
FUNCTION TABLE(1)
BEA H L H L BEC H L BEB H H L L BED H H L L B0 - B4 Hi-Z A0 - A4 Hi-Z A0 - A4 B5 - B9 Hi-Z A5 - A9 Hi-Z A5 - A9 B15 - B19 Hi-Z Hi-Z A15 - A19 A15 - A19 B10 - B14 Hi-Z Hi-Z A10 - A14 A10 - A14 Function Disconnect Connect Connect Connect Function Disconnect Connect Connect Connect
PIN DESCRIPTION
Pin Names A0 - A19 B0 - B19 BEA BEB BEC BED I/O I/O I/O I I I I Bus A Bus B Enable, 0 - 4 Enable, 15 - 19 Enable, 5 - 9 Enable, 10 - 14 Description
H L
NOTE: 1. H = L= X= Z=
HIGH Voltage Level LOW Voltage Level Don't care High-Impedence
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IDTQS32X384 HIGH-SPEED CMOS 20-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 5%
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 VCC = 5V, IOUT = -5A
NOTES: 1. Typical values are at VCC = 5V and TA = 25C. 2. Pass voltage is guaranteed but not production tested.
Min. 2 -- -- -- -- -- 3.7
Typ.(1) -- -- 0.01 0.01 5 10 4
Max. -- 0.8 1 1 7 15 4.2
Unit V V A A V
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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IDTQS32X384 HIGH-SPEED CMOS 20-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 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. Per TTL 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. 3 2.5 0.25
Unit mA mA mA/MHz
TA = -40C to +85C, VCC = 5.0V 5% CLOAD = 50pF, RLOAD = 500 unless otherwise noted.
Symbol tPLH tPHL tPZL tPZH tPLZ tPHZ Data Propagation Delay (2,4) Ax to Bx, Bx to Ax Switch Turn-on Delay BEn to Ax, Bx Switch Turn-off Delay (2) BEn to Ax, Bx Parameter
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
Min. (1) -- 1.5 1.5 Typ. -- -- -- Max. 0.25 (3) 6.5 5.5 Unit
ns ns ns
NOTES: 1. Minimums are guaranteed but not production tested. 2. This parameter is guaranteed but not production tested. 3. The time constant for the switch alone is of the order of 0.25ns for CL = 50pF. 4. The bus switch contributes no propagation delay other than the RC delay of the ON resistance of the switch and the load capacitance. 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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IDTQS32X384 HIGH-SPEED CMOS 20-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQS XXXXX Device Type XX Package X Process
Blank
Industrial (-40C to +85C)
Q1
48-Pin QVSOP
32X384
High Speed CMOS 20-Bit Bus Switch
DATA SHEET DOCUMENT HISTORY
4/8/2002 Changed Pin layout diagram
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for Tech Support: logichelp@idt.com (408) 654-6459
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