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IDTQS32384 HIGH-SPEED CMOS 10-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH(R) PRODUCTS HIGH-SPEED CMOS 10-BIT BUS SWITCH
FEATURES: DESCRIPTION:
IDTQS32384
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Enhanced N channel FET with no inherent diode to Vcc 5 bidirectional switches connect inputs to outputs Zero ground bounce 25 resistors for low noise Undershoot clamp diodes on all switch and control inputs Two enables control five bits each Available in QSOP and SOIC packages
The QS32384 provides a set of ten high-speed CMOS, TTL-compatible bus switches. Two banks of five switches are controlled by independent Bus Enable (BE) signals. The QS32384 adds an internal series resistor with each switch to reduce reflection noise in high speed applications. When closed, the switch acts as the source (series) termination for the driver connected to it. The QS32384 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 Clock gating Bus isolation
FUNCTIONAL BLOCK DIAGRAM
A0
B0
A4
B4
A5
B5
A9
B9
BEA BEB
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
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c 2000 Integrated Device Technology, Inc.
APRIL 2000
DSC-5751/1
IDTQS32384 HIGH-SPEED CMOS 10-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
BEA B 0 A 0 A 1 B 1 B 2 A 2 A 3 B 3 B 4 A 4 GND 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 2 4 2 3 2 2 2 1 2 0 1 9 1 8 1 7 1 6 1 5 1 4 1 3 VCC B 9 A 9 A 8 B 8 B 7 A 7 A 6 B 6 B 5 A 5 BEB
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 0.5 -65 to +150 Unit V V V V mA W C
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. 3 5 Max. (1) 5 7 Unit pF pF
QSOP/ SOIC TOP VIEW
NOTE: 1. This parameter is guaranteed but not production tested.
PIN DESCRIPTION
Pin Names A0 - A9 B0 - B9 BEA, BEB I/O I/O I/O I Bus A Bus B Bus Switch Enable Description
FUNCTION TABLE(1)
BEA H L H L BEB H H L L B0 - B4 Z A0 - A4 Z A0 - A4 B5 - B9 Z Z A5 - A9 A5 - A9 Function Disconnect Connect Connect Connect
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level Z = High-Impedance
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IDTQS32384 HIGH-SPEED CMOS 10-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 VIN = VCC = 5V, IOUT = -5A Min. 2 -- -- -- 20 20 3.7 Typ.(1) Max. -- -- 0.01 0.01 28 35 4 -- 0.8 1 1 40 48 4.2 V Unit V V A A
NOTES: 1. Typical values are at VCC = 5V and TA = 25C. 2. Pass voltage is guaranteed but not production tested.
TYPICAL ON RESISTANCE vs VIN AT VCC = 5V
80
RON
(ohms)
70 60 50 40 30 20 10 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
VIN
(Volts)
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IDTQS32384 HIGH-SPEED CMOS 10-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. 1.5 2.5 0.25 Unit mA 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, control inputs only). A, B, C, and D 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 5% CLOAD = 50pF, RLOAD = 500 unless otherwise noted.
Symbol tPLH tPHL tPZL tPZH tPLZ tPHZ Parameter Data Propagation Delay(2) Ax to Bx, Bx to Ax Switch Turn-On Delay BEA, BEB to Ax, Bx Switch Turn-Off Delay(2) BEA, BEB to Ax, Bx 1.5 1.5 7.5 5.5 ns ns Min. (1) Typ. Max. 1.25(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 1.25ns 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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IDTQS32384 HIGH-SPEED CMOS 10-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQS XXXXX Device Type XX Package X Process
Blank
Industrial (-40C to +85C)
SO Q
Small Outline IC Quarter Size Outline Package
32384
High Speed CMOS 10-Bit Bus Switch
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