QUALITY SEMICONDUCTOR, INC. QuickSwitch® Products High-Speed CMOS

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QUALITY SEMICONDUCTOR, INC. QuickSwitch® Products High-Speed CMOS

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QS32X245, QS32X2245
QUALITY SEMICONDUCTOR, INC.
QuickSwitch® Products High-Speed CMOS QuickSwitch Double Width Switches
DESCRIPTION
QS32X245 QS32X2245
Enhanced channel with inherent diode bidirectional switches connect inputs outputs Dual '245 function QS32X2245 resistors noise Zero propagation delay, zero ground bounce Undershoot clamp diodes switch control inputs TTL-compatible control inputs Available 40-pin QVSOP (Q2)
QS32X245 provides high-speed CMOS TTL-compatible switches flow-thru pinout. resistance QS32X245 allows inputs connected outputs without adding propagation delay without generating additional ground bounce noise. QS32X2245 includes internal resistors reduce reflection noise high speed applications. Output Enable (OEn) signal turns switches similar signal 74'245. QuickSwitch devices provide order magnitude faster speed than conventional logic devices.
APPLICATIONS
Hot-docking, hot-swapping (Application Note AN-13) Voltage translation 3.3V; Application Note AN-11) switching, isolation Power conservation, clock gating Logic replacement
Figure Functional Block Diagram
MDSL-00040-03 JULY 1997
QUALITY SEMICONDUCTOR, INC.
QS32X245, QS32X2245 Table Description
Name OE1, Description Output Enable
Figure Configuration (All Pins View) QVSOP (Q2)
Table Function Table
A0-A7 Hi-Z B0-B7 Hi-Z B0-B7 A8-A15 Hi-Z Hi-Z B8-B15 B8-B15 Function Disconnect Connect Connect Connect
Table Absolute Maximum Ratings
Supply Voltage Ground -0.5V +7.0V Switch Voltage -0.5V +7.0V Input Voltage -0.5V +7.0V Input Voltage (for pulse width 20ns) -3.0V Output Current Max. Sink Current/Pin 120mA Maximum Power Dissipation 70°C 0.92 watts TSTG Storage Temperature -65° +150°C
Note: ABSOLUTE MAXIMUM CONTINUOUS RATINGS those values beyond which damage device occur. Exposure these conditions conditions beyond those indicated adversely affect device reliability. Functional operation under absolute-maximum conditions implied.
Table Capacitance
25°C, 1MHz, VOUT Pins Control Inputs QuickSwitch Channels (Switch OFF) QVSOP Unit
Note: Capacitance guaranteed production tested. total capacitance while switch please Section under "Input Switch Capacitance."
QUALITY SEMICONDUCTOR, INC.
MDSL-00040-03 JULY 1997
QS32X245, QS32X2245 Table Electrical Characteristics Over Operating Range
Commercial: -40°C 85°C, 5.0V Symbol Parameter Input HIGH Voltage Input Voltage Input Leakage Current (Control Inputs) Off-State Current (Hi-Z) Switch Resistance(2) Switch Resistance(2) Pass Voltage(3) Test Conditions Guaranteed Logic HIGH Control Inputs Guaranteed Logic Control Inputs VOUT VCC, Switches Min., 0.0V QS32X245 30mA QS32X2245 Min., 2.4V QS32X245 15mA QS32X2245 IOUT -5µA Typ(1) 0.01 0.01 Unit
Notes: Typical values indicate 5.0V 25°C. diagram explaining procedure measurement, please Section under Electrical Characteristics." guaranteed, production tested. Pass voltage guaranteed, production tested.
Figure Typical Resistance 5.0V (QS32X245)
(ohms)
(Volts)
Note: QS32X2245, shown.
MDSL-00040-03 JULY 1997
QUALITY SEMICONDUCTOR, INC.
QS32X245, QS32X2245 Table Power Supply Characteristics Over Operating Range
-40°C 85°C, 5.0V Symbol ICCQ QCCD Parameter Quiescent Power Supply Current Power Supply Current Control Input HIGH(2) Dynamic Power Supply Current MHz(3) Test Conditions(1) Max., VCC, Max., 3.4V, Max., Pins Open, Control Input Toggling Duty Cycle 0.25 Unit
Notes: conditions shown Min. Max., appropriate values specified under specifications. driven input (VIN 3.4V). pins contribute ICC. This current applies control inputs only represents current required switch internal capacitance specified frequency. inputs generate significant currents they change states. This parameter guaranteed, production tested.
Table Switching Characteristics Over Operating Range
-40°C 85°C, 5.0V CLOAD 50pF, RLOAD unless otherwise noted. Symbol tPLH tPHL tPZL tPZH tPLZ tPHZ Description
(2,3)
QS32X245 QS32X2245 QS32X245 QS32X2245 QS32X245 QS32X2245
0.25 1.25(3)
Unit
Data Propagation Delay to/from Switch Turn-on Delay An/Bn Switch Turn-off Delay(2) An/Bn
Notes: Test Circuit Waveforms. Minimums guaranteed production tested. This parameter guaranteed, production tested. switch contributes propagation delay other than delay resistance switch load capacitance. time constant switch alone order 0.25ns QS32X245 1.25ns Q532x2245 50pF. Since this time constant much smaller than rise/fall times typical driving signals, adds very little propagation delay system. Propagation delay switch when used system determined driving circuit driving side switch interaction with load driven side.
QUALITY SEMICONDUCTOR, INC.
MDSL-00040-03 JULY 1997

QUALITY SEMICONDUCTOR, INC. QuickSwitch® Products High-Speed CMOS

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