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

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

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QS34X245, QS34X2245
QUALITY SEMICONDUCTOR, INC.
QuickSwitch® Products High-Speed CMOS QuickSwitch 32-Bit MultiWidthBus Switches
DESCRIPTION
QS34X245 QS34X2245
FEATURES/BENEFITS
Enhanced channel with inherent diode Bidirectional switches connect inputs outputs Zero propagation delay, zero ground bounce QS34X245 32-bit version QS3245 QS34X2245 resistors noise Flow-through pinout easy layout Undershoot clamp diodes switch control inputs TTL-compatible control inputs Available 80-pin MillipaQpackage (Q3)
APPLICATIONS
Hot-docking, hot-swapping application (Application Note AN-13) Voltage translation 3.3V; Application Note AN-11) switching isolation Power conservation Logic replacement (data processing) Capacitance isolation Clock gating
QS34X245 member MultiWidthfamily QuickSwitch devices provides high-speed CMOS compatible switches flow-thru pinout. This device available MillipaQ package, worlds first small outline 32-bit solution. on-resistance QS34X245 allows inputs connected outputs without adding propagation delay without generating additional ground bounce noise. QS34X2245 includes internal resistors reduce reflection noise high speed applications. When Output Enable (OEn) low, switches turned connecting When high, switches turned off. This device ideally suited 32/64 applications where board space premium. QuickSwitch devices provide order magnitude faster speed than conventional logic devices.
Figure Functional Block Diagram
MDSL-00254-00 JULY 1997
QUALITY SEMICONDUCTOR, INC.
QS34X245, QS34X2245 Figure Configuration
(All pins view)
Table Description
Name Description Output Enable Data I/Os Data I/Os
Table Function Table
Function Disconnected
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.1.4 watts TSTG Storage Temperature.-65°C +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) MillipaQ Unit
Note: Capacitance characterized production tested.
QUALITY SEMICONDUCTOR, INC.
MDSL-00254-00 JULY 1997
QS34X245, QS34X2245 Table Electrical Characteristics Over Operating Range
-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 QS34X245 30mA QS34X2245 Min., 2.4V QS34X245 15mA QS34X2245 IOUT -5µA Typ(1) Unit
Notes: Typical values indicate 5.0V 25°C. diagram explaining procedure measurement, please Section under Electrical Characteristics." Max. value guaranteed production tested. Pass Voltage guaranteed, production tested.
Figure Typical Resistance 5.0V (QS34X245)
(ohms)
(Volts)
Note: QS34X2245, shown.
MDSL-00254-00 JULY 1997
QUALITY SEMICONDUCTOR, INC.
QS34X245, QS34X2245 Table Power Supply Characteristics Over Operating Range
-40°C 85°C, 5.0V Symbol ICCQ QCCD Parameter Quiescent Power Supply Current Power Supply Current(2) Control Input HIGH 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, control inputs only). pins contribute ICC. This current applies control inputs only represents current required switch internal capacitance specified frequency. inputs generate significant currents they transition. 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 tPZH tPZL tPHZ tPLZ Description(1) Data Propagation Delay(2,3) Switch Turn-on Delay An,Bn Switch Turn-off Delay(2) An,Bn
0.25(3) 1.25(3)
Unit
QS34X245 QS34X2245 QS34X245 QS34X2245 QS34X245 QS34X2245
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 QS34X245 1.25ns QS34X2245 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-00254-00 JULY 1997

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

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