QuickSwitch® Products High-Speed CMOS QuickSwitch 16-Bit Resistance Mu
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QS32XR245
QuickSwitch® Products High-Speed CMOS QuickSwitch 16-Bit Resistance MultiWidthBus Switches
Enhanced channel with inherent diode bidirectional switches connect inputs outputs Zero propagation delay, zero ground bounce QS32XR245Q3 16-bit version QS3R245 Flow-through pinout easy layout Undershoot clamp diodes switch control inputs TTL-compatible control inputs Available 40-pin QVSOP package (Q2)
QS32XR245
DESCRIPTION
QS32XR245 member MultiWidthfamily QuickSwitch devices provides high-speed resistance CMOS compatible switches flow-thru pinout. This device available MillipaQ package, worlds first small outline 16-bit solution. on-resistance QS32XR245 allows inputs connected outputs without adding propagation delay without generating additional ground bounce noise. When Output Enable (OEn) low, switches turned connecting When high, switches turned off. This device ideally suited 16/32 applications where board space premium.The resistance QS32XR245 makes ideal docking application. QuickSwitch devices provide order magnitude faster speed than conventional logic devices.
APPLICATIONS
resistance applications Hot-docking, hot-swapping (Application Note AN-13) (low resistance PCI, compact PCI) switching, isolation Logic replacement (data processing) Capacitance isolation, reduction Power conservation, clock gating Voltage translation 3.3V; Application Note AN-11)
Figure Functional Block Diagram
MDSL-00268-01 NOVEMBER 1998
QUALITY SEMICONDUCTOR, INC.
QS32XR245 Table Description
Name OE1, Description Output Enable QVSOP (Q2)
Figure Configuration (All Pins View)
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-00268-01 NOVEMBER 1998
QS32XR245 Table Electrical Characteristics Over Operating Range
-40°C 85°C, 5.0V ±10% 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 30mA Min., 2.4V 15mA 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 (QS32XR245)
(ohms)
(Volts)
MDSL-00268-01 NOVEMBER 1998
QUALITY SEMICONDUCTOR, INC.
QS32XR245 Table Power Supply Characteristics Over Operating Range
-40°C 85°C, 5.0V ±10% 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 ±10% CLOAD 50pF, RLOAD unless otherwise noted. Symbol tPLH tPHL Description(1) Data Propagation Delay(2,3) Switch Turn-on Delay An,Bn Switch Turn-off Delay(2) An,Bn
0.12(3)
Unit
tPZH tPZL tPHZ tPLZ
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 .12ns QS32XR245 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-00268-01 NOVEMBER 1998
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