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| IDTQS3800 HIGH-SPEED CMOS 10-BIT QUICKSWITCH WITH PRECHARGED OUTPUTS INDUSTRIAL TEMPERATURE RANGE QUICKSWITCH(R) PRODUCTS HIGH-SPEED CMOS 10-BIT QUICKSWITCH WITH PRECHARGED OUTPUTS 5 bidirectional switches connect inputs to outputs Zero propagation delay, zero ground bounce Undershoot clamp diodes on all switch and control inputs Outputs precharge voltage to minimize signal distortion during live insertion * TTL-compatible input and output levels * Available in SOIC, QSOP, and TSSOP packages * * * * IDTQS3800 FEATURES: DESCRIPTION: The QS3800 is a 10-bit high-speed CMOS bus switch controlled by a single enable (ON) input. When ON is low, the switch is on and port A is connected to port B. When ON is high, the switch between port A and port B is open and port B is precharged to the bias voltage. The low ON resistance (5) of the QS3800 allows inputs to be connected to outputs without adding propagation delay and without generating additional noise. The QS3800 also precharges the B port to a user-selectable bias voltage to minimize live insertion noise, which is useful in VME bus applications. The QS3800 is characterized for operation at -40C to +85C. FUNCTIONAL BLOCK DIAGRAM VBIAS A0 B0 A9 B9 ON The IDT logo is a registered trademark of Integrated Device Technology, Inc. INDUSTRIAL TEMPERATURE RANGE 1 c 2000 Integrated Device Technology, Inc. MAY 2000 DSC-5766/1 IDTQS3800 HIGH-SPEED CMOS 10-BIT QUICKSWITCH WITH PRECHARGED OUTPUTS INDUSTRIAL TEMPERATURE RANGE PIN CONFIGURATION ON A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 GND 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 Vcc B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 VBIAS ABSOLUTE MAXIMUM RATINGS(1) Symbol VTERM(2) VBIAS VTERM(3) VAC IOUT PMAX TSTG Description Supply Voltage to Ground Bias Voltage Range DC Input Voltage VIN AC Input Voltage (pulse width 20ns) DC Output Current Input Clamp Current Maximum Power Dissipation Storage Temperature Max -0.5 to +7 -0.5 to VCC -0.5 to VCC+0.5 -3 120 -50 0.5 -65 to +150 Unit V V V V mA 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 Typ. 3 5 Max. (1) 5 7 Unit pF pF Control Inputs Quickswitch Channels (Switch OFF) SOIC/ QSOP/ TSSOP TOP VIEW NOTE: 1. This parameter is guaranteed but not production tested. PIN DESCRIPTION Pin Names A0 - A9 B0 - B9 ON VBIAS I/O I/O I/O I I Bus A Bus B Bus Switch Enable Bias Voltage Description FUNCTION TABLE(1) ON L H NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level B0 - B9 A0 - A9 VBIAS Function Connect Disconnect 2 IDTQS3800 HIGH-SPEED CMOS 10-BIT QUICKSWITCH WITH PRECHARGED OUTPUTS INDUSTRIAL TEMPERATURE RANGE DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Industrial: TA = -40C to +85C, VCC = 5V 10% Symbol VIH VIL VBIAS IO IIN IOZ RON Parameter Input HIGH Voltage Input LOW Voltage Bias Voltage Bias Current Input Leakage Current (Control Inputs) Off-State Current (Hi-Z) Switch ON Resistance Test Conditions Guaranteed Logic HIGH for Control Pins Guaranteed Logic LOW for Control Pins VCC = 5V VCC = 4.5V, VBIAS = 2.4V, VO = 0, ON = HIGH 0V VIN VCC 0V VOUT VCC VCC = Min., VIN = 0V, ION = 30mA VCC = Min., VIN = 2.4V, ION = 15mA NOTE: 1. Typical values are at VCC = 5V and TA = 25C. Min. 2 -- 1.3 0.25 -- -- -- -- Typ.(1) Max. -- -- -- -- -- -- 5 10 -- 0.8 VCC -- 1 1 7 15 Unit V V V mA A A TYPICAL ON RESISTANCE vs VIN AT VCC = 5V 16 14 RON (ohms) 12 10 8 6 4 2 0 0.0 0.5 1.0 1.5 VIN (Volts) 2.0 2.5 3.0 3.5 3 IDTQS3800 HIGH-SPEED CMOS 10-BIT QUICKSWITCH WITH PRECHARGED OUTPUTS INDUSTRIAL TEMPERATURE RANGE POWER SUPPLY CHARACTERISTICS Symbol ICCQ ICC ICCD Parameter Quiescent Power Supply Current Power Supply Current per Input HIGH(3) Dynamic Power Supply Current per MHz(4) 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, Data Inputs = GND, Control Input Toggling @ 50% Duty Cycle NOTES: 1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics. 2. Typical values are at VCC = 5V and TA = 25C. 3. 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. Typ.(2) 0.2 Max. 3 2.5 0.25 Unit A mA mA/MHz SWITCHING CHARACTERISTICS OVER OPERATING RANGE TA = -40C to +85C, VCC = 5V 10% CLOAD = 50pF, RLOAD = 500 unless otherwise noted. Symbol tPLH tPHL tPZL tPZH tPLZ tPHZ Parameter Data Propagation Delay(1,2) A to B, B to A Switch Turn-On Delay ON to A or B Switch Turn-Off Delay(1) ON to A or B VBIAS = 3V VBIAS = GND VBIAS = 3V VBIAS = GND 1.5 1.5 7.5 6.5 ns ns Test Conditions Min. (1) Typ. 0.25 Max. Unit ns NOTES: 1. This parameter is guaranteed but not production tested. 2. 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 0.25ns 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. 4 IDTQS3800 HIGH-SPEED CMOS 10-BIT QUICKSWITCH WITH PRECHARGED OUTPUTS INDUSTRIAL TEMPERATURE RANGE ORDERING INFORMATION IDTQS XXXXX Device Type XX Package SO Q PA 3800 Small Outline IC Quarter Size Outline Package Thin Shrink Small Outline Package High Speed CMOS 10-Bit QuickSwitch with Precharged Outputs CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 for SALES: 800-345-7015 or 408-727-6116 fax: 408-492-8674 www.idt.com for Tech Support: logichelp@idt.com (408) 654-6459 5 |
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