IDTQS3800 HIGH-SPEED CMOS 10-BIT QUICKSWITCH WITH PRECHARGED OUTPUTS INDUSTRIAL TEMPERATURE RANGE QUICKSWITCH® PRODUCTS HIGH-SPEED CMOS 10-BIT QUICKSWITCH WITH PRECHARGED OUTPUTS IDTQS3800 DESCRIPTION: FEATURES: 5Ω Ω 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 QSOP package 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 (5Ω) 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 -40°C to +85°C. • • • • FUNCTIONAL BLOCK DIAGRAM VBIAS A0 B0 A9 B9 ON The IDT logo is a registered trademark of Integrated Device Technology, Inc. INDUSTRIAL TEMPERATURE RANGE JANUARY 2004 1 c 2004 Integrated Device Technology, Inc. DSC-5766/2 IDTQS3800 HIGH-SPEED CMOS 10-BIT QUICKSWITCH WITH PRECHARGED OUTPUTS INDUSTRIAL TEMPERATURE RANGE ABSOLUTE MAXIMUM RATINGS(1) PIN CONFIGURATION ON 1 24 A0 2 23 Vcc B0 A1 3 22 B1 A2 4 21 B2 A3 5 20 B3 A4 6 19 B4 A5 7 18 B5 A6 8 17 B6 A7 9 16 B7 A8 10 15 B8 A9 11 14 B9 GND 12 13 VBIAS Symbol Description VTERM(2) Max Unit VBIAS Supply Voltage to Ground –0.5 to +7 V Bias Voltage Range –0.5 to VCC V VTERM(3) DC Input Voltage VIN –0.5 to VCC+0.5 V VAC AC Input Voltage (pulse width ≤20ns) –3 V IOUT DC Output Current 120 mA Input Clamp Current –50 mA PMAX Maximum Power Dissipation 0.5 W TSTG Storage Temperature –65 to +150 °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 = +25°C, f = 1MHz, VIN = 0V, VOUT = 0V) Pins QSOP TOP VIEW Typ. Max. (1) Unit Control Inputs 3 5 pF Quickswitch Channels (Switch OFF) 5 7 pF NOTE: 1. This parameter is guaranteed but not production tested. PIN DESCRIPTION Pin Names I/O A0 - A 9 I/O Bus A Description B0 - B 9 I/O Bus B ON I Bus Switch Enable VBIAS I Bias Voltage FUNCTION TABLE(1) ON B0 - B9 Function L A0 - A9 Connect H VBIAS Disconnect NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level 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 = –40°C to +85°C, VCC = 5V ± 10% Symbol Parameter VIH Input HIGH Voltage VIL Test Conditions Min. Guaranteed Logic HIGH for Control Pins Typ.(1) Max. 2 — Unit — V Input LOW Voltage Guaranteed Logic LOW for Control Pins — — 0.8 V VBIAS Bias Voltage VCC = 5V 1.3 — VCC V IO Bias Current VCC = 4.5V, VBIAS = 2.4V, VO = 0, ON = HIGH 0.25 — — mA IIN Input Leakage Current (Control Inputs) 0V ≤ VIN ≤ VCC — — ±1 µA IOZ Off-State Current (Hi-Z) 0V ≤ VOUT ≤ VCC — — ±1 µA RON Switch ON Resistance VCC = Min., VIN = 0V, ION = 30mA — 5 7 Ω VCC = Min., VIN = 2.4V, ION = 15mA — 10 15 NOTE: 1. Typical values are at VCC = 5V and TA = 25°C. TYPICAL ON RESISTANCE vs VIN AT VCC = 5V 16 14 R ON (ohms) 12 10 8 6 4 2 0 0.0 0.5 1.0 1.5 2.0 VIN (Volts) 3 2.5 3.0 3.5 IDTQS3800 HIGH-SPEED CMOS 10-BIT QUICKSWITCH WITH PRECHARGED OUTPUTS INDUSTRIAL TEMPERATURE RANGE POWER SUPPLY CHARACTERISTICS Symbol Test Conditions(1) Parameter Typ.(2) Max. Unit ICCQ Quiescent Power Supply Current VCC = Max., VIN = GND or VCC, f = 0 0.2 3 µA ∆ICC Power Supply Current per Input HIGH(3) VCC = Max., VIN = 3.4V, f = 0 2.5 mA ICCD Dynamic Power Supply Current per MHz(4) VCC = Max., A and B Pins Open, Data Inputs = GND, 0.25 mA/MHz 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 = 25°C. 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. SWITCHING CHARACTERISTICS OVER OPERATING RANGE TA = -40°C to +85°C, VCC = 5V ± 10% CLOAD = 50pF, RLOAD = 500Ω unless otherwise noted. Symbol Parameter Test Conditions Min. (1) Typ. Max. Unit 0.25 ns tPLH tPHL Data Propagation Delay(1,2) tPZL tPZH Switch Turn-On Delay ON to A or B VBIAS = 3V VBIAS = GND 1.5 7.5 ns tPLZ tPHZ Switch Turn-Off Delay(1) ON to A or B VBIAS = 3V VBIAS = GND 1.5 6.5 ns A to B, B to A 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 CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 Q Quarter Size Outline Package 3800 High Speed CMOS 10-Bit QuickSwitch with Precharged Outputs for SALES: 800-345-7015 or 408-727-6116 fax: 408-492-8674 www.idt.com 5 for Tech Support: [email protected] (408) 654-6459