IDTQS3257 HIGH-SPEED CMOS QUICKSWITCH QUAD 2:1 MUX/DEMUX INDUSTRIAL TEMPERATURE RANGE QUICKSWITCH® PRODUCTS HIGH-SPEED CMOS QUICKSWITCH QUAD 2:1 MUX/DEMUX FEATURES: • • • • • • • IDTQS3257 DESCRIPTION: Enhanced N channel FET with no inherent diode to Vcc Ω bidirectional switches connect inputs to outputs 5Ω Pin compatible with the 74F257, 74FCT257, and 74FCT257T Zero propagation delay, zero ground bounce Undershoot clamp diodes on all switch and control inputs TTL-compatible control inputs Available in SOIC, QSOP, and S1 packages The QS3257 is a high-speed CMOS LVTTL-compatible Quad 2:1 multiplexer/demultiplexer. The QS3257 is a function and pinout compatible QuickSwitch version of the 74F257, 74FCT257, and the 74ALS/AS/LS257 Quad 2:1 multiplexers. The low ON resistance of the QS3257 allows inputs to be connected to outputs without adding propagation delay and without generating additional ground bounce noise. Mux/Demux devices provide an order of magnitude faster speed than equivalent logic devices. The QS3257 is characterized for operation at -40°C to +85°C. APPLICATIONS: • • • • • Logic replacement Video, audio, graphics switching, muxing Hot-swapping, hot-docking Voltage translation (5V to 3.3V) Bus funneling FUNCTIONAL BLOCK DIAGRAM S E I0A YA I1A I0B YB I1B I0C YC I1C I0D YD I1D The IDT logo is a registered trademark of Integrated Device Technology, Inc. INDUSTRIAL TEMPERATURE RANGE FEBRUARY 2001 1 c 2001 Integrated Device Technology, Inc. DSC-5756/6 IDTQS3257 HIGH-SPEED CMOS QUICKSWITCH QUAD 2:1 MUX/DEMUX ABSOLUTE MAXIMUM RATINGS(1) PIN CONFIGURATION S 1 16 VCC I0A 2 15 I1A YA 3 14 E I0D 4 13 I0B 5 12 I1D YD I1B YB GND 6 11 I0C 7 10 9 I1C YC 8 INDUSTRIAL TEMPERATURE RANGE Symbol Description Max Unit VTERM(2) Supply Voltage to Ground –0.5 to +7 V VTERM(3) DC Switch Voltage Vs –0.5 to +7 V VTERM(3) DC Input Voltage VIN –0.5 to +7 V VAC AC Input Voltage (pulse width ≤ 20ns) –3 V IOUT DC Output Current 120 mA PMAX Maximum Power Dissipation (TA = 85°C) TSTG Storage Temperature 0.5 W –65 to +150 °C NOTE: 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 = 1.0MHZ, VIN = 0V, VOUT = 0V) SOIC/ QSOP/ S1 TOP VIEW Pins Typ. Max. (1) Unit Control Pins 4 5 pF pF Quickswitch Channels Demux 5 7 (Switch OFF) Mux 8 9 NOTE: 1. This parameter is measured at characterization but not tested. PIN DESCRIPTION Pin Names I/O Ixx I Description Data Inputs S I Select Input E I Enable Input YA - YD O Data Outputs FUNCTION TABLE(1) Enable Outputs E S YA YB YC YD H X Hi-Z Hi-Z Hi-Z Hi-Z Disconnected L L I0A I0B I0C I0D Select 0 L H I1A I1B I1C I1D Select 1 NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care Z = High-Impedance 2 Function IDTQS3257 HIGH-SPEED CMOS QUICKSWITCH QUAD 2:1 MUX/DEMUX INDUSTRIAL TEMPERATURE RANGE DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Industrial: TA = –40°C to +85°C, VCC = 5.0V ±5% Symbol Parameter Test Conditions VIH Input HIGH Level Guaranteed Logic HIGH for Control Pins VIL Input LOW Level Guaranteed Logic LOW for Control Pins IIN Input LeakageCurrent (Control Inputs)(2) 0V ≤ VIN ≤ VCC IOZ Off-State Output Current (Hi-Z) RON Switch ON Resistance VP Pass Voltage(2) Min. Typ.(1) Max. Unit 2 — — V — — 0.8 V — — ±1 µA 0V ≤ VOUT ≤ VCC — — ±1 µA VCC = Min., VIN = 0V, ION = 30mA VCC = Min., VIN = 2.4V, ION =15mA VIN = VCC = 5V, IOUT = -5µA — — 3.7 5 10 4 7 15 4.2 Ω NOTES: 1. Typical values are at VCC = 5.0V, TA = 25°C. 2. Pass Voltage is guaranteed but not production tested. TYPICAL ON RESISTANCE vs VIN AT VCC = 5V 16 R ON (ohms) 14 12 10 8 6 4 2 0 0.0 0.5 1.0 1.5 2.0 V IN (Volts) 3 2.5 3.0 3.5 V IDTQS3257 HIGH-SPEED CMOS QUICKSWITCH QUAD 2:1 MUX/DEMUX INDUSTRIAL TEMPERATURE RANGE POWER SUPPLY CHARACTERISTICS Symbol Test Conditions(1) Parameter Max. Unit ICCQ Quiescent Power Supply Current VCC = Max., VIN = GND or Vcc, f = 0 3 µA ∆ICC Power Supply Current per Control Input HIGH (2) VCC = Max., VIN = 3.4V, f = 0 1.5 mA ICCD Dynamic Power Supply Current per MHz(3) VCC = Max., I and Y pins open 0.25 mA/MHz Control Inputs Toggling at 50% Duty Cycle NOTES: 1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics. 2. Per TLL driven input (VIN = 3.4V, control inputs only). I and Y 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 I and Y 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 = 5.0V ± 5%; CLOAD = 50pF, RLOAD = 500Ω unless otherwise noted. Symbol Parameter tPLH Data Propagation Delay (2,3) tPHL Ix to Y tPZH Switch Turn-on Delay tPZL Sx to Y tPZH Switch Turn-on Delay tPZL Ex to Y tPHZ Switch Turn-off Delay (2) tPLZ Ex to Y, Sx to Y Min. (1) Typ. Max. Unit — — 0.25(3) ns 0.5 — 5.2 ns 0.5 — 4.8 ns 0.5 — 5 ns NOTES: 1. Minimums are guaranteed but not production tested. 2. This parameter is guaranteed but not production tested. 3. 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 for 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 IDTQS3257 HIGH-SPEED CMOS QUICKSWITCH QUAD 2:1 MUX/DEMUX INDUSTRIAL TEMPERATURE RANGE ORDERING INFORMATION IDTQS XXXXX Device Type XX Package SO Q S1 S1G Small Outline IC Quarter Size Outline Package Small Outline IC SOIC - Green 3257 High Speed CMOS Quickswitch Quad 2:1 Mux/Demux 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 5 for Tech Support: [email protected] (408) 654-6459