IDTQS32257 HIGH-SPEED CMOS QUICKSWITCH QUAD 2:1 MUX/DEMUX INDUSTRIAL TEMPERATURE RANGE QUICKSWITCH® PRODUCTS HIGH-SPEED CMOS QUICKSWITCH QUAD 2:1 MUX/DEMUX DESCRIPTION: FEATURES: − − − − − − − − Enhanced N channel FET with no inherent diode to Vcc 5Ω bidirectional switches connect inputs to outputs 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 25Ω resistors for low noise Available in SOIC, QSOP, and S1 Packages The QS32257 is a high-speed CMOS LVTTL-compatible Quad 2:1 multiplexer/demultiplexer. The QS32257 is a function and pinout compatible QuickSwitch version of the 74F257, 74FCT257, and the 74ALS/AS/LS257 Quad 2:1 multiplexers. The QS32257 has 25Ω series resistors to reduce ground noise. Mux/Demux devices provide an order of magnitude faster speed than equivalent logic devices. The QS32257 is characterized for operation at -40°C to +85°C. APPLICATIONS − − − − − IDTQS32257 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 INDUSTRIAL TEMPERATURE RANGE AUGUST 2001 1 c 2001 Integrated Device Technology, Inc. DSC-5750/1 IDTQS32257 HIGH-SPEED CMOS QUICKSWITCH QUAD 2:1 MUX/DEMUX INDUSTRIAL TEMPERATURE RANGE PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS Symbol S 1 16 I0A 2 15 I1A 3 14 V CC E I0D I1D 6 SO 16-1 13 SO 16-7 SO 16-8 12 11 YB 7 10 I1C G ND 8 9 YC YA 4 I0B 5 I1B (1) VTERM(2) Description Supply Voltage to Ground Max. – 0.5 to +7 Unit 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 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. YD I0C CAPACITANCE (TA = +25OC, f = 1.0MHz, VIN = 0V, VOUT = 0V) Pins Control Pins QSOP/ SOIC/ S1 TOP VIEW Typ. 4 Max. (1) 5 Unit pF Quickswitch Channels Demux 5 7 pF (Switch OFF) Mux 8 9 pF NOTE: 1. This parameter is guaranteed but not production tested. PIN DESCRIPTION Pin Names Ixx I/O I Description Data Inputs S I Select Input E I Enable Input YA - YD O Data Outputs FUNCTION TABLE(1) Enable Outputs E S S1 S0 YA YB Function 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-Impedence 2 IDTQS32257 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 VIH Parameter Input HIGH Voltage Test Conditions Guaranteed Logic HIGH for Control Pins Min. 2 Typ.(1) — Max. — Unit V VIL Input LOW Voltage Guaranteed Logic LOW for Control Pins — — 0.8 V 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 20 28 40 Ω RON Switch ON Resistance Vcc = Min., VIN = 2.4V, ION = 15mA 20 35 48 Ω VP Pass Voltage (2) VIN = Vcc = 5V, IOUT = -5µA 3.7 4 4.2 V 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 80 R ON (ohms) 70 60 50 40 30 20 10 0 0.0 0.5 1.0 1.5 2.0 V IN (Volts) 3 2.5 3.0 3.5 IDTQS32257 HIGH-SPEED CMOS QUICKSWITCH QUAD 2:1 MUX/DEMUX INDUSTRIAL TEMPERATURE RANGE POWER SUPPLY CHARACTERISTICS Symbol ICCQ Parameter Quiescent Power Supply Current Test Conditions(1) VCC = Max., VIN = GND or Vcc, f = 0 ∆ICC Power Supply Current per Control Input HIGH (2) ICCD Dynamic Power Supply Current per MHz(3) Max. 3 Unit µA VCC = Max., VIN = 3.4V, f = 0 1.5 mA VCC = Max., I and Y pins open Control Inputs Toggling at 50% Duty Cycle 0.25 mA/MHz 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 tPLH tPHL tPZH tPZL tPZH tPZL tPHZ tPLZ Parameter Data Propagation Delay (2,3) In to Y Switch Turn-on Delay Sn to Y Switch Turn-on Delay EN to Y Switch Turn-off Delay (2) EN to Y, Sn to Y Min. (1) Typ. — — 0.5 — 6.2 ns 0.5 — 5.8 ns 0.5 — 5 ns Max. 1.25 (3) Unit 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 1.25ns 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 IDTQS32257 HIGH-SPEED CMOS QUICKSWITCH QUAD 2:1 MUX/DEMUX INDUSTRIAL TEMPERATURE RANGE ORDERING INFORMATION IDTQS XXXXX XX Device Type Package SO Q S1 Small Outline IC (SO16-1) Quarter Size Outline Package (SO16-7) Quarter Size Outline Package (SO16-8) 32257 High Speed C MOS Quicksw itch 8-Bit Bus Switch 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* *To search for sales office near you, please click the sales button found on our home page or dial the 800# above and press 2. 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