IDTQS3251 HIGH-SPEED CMOS QUICKSWITCH 8:1 MUX/DEMUX INDUSTRIAL TEMPERATURE RANGE QUICKSWITCH® PRODUCTS HIGH-SPEED CMOS QUICKSWITCH 8:1 MUX/DEMUX FEATURES: • • • • • • • IDTQS3251 DESCRIPTION: Enhanced N channel FET with no inherent diode to Vcc Ω bidirectional switches connect inputs to outputs 5Ω Pin compatible with the 74F251, 74FCT251, and 74FCT251T Zero propagation delay, zero ground bounce Undershoot clamp diodes on all switch and control inputs TTL-compatible control inputs Available in SOIC and QSOP packages The QS3251 is a high-speed CMOS TTL-compatible 8:1 multiplexer/ demultiplexer. The QS3251 has 3-state outputs. The QS3251 is a function and pinout compatible version of the 74F251, 74FCT251 and the 74ALS/ AS/LS251 8:1 multiplexers. The low ON resistance of the QS3251 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 QS3251 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) FUNCTIONAL BLOCK DIAGRAM S0 S1 S2 E I0 I1 I2 I3 Y I4 I5 I6 I7 The IDT logo is a registered trademark of Integrated Device Technology, Inc. INDUSTRIAL TEMPERATURE RANGE FEBRUARY 2000 1 c 2000 Integrated Device Technology, Inc. DSC-5754/1 IDTQS3251 HIGH-SPEED CMOS QUICKSWITCH 8:1 MUX/DEMUX INDUSTRIAL TEMPERATURE RANGE PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS(1) Symbol Description VTERM(2) Max Unit VTERM(3) Supply Voltage to Ground –0.5 to +7 V 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 mA I3 1 16 VCC I2 2 15 I4 IOUT DC Output Current 120 PMAX Maximum Power Dissipation (TA = 85°C) 0.5 W I1 3 14 I5 TSTG Storage Temperature –65 to +150 °C I0 4 13 I6 Y 5 12 I7 NC 6 11 S0 E 7 10 S1 GND 8 9 S2 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 = 1MHz, VIN = 0V, VOUT = 0V) Pins Typ. Max. (1) Unit Control Inputs 4 5 pF 5 21 7 23 pF Quickswitch Channels (Switch OFF) SOIC/ QSOP TOP VIEW Demux Mux NOTE: 1. This parameter is guaranteed but not production tested. FUNCTION TABLE(1) PIN DESCRIPTION Pin Names I/O I0 - I7 I Data Inputs S0 - S2 I Select Inputs E I Enable Input Y O Data Output Select Description E S2 S1 S0 Y Function H X X X Hi-Z Disable L L L L I0 S2 - S 0 = 0 L L L H I1 S2 - S 0 = 1 L L H L I2 S2 - S 0 = 2 L L H H I3 S2 - S 0 = 3 L H L L I4 S2 - S 0 = 4 L H L H I5 S2 - S 0 = 5 L H H L I6 S2 - S 0 = 6 L H H H I7 S2 - S 0 = 7 NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level X = Don’t Care Z = High-Impedence 2 IDTQS3251 HIGH-SPEED CMOS QUICKSWITCH 8:1 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 Min. Typ.(1) Max. Unit 2 — — V VIH Input HIGH Level Guaranteed Logic HIGH for Control Pins VIL Input LOW Level Guaranteed Logic LOW for Control Pins — — 0.8 V IIN Input LeakageCurrent (Control Inputs) 0V ≤ VIN ≤ VCC — — ±1 µA IOZ Off-State Output Current (Hi-Z) 0V ≤ VOUT ≤ VCC — — ±1 µA RON Switch ON Resistance(2) Pass Voltage(3) — — 3.7 5 10 4 7 15 4.2 Ω VP VCC = Min., VIN = 0V, ION = 30mA VCC = Min., VIN = 2.4V, ION =15mA VIN = VCC = 5V, IOUT = -5µA NOTES: 1. Typical values are at VCC = 5.0V, TA = 25°C. 2. RON is guaranteed but not production tested. 3. Pass Voltage is guaranteed but not production tested. TYPICAL ON RESISTANCE vs VIN AT VCC = 5V R ON (ohms) 16 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 IDTQS3251 HIGH-SPEED CMOS QUICKSWITCH 8:1 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 tPZL Switch Turn-on Delay tPZH Sx to Y tPZL Switch Turn-on Delay tPZH E to Y tPLZ Switch Turn-off Delay (2) tPHZ E to Y, Sx to Y Min. (1) Typ. Max. Unit — — 0.25 ns 0.5 — 6.6 ns 0.5 — 6 ns 0.5 — 6 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 IDTQS3251 HIGH-SPEED CMOS QUICKSWITCH 8:1 MUX/DEMUX INDUSTRIAL TEMPERATURE RANGE ORDERING INFORMATION IDTQS XXXXX Device Type XX Package CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 S1 Q Small Outline IC Quarter Size Outline Package 3251 High Speed CMOS Quickswitch 8:1 Mux/Demux 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