IDTQS3251 HIGH-SPEED CMOS QUICKSWITCH 8:1 MUX/DEMUX INDUSTRIAL TEMPERATURE RANGE QUICKSWITCH(R) PRODUCTS HIGH-SPEED CMOS QUICKSWITCH 8:1 MUX/DEMUX IDTQS3251 FEATURES: DESCRIPTION: - - - - - - - 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. Enhanced N channel FET with no inherent diode to Vcc 5 bidirectional switches connect inputs to outputs 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 QSOP and SOIC Packages Mux/Demux devices provide an order of magnitude faster speed than equivalent logic devices. APPLICATIONS - - - - The QS3251 is characterized for operation at -40C to +85C. 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 INDUSTRIAL TEMPERATURE RANGE FEBRUARY 2000 1 c 1999 Integrated Device Technology, Inc. DSC-5754/- IDTQS3251 HIGH-SPEED CMOS QUICKSWITCH 8:1 MUX/DEMUX INDUSTRIAL TEMPERATURE RANGE ABSOLUTE MAXIMUM RATINGS (1) PIN CONFIGURATION Symbol I3 1 16 VCC I2 2 15 I4 I1 3 14 I5 13 I6 12 I7 6 11 S0 E 7 10 S1 G ND 8 9 S2 I0 4 Y 5 NC SO 16-1 SO 16-7 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 (T A = 85C) 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. CAPACITANCE (TA = +25OC, f = 1.0MHz, VIN = 0V, VOUT = 0V) SOIC/ QSOP TOP VIEW Pins Control Pins Typ. 4 Max. (1) 5 Unit pF Quickswitch Channels Demux 5 7 pF (Switch OFF) Mux 21 23 pF NOTE: 1. This parameter is guaranteed but not production tested. PIN DESCRIPTION Pin Names I0 - I7 I/O I S0 - S2 I Select Inputs E I Enable Input Y O FUNCTION TABLE(1) Description Data Inputs Select Data Output 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 = -40C to +85C, VCC = 5.0V 5% Typ.(1) -- Max. -- -- -- 0.8 V -- -- 1 A -- 1 A 5 7 10 15 4.2 V Symbol VIH Parameter Input HIGH Voltage Test Conditions Guaranteed Logic HIGH for Control Pins Min. 2 VIL Input LOW Voltage Guaranteed Logic LOW for Control Pins IIN Input Leakage Current (Control Inputs) (2) 0V VIN Vcc IOZ Off-State Current (Hi-Z) 0V VOUT Vcc -- RON Switch ON Resistance Vcc = Min., VIN = 0V, ION = 30mA -- RON Switch ON Resistance Vcc = Min., VIN = 2.4V, ION = 15mA -- VP Pass Voltage (2) VIN = Vcc = 5V, IOUT = -5A 3.7 4 NOTES: 1. Typical values are at VCC = 5.0V, TA = 25C. 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 Unit V IDTQS3251 HIGH-SPEED CMOS QUICKSWITCH 8:1 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 A 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 = -40C to +85C, VCC = 5.0V 5% CLOAD = 50pF, RLOAD = 500 unless otherwise noted. Symbol tPLH tPHL tPZL tPZH tPZL tPZH tPLZ tPHZ Parameter Data Propagation Delay (2,3) In to Y Switch Turn-on Delay Sn to Y Switch Turn-on Delay E to Y Switch Turn-off Delay (2) E to Y, Sn 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 ID TQS XXXXX XX Device Type Package S1 Q Small Outline IC (SO16-1) Quarter Size Outline Package (SO16-7) 3251 High Speed CMOS Quickswitch 8:1 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* *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. The IDT logo, QuickSwitch, and SynchroSwitch are registered trademarks of Integrated Device Technology, Inc. 5