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Details, datasheet, quote on part number:QS3257
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Datasheet text preview:
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:
· · · · · · · Enhanced N channel FET with no inherent diode to Vcc 5 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 Available in SOIC, QSOP, and S1 packages
IDTQS3257
DESCRIPTION:
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 I0 A YA I1 A I0 B YB I1 B I0 C YC I1 C I0 D YD I1 D
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
c 2001 Integrated Device Technology, Inc.
FEBRUARY 2001
1
DSC-5756/4
IDTQS3257 HIGH-SPEED CMOS QUICKSWITCH QUAD 2:1 MUX/DEMUX
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS(1)
Symbol VTERM(2) VTERM(3) Description Supply Voltage to Ground DC Switch Voltage Vs DC Input Voltage VIN AC Input Voltage (pulse width 20ns) DC Output Current Maximum Power Dissipation (TA = 85°C) Storage Temperature Max 0.5 to +7 0.5 to +7 0.5 to +7 3 120 0.5 65 to +150 Unit V V V V mA W °C
S I0A I1A YA I0B I1B YB GND
1 2 3 4 5 6 7 8
SOIC/ QSOP/ S1 TOP VIEW
16 15 14 13 12 11 10 9
VCC E I0D I1D YD I0C I1C YC
VTERM(3) VAC IOUT PMAX TSTG
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
Pins Control Pins Quickswitch Channels (Switch OFF)
(TA = +25°C, f = 1.0MHZ, VIN = 0V, VOUT = 0V)
Typ. 4 Demux Mux 5 8 Max. (1) 5 7 9 Unit pF pF
NOTE: 1 . This parameter is measured at characterization but not tested.
PIN DESCRIPTION
Pin Names Ixx S E YA - YD I/O I I I O Data Inputs Select Input Enable Input Data Outputs Description
FUNCTION TABLE(1)
Enable E H L L S X L H S1 Hi-Z I0A I1A Outputs S0 Hi-Z I0B I1B YA Hi-Z I0C I1C YB Hi-Z I0D I1D Function Disconnected Select 0 Select 1
NOTE: 1 . H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care Z = High-Impedance
2
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 VIH VIL IIN IO Z RON VP Parameter Input HIGH Level Input LOW Level Off-State Output Current (Hi-Z) Switch ON Resistance Pass Voltage(2) Test Conditions Guaranteed Logic HIGH for Control Pins Guaranteed Logic LOW for Control Pins 0V VOUT VCC VCC = Min., VIN = 0V, ION = 30mA VCC = Min., VIN = 2.4V, ION =15mA VIN = VCC = 5V, IOUT = -5µA Min. 2 -- -- -- -- -- 3.7 Typ.(1) -- -- -- -- 5 10 4 Max. -- 0.8 ±1 ±1 7 15 4.2 Unit V V µA µA V
Input LeakageCurrent (Control Inputs)(2) 0V VIN VCC
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
RON (ohms)
14 12 10 8 6 4 2 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
V IN (Volts)
3
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