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CD74HC257

High-Speed CMOS Logic Quad 2-Input Multiplexer with Three-State Non-Inverting Outputs

Features ?BufferedInputs ?TypicalPropagationDelay(IntoOutput)=12nsat VCC=5V,CL=15pF,TA=25oC ?Fanout(OverTemperatureRange) -StandardOutputs...............10LSTTLLoads -BusDriverOutputs.............15LSTTLLoads ?WideOperatingT

CD74HC257

具有同向三態(tài)輸出的高速 CMOS 邏輯四路 2 輸入多路復用器; ? Buffered Inputs? Typical Propagation Delay (In to Output) = 12ns at VCC = 5V, CL = 15pF, TA = 25°C\n? Fanout (Over Temperature Range) \n - Standard Outputs...10 LSTTL Loads\n? Bus Driver Outputs...15 LSTTL Loads\n? Wide Operating Temperature Range...?55°C to 125°C\n? Balanced Propagation Delay and Transition Times\n? Significant Power Reduction Compared to LSTTL Logic ICs\n? HC Types \n - 2V to 6V Operation\n? High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V\n? HCT Types \n - 4.5V to 5.5V Operation\n? Direct LSTTL Input Logic Compatibility, VIL = 0.8V (Max), VIH = 2V (Min)\n? CMOS Input Compatibility, Il 1μA at VOL, VOH\nData sheet acquired from Harris Semiconductor;

The ?HC257 and ?HCT257 are quad 2-input multiplexers which select four bits of data from two sources under the control of a common Select Input (S). The Output Enable input (OE\\) is active LOW. When OE\\ is HIGH, all of the outputs (1Y-4Y) are in the high impedance state regardless of all other input conditions.\n Moving data from two groups of registers to four common output buses is a common use of the 257. The state of the Select input determines the particular register from which the data comes. It can also be used as a function generator.\n \n

CD74HC257

High Speed CMOS Logic Quad 2-Input Multiplexer with Three-State Non-Inverting Outputs

CD74HC257

High-Speed CMOS Logic Quad 2-Input Multiplexer with Three-State Non-Inverting Outputs

CD74HC257E

Marking：CD74HC257E；Package：PDIP；High-Speed CMOS Logic Quad 2-Input Multiplexer with Three-State Non-Inverting Outputs

Features ?BufferedInputs ?TypicalPropagationDelay(IntoOutput)=12nsat VCC=5V,CL=15pF,TA=25oC ?Fanout(OverTemperatureRange) -StandardOutputs...............10LSTTLLoads -BusDriverOutputs.............15LSTTLLoads ?WideOperatingT

CD74HC257E.A

Marking：CD74HC257E；Package：PDIP；High-Speed CMOS Logic Quad 2-Input Multiplexer with Three-State Non-Inverting Outputs

Features ?BufferedInputs ?TypicalPropagationDelay(IntoOutput)=12nsat VCC=5V,CL=15pF,TA=25oC ?Fanout(OverTemperatureRange) -StandardOutputs...............10LSTTLLoads -BusDriverOutputs.............15LSTTLLoads ?WideOperatingT

CD74HC257M

Marking：HC257M；Package：SOIC；High-Speed CMOS Logic Quad 2-Input Multiplexer with Three-State Non-Inverting Outputs

Features ?BufferedInputs ?TypicalPropagationDelay(IntoOutput)=12nsat VCC=5V,CL=15pF,TA=25oC ?Fanout(OverTemperatureRange) -StandardOutputs...............10LSTTLLoads -BusDriverOutputs.............15LSTTLLoads ?WideOperatingT

CD74HC257M96

Marking：HC257M；Package：SOIC；High-Speed CMOS Logic Quad 2-Input Multiplexer with Three-State Non-Inverting Outputs

Features ?BufferedInputs ?TypicalPropagationDelay(IntoOutput)=12nsat VCC=5V,CL=15pF,TA=25oC ?Fanout(OverTemperatureRange) -StandardOutputs...............10LSTTLLoads -BusDriverOutputs.............15LSTTLLoads ?WideOperatingT

CD74HC257M96.A

Marking：HC257M；Package：SOIC；High-Speed CMOS Logic Quad 2-Input Multiplexer with Three-State Non-Inverting Outputs

Features ?BufferedInputs ?TypicalPropagationDelay(IntoOutput)=12nsat VCC=5V,CL=15pF,TA=25oC ?Fanout(OverTemperatureRange) -StandardOutputs...............10LSTTLLoads -BusDriverOutputs.............15LSTTLLoads ?WideOperatingT

CD74HC257MT

High-Speed CMOS Logic Quad 2-Input Multiplexer with Three-State Non-Inverting Outputs

Features ?BufferedInputs ?TypicalPropagationDelay(IntoOutput)=12nsat VCC=5V,CL=15pF,TA=25oC ?Fanout(OverTemperatureRange) -StandardOutputs...............10LSTTLLoads -BusDriverOutputs.............15LSTTLLoads ?WideOperatingT