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KK74HC257A

KODENSHI KOREA
Part Number KK74HC257A
Manufacturer KODENSHI KOREA
Description Quad 2-Input Data Selector/Multiplexer
Published Jul 29, 2011
Detailed Description TECHNICAL DATA KK74HC257A Quad 2-Input Data Selector/Multiplexer with 3-State Outputs High-Performance Silicon-Gate CM...
Datasheet PDF File KK74HC257A PDF File

KK74HC257A
KK74HC257A

Overview
TECHNICAL DATA KK74HC257A Quad 2-Input Data Selector/Multiplexer with 3-State Outputs High-Performance Silicon-Gate CMOS The KK74HC257A is identical in pinout to the LS/ALS257.
The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LS/ALSTTL outputs.
This device selects a (4-bit) nibble from either the A or B inputs as determined by the Select input.
The nibble is presented at the outputs in noninverted from when the Output Enable pin is at a low level.
A high level on the Output Enable pin switches the outputs into the highimpedance state.
• Outputs Directly Interface to CMOS, NMOS, and TTL • Operating Voltage Range: 2.
0 to 6.
0 V • Low Input Current: 1.
0 µA • High Noise Immunity Characteristic of CMOS Devices ORDERING INFORMATION KK74HC257AN Plastic KK74HC257AD SOIC TA = -55° to 125° C for all packages PIN ASSIGNMENT LOGIC DIAGRAM FUNCTION TABLE Inputs Output Enable H L PIN 16 =VCC PIN 8 = GND L Select X L H Outputs Y0-Y3 Z A0...


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