HD74HC257
Quad.
2-to-1-line Data Selectors/Multiplexers (with noninverted 3-state outputs)
REJ03D0601–0200 (Previous ADE-205-478)
Rev.
2.
00 Jan 31, 2006
Description
The large output drive capability coupled with the 3-state feature make this device ideal for interfacing with bus lines in a bus organized system.
When the output control input line is taken high, the outputs of all four multiplexers are sent into a high impedance state.
When the output control line is low, the select input chooses whether the A or B input is used.
Features
• High Speed Operation: tpd (Data to Y) = 10.
5 ns typ (CL = 50 pF) • High Output Current: Fanout of 15 LSTTL Loads
• Wide Operating
Voltage: VCC = 2 to ...