74LS253中文资料仙童半导体数据手册PDF规格书

General Description

Each of these Schottky-clamped data selectors/multiplexers contains inverters and drivers to supply fully comple

mentary, on-chip, binary decoding data selection to the AND-OR gates. Separate output control inputs are pro

vided for each of the two four-line sections.

特性 Features

■3-STATE version of DM74LS153 with same pinout

■Schottky-diode-clamped transistors

■Permit multiplexing from N-lines to one line

■Performs parallel-to-serial conversion

■Strobe/output control

■High fanout totem-pole outputs

■Typical propagation delay

Data to output 12 ns

Select to output 21 ns

■Typical power dissipation 35 mW