74HC258DB集成電路（IC）的信號開關多路復用器解碼器規(guī)格書PDF中文資料

General description

The 74HC258 is a high-speed Si-gate CMOS device and is pin compatible with low power Schottky TTL (LSTTL). The 74HC258 is specified in compliance with JEDEC standard no. 7A.

The 74HC258 has four identical 2-input multiplexers with 3-state outputs, which select 4 bits of data from two sources and is controlled by a common data select input (S).

The data inputs from source 0 (1I0 to 4I0) are selected when input S is LOW and the data inputs from source 1 (1I1 to 4I1) are selected when S is HIGH. Data appears at the outputs (1Y to 4Y) in inverted form from the select inputs.

The 74HC258 is the logic implementation of a 4-pole, 2-position switch, where the position of the switch is determined by the logic levels applied to S. The outputs are forced to a high-impedance OFF-state when OE is HIGH.

Features

■ 3-state outputs interface directly with system bus

■ Low-power dissipation

■ Inverting data path

■ Complies with JEDEC standard no. 7A

■ ESD protection:

◆ HBM JESD22-A114E exceeds 2000 V

◆ MM JESD22-A115-A exceeds 200 V

■ Multiple package options

■ Specified from ?40 °C to +85 °C and from ?40 °C to +125 °C.