SN74ALS873BDW集成电路（IC）的锁存器规格书PDF中文资料

SN74ALS873BDW属于集成电路（IC）的锁存器。由德州仪器制造生产的SN74ALS873BDW锁存器锁存器是类似于触发器的基本数字存储设备，但是不同之处在于，在锁存使能（或类似命名）信号处于有效逻辑状态的任何时间，保持的逻辑状态都可以改变。“透明”锁存器还允许设备输出在锁存使能信号有效时反映输入的当前状态，而相反的是，状态仅在保持状态已固定时改变。

3-State Buffer-Type Outputs Drive Bus

Lines Directly

Bus-Structured Pinout

Package Options Include Plastic

Small-Outline (DW) Packages, Ceramic

Chip Carriers (FK), and Plastic (NT) and

Ceramic (JT) DIPs

description

These dual 4-bit D-type latches feature 3-state

outputs designed specifically for bus driving.

These devices are particularly suitable for

implementing buffer registers, I/O ports,

bidirectional bus drivers, and working registers.

The dual 4-bit latches are transparent D-type

latches. While the latch-enable (LE) input is high,

the Q outputs follow the data (D) inputs in true

form, according to the function table. When LE is

low, the outputs are latched. When the clear (CLR)

input goes low, the Q outputs go low

independently of LE. The outputs are in the

high-impedance state when the output-enable

(OE) input is at a high logic level.

The SN54ALS873B and SN54AS873A are

characterized for operation over the full military

temperature range of −55°C to 125°C. The

SN74ALS873B and SN74AS873A are

characterized for operation from 0°C to 70°C.