SN74ALS873BDW屬于集成電路（IC）的鎖存器。由美國(guó)德州儀器公司制造生產(chǎn)的SN74ALS873BDW鎖存器鎖存器是類似于觸發(fā)器的基本數(shù)字存儲(chǔ)設(shè)備，但是不同之處在于，在鎖存使能（或類似命名）信號(hào)處于有效邏輯狀態(tài)的任何時(shí)間，保持的邏輯狀態(tài)都可以改變?！巴该鳌辨i存器還允許設(shè)備輸出在鎖存使能信號(hào)有效時(shí)反映輸入的當(dāng)前狀態(tài)，而相反的是，狀態(tài)僅在保持狀態(tài)已固定時(shí)改變。

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.