SN74ALS563B是TI公司的一款D类锁存器产品，SN74ALS563B是具有三态输出的八路 D 类透明锁存器，本页介绍了SN74ALS563B的产品说明、应用、特性等，并给出了与SN74ALS563B相关的TI元器件型号供参考。
SN74ALS563B - 具有三态输出的八路 D 类透明锁存器 - D类锁存器 - 触发器/锁存器/寄存器 - TI公司（Texas Instruments，德州仪器）
These 8-bit D-type transparent latches feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. They are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.
While the latch-enable (LE) input is high, the Q outputs follow the complements of data (D) inputs. When LE is taken low, the outputs are latched at the inverses of the levels set up at the D inputs.
A buffered output-enable (OE)\ input places the eight outputs in either a normal logic state (high or low logic levels) or a high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and increased high logic level provide the capability to drive bus lines without interface or pullup components.
OE\ does not affect internal operations of the latches. Old data can be retained or new data can be entered while the outputs are in the high-impedance state.
- 3-State Buffer-Type Outputs Drive Bus Lines Directly
- Bus-Structured Pinout
