SN54HC573A - 具有三态输出的八路 D 类透明锁存器

SN54HC573A是TI德州仪器公司的一款D类锁存器产品，SN54HC573A是具有三态输出的八路 D 类透明锁存器，本站介绍了SN54HC573A的封装应用图解、特点和优点、功能等，并给出了与SN54HC573A相关的TI元器件型号供参考。

SN54HC573A - 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 - 德州仪器

产品描述

These octal transparent D-type 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 respond to the data (D) inputs. When LE is low, the outputs are latched to retain the data that was set up.

A buffered output-enable (OE)\ input can be used to place the eight outputs in either a normal logic state (high or low logic levels) or the high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines without interface or pullup components.

To ensure the high-impedance state during power up or power down, OE\ should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

OE\ does not affect the 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.

产品特性

Wide Operating Voltage Range of 2 V to 6 V
High-Current 3-State Outputs Drive Bus Lines Directly or Up To 15 LSTTL Loads
Low Power Consumption, 80-µA Max ICC
Typical tpd = 21 ns
±6-mA Output Drive at 5 V
Low Input Current of 1 µA Max
Bus-Structured Pinout

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