SN54AS821A - 具有三态输出的 10 位总线接口触发器

SN54AS821A是TI德州仪器公司的一款D类触发器产品，SN54AS821A是具有三态输出的 10 位总线接口触发器，本站介绍了SN54AS821A的封装应用图解、特点和优点、功能等，并给出了与SN54AS821A相关的TI元器件型号供参考。

SN54AS821A - 具有三态输出的 10 位总线接口触发器 - D类触发器 - 触发器/锁存器/寄存器 - 德州仪器

产品描述

These 10-bit flip-flops feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. They are particularly suitable for implementing wider buffer registers, I/O ports, bidirectional bus drivers with parity, and working registers.

The ten flip-flops are edge-triggered D-type flip-flops. On the positive transition of the clock (CLK) input, the Q outputs are true to the data (D) input.

A buffered output-enable () input can be used to place the ten 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 drive provide the capability to drive bus lines without interface or pullup components.

does not affect the internal operation of the flip-flops. Previously stored data can be retained or new data can be entered while the outputs are in the high-impedance state.

The SN54AS821A is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74AS821A is characterized for operation from 0°C to 70°C.

产品特性

Functionally Equivalent to AMD's AM29821
Provide Extra Data Width Necessary for Wider Address/Data Paths or Buses With Parity
Outputs Have Undershoot-Protection Circuitry
Power-Up High-Impedance State
Buffered Control Inputs to Reduce dc Loading Effects
Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (NT) and Ceramic (JT) 300-mil DIPs

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