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SN74ABT843-具有三态输出的 9 位总线接口 D 类锁存器
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TI产品 - SN74ABT843介绍

SN74ABT843 - 具有三态输出的 9 位总线接口 D 类锁存器

SN74ABT843是TI德州仪器公司的一款D类锁存器产品，SN74ABT843是具有三态输出的 9 位总线接口 D 类锁存器，本站介绍了SN74ABT843的封装应用图解、特点和优点、功能等，并给出了与SN74ABT843相关的TI元器件型号供参考。

SN74ABT843 - 具有三态输出的 9 位总线接口 D 类锁存器 - D类锁存器 - 触发器/锁存器/寄存器 - 德州仪器

产品描述

The 'ABT843 9-bit latches are 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.

The nine transparent D-type latches provide true data at the outputs.

A buffered output-enable (OE\) input can be used to place the nine outputs in either a normal logic state (high or low logic levels) or a high-impedance state. The outputs are also in the high-impedance state during power-up and power-down conditions. The outputs remain in the high-impedance state while the device is powered down. 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 need for interface or pullup components.

OE\ does not affect the internal operations of the latch. Previously stored data can be retained or new data can be entered while the outputs are in the high-impedance state.

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.

The SN54ABT843 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ABT843 is characterized for operation from -40°C to 85°C.

产品特性

  • State-of-the-Art EPIC-II BTM BiCMOS Design Significantly Reduces Power Dissipation
  • Latch-Up Performance Exceeds 500 mA Per JEDEC Standard JESD-17
  • Typical VOLP (Output Ground Bounce) < 1 V at VCC = 5 V, TA = 25°C
  • High-Drive Outputs (-32-mA IOH, 64-mA IOL)
  • Package Options Include Plastic Small-Outline (DW) and Shrink Small-Outline (DB) Packages, Ceramic Chip Carriers (FK), Ceramic Flat (W) Package, and Plastic (NT) and Ceramic (JT) DIPs

    EPIC-IIB is a trademark of Texas Instruments Incorporated.

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