SN74ABT162827A中文资料具有 TTL 兼容型 CMOS 输入和三态输出的 20 通道、4.5V 至 5.5V 缓冲器数据手册TI规格书

描述 Description

The ’ABT162827A devices are noninverting 20-bit buffers composed of two 10-bit buffers with separate output-enable signals. For either 10-bit buffer, the two output-enable (1OE1\\ and 1OE2\\, or 2OE1\\ and 2OE2\\) inputs must both be low for the corresponding Y outputs to be active. If either output-enable input is high, the outputs of that 10-bit buffer are in the high-impedance state.

The outputs, which are designed to source or sink up to 12 mA, include equivalent 25- series resistors to reduce overshoot and undershoot.

These devices are fully specified for hot-insertion applications using Ioff and power-up 3-state. The Ioff circuitry disables the outputs, preventing damaging current backflow through the devices when they are powered down. The power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down, which prevents driver conflict.

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

特性 Features

• Members of the Texas Instruments Widebus™ Family
• High-Impedance State During Power Up and Power Down
• Distributed VCC and GND Pin Minimizes High-Speed Switching Noise
• Flow-Through Architecture Optimizes PCB Layout
• ESD Protection Exceeds JESD 22
• 200-V Machine Model (A115-A)

Widebus is a trademark of Texas Instruments.