描述 Description

The ?ABT162244 devices are 16-bit buffers and line drivers designed specifically to improve both the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. These devices can be used as four 4-bit buffers, two 8-bit buffers, or one 16-bit buffer. These devices provide noninverting outputs and symmetrical active-low output-enable (OE)\\ inputs.

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

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.

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.

特性 Features

? Members of the Texas Instruments Widebus? Family
? Output Ports Have Equivalent 25- Series Resistors, So No External Resistors Are Required
? Typical VOLP (Output Ground Bounce) CC = 5 V, TA = 25°C
? High-Impedance State During Power Up and Power Down
? Ioff and Power-Up 3-State Support Hot Insertion
? Distributed VCC and GND Pins Minimize High-Speed Switching Noise
? Flow-Through Architecture Optimizes PCB Layout
? Latch-Up Performance Exceeds 500 mA Per JESD-17
Widebus is a trademark of Texas Instruments.