SN74ABT245B Octal Bus Transceivers with 3-State Outputs | TI.com

SN74ABT245B (ACTIVE)

Octal Bus Transceivers with 3-State Outputs

Octal Bus Transceivers with 3-State Outputs - SN74ABT245B
Datasheet
 

Description

These octal bus transceivers are designed for asynchronous communication between data buses. The devices transmit data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (OE)\ input can be used to disable the device so the buses are effectively isolated.

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.

This device is 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 device when it is 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.

Features

  • Typical VOLP (Output Ground Bounce)
       <1 V at VCC = 5 V, TA = 25°C
  • Ioff and Power-Up 3-State Support Hot Insertion
  • High-Drive Outputs (–32-mA IOH, 64-mA IOL)
  • Latch-Up Performance Exceeds 500 mA Per JEDEC Standard JESD 17
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)

Parametrics

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Part number Order Technology Family VCC (Min) (V) VCC (Max) (V) Bits (#) Voltage (Nom) (V) F @ nom voltage (Max) (MHz) ICC @ nom voltage (Max) (mA) tpd @ nom Voltage (Max) (ns) IOL (Max) (mA) IOH (Max) (mA) Rating Operating temperature range (C)
SN74ABT245B Order now ABT     4.5     5.5     8     5     150     0.25     3.9     64     -32     Catalog     -40 to 85