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HD74LVCR2245A - Octal Bidirectional Transceivers with 3-state Outputs

Description

The HD74LVCR2245A has eight buffers with three state outputs in a 20 pin package.

When (T / R ) is high, data flows from the A inputs to the B outputs, and when (T / R ) is low, data flows from the B inputs to the A outputs.

A and B bus are separated by making enable input (OE) high level.

Features

  • VCC = 1.65 to 5.5 V.
  • All inputs VIH (Max) = 5.5 V (@VCC = 0 to 5.5 V).
  • All inputs / outputs V I / O (Max) = 5.5 V (@V CC = 0 V or output off state).
  • Typical VOL ground bounce < 0.8 V (@VCC = 3.3 V, Ta = 25°C).
  • Typical VOH undershoot > 2.0 V (@VCC = 3.3 V, Ta = 25°C).
  • High output current ±12 mA (@V CC = 3.0 to 5.5 V).
  • All outputs have equivalent 26 Ω series resistors, so no external resistors are required HD74LVCR2245A Function Tabl.

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Full PDF Text Transcription

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HD74LVCR2245A Octal Bidirectional Transceivers with 3–state Outputs ADE-205-235A (Z) Preliminary 2nd. Edition January 1999 Description The HD74LVCR2245A has eight buffers with three state outputs in a 20 pin package. When (T / R ) is high, data flows from the A inputs to the B outputs, and when (T / R ) is low, data flows from the B inputs to the A outputs. A and B bus are separated by making enable input (OE) high level. All outputs, which are designed to sink up to 12 mA, include equivalent 26 Ω resistors to reduce overshoot and undreshoot. When VCC is between 0 and 1.5 V, the device is in the high impedance state during power up or power down.
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