HD74LVCZ245A

HD74LVCZ245A Octal Bidirectional Transceivers with 3–state Outputs ADE-205-228A (Z) 2nd. Edition February 1999 Description The HD74LVCZ245A 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. When V CC is between 0 and 1.5 V, the device is in the high impedance state during power up or power down. Low voltage and high speed operation is suitable at battery drive product (note type personal computer) and low power consumption extends the life of a battery for long time operation. Features VCC = 2.7 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 impedance state during power up and power down Power off disables outputs, permitting live insertion High output current ±24 mA (@V CC = 3.0 to 5.5 V) HD74LVCZ245A Function Table Inputs OE L L H H : High level L : Low level X : Immaterial Z : High impedance T/R L H X B data to A bus A data to B bus Z Operation Pin Arrangement T/R A0 A1 1 2 3 20 VCC 19 OE 18 B0 17 B1 16 B2 15 B3 14 B4 13 B5 12 B6 11 B7 A2 4 A3 A4 A5 A6 A7 5 6 7 8 9 GND 10 (Top view) 2 HD74LVCZ245A Absolute Maximum Rating...