Quad Buffer/Line Driver with 3-State Output
HD74AC126/HD74ACT126
Quad Buffer/Line Driver with 3-State Output
Description
The HD74AC126/HD74ACT126 is an quad buffer...
Description
HD74AC126/HD74ACT126
Quad Buffer/Line Driver with 3-State Output
Description
The HD74AC126/HD74ACT126 is an quad buffer and line driver designed to be employed as a memory address driver, clock driver and bus oriented transmitter/receiver which provides improved PC board density.
Features
3-State Outputs Drive Bus Lines or Buffer Memory Address Registers Outputs Source/Sink 24 mA HD74ACT126 has TTL-Compatible Inputs
Pin Arrangement
E 1 D 2 O 3 E 4 D 5 O 6 GND 7 (Top view)
14 VCC 13 E 12 D 11 O 10 E 9 D 8 O
HD74AC126/HD74ACT126
Logic Symbol
D
O
E
Pin Names
D E O Data Inputs 3-State Output Enable Inputs (Active High) Outputs
Truth Table
Inputs E H H L H L X Z : : : : High Voltage Level Low Voltage Level Immaterial High Impedance D L H X Output L H Z
DC Characteristics (unless otherwise specified)
Item Maximum Quiescent Supply Current Maximum Quiescent Supply Current Maximum ICC/Input (HD74ACT126) Symbol I CC I CC I CCT Max 80 8.0 1.5 Unit µA µA mA Condition VIN = VCC or ground, VCC = 5.5 V, Ta = Worst case VIN = VCC or ground, VCC = 5.5 V, Ta = 25°C VIN = VCC – 2.1 V, VCC = 5.5 V Ta = Worst case
2
HD74AC126/HD74ACT126
AC Characteristics: HD74AC126
Ta = +25°C CL = 50 pF Item Propagation Delay Symbol t PLH VCC (V)*1 3.3 5.0 Propagation Delay t PHL 3.3 5.0 Enable Time t PZL 3.3 5.0 Enable Time t PHZ 3.3 5.0 Disable Time t PLZ 3.3 5.0 Disable Time t PZH 3.3 5.0 Note: 1. Voltage Range 3.3 is 3.3 V ± 0.3 V Voltage Range 5.0 is 5.0 V ± 0.5 V Min 1.0 1.0 1.0 1.0 1.0...
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