National Semiconductor 54AC 74AC125 74ACT125 Data Sheet
Summary
The 74AC/ACT125 is a reliable Quad Buffer IC featuring four independent non-inverting buffers with integrated TRI-STATE outputs. This technical datasheet provides comprehensive guidance for circuit designers, offering detailed specifications on electrical characteristics, operational ratings (including voltage and temperature dependencies), connectivity diagrams, and essential timing parameters. Use this resource to ensure optimal integration of high-performance buffering in your electronic systems.
Page 1 Text Content
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54AC/74AC125 74ACT125 Quad Buffer with TRI-STATEÉ Outputs General Description Features
The ’AC/’ACT125 contains four independent non-inverting ICC reduced by 50%
buffers with TRI-STATE outputs. Outputs source/sink m A
’ACT125 has TTL-compatible outputs
Logic Symbol Connection Diagrams
Pin Assignment Pin Assignment
IEEE/IEC for DIP, SOIC and Flatpak for LCC
TL/F/10692–1 TL/F/10692–2
TL/F/10692–3
Pin Names Description
An, Bn Inputs On Outputs
Function Table
Inputs Output
HIGH Voltage Level
An Bn On
LOW Voltage Level HIGH Impedance Immaterial
TRI-STATEÉ is registered trademark of National Semiconductor Corporation. FACTTM is trademark of National Semiconductor Corporation.
C1995 National Semiconductor Corporation TL/F/10692 RRD-B30M75/Printed in U. S. A.
Page Summary Contents For National Semiconductor 54AC 74AC125 74ACT125 Data Sheet
Manual Details
| Brand | National |
|---|---|
| Pages | 9 |
| File Size | 139.33 KB |
| Published | May 31, 2026 |
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Frequently Asked Questions
What is the primary function of the 'ACT125' quad buffer?
It contains four independent non-inverting buffers with TRI-STATE outputs to manage signals.
How do I tell if this chip is safe to use in my circuit?
Always meet the databook specifications, as exceeding absolute maximum ratings may cause damage to the device.
What are the operational voltage requirements for the different types?
The 'AC' family requires a 2.0V to 6.0V supply voltage, while 'ACT' operates between 4.5V and 5.5V DC.
Can I use these outputs in an active signal setup?
Yes, the TRI-STATE capability allows you to put the outputs into a high impedance state (Z) when not transmitting data.