Fairchild 74AC574 • 74ACT574 Octal D-Type Flip-Flop with 3-STATE Outputs - Data Manual
Summary
This high-speed octal D-Type Flip-Flop features eight independent inputs and versatile 3-STATE outputs, making it ideal for bus-oriented logic circuits and microprocessor interfacing. The AC/ACT574 is a reliable solution for storing digital data in system designs. This manual provides comprehensive technical specifications, including detailed electrical characteristics, absolute maximum ratings, power consumption details, and available package types (SOIC, SOP, TSSOP). It is designed for electronics engineers and hardware developers building robust, interfacing digital systems.
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74A 574 • 74A 574 O ctal D -Typ e F lip -F lo ith 3-S TA tp ts
September 1988 Revised March 2005
74AC574 • 74ACT574 Octal D-Type Flip-Flop with 3-STATE Outputs General Description Features The AC/ACT574 is a high-speed, low power octal flip-flop ICC and IOZ reduced by 50% with a buffered common Clock (CP) and a buffered com-
Inputs and outputs on opposite sides of package
mon Output Enable (OE). The information presented to the
allowing easy interface with microprocessors
D-type inputs is stored in the flip-flops on the LOW-to-HIGH
■Useful as input or output port for microprocessors
Clock (CP) transition.
■Functionally identical to AC/ACT374
The AC/ACT574 is functionally identical to the AC/ACT374
except for the pinouts. ■3-STATE outputs for bus-oriented applications ■Outputs source/sink 24 m A ■ACT574 has TTL-compatible inputs
Ordering Code: Order Number Package Number Package Description 74AC574SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide 74AC574SJ M20D Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74AC574MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 74AC574PC N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide 74ACT574SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide 74ACT574SJ M20D Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74ACT574MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 74ACT574PC N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code. Pb-Free package per JEDEC J-STD-020B.
FACT¥ is a trademark of Fairchild Semiconductor Corporation.
© 2005 Fairchild Semiconductor Corporation DS009910 www.fairchildsemi.com
Page Summary Contents For Fairchild 74AC574 • 74ACT574 Octal D-Type Flip-Flop with 3-STATE Outputs - Data Manual
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 9 |
| File Size | 113.31 KB |
| Published | June 16, 2026 |
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Frequently Asked Questions
How does the Output Enable (OE) function work?
When OE is LOW, outputs are active. When OE is HIGH, outputs go to high impedance state without affecting flip-flop content.
What is unique about the physical pin layout?
Inputs and outputs are on opposite sides of the package, allowing easy interface with microprocessors.
How does the 74ACT574 differ from the 74AC574?
The 74ACT574 has TTL-compatible inputs, while the 74AC574 operates across a wider VCC range (2.0V to 6.0V).