© 1999 Fairchild Semiconductor Corporation DS009910 www.fairchildsemi.com
September 1988
Revised November 1999
74AC574 • 74ACT574 Octal D-Type Flip-Flop with 3-STATE Outputs
74AC574 • 74ACT574
Octal D-Type Flip-Flop with 3-STATE Outputs
General Description
The AC/ACT574 is a high-speed, low power octal flip-flop
with a buffered common Clock (CP) and a buffered com-
mon Output Enable (OE
). The information presented to the
D-type inputs is stored in the flip-flops on the LOW-to-HIGH
Clock (CP) transition.
The AC/ACT574 is functionally identical to the AC/ACT374
except for the pinouts.
Features
■ I
CC
and I
OZ
reduced by 50%
■ Inputs and outputs on opposite sides of package
allowing easy interface with microprocessors
■ Useful as input or output port for microprocessors
■ Functionally identical to AC/ACT374
■ 3-STATE outputs for bus-oriented applications
■ Outputs source/sink 24 mA
■ ACT574 has TTL-compatible inputs
Ordering Code:
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbols
IEEE/IEC
Connection Diagram
Pin Descriptions
FACT is a trademark of Fairchild Semiconductor Corporation.
Order Number Package Number Package Description
74AC574SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body
74AC574SJ M20D 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-01
74ACT574SJ M20D 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
Pin Names Description
D
0
–D
7
Data Inputs
CP Clock Pulse Input
OE
3-STATE Output Enable Input
O
0
–O
7
3-STATE Outputs