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MC74AC574 Datasheet PDF : 10 Pages
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MC74AC574, MC74ACT574
Octal D Flip−Flop with
3−State Outputs
The MC74AC574/74ACT574 is a high−speed, low power octal
flip−flop with a buffered common Clock (CP) and a buffered common
Output Enable (OE). The information presented to the D inputs is
stored in the flip−flops on the LOW−to−HIGH Clock (CP) transition.
The MC74AC574/74ACT574 is functionally identical to the
MC74AC374/74ACT374 except for the pinouts.
Features
• Inputs and Outputs on Opposite Sides of Package Allowing Easy
Interface with Microprocessors
• Useful as Input or Output Port for Microprocessors
• Functionally Identical to MC74AC374/74ACT374
• 3-State Outputs for Bus-Oriented Applications
• Outputs Source/Sink 24 mA
• ′ACT574 Has TTL Compatible Inputs
• Pb−Free Packages are Available
VCC O0 O1 O2 O3 O4 O5 O6 O7 CP
20 19 18 17 16 15 14 13 12 11
http://onsemi.com
1
1
PDIP−20
N SUFFIX
CASE 738
SOIC−20W
DW SUFFIX
CASE 751D
TSSOP−20
DT SUFFIX
CASE 948E
1
1 2 3 4 5 6 7 8 9 10
OE D0 D1 D2 D3 D4 D5 D6 D7 GND
Figure 1. Pinout: 20−Lead Packages Conductors
(Top View)
PIN ASSIGNMENT
PIN
FUNCTION
D0−D7
CP
Data Inputs
Clock Pulse Input
OE
3−State Output Enable Input
O0−O7
3−State Outputs
SOEIAJ−20
M SUFFIX
CASE 967
1
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 6 of this data sheet.
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
D0 D1 D2 D3 D4 D5 D6 D7
CP
OE
O0 O1 O2 O3 O4 O5 O6 O7
Figure 2. Logic Symbol
© Semiconductor Components Industries, LLC, 2006
1
December, 2006 − Rev. 8
Publication Order Number:
MC74AC574/D
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