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
http://onsemi.com
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Inputs and Outputs on Opposite Sides of Package Allowing Easy
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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
V
CC
20
O
0
19
O
1
18
O
2
17
O
3
16
O
4
15
O
5
14
O
6
13
O
7
12
CP
11
1
1
PDIP−20
N SUFFIX
CASE 738
SOIC−20W
DW SUFFIX
CASE 751D
1
TSSOP−20
DT SUFFIX
CASE 948E
1
OE
2
D
0
3
D
1
4
D
2
5
D
3
6
D
4
7
D
5
8
D
6
9
D
7
10
GND
1
SOEIAJ−20
M SUFFIX
CASE 967
Figure 1. Pinout: 20−Lead Packages Conductors
(Top View)
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 6 of this data sheet.
PIN ASSIGNMENT
PIN
D
0
−D
7
CP
OE
O
0
−O
7
FUNCTION
Data Inputs
Clock Pulse Input
3−State Output Enable Input
3−State Outputs
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
D
0
D
1
D
2
D
3
D
4
D
5
D
6
D
7
CP
OE
O
0
O
1
O
2
O
3
O
4
O
5
O
6
O
7
Figure 2. Logic Symbol
©
Semiconductor Components Industries, LLC, 2006
1
December, 2006 − Rev. 8
Publication Order Number:
MC74AC574/D
ONSEMI [ ON SEMICONDUCTOR ]
