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.
• 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
VCC O0 O1 O2 O3 O4 O5 O6 O7 CP
20 19 18 17 16 15 14 13 12 11
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
http://onsemi.com
20
1
20
1
20
1
PDIP–20
N SUFFIX
CASE 738
SO–20
DW SUFFIX
CASE 751
TSSOP–20
DT SUFFIX
CASE 948E
20
1
EIAJ–20
M SUFFIX
CASE 967
ORDERING INFORMATION
Device
Package
Shipping
MC74AC574N
PDIP–20 18 Units/Rail
MC74ACT574N
PDIP–20 18 Units/Rail
MC74AC574DW
SOIC–20 38 Units/Rail
MC74AC574DWR2 SOIC–20 1000 Tape & Reel
MC74ACT574DW SOIC–20 38 Units/Rail
MC74ACT574DWR2 SOIC–20 1000 Tape & Reel
MC74AC574DT
TSSOP–20 75 Units/Rail
MC74AC574DTR2 TSSOP–20 2500 Tape & Reel
MC74ACT574DT TSSOP–20 75 Units/Rail
MC74ACT574DTR2 TSSOP–20 2500 Tape & Reel
MC74AC574M
EIAJ–20 40 Units/Rail
MC74AC574MEL
EIAJ–20 2000 Tape & Reel
MC74ACT574M
EIAJ–20 40 Units/Rail
MC74ACT574MEL EIAJ–20 2000 Tape & Reel
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 8 of this data sheet.
© Semiconductor Components Industries, LLC, 2001
1
May, 2001 – Rev. 6
Publication Order Number:
MC74AC574/D