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MC74AC573 Datasheet PDF : 12 Pages
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MC74AC573, MC74ACT573
Octal Buffer/Line Driver
with 3−State Outputs
The MC74AC573/74ACT573 is a high−speed octal latch with
buffered common Latch Enable (LE) and buffered common Output
Enable (OE) inputs.
The MC74AC573/74ACT573 is functionally identical to the
MC74AC373/74ACT373 but has inputs and outputs on opposite sides.
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 MC74AC373/74ACT373
• 3−State Outputs for Bus Interfacing
• Outputs Source/Sink 24 mA
• ′ACT573 Has TTL Compatible Inputs
• Pb−Free Packages are Available*
VCC O0 O1 O2 O3 O4 O5 O6 O7 LE
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
LE
Data Inputs
Latch Enable Input
OE
3−State Output Enable Input
O0−O7
3−State Latch Outputs
D0 D1 D2 D3 D4 D5 D6 D7
LE
OE
O0 O1 O2 O3 O4 O5 O6 O7
Figure 2. Logic Symbol
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
http://onsemi.com
MARKING
DIAGRAM
20
1
PDIP−20
N SUFFIX
CASE 738
MC74xxx573N
AWLYYWWG
20
1
SO−20
DW SUFFIX
CASE 751D
20
1
TSSOP−20
DT SUFFIX
CASE 948E
xxx573
AWLYYWWG
xxx
573
ALYW G
G
20
1
74xxx573
AWLYWWG
EIAJ−20
M SUFFIX
CASE 967
xxx = AC or ACT
A
= Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
G or G = Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 8 of this data sheet.
© Semiconductor Components Industries, LLC, 2005
1
September, 2005 − Rev. 7
Publication Order Number:
MC74AC573/D
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