November 1988
Revised December 1998
7
4
A
C
T563 Octal
Latc
h
wit
h

3-
ST
A
T
E Output
s
© 1999 Fairchild Semiconductor Corporation DS009970.prf www.fairchildsemi.com
74ACT563
Octal Latch with 3-STATE Outputs
General Description
The ACT563 is a high-speed octal latch with buffered com-
mon Latch Enable (LE) and buffered common Output
Enable (OE) inputs.
The ACT563 device is functionally identical to the ACT573,
but with inverted outputs.
Features
a73 I
CC
and I
OZ
reduced by 50%
a73 Inputs and outputs on opposite sides of package allow
easy interface with microprocessors
a73 Useful as input or output port for microprocessors
a73 Functionally identical to ACT573 but with inverted out-
puts
a73 Outputs source/sink 24 mA
a73 ACT563 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 Assignment
for SOIC
Pin Descriptions
FACT is a trademark of Fairchild Semiconductor Corporation.
Order Number Package Number Package Description
74ACT563SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body
Pin Names Description
D
0
–D
7
Data Inputs
LE Latch Enable Input
OE 3-STATE Output Enable Input
O
0
–O
7
3-STATE Latch Outputs