
SN54AC563, SN74AC563
OCTAL DTYPE TRANSPARENT LATCHES
WITH 3STATE OUTPUTS
SCAS552C NOVEMBER 1995 REVISED OCTOBER 2003
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D 2-V to 6-V VCC Operation
D Inputs Accept Voltages to 6 V
D Max tpd of 9 ns at 5 V
D 3-State Inverting Outputs Drive Bus Lines
Directly
D Full Parallel Access for Loading
D Flow-Through Architecture to Optimize
PCB Layout
description/ordering information
The ’AC563 devices are octal D-type transparent
latches
with
3-state
outputs.
When
the
latch-enable (LE) input is high, the Q outputs
follow the complements of the data (D) inputs.
When LE is taken low, the Q outputs are latched
at the inverse logic levels set up at the D inputs.
A buffered output-enable (OE) input can be used
to place the eight outputs in either a normal logic
state
(high
or
low
logic
levels)
or
the
high-impedance state. In the high-impedance
state, the outputs neither load nor drive the bus
lines significantly. The high-impedance state and
increased drive provide the capability to drive bus
lines without need for interface or pullup
components.
OE does not affect internal operations of the
latches. Old data can be retained or new data can
be entered while the outputs are in the
high-impedance state.
ORDERING INFORMATION
TA
PACKAGE
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP N
Tube
SN74AC563N
SOIC DW
Tube
SN74AC563DW
AC563
SOIC DW
Tape and reel
SN74AC563DWR
AC563
40
°C to 85°C
SOP NS
Tape and reel
SN74AC563NSR
AC563
40 C to 85 C
SSOP DB
Tape and reel
SN74AC563DBR
AC563
TSSOP PW
Tube
SN74AC563PW
AC563
TSSOP PW
Tape and reel
SN74AC563PWR
AC563
CDIP J
Tube
SNJ54AC563J
55
°C to 125°C
CFP W
Tube
SNJ54AC563W
55 C to 125 C
LCCC FK
Tube
SNJ54AC563FK
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OE
1D
2D
3D
4D
5D
6D
7D
8D
GND
VCC
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
LE
SN54AC563 ...J OR W PACKAGE
SN74AC563 . . . DB, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
3
2
1 20 19
910 11 12 13
4
5
6
7
8
18
17
16
15
14
2Q
3Q
4Q
5Q
6Q
3D
4D
5D
6D
7D
2D
1D
OE
8Q
7Q
1Q
8D
G
ND
CLK
V
CC
SN54AC563 . . . FK PACKAGE
(TOP VIEW)
UNLESS OTHERWISE NOTED this document contains PRODUCTION
DATA information current as of publication date. Products conform to
specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all
parameters.
Copyright
2003, Texas Instruments Incorporated
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.