SN54ACT563 Datasheet, PDF (1/6 Pages) Texas Instruments – OCTAL D-TYPE TRANSPARENT LATCHES WITH 3-STATE OUTPUTS

D Inputs Are TTL-Voltage Compatible
D 3-State Inverted Outputs Drive Bus Lines
Directly
D Flow-Through Architecture to Optimize
PCB Layout
D EPIC™ (Enhanced-Performance Implanted
CMOS) 1-µm Process
D Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), Thin Shrink Small-Outline (PW),
Ceramic Chip Carriers (FK) and
Flatpacks (W), and Standard Plastic (N) and
Ceramic (J) DIPs
SN54ACT563, SN74ACT563
OCTAL D-TYPE TRANSPARENT LATCHES
WITH 3-STATE OUTPUTS
SCAS550A – NOVEMBER 1995 – REVISED 1996
SN54ACT563 . . . J OR W PACKAGE
SN74ACT563 . . . DB, DW, N, OR PW PACKAGE
(TOP VIEW)
OE ₁
1D ₂
2D 3
3D 4
4D 5
5D 6
6D 7
7D 8
8D 9
GND 10
20 ^V_CC
19 ^1Q
18 2Q
17 3Q
16 4Q
15 5Q
14 6Q
13 7Q
12 8Q
11 LE
description
The ’ACT563 are octal D-type transparent latches
with 3-state outputs. When the latch-enable (LE)
input is high, the Q outputs are set to 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 places 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 high logic
level provide the capability to drive bus lines
without interface or pullup components.
SN54ACT563 . . . FK PACKAGE
(TOP VIEW)
3 2 1 20 19
3D 4
18 2Q
4D 5
17 _3Q
5D 6
16 _4Q
6D ⁷
15 _5Q
7D ⁸
14 _6Q
9 10 11 12 13
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.
The SN54ACT563 is characterized for operation over the full military temperature range of – 55°C to 125°C. The
SN74ACT563 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
(each latch)
INPUTS
OE LE
D
OUTPUT
Q
L
H
H
L
L
H
L
H
L
L
X
Q0
H
X
X
Z
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.
EPIC is a trademark of Texas Instruments Incorporated.
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.
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Copyright © 1996, Texas Instruments Incorporated
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