SN54ALS563B_16 Datasheet, PDF (1/16 Pages) Texas Instruments – OCTAL D-TYPE TRANSPARENT LATCHES WITH 3-STATE OUTPUTS

SN54ALS563B, SN74ALS563B
OCTAL DĆTYPE TRANSPARENT LATCHES
WITH 3ĆSTATE OUTPUTS
SDAS163B − DECEMBER 1982 − REVISED NOVEMBER 2004
D 3-State Buffer-Type Outputs Drive Bus
Lines Directly
D Bus-Structured Pinout
description/ordering information
These 8-bit D-type transparent latches feature
3-state outputs designed specifically for driving
highly capacitive or relatively low-impedance
loads. They are particularly suitable for
implementing buffer registers, I/O ports,
bidirectional bus drivers, and working registers.
While the latch-enable (LE) input is high, the Q
outputs follow the complements of data (D) inputs.
When LE is taken low, the outputs are latched at
the inverse of the 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 a 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.
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.
SN54ALS563B . . . J OR W PACKAGE
SN74ALS563B . . . DW, N, OR NS 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
SN54ALS563B . . . FK PACKAGE
(TOP VIEW)
3D
3 2 1 20 19
4
18
2Q
4D ₅
17 ^3Q
5D 6
16 4Q
6D 7
15 5Q
7D 8
14 6Q
9 10 11 12 13
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE MARKING
PDIP − N
Tube of 20
SN74ALS563BN
SN74ALS563BN
0°C to 70°C
SOIC − DW
Tube of 25
Reel of 2000
SN74ALS563BDW
SN74ALS563BDWR
ALS563B
SOP − NS
Reel of 2000 SN74ALS563BNSR
ALS563B
CDIP − J
Tube of 20
SNJ54ALS563BJ
SNJ54ALS563BJ
−55°C to 125°C CFP − W
Tube of 85
SNJ54ALS563BW
SNJ54ALS563BW
LCCC − FK
Tube of 55
SNJ54ALS563BFK
SNJ54ALS563BFK
† _{Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available}
at www.ti.com/sc/package.
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is 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  2004, Texas Instruments Incorporated
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