SN54ALS253 Datasheet, PDF (1/7 Pages) Texas Instruments – DUAL 1-OF-4 DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS

SN54ALS253, SN74ALS253, SN74AS253A
DUAL 1-OF-4 DATA SELECTORS/MULTIPLEXERS
WITH 3-STATE OUTPUTS
SDAS216A – APRIL 1982 – REVISED DECEMBER 1994
• 3-State Versions of the ′ALS153 and
SN74AS153
• Permits Multiplexing From n Lines to
One Line
• Performs Parallel-to-Serial Conversion
• Package Options Include Plastic
Small-Outline (D) Packages, Ceramic Chip
Carriers (FK), and Standard Plastic (N) and
Ceramic (J) 300-mil DIPs
description
SN54ALS253 . . . J PACKAGE
SN74ALS253, SN74AS253A . . . D OR N PACKAGE
(TOP VIEW)
1OE 1
B2
1C3 3
1C2 4
1C1 5
1C0 6
1Y 7
GND 8
16 V_CC
15 2OE
14 A
13 2C3
12 2C2
11 2C1
10 2C0
9 2Y
These data selectors/multiplexers contain
inverters and drivers to supply full binary decoding
data selection to the AND-OR gates. Separate
output control inputs are provided for each of the
two 4-line sections.
SN54ALS253 . . . FK PACKAGE
(TOP VIEW)
The 3-state outputs can interface with and drive
data lines of bus-organized systems. With all but
one of the common outputs disabled (at a
high-impedance state), the low impedance of the
single enabled output drives the bus line to a high
or low logic level. Each output has its own
output-enable (OE) input. The output is disabled
when OE is high.
3 2 1 20 19
1C3 4
18 A
1C2 5
17 2C3
NC 6
16 NC
1C1 7
15 2C2
1C0 8
14 _2C1
9 10 11 12 13
The SN54ALS253 is characterized for operation
over the full military temperature range of – 55°C
to 125°C. The SN74ALS253 and SN74AS253A
are characterized for operation from 0°C to 70°C.
NC – No internal connection
FUNCTION TABLE
SELECT†
B
A
INPUTS
DATA
OE
C0 C1 C2 C3
X
X
X
X
X
X
H
L
L
L
X
X
X
L
L
L
H
X
X
X
L
L
H
X
L
X
X
L
L
H
X
H
X
X
L
H
L
X
X
L
X
L
H
L
X
X
H
X
L
H
H
X
X
X
L
L
H
H
X
X
X
H
L
† _{Select inputs A and B are common to both sections.}
OUTPUT
Y
Z
L
H
L
H
L
H
L
H
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.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1994, Texas Instruments Incorporated
1