SN54F253_13 Datasheet, PDF (1/8 Pages) Texas Instruments – DUAL 1-OF-4 DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS

SN54F253, SN74F253
DUAL 1ĆOFĆ4 DATA SELECTORS/MULTIPLEXERS
WITH 3ĆSTATE OUTPUTS
SDFS064A − D2032, MARCH 1987 − REVISED OCTOBER 1993
• 3-State Versions of SN54F153 and
SN74F153
• Permits Multiplexing From N Lines to
One Line
• Performs Parallel-to-Serial Conversion
• Package Options Include Plastic
Small-Outline Packages, Ceramic Chip
Carriers, and Standard Plastic and Ceramic
300-mil DIPs
description
SN54F253 . . . J PACKAGE
SN74F253 . . . D OR N PACKAGE
(TOP VIEW)
1G 1
B2
1C3 3
1C2 4
1C1 5
1C0 6
1Y 7
GND 8
16 V_CC
15 2G
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.
SN54F253 . . . 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 will drive the bus line to a
high or low logic level. Each output has its own
strobe (G) inputs. The output is disabled when its
strobe is high.
1C3
3 2 1 20 19
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 SN54F253 is characterized for operation over
the full military temperature range of − 55°C to
125°C. The SN74F253 is characterized for
operation from 0°C to 70°C.
NC − No internal connection
FUNCTION TABLE
SELECT
B
A
INPUTS
DATA
C0 C1 C2
STROBE
G
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.
Copyright  1993, Texas Instruments Incorporated
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
• POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
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