SN74F253
SN74F253 is Dual 1-of-4 Data Selector/Multiplexers manufactured by Texas Instruments.
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 VCC 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.
B 1G NC VCC 2G
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 mon 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
1C2 5
17 2C3
NC 6
16 NC
1C1 7
15...
