SN74ALS251
SN74ALS251 is 1-of-8 Data Selectors/Multiplexers manufactured by Texas Instruments.
description
These data selectors/multiplexers contain full binary decoding to select one-of-eight data sources and feature controlled plementary 3-state outputs.
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 the high-impedance state), the low impedance of the signal-enabled output drives the bus line to a high or low logic level. Both outputs are controlled by the output-enable (OE) input. The outputs are disabled when OE is high.
The SN54ALS251 is characterized for operation over the full military temperature range of
- 55°C to 125°C. The SN74ALS251 is characterized for operation from 0°C to 70°C.
SN54ALS251, SN74ALS251 1ĆOFĆ8 DATA SELECTORS/MULTIPLEXERS
WITH 3ĆSTATE OUTPUTS
SDAS215A
- APRIL 1982
- REVISED DECEMBER 1994
SN54ALS251 . . . J PACKAGE SN74ALS251 . . . D OR N PACKAGE
(TOP VIEW)
D3 1 D2 2 D1 3 D0 4
Y5 W6 OE 7 GND 8
16 VCC 15 D4 14 D5 13 D6 12 D7 11 A 10 B 9C
SN54ALS251 . . . FK PACKAGE (TOP VIEW)
D4
D3
D2
3 2 1 20 19
D1 4
18 D5
D0 5
17 D6
NC 6
16 NC
Y7
15 D7
W8
14 A
9 10 11 12 13
- No internal...
