SN74AS258
SN74AS258 is Quad 2-Line To 1-Line Data Selectors/Multiplexers manufactured by Texas Instruments.
- Part of the SN74AS257 comparator family.
- Part of the SN74AS257 comparator family.
description
These data selectors/multiplexers are designed to multiplex signals from 4-bit data sources to 4-output data lines in bus-organized systems. The 3-state outputs do not load the data lines when the output-enable (OE) input is at a high logic level.
SN54ALS257A, SN54ALS258A . . . J PACKAGE SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 . . . D OR N PACKAGE (TOP VIEW)
A/B 1 1A 2 1B 3 1Y 4 2A 5 2B 6 2Y 7 GND 8
16 VCC 15 OE 14 4A 13 4B 12 4Y 11 3A 10 3B 9 3Y
SN54ALS257A, SN54ALS258A . . . FK PACKAGE (TOP VIEW)
1A A/B NC VCC OE
The SN54ALS257A and SN54ALS258A are characterized for operation over the full military temperature range of
- 55°C to 125°C. The SN74ALS257A, SN74ALS258A, SN74AS257, and SN74AS258 are characterized for operation from 0°C to 70°C.
1B
3 2 1 20 19
4A
1Y 5
17 4B
NC 6
16 NC
2A 7
15 4Y
2B 8
14 3A
9 10 11 12 13
2Y GND
NC 3Y 3B
- No internal connection
FUNCTION TABLE
INPUTS
OUTPUT Y
OE A /B
DATA AB
SN54ALS257A SN74ALS257A
SN74AS257
SN54ALS258A SN74ALS258A
HXXX
LLLX...
