SN74ALS253
SN74ALS253 is Dual 1-of-4 Data Selectors/Multiplexers manufactured by Texas Instruments.
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 VCC 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.
B 1OE NC VCC 2OE
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 mon 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
1Y GND
NC 2Y 2C0
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.
- No internal connection
FUNCTION TABLE
SELECT†
INPUTS DATA OE
C0 C1 C2...
