SN54F251B
SN54F251B is 1-of-8 Data Selectors/Multiplexers manufactured by Texas Instruments.
- 3-State Versions of SN54F151B and
SN74F151B
- 3-State Outputs Interface Directly With
System Bus
- Performs Parallel-to-Serial Conversion
- plementary Outputs Provide True and
Inverted Data
- Package Options Include Plastic
Small-Outline Packages, Ceramic Chip
Carriers, and Standard Plastic and Ceramic
300-mil DIPs
SN54F251B, SN74F251B 1ĆOFĆ8 DATA SELECTORS/MULTIPLEXERS
WITH 3ĆSTATE OUTPUTS
SDFS066A
- MARCH 1987
- REVISED OCTOBER 1993
SN54F251B . . . J PACKAGE SN74F251B . . . D OR N PACKAGE
(TOP VIEW)
D3 1 D2 2 D1 3 D0 4
Y5 W6 G7 GND 8
16 VCC 15 D4 14 D5 13 D6 12 D7 11 A 10 B 9C description
These data selectors/multiplexers contain full binary decoding to select one of eight data sources and feature strobe-controlled plementary outputs. The 3-state outputs can interface with and drive data lines of busorganized systems. When the strobe (G) input is high, both outputs are in a high-impedance state in which both the upper and lower transistors of each totem-pole output are off, and the output neither drives nor loads the bus significantly.
The SN54F251B is characterized for operation over the full military temperature range of
- 55°C to 125°C. The SN74F251B is characterized for operation from 0°C to 70°C.
SN54F251B . . . FK PACKAGE (TOP VIEW)
D2 D3 NC VCC D4
3 2 1 20 19
D1 4
18 D5
D0...
