• 3-State Versions of SN54F151B and
SN74F151B
• 3-State Outputs Interface Directly With
System Bus
• Performs Parallel-to-Serial Conversion
• Complementary Outputs Provide True and
Inverted Data
• Package Options Include Plastic
Small-Outline Packages, Ceramic Chip
Carriers, and Standard Plastic and Ceramic
300-mil DIPs

description
These data selectors/multiplexers contain full
binary decoding to select one of eight data
sources and feature strobe-controlled
complementary 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.