SN74F138DR ,3-line to 8-line decoder / demultiplexermaximum ratings over operating free-air temperature range (unless otherwise noted)Supply voltage ra ..
SN74F138DRE4 ,3-line to 8-line decoder / demultiplexer 16-SOIC 0 to 70maximum ratings” may cause permanent damage to the device. These are stress ratings only andfunctio ..
SN74F138N ,3-line to 8-line decoder / demultiplexermaximum ratings” may cause permanent damage to the device. These are stress ratings only andfunctio ..
SN74F138NSR ,3-line to 8-line decoder / demultiplexermaximum ratings over operating free-air temperature range (unless otherwise noted)Supply voltage ra ..
SN74F151B ,8-Line To 1-Line Data Selector/Multiplexer SDFS023A − D2932, MARCH 1987 − REVISED OCT ..
SN74F151BD ,8-Line To 1-Line Data Selector/Multiplexermaximum ratings over operating free-air temperature range (unless otherwise noted)Supply voltage ra ..
SN75121D ,Dual Line Driversmaximum ratings” may cause permanent damage to the device. These are stress ratings only, andfuncti ..
SN75121N ,Dual Line Driverslogic diagram (positive logic)111A1A &1 ≥221B1B31C341C1D74 71Y1Y1D551E1E &661F1F102A112B12102C 92A2 ..
SN75121N. ,Dual Line Driversmaximum ratings over operating free-air temperature (unless otherwise noted)Supply voltage, V (see ..
SN75122N ,Triple Line Receivers 16-PDIP 0 to 70
SN75123 ,Dual Line Drivermaximum ratings over operating free-air temperature range (unless otherwise noted)Supply voltage, V ..
SN75123N ,Dual Line Drivermaximum ratings” may cause permanent damage to the device. These are stress ratings only, andfuncti ..
SN74F138-SN74F138D-SN74F138DR-SN74F138DRE4-SN74F138N-SN74F138NSR
3-line to 8-line decoder / demultiplexer
Package Options Include PlasticSmall-Outline Packages, Ceramic Chip
Carriers, and Standard Plastic and Ceramic
300-mil DIPs
descriptionThe ′F138 is designed to be used in
high-performance memory-decoding or data-
routing applications requiring very short
propagation delay times. In high-performance
memory systems, these decoders can be used to
minimize the effects of system decoding. When
employed with high-speed memories utilizing a
fast enable circuit, the delay times of this decoder
and the enable time of the memory are usually
less than the typical access time of the memory.
This means that the effective system delay
introduced by the decoder is negligible.
The conditions at the binary-select inputs and the
three enable inputs select one of eight output
lines. Two active-low and one active-high enable
inputs reduce the need for external gates or
inverters when expanding. A 24-line decoder can
be implemented without external inverters and a 32-line decoder requires only one inverter. An enable input can
be used as a data input for demultiplexing applications.
The SN54F138 is characterized for operation over the full military temperature range of –55°C to 125°C. The
SN74F138 is characterized for operation from 0°C to 70°C.
SN54F138... FK PACKAGE
(TOP VIEW)G2A
G2BANCY5Y0
GND
NC – No internal connection
G2A
G2B
GND
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
