54LS138 ,1-OF-8 DECODER/ DEMULTIPLEXERSN54/74LS1381-OF-8 DECODER/DEMULTIPLEXERThe LSTTL/MSI SN54/74LS138 is a high speed 1-of-8 Decoder/D ..
54LS138J ,Decoders/DemultiplexersFeaturesused to minimize the effects of system decoding. WhenYDesigned specifically for high speed: ..
54LS138J ,Decoders/Demultiplexersapplications.54LS139) are available. Contact a National Semicon-All of these decoders/demultiplexer ..
54LS139 ,Dual 2-to-4 Line Decoder/Demultiplexerapplications.54LS139) are available. Contact a National Semicon-All of these decoders/demultiplexer ..
54LS139 ,Dual 2-to-4 Line Decoder/Demultiplexer54LS138/DM54LS138/DM74LS138,54LS139/DM54LS139/DM74LS139Decoders/DemultiplexersJune198954LS138/DM54L ..
54LS14 ,Hex Inverter with Schmitt Trigger Inputs54LS14/DM74LS14HexInverterswithSchmittTriggerInputsJune198954LS14/DM74LS14HexInverterswithSchmittTr ..
6TPB100MC , standard products corresponding to the diversification of the needs
6TPB100MC , standard products corresponding to the diversification of the needs
6TPB150MC , standard products corresponding to the diversification of the needs
6TPB150MC , standard products corresponding to the diversification of the needs
6TPB150MC , standard products corresponding to the diversification of the needs
6TPB150ML , standard products corresponding to the diversification of the needs
54LS138-SN54LS138J-SN74LS138N
1-OF-8 DECODER/ DEMULTIPLEXER
1-OF-8 DECODER/
DEMULTIPLEXERThe LSTTL/MSI SN54/74LS138 is a high speed 1-of-8 Decoder/
Demultiplexer. This device is ideally suited for high speed bipolar memory
chip select address decoding. The multiple input enables allow parallel ex-
pansion to a 1-of-24 decoder using just three LS138 devices or to a 1-of-32
decoder using four LS138s and one inverter. The LS138 is fabricated with the
Schottky barrier diode process for high speed and is completely compatible
with all Motorola TTL families. Demultiplexing Capability Multiple Input Enable for Easy Expansion Typical Power Dissipation of 32 mW Active Low Mutually Exclusive Outputs Input Clamp Diodes Limit High Speed Termination Effects--- -- -- -- ---- --- -- -- -- -- ---
CONNECTION DIAGRAM DIP (TOP VIEW)NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
PIN NAMES LOADING (Note a)A0–A2
E1, E2
O0–O7
Address Inputs
Enable (Active LOW) Inputs
Enable (Active HIGH) Input
Active LOW Outputs (Note b)
NOTES: 1 TTL Unit Load (U.L.) = 40 μA HIGH/1.6 mA LOW. The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial (74)
Temperature Ranges.
LOGIC DIAGRAM- -- -- ------- - - - - - - -
