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Product Detailed Parameters
- Description：IC DECODER/DEMUX 1X3:8 16SOIC
- Series：74HCT
- Mfr：Texas Instruments
- Package：Tube
- Type：Decoder/Demultiplexer
- Circuit：1 x 3:8
- Independent Circuits：1
- Current - Output High, Low：4mA, 4mA
- Voltage Supply Source：Single Supply
- Voltage - Supply：4.5V ~ 5.5V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：16-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：16-SOIC
- Grade：-
- Qualification：-
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Overview
The SN74HCT138DE4 is a 3-line to 8-line decoder/demultiplexer from the HCT logic family. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range of -40°C to +85°C. The device features typical propagation delays of 17 ns at 5.5 V and low power consumption with a maximum ICC of 80 µA. It incorporates three enable inputs to simplify cascading and data reception, making it suitable for high-speed memory decoding applications.
Feature Summary
- Designed for high-performance memory-decoding or data-routing applications requiring short propagation delay times
- Incorporates three enable inputs (two active-low, one active-high) to simplify cascading and demultiplexing
- TTL-voltage compatible inputs with low input current of 1 µA max
- Outputs can drive up to 10 LSTTL loads
Applications
- High-speed memory systems
- Data transmission systems
- System decoding in digital circuits
Procurement Notes
Verify the specific package type and suffix against the manufacturer's latest orderable addendum, as availability and packaging options may change. Confirm RoHS compliance and lead finish details directly with Texas Instruments or authorized distributors before finalizing procurement specifications.
Selection Notes
Select this component when TTL-compatible inputs are required alongside CMOS performance levels. Ensure the design accommodates the 4.5 V to 5.5 V supply voltage range. Consider the thermal resistance values provided in the datasheet for adequate heat dissipation in the chosen package configuration.
Part Context
This part belongs to the SNx4HCT138 series of 3-line to 8-line decoders/demultiplexers manufactured by Texas Instruments. The 'E' suffix typically denotes environmental compliance or specific manufacturing revisions within the catalog line. It is part of the broader 74HCT logic family designed for high-speed operation with TTL compatibility.
Replacement Considerations
SN74HCT138DRG4
FAQ
How many enable inputs does the SN74HCT138DE4 have?
The device incorporates three enable inputs: two active-low (G2A and G2B) and one active-high (G1).
What is the typical propagation delay time for this device?
The typical propagation delay time (tpd) is 17 ns.
