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Product Detailed Parameters
- Description：IC DECODER/DEMUX 1X3:8 16SOIC
- Series：74LS
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Decoder/Demultiplexer
- Circuit：1 x 3:8
- Independent Circuits：1
- Current - Output High, Low：400µA, 8mA
- Voltage Supply Source：Single Supply
- Voltage - Supply：4.75V ~ 5.25V
- Operating Temperature：0°C ~ 70°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 SN74LS138DR is a Low-power Schottky (LS) logic device manufactured by Texas Instruments, functioning as a 3-to-8 line decoder or demultiplexer. It operates within a supply voltage range of 4.75 V to 5.25 V and features a propagation delay of 41 ns. The component is housed in a 16-pin SOIC (D) package designed for surface-mount technology. It supports an operating temperature range from 0°C to +70°C and complies with RoHS standards using NIPDAU lead finish.
Feature Summary
- Provides decoding and demultiplexing capabilities for three binary inputs across eight outputs
- Utilizes Low-power Schottky logic technology for efficient power consumption
- Includes active-low enable inputs to control device operation states
Applications
- Address decoding for memory systems
- Demultiplexing data streams in digital circuits
- Control signal generation in industrial automation
Procurement Notes
Verify the specific ordering suffix 'DR' corresponds to the Large Tape & Reel packaging configuration containing 2500 units per reel. Confirm that the NIPDAU lead finish meets the solderability requirements for the intended assembly process. Ensure the SOIC-D package dimensions align with the designated footprint on the printed circuit board layout.
Selection Notes
Select this part when a standard TTL-compatible decoder is required for commercial temperature ranges. The LS series offers a balance between speed and power dissipation suitable for general-purpose logic applications. Verify that the 16-pin SOIC form factor fits the available space constraints on the target PCB design.
Part Context
This component belongs to the SN74LS138 family, which includes variants such as the tube-packaged SN74LS138D and the plastic DIP SN74LS138N. The 'DR' suffix specifically denotes the tape-and-reel version optimized for automated surface-mount assembly lines, distinguishing it from manual insertion packages.
Replacement Considerations
SN74LS138D
FAQ
What does the 'DR' suffix indicate for this part number?
The 'DR' suffix indicates that the device is packaged in a Large Tape & Reel format with a quantity of 2500 units per reel.
Is this component compliant with environmental regulations?
Yes, the SN74LS138DR is listed as RoHS compliant with a NIPDAU lead finish.
