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74HC138T16-13 Equivalent & Substitute Parts
Part Overview
The 74HC138T16-13 is a 1 x 3:8 decoder/demultiplexer logic IC manufactured by Diodes Incorporated in 16-TSSOP surface mount packaging. This component is actively produced and widely used in digital logic applications requiring address decoding and signal demultiplexing functions. Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative packaging or lead times are required, or when specific manufacturer certifications are needed for particular applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Base Product Number | 74HC138 |
| Circuit Configuration | 1 x 3:8 Decoder/Demultiplexer |
| Output Current (High/Low) | 5.2mA / 5.2mA |
| Supply Voltage Range | 2V to 6V |
| Operating Temperature Range | -40°C to 125°C |
| Package Type | 16-TSSOP (0.173", 4.40mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the 74HC138T16-13 is determined by strict adherence to the following electrical and mechanical parameters:
Critical Substitution Parameters:
- Base product number (74HC138 series)
- Circuit configuration (1 x 3:8 decoder/demultiplexer)
- Output current specifications (5.2mA high and low)
- Supply voltage range (2V to 6V minimum)
- Package type (16-TSSOP)
- Mounting type (Surface Mount)
Acceptable Variations:
- Manufacturer (Diodes Incorporated, onsemi, Texas Instruments, Fairchild Semiconductor, Nexperia USA Inc.)
- Packaging format (Tape & Reel, Cut Tape, Tube, Bulk)
- Operating temperature range (minimum -40°C or lower, maximum 85°C or higher)
- Product status (Active, Discontinued at DiGi Electronics, or Obsolete)
- Certifications and compliance ratings
Parts that maintain identical electrical characteristics and 16-TSSOP package specifications are direct substitutes regardless of manufacturer or packaging format.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Circuit | Output Current (mA) | Supply Voltage | Temp Range (°C) | Package | Product Status | Packaging Format |
|---|---|---|---|---|---|---|---|---|
| 74HC138T16-13 | Diodes Incorporated | 1 x 3:8 | 5.2 / 5.2 | 2V - 6V | -40 to 125 | 16-TSSOP | Active | Tape & Reel |
| MC74HC138ADTR2G | onsemi | 1 x 3:8 | 5.2 / 5.2 | 2V - 6V | -55 to 125 | 16-TSSOP | Active | Cut Tape & Digi-Reel |
| SN74HC138PWR | Texas Instruments | 1 x 3:8 | 5.2 / 5.2 | 2V - 6V | -40 to 85 | 16-TSSOP | Active | Cut Tape & Digi-Reel |
| MM74HC138MTC | Fairchild Semiconductor | 1 x 3:8 | 5.2 / 5.2 | 2V - 6V | -40 to 85 | 16-TSSOP | Active | Bulk |
| MM74HC138MTCX | Fairchild Semiconductor | 1 x 3:8 | 5.2 / 5.2 | 2V - 6V | -40 to 85 | 16-TSSOP | Active | Bulk |
| NLV74HC138ADTR2G | onsemi | 1 x 3:8 | 5.2 / 5.2 | 2V - 6V | -55 to 125 | 16-TSSOP | Obsolete | Cut Tape & Digi-Reel |
| SN74HC138PW | Texas Instruments | 1 x 3:8 | 5.2 / 5.2 | 2V - 6V | -40 to 85 | 16-TSSOP | Discontinued at DiGi Electronics | Tube |
| SN74HC138PWT | Texas Instruments | 1 x 3:8 | 5.2 / 5.2 | 2V - 6V | -40 to 85 | 16-TSSOP | Discontinued at DiGi Electronics | Cut Tape & Digi-Reel |
| 74HC138PW,118 | Nexperia USA Inc. | 1 x 3:8 | 5.2 / 5.2 | 2V - 6V | -40 to 125 | 16-TSSOP | Active | Tape & Reel |
| 74HC138PW-Q100,118 | Nexperia USA Inc. | 1 x 3:8 | 5.2 / 5.2 | 2V - 6V | -40 to 125 | 16-TSSOP | Active | Tape & Reel |
| 74HC238PW,118 | Nexperia USA Inc. | 1 x 3:8 | 5.2 / 5.2 | 2V - 6V | -40 to 125 | 16-TSSOP | Active | Cut Tape & Digi-Reel |
Engineering Selection Recommendations
Primary Substitutes (Active Status, Full Temperature Range): MC74HC138ADTR2G (onsemi) and 74HC138PW,118 (Nexperia USA Inc.) are preferred substitutes. Both maintain active product status and support the full -40°C to 125°C operating temperature range, matching or exceeding the original part's thermal specifications. MC74HC138ADTR2G extends the lower temperature limit to -55°C, providing additional margin for extreme cold environments.
Secondary Substitutes (Active Status, Reduced Temperature Range): SN74HC138PWR (Texas Instruments), MM74HC138MTC, and MM74HC138MTCX (Fairchild Semiconductor) are suitable for applications where the -40°C to 85°C operating range is sufficient. These parts maintain active production status and identical electrical characteristics.
Automotive-Grade Option: 74HC138PW-Q100,118 (Nexperia USA Inc.) includes AEC-Q100 automotive qualification and is suitable for automotive and high-reliability applications requiring formal qualification documentation.
Avoid: NLV74HC138ADTR2G (onsemi), SN74HC138PW, and SN74HC138PWT (Texas Instruments) are not recommended for new designs due to obsolete or discontinued product status, though they remain electrically compatible if existing inventory is available.
Frequently Asked Questions (FAQ)
Q: Can I substitute the 74HC138T16-13 with any of the listed parts? A: All listed parts are electrically equivalent and use identical 16-TSSOP packaging. Substitution is valid provided the operating temperature range of the substitute meets or exceeds your application requirements. Parts with -40°C to 85°C ratings are suitable for standard industrial applications; parts with -40°C to 125°C or -55°C to 125°C ratings provide extended thermal performance.
Q: What is the difference between the various packaging formats (Tape & Reel, Cut Tape, Tube, Bulk)? A: Packaging format affects handling, storage, and assembly processes but does not alter electrical performance. Tape & Reel and Cut Tape formats are standard for automated assembly. Tube packaging is used for manual assembly or lower-volume applications. Bulk packaging is typically used for high-volume orders. Select based on your manufacturing process requirements.
Q: Is the 74HC138PW-Q100,118 suitable for automotive applications? A: Yes. The 74HC138PW-Q100,118 includes AEC-Q100 automotive qualification, making it suitable for automotive-grade applications requiring formal qualification documentation and compliance with automotive reliability standards.
Q: Why do some substitutes have different temperature ranges? A: Operating temperature range is determined by the manufacturer's design and testing specifications. The MC74HC138ADTR2G supports -55°C to 125°C, while Texas Instruments and Fairchild parts support -40°C to 85°C. Select based on your application's thermal requirements. Extended temperature ranges provide additional margin for extreme environments.
Q: Are all substitutes RoHS3 compliant? A: All listed active and recently discontinued parts are RoHS3 compliant. Verify compliance documentation for obsolete parts if required for your application.
Q: Can I use the 74HC238PW,118 as a substitute for the 74HC138T16-13? A: Yes. The 74HC238PW,118 is a parametric equivalent with identical electrical specifications and 16-TSSOP packaging. The 74HC238 is a functionally equivalent decoder/demultiplexer variant within the same product family.
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