Request Quote
(Ships tomorrow)
SN74HC157DT Equivalent & Substitute Parts
Part Overview
The SN74HC157DT is a 4 x 2:1 multiplexer logic integrated circuit manufactured by Texas Instruments in a 16-SOIC surface mount package. This part is currently discontinued at DiGi Electronics, with 2230 units available in new original stock. The SN74HC157DT operates as a data selector that routes one of four input pairs to a single output based on control signals, making it essential for signal multiplexing applications in digital systems. Due to its discontinued status, identifying equivalent and substitute parts is necessary for design continuity and procurement planning.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | SN74HC157DT |
| Manufacturer | Texas Instruments |
| Type | Multiplexer |
| Circuit Configuration | 4 x 2:1 |
| Package / Case | 16-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Voltage Supply | 2V ~ 6V |
| Current - Output High, Low | 7.8mA, 7.8mA |
| Operating Temperature | -40°C ~ 85°C |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
| Product Status | Discontinued at DiGi Electronics |
Substitute Part Grouping Explanation
Substitution for the SN74HC157DT is determined by strict equivalence across the following critical parameters: circuit configuration (4 x 2:1 multiplexer), package type (16-SOIC surface mount), voltage supply range (2V ~ 6V), output current specifications (7.8mA high and low), operating temperature range (-40°C ~ 85°C), and compliance certifications (ROHS3, MSL 1). Parts are grouped into three categories based on their relationship to the main part:
Parametric Equivalents maintain identical electrical and mechanical specifications with the same base product number (74HC157 or 74HC158 series) and are direct functional replacements.
Direct Manufacturer Equivalents from alternative manufacturers (onsemi) provide the same circuit function and package with equivalent electrical performance.
Upgrade Options from NXP Semiconductors offer the same circuit configuration and package but may include enhanced specifications such as extended operating temperature ranges or automotive qualification, suitable for applications requiring higher reliability or broader temperature operation.
Parameter Comparison
| Part Number | Manufacturer | Circuit | Package | Voltage Supply | Output Current (High/Low) | Operating Temp | Product Status | Packaging Type |
|---|---|---|---|---|---|---|---|---|
| SN74HC157DT | Texas Instruments | 4 x 2:1 | 16-SOIC | 2V ~ 6V | 7.8mA / 7.8mA | -40°C ~ 85°C | Discontinued | Cut Tape (CT) |
| SN74HC157DR | Texas Instruments | 4 x 2:1 | 16-SOIC | 2V ~ 6V | 7.8mA / 7.8mA | -40°C ~ 85°C | Active | Cut Tape (CT) |
| SN74HC158DR | Texas Instruments | 4 x 2:1 | 16-SOIC | 2V ~ 6V | 7.8mA / 7.8mA | -40°C ~ 85°C | Active | Tape & Reel (TR) |
| SN74HC158DT | Texas Instruments | 4 x 2:1 | 16-SOIC | 2V ~ 6V | 7.8mA / 7.8mA | -40°C ~ 85°C | Last Time Buy | Tape & Reel (TR) |
| SN74HC257DR | Texas Instruments | 4 x 2:1 | 16-SOIC | 2V ~ 6V | 7.8mA / 7.8mA | -40°C ~ 85°C | Active | Cut Tape (CT) |
| SN74HC257DT | Texas Instruments | 4 x 2:1 | 16-SOIC | 2V ~ 6V | 7.8mA / 7.8mA | -40°C ~ 85°C | Discontinued | Cut Tape (CT) |
| SN74HC258DR | Texas Instruments | 4 x 2:1 | 16-SOIC | 2V ~ 6V | 7.8mA / 7.8mA | -40°C ~ 85°C | Active | Tape & Reel (TR) |
| MC74HC157ADR2G | onsemi | 4 x 2:1 | 16-SOIC | 2V ~ 6V | 7.8mA / 7.8mA | -55°C ~ 125°C | Active | Tape & Reel (TR) |
| 74HC157D,653 | Nexperia USA Inc. | 4 x 2:1 | 16-SOIC | 2V ~ 6V | 5.2mA / 5.2mA | -40°C ~ 125°C | Active | Tape & Reel (TR) |
| 74HC157D-Q100,118 | NXP USA Inc. | 4 x 2:1 | 16-SOIC | 2V ~ 6V | 5.2mA / 5.2mA | -40°C ~ 125°C | Active | Bulk |
Engineering Selection Recommendations
Primary Recommendation: SN74HC157DR
The SN74HC157DR is the optimal substitute for the discontinued SN74HC157DT. Both parts share identical electrical specifications, the same 16-SOIC package, and equivalent output current ratings. The SN74HC157DR maintains active product status with 9770 units in stock, ensuring long-term availability. The only difference is packaging format (Cut Tape vs. Digi-Reel), which does not affect circuit performance or PCB assembly compatibility.
Secondary Recommendation: SN74HC158DR or SN74HC258DR
The SN74HC158DR and SN74HC258DR are parametric equivalents with identical electrical and mechanical specifications. Both are active products with substantial inventory. These parts are suitable for direct substitution where the specific multiplexer variant (157, 158, or 257 series) does not impose functional constraints in the application.
Alternative from onsemi: MC74HC157ADR2G
The MC74HC157ADR2G from onsemi provides equivalent circuit functionality and package specifications. This part offers an extended operating temperature range (-55°C ~ 125°C) compared to the original part (-40°C ~ 85°C), making it suitable for applications requiring broader temperature operation. The part is active with 2900 units available.
Upgrade Options: 74HC157D,653 and 74HC157D-Q100,118
NXP Semiconductors offers 74HC157D,653 and 74HC157D-Q100,118 as upgrade alternatives. These parts maintain the 4 x 2:1 circuit configuration and 16-SOIC package but feature reduced output current specifications (5.2mA vs. 7.8mA) and extended operating temperature range (-40°C ~ 125°C). The 74HC157D-Q100,118 includes AEC-Q100 automotive qualification, suitable for automotive and high-reliability applications. Both parts are ROHS3 compliant and actively produced.
Frequently Asked Questions (FAQ)
Q: Can I use SN74HC157DR as a direct replacement for SN74HC157DT?
A: Yes. Both parts are manufactured by Texas Instruments with identical electrical specifications, circuit configuration (4 x 2:1 multiplexer), 16-SOIC package, voltage supply range (2V ~ 6V), output current (7.8mA), and operating temperature (-40°C ~ 85°C). The only difference is packaging format (Cut Tape vs. Digi-Reel), which does not affect circuit function or PCB assembly.
Q: What is the difference between the 74HC157, 74HC158, and 74HC257 series?
A: All three series provide 4 x 2:1 multiplexer functionality in the same 16-SOIC package with identical electrical specifications. The series designation reflects different internal logic configurations or pin arrangements. For the SN74HC157DT, equivalent parts within the 74HC158 and 74HC257 series are functionally compatible substitutes.
Q: Can I use the NXP 74HC157D,653 instead of the Texas Instruments SN74HC157DT?
A: Yes, with considerations. The 74HC157D,653 maintains the same circuit configuration and package but features reduced output current (5.2mA vs. 7.8mA) and an extended operating temperature range (-40°C ~ 125°C vs. -40°C ~ 85°C). If your application does not require the higher output current of the original part, this is a suitable substitute with enhanced temperature performance.
Q: Is the MC74HC157ADR2G from onsemi compatible with the SN74HC157DT?
A: Yes. The MC74HC157ADR2G provides equivalent circuit functionality and package specifications. It maintains the same 4 x 2:1 multiplexer configuration, 16-SOIC package, and voltage supply range. The onsemi part offers an extended operating temperature range (-55°C ~ 125°C), making it suitable for applications requiring broader temperature operation.
Q: What does "Last Time Buy" status mean for the SN74HC158DT?
A: "Last Time Buy" indicates that the manufacturer has announced end-of-life for this part. While inventory may still be available, no further production is planned. For new designs or long-term procurement, selecting an active product such as SN74HC157DR or SN74HC258DR is recommended.
Q: Are all substitute parts ROHS3 compliant?
A: The Texas Instruments parts (SN74HC157DR, SN74HC158DR, SN74HC158DT, SN74HC257DR, SN74HC257DT, SN74HC258DR) and the NXP parts (74HC157D,653, 74HC157D-Q100,118) are ROHS3 compliant. The onsemi MC74HC157ADR2G is also ROHS3 compliant. All parts maintain MSL 1 (Unlimited) moisture sensitivity level.
Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?
A: Cut Tape packaging provides individual components cut from a reel, suitable for manual assembly or small-volume production. Tape & Reel packaging maintains components on a continuous reel for automated pick-and-place assembly. Both formats contain identical components; the difference is in handling and assembly method. Select based on your production process requirements.
Q: Can I use the automotive-qualified 74HC157D-Q100,118 in non-automotive applications?
A: Yes. The 74HC157D-Q100,118 is AEC-Q100 qualified, meaning it meets automotive reliability standards. This qualification does not restrict its use in non-automotive applications; it simply indicates enhanced testing and quality assurance. This part is suitable for any application requiring high reliability.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts