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SN74HC157D Equivalent & Substitute Parts
Part Overview
The SN74HC157D is a 4 x 2:1 multiplexer logic integrated circuit manufactured by Texas Instruments in a 16-SOIC surface mount package. This component is currently discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production requirements. The 74HC157 series provides data selection and multiplexing functionality across multiple manufacturers and packaging options, with several active alternatives available in the market.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | SN74HC157D |
| Manufacturer | Texas Instruments |
| Type | Multiplexer 4 x 2:1 |
| Circuit Configuration | 4 x 2:1 |
| Independent Circuits | 1 |
| Current - Output High, Low | 7.8mA, 7.8mA |
| Voltage Supply | 2V ~ 6V |
| Operating Temperature | -40°C ~ 85°C |
| Package / Case | 16-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the SN74HC157D is determined by the following critical parameters:
Primary Substitution Criteria:
- Circuit configuration: 4 x 2:1 multiplexer topology
- Package type: 16-SOIC surface mount
- Voltage supply range: 2V ~ 6V
- Output current capability: 7.8mA (high and low)
- Operating temperature range: minimum -40°C, maximum 85°C or higher
- RoHS3 compliance and MSL Level 1 rating
Substitution Categories:
Direct Manufacturer Equivalents maintain identical electrical specifications and package format. These parts are pin-compatible and functionally interchangeable without circuit modification.
Upgrade Substitutes offer enhanced specifications such as extended operating temperature ranges (-40°C ~ 125°C) or improved output current characteristics (5.2mA), while maintaining the same 4 x 2:1 circuit configuration and 16-SOIC package. These parts provide superior performance margins.
Manufacturer Recommended Alternatives include automotive-grade variants with AEC-Q100 qualification, suitable for applications requiring automotive reliability standards.
Parametric Equivalents share the same functional circuit topology and package but may have different base product numbers (74HC158, 74HC257, 74HC258). These require functional verification for specific application requirements.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Circuit | Current Output (mA) | Voltage Supply | Operating Temp (°C) | Package | Product Status |
|---|---|---|---|---|---|---|---|
| SN74HC157D | Texas Instruments | 4 x 2:1 | 7.8 / 7.8 | 2V ~ 6V | -40 ~ 85 | 16-SOIC | Discontinued at DiGi Electronics |
| SN74HC157DR | Texas Instruments | 4 x 2:1 | 7.8 / 7.8 | 2V ~ 6V | -40 ~ 85 | 16-SOIC | Active |
| MC74HC157ADR2G | onsemi | 4 x 2:1 | 7.8 / 7.8 | 2V ~ 6V | -55 ~ 125 | 16-SOIC | Active |
| 74HC157D,652 | NXP Semiconductors | 4 x 2:1 | 5.2 / 5.2 | 2V ~ 6V | -40 ~ 125 | 16-SOIC | Active |
| 74HC157D,653 | Nexperia USA Inc. | 4 x 2:1 | 5.2 / 5.2 | 2V ~ 6V | -40 ~ 125 | 16-SOIC | Active |
| 74HC157D-Q100,118 | NXP USA Inc. | 4 x 2:1 | 5.2 / 5.2 | 2V ~ 6V | -40 ~ 125 | 16-SOIC | Active |
| MC74HC157ADG | onsemi | 4 x 2:1 | 7.8 / 7.8 | 2V ~ 6V | -55 ~ 125 | 16-SOIC | Active |
| SN74HC158D | Texas Instruments | 4 x 2:1 | 7.8 / 7.8 | 2V ~ 6V | -40 ~ 85 | 16-SOIC | Last Time Buy |
| SN74HC257D | Texas Instruments | 4 x 2:1 | 7.8 / 7.8 | 2V ~ 6V | -40 ~ 85 | 16-SOIC | Discontinued at DiGi Electronics |
| SN74HC258D | Texas Instruments | 4 x 2:1 | 7.8 / 7.8 | 2V ~ 6V | -40 ~ 85 | 16-SOIC | Last Time Buy |
Engineering Selection Recommendations
For Direct Replacement (No Design Changes Required): SN74HC157DR is the primary direct equivalent, manufactured by Texas Instruments with identical electrical specifications and active product status. This part maintains full compatibility with existing designs using SN74HC157D.
For Extended Temperature Range Applications: MC74HC157ADR2G (onsemi) and MC74HC157ADG (onsemi) extend the operating temperature range to -55°C ~ 125°C while maintaining the 7.8mA output current specification. These parts are suitable for industrial and wide-temperature applications.
For Automotive Applications: 74HC157D-Q100,118 (NXP USA Inc.) provides AEC-Q100 automotive qualification with extended temperature range (-40°C ~ 125°C). This variant is required for automotive-grade designs.
For Cost-Optimized Designs: 74HC157D,652 and 74HC157D,653 (NXP/Nexperia) offer reduced output current (5.2mA) with extended temperature range. These parts are suitable for applications where the lower output current meets system requirements.
For Parametric Equivalents: SN74HC158D, SN74HC257D, and SN74HC258D share the same 4 x 2:1 multiplexer topology and 16-SOIC package. These alternatives require functional verification to confirm compatibility with specific application logic requirements.
Frequently Asked Questions (FAQ)
Q: Can SN74HC157DR be used as a direct replacement for SN74HC157D? A: Yes. SN74HC157DR is manufactured by Texas Instruments with identical circuit configuration (4 x 2:1), output current (7.8mA), voltage supply range (2V ~ 6V), operating temperature (-40°C ~ 85°C), and 16-SOIC package. It is a direct pin-compatible substitute.
Q: What is the difference between the onsemi MC74HC157ADR2G and the Texas Instruments SN74HC157DR? A: Both parts maintain the same 4 x 2:1 multiplexer circuit, 7.8mA output current, and 16-SOIC package. The onsemi part extends the operating temperature range to -55°C ~ 125°C compared to -40°C ~ 85°C for the Texas Instruments part. Selection depends on application temperature requirements.
Q: Why do NXP parts (74HC157D,652 and 74HC157D,653) show lower output current (5.2mA)? A: The NXP variants maintain the same 4 x 2:1 multiplexer functionality and voltage supply range but specify 5.2mA output current instead of 7.8mA. These parts are suitable for applications where the lower output current meets system requirements and offer extended operating temperature range (-40°C ~ 125°C).
Q: Are SN74HC158D, SN74HC257D, and SN74HC258D compatible with SN74HC157D? A: These parts share the same 4 x 2:1 multiplexer topology, output current (7.8mA), voltage supply range (2V ~ 6V), and 16-SOIC package. However, they have different base product numbers (74HC158, 74HC257, 74HC258), which may indicate different internal logic configurations. Functional verification is required before substitution.
Q: Which substitute part is recommended for automotive applications? A: 74HC157D-Q100,118 (NXP USA Inc.) is the manufacturer-recommended automotive-grade variant with AEC-Q100 qualification. It provides extended operating temperature range (-40°C ~ 125°C) and is suitable for automotive reliability requirements.
Q: What packaging options are available for 74HC157 multiplexers? A: All listed substitute parts use the 16-SOIC (0.154", 3.90mm Width) surface mount package. Packaging variations include Cut Tape (CT), Digi-Reel, Tape & Reel (TR), Tube, and Bulk options, which affect ordering and handling but do not change electrical specifications or pin compatibility.
Q: Is the SN74HC157D RoHS compliant? A: Yes, SN74HC157D is ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited). All listed active substitute parts maintain ROHS3 compliance and MSL Level 1 rating.
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