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MM74HC157M Equivalent & Substitute Parts
Part Overview
The MM74HC157M is a 4 x 2:1 multiplexer logic IC manufactured by onsemi in a 16-SOIC surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The MM74HC157M operates across a 2V to 6V supply range with output currents of 5.2mA (both high and low), suitable for general-purpose logic multiplexing applications in industrial and commercial environments.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Part Number | MM74HC157M |
| Manufacturer | onsemi |
| Circuit Configuration | 4 x 2:1 Multiplexer |
| Package Type | 16-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Voltage Supply Range | 2V ~ 6V |
| Output Current (High/Low) | 5.2mA / 5.2mA |
| Operating Temperature | -40°C ~ 85°C |
| Product Status | Obsolete |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the MM74HC157M is determined by the following critical parameters:
- Circuit configuration: 4 x 2:1 multiplexer topology
- Package type: 16-SOIC surface mount form factor
- Voltage supply compatibility: 2V ~ 6V operating range
- Output current capability: minimum 5.2mA (high and low)
- Operating temperature range: minimum -40°C ~ 85°C coverage
- Independent circuits: 1 circuit per package
Substitute parts are grouped into three categories based on their relationship to the main part: Similar (alternative manufacturers with comparable specifications), Direct (pin-compatible alternatives from different manufacturers), and Upgrade (active production parts with enhanced specifications or extended temperature ranges).
Parameter Comparison
| Part Number | Manufacturer | Circuit | Package | Voltage Supply | Output Current (H/L) | Temp Range | Status |
|---|---|---|---|---|---|---|---|
| MM74HC157M | onsemi | 4 x 2:1 | 16-SOIC | 2V ~ 6V | 5.2mA / 5.2mA | -40°C ~ 85°C | Obsolete |
| 74VHC157M | Fairchild Semiconductor | 4 x 2:1 | 16-SOIC | 2V ~ 5.5V | 8mA / 8mA | -40°C ~ 85°C | Active |
| MC74HC157ADG | onsemi | 4 x 2:1 | 16-SOIC | 2V ~ 6V | 7.8mA / 7.8mA | -55°C ~ 125°C | Active |
| MC74HC157ADR2G | onsemi | 4 x 2:1 | 16-SOIC | 2V ~ 6V | 7.8mA / 7.8mA | -55°C ~ 125°C | Active |
| NLV74HC157ADR2G | onsemi | 4 x 2:1 | 16-SOIC | 2V ~ 6V | 7.8mA / 7.8mA | -55°C ~ 125°C | Obsolete |
| SN74HC157DR | Texas Instruments | 4 x 2:1 | 16-SOIC | 2V ~ 6V | 7.8mA / 7.8mA | -40°C ~ 85°C | Active |
| SN74HC157DT | Texas Instruments | 4 x 2:1 | 16-SOIC | 2V ~ 6V | 7.8mA / 7.8mA | -40°C ~ 85°C | Discontinued |
| 74HC157D,652 | NXP Semiconductors | 4 x 2:1 | 16-SOIC | 2V ~ 6V | 5.2mA / 5.2mA | -40°C ~ 125°C | Active |
| 74HC157D,653 | Nexperia USA Inc. | 4 x 2:1 | 16-SOIC | 2V ~ 6V | 5.2mA / 5.2mA | -40°C ~ 125°C | Active |
| CD74HC157M | Harris Corporation | 4 x 2:1 | 16-SOIC | 2V ~ 6V | 5.2mA / 5.2mA | -55°C ~ 125°C | Obsolete |
| CD74HC157M96 | Harris Corporation | 4 x 2:1 | 16-SOIC | 2V ~ 6V | 5.2mA / 5.2mA | -55°C ~ 125°C | Obsolete |
Engineering Selection Recommendations
For new designs and ongoing production, active status parts are preferred. The 74HC157D,653 (Nexperia USA Inc.) and 74HC157D,652 (NXP Semiconductors) are recommended as primary substitutes, offering identical output current specifications to the MM74HC157M with extended operating temperature ranges (-40°C ~ 125°C) and active product status with RoHS3 compliance.
The MC74HC157ADR2G and MC74HC157ADG (onsemi) provide same-manufacturer continuity with enhanced output current (7.8mA) and extended temperature coverage (-55°C ~ 125°C), suitable for demanding industrial applications. Both carry RoHS3 compliance and active status.
The SN74HC157DR (Texas Instruments) is an active alternative with identical voltage and temperature specifications to the MM74HC157M, offering broad market availability and RoHS3 compliance.
The 74VHC157M (Fairchild Semiconductor) operates within a slightly reduced voltage range (2V ~ 5.5V) with higher output current (8mA), suitable for applications not requiring the full 6V upper limit.
Obsolete parts (NLV74HC157ADR2G, CD74HC157M, CD74HC157M96, SN74HC157DT) should be avoided for new designs unless existing inventory constraints require their use.
Frequently Asked Questions (FAQ)
Q: Can the MM74HC157M be directly replaced with any of these substitutes?
A: Yes, all listed substitutes maintain the 4 x 2:1 multiplexer circuit configuration and 16-SOIC package form factor. Pin compatibility is preserved across all alternatives. However, verify your application's voltage supply range and output current requirements before selection.
Q: What is the difference between similar, direct, and upgrade substitutes?
A: Similar substitutes are from alternative manufacturers with comparable electrical specifications. Direct substitutes are pin-compatible alternatives from different manufacturers. Upgrade substitutes are active production parts with enhanced specifications (higher output current, extended temperature range, or improved compliance status) compared to the original MM74HC157M.
Q: Does the voltage supply range difference between MM74HC157M (2V ~ 6V) and 74VHC157M (2V ~ 5.5V) affect compatibility?
A: The 74VHC157M operates within a narrower voltage range. If your application requires operation at 5.5V to 6V, the 74VHC157M is not suitable. For applications operating below 5.5V, the 74VHC157M is compatible.
Q: Why do some substitutes have higher output current ratings (7.8mA vs 5.2mA)?
A: Higher output current capability indicates improved drive strength. Parts with 7.8mA output current (MC74HC157ADG, MC74HC157ADR2G, SN74HC157DR) can drive heavier loads. This is a beneficial upgrade for applications requiring increased fan-out or lower impedance loads.
Q: Are there packaging differences between substitutes?
A: All substitutes use the 16-SOIC surface mount package with identical physical dimensions (0.154", 3.90mm width). Packaging variations listed (Bulk, Tube, Tape & Reel, Cut Tape) refer to supply format only and do not affect electrical or mechanical compatibility.
Q: Which substitute offers the best long-term availability?
A: The 74HC157D,653 (Nexperia USA Inc.) and 74HC157D,652 (NXP Semiconductors) are recommended for long-term designs. Both manufacturers maintain active production status, RoHS3 compliance, and extended temperature ranges, ensuring sustained supply and regulatory compliance.
Q: Can I use an obsolete substitute if I have existing inventory?
A: Obsolete parts (NLV74HC157ADR2G, CD74HC157M, CD74HC157M96, SN74HC157DT) are electrically compatible but carry supply risk. Use existing inventory only if procurement of active alternatives is not feasible. Plan migration to active parts for future production runs.
Q: What is the significance of the extended temperature range (-55°C ~ 125°C) in some substitutes?
A: Extended temperature ranges indicate qualification for wider environmental conditions. Parts like MC74HC157ADG, CD74HC157M, and CD74HC157M96 support operation from -55°C to 125°C, compared to the MM74HC157M's -40°C to 85°C range. This is beneficial for automotive, industrial, or extreme environment applications.
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