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MM74HC151MX Equivalent & Substitute Parts
Part Overview
The MM74HC151MX is a 1 x 8:1 multiplexer logic IC manufactured by onsemi in 16-SOIC surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The MM74HC151MX operates from a single supply voltage of 2V to 6V with output currents of 5.2mA (high and low) and supports operating temperatures from -40°C to 85°C. Substitutes must maintain functional equivalence as a 1 x 8:1 multiplexer while meeting the electrical and mechanical specifications required for direct replacement or design adaptation.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Type | Multiplexer 1 x 8:1 |
| Independent Circuits | 1 |
| Voltage Supply | 2V ~ 6V (Single Supply) |
| Current - Output High, Low | 5.2mA, 5.2mA |
| Operating Temperature | -40°C ~ 85°C |
| Package / Case | 16-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Series | 74HC |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the MM74HC151MX is determined by the following critical parameters:
- Functional Type: Must be a 1 x 8:1 multiplexer or data selector with 1 independent circuit
- Package: Must be 16-SOIC surface mount (0.154", 3.90mm width)
- Voltage Supply: Must support 2V ~ 6V single supply operation
- Output Current: Minimum 5.2mA (high and low) required for electrical compatibility
- Mounting Type: Surface mount only
- Series Compatibility: 74HC logic family
Substitute parts are grouped into three categories based on availability and compliance status:
- Active Status Substitutes: Parts currently in production with full support
- Discontinued Status Substitutes: Parts no longer in active production but available in inventory
- Obsolete Status Substitutes: Legacy parts with limited availability
All substitute parts listed maintain the 16-SOIC package footprint and 1 x 8:1 multiplexer functionality required for direct or near-direct replacement.
Parameter Comparison
| Part Number | Manufacturer | Type | Circuit | Voltage Supply | Current Output (High/Low) | Operating Temp | Package | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| MM74HC151MX | onsemi | Multiplexer 1 x 8:1 | 1 | 2V ~ 6V | 5.2mA, 5.2mA | -40°C ~ 85°C | 16-SOIC | Obsolete | REACH Unaffected |
| MC74HC151ADR2G | onsemi | Data Selector/Multiplexer 1 x 8:1 | 1 | 2V ~ 6V | 5.2mA, 5.2mA | -55°C ~ 125°C | 16-SOIC | Active | ROHS3 Compliant |
| SN74HC151D | Texas Instruments | Multiplexer 1 x 8:1 | 1 | 2V ~ 6V | 7.8mA, 7.8mA | -40°C ~ 85°C | 16-SOIC | Discontinued at DiGi Electronics | ROHS3 Compliant |
| SN74HC151DE4 | Texas Instruments | Multiplexer 1 x 8:1 | 1 | 2V ~ 6V | 7.8mA, 7.8mA | -40°C ~ 85°C | 16-SOIC | Discontinued at DiGi Electronics | ROHS3 Compliant |
| SN74HC151DR | Texas Instruments | Multiplexer 1 x 8:1 | 1 | 2V ~ 6V | 7.8mA, 7.8mA | -40°C ~ 85°C | 16-SOIC | Active | ROHS3 Compliant |
| SN74HC151DT | Texas Instruments | Multiplexer 1 x 8:1 | 1 | 2V ~ 6V | 7.8mA, 7.8mA | -40°C ~ 85°C | 16-SOIC | Discontinued at DiGi Electronics | ROHS3 Compliant |
| SN74HC151QDRQ1 | Texas Instruments | Multiplexer 1 x 8:1 | 1 | 2V ~ 6V | 7.8mA, 7.8mA | -40°C ~ 125°C | 16-SOIC | Active | ROHS3 Compliant |
| 74HC151D,653 | Nexperia USA Inc. | Multiplexer 1 x 8:1 | 1 | 2V ~ 6V | 5.2mA, 5.2mA | -40°C ~ 125°C | 16-SOIC | Active | ROHS3 Compliant |
| CD74HC151M | Harris Corporation | Multiplexer 1 x 8:1 | 1 | 2V ~ 6V | 5.2mA, 5.2mA | -55°C ~ 125°C | 16-SOIC | Obsolete | RoHS non-compliant |
| CD74HC151M96 | Texas Instruments | Multiplexer 1 x 8:1 | 1 | 2V ~ 6V | 5.2mA, 5.2mA | -55°C ~ 125°C | 16-SOIC | Active | ROHS3 Compliant |
| CD74HC151MT | Texas Instruments | Multiplexer 1 x 8:1 | 1 | 2V ~ 6V | 5.2mA, 5.2mA | -55°C ~ 125°C | 16-SOIC | Discontinued at DiGi Electronics | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Recommendation - Active Status Parts:
MC74HC151ADR2G (onsemi) and SN74HC151DR (Texas Instruments) are the preferred substitutes. Both are active products with ROHS3 compliance and full manufacturer support. MC74HC151ADR2G maintains identical output current specifications (5.2mA) to the MM74HC151MX and extends the operating temperature range to -55°C ~ 125°C. SN74HC151DR offers higher output current capability (7.8mA) with the same temperature range as the original part (-40°C ~ 85°C).
Extended Temperature Range Option:
For applications requiring extended operating temperature coverage, CD74HC151M96 (Texas Instruments) provides -55°C ~ 125°C operation with 5.2mA output current and ROHS3 compliance. This part is currently active in production.
Automotive Grade Option:
SN74HC151QDRQ1 (Texas Instruments) is qualified to AEC-Q100 automotive standards with -40°C ~ 125°C operating range and 7.8mA output current. This part is suitable for automotive and high-reliability applications.
Alternative Active Source:
74HC151D,653 (Nexperia USA Inc.) provides an active alternative with 5.2mA output current, -40°C ~ 125°C operating range, and ROHS3 compliance.
Discontinued Parts:
SN74HC151D, SN74HC151DE4, SN74HC151DT, and CD74HC151MT are discontinued at DiGi Electronics but remain available in inventory. These parts are suitable only when existing stock is available and long-term procurement is not required.
Obsolete Parts:
CD74HC151M (Harris Corporation) is obsolete and RoHS non-compliant. This part should be avoided for new designs.
Frequently Asked Questions (FAQ)
Q: Can I use SN74HC151DR as a direct replacement for MM74HC151MX?
A: Yes. Both parts are 1 x 8:1 multiplexers in 16-SOIC packaging with 2V ~ 6V supply voltage. The SN74HC151DR has higher output current (7.8mA vs. 5.2mA), which is compatible with the original specification. The operating temperature range is identical (-40°C ~ 85°C).
Q: What is the difference between MC74HC151ADR2G and SN74HC151DR?
A: Both are active substitutes with identical functionality. MC74HC151ADR2G maintains the original 5.2mA output current and extends temperature range to -55°C ~ 125°C. SN74HC151DR provides 7.8mA output current with -40°C ~ 85°C temperature range. Choose based on your output current requirements and temperature specifications.
Q: Are all substitute parts RoHS compliant?
A: Most active and discontinued substitutes are ROHS3 compliant. CD74HC151M (obsolete, Harris Corporation) is RoHS non-compliant and should not be used in new designs. Verify RoHS status in the parameter comparison table for your selected part.
Q: Can I use parts with higher output current (7.8mA) in place of the original 5.2mA specification?
A: Yes. Higher output current capability is compatible with designs specified for 5.2mA. The part will deliver the required current without exceeding design limits. This applies to SN74HC151D, SN74HC151DE4, SN74HC151DR, SN74HC151DT, and SN74HC151QDRQ1.
Q: What packaging options are available for substitutes?
A: All substitute parts use 16-SOIC (0.154", 3.90mm width) surface mount packaging, maintaining footprint compatibility with the original MM74HC151MX. Packaging variants (Tube, Tape & Reel, Cut Tape) differ only in delivery format and do not affect electrical or mechanical compatibility.
Q: Is SN74HC151QDRQ1 suitable for automotive applications?
A: Yes. SN74HC151QDRQ1 is qualified to AEC-Q100 automotive standards and is the recommended choice for automotive-grade designs. It provides -40°C ~ 125°C operating range and 7.8mA output current.
Q: Should I avoid discontinued parts?
A: Discontinued parts (SN74HC151D, SN74HC151DE4, SN74HC151DT, CD74HC151MT) are available in current inventory but have no long-term production commitment. Use these only when existing stock is available and procurement continuity is not critical. For new designs, select from active status parts.
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