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CD74HCT151M Equivalent & Substitute Parts
Part Overview
The CD74HCT151M is a 1 x 8:1 multiplexer logic integrated circuit manufactured by Texas Instruments in a 16-SOIC surface mount package. This part operates with a single supply voltage of 4.5V to 5.5V and supports an operating temperature range of -55°C to 125°C. The CD74HCT151M is designated as Last Time Buy, indicating limited availability and the necessity to identify equivalent substitute components for ongoing design requirements and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Type | Multiplexer |
| Circuit Configuration | 1 x 8:1 |
| Output Current (High/Low) | 4mA / 4mA |
| Supply Voltage Range | 4.5V ~ 5.5V |
| Operating Temperature Range | -55°C ~ 125°C |
| Package Type | 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 of the CD74HCT151M is determined by strict equivalence across the following parameters: multiplexer type (1 x 8:1 configuration), output current specifications (4mA high and low), supply voltage range (4.5V ~ 5.5V), operating temperature range, package type (16-SOIC), and mounting method (surface mount). Parts meeting these criteria are classified as direct parametric equivalents. Additional considerations include product status (active vs. obsolete), RoHS compliance certification, and packaging format (tube, bulk, or tape & reel). Automotive-grade variants with AEC-Q100 qualification represent specialized substitutes for applications requiring automotive qualification.
Parameter Comparison
| Part Number | Manufacturer | Circuit | Output Current (mA) | Supply Voltage (V) | Temp Range (°C) | Package | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|
| CD74HCT151M | Texas Instruments | 1 x 8:1 | 4 / 4 | 4.5 ~ 5.5 | -55 ~ 125 | 16-SOIC | Last Time Buy | ROHS3 Compliant |
| CD74HCT151M96 | Harris Corporation | 1 x 8:1 | 4 / 4 | 4.5 ~ 5.5 | -55 ~ 125 | 16-SOIC | Obsolete | RoHS Non-compliant |
| CD74HCT251M | Harris Corporation | 1 x 8:1 | 4 / 4 | 4.5 ~ 5.5 | -55 ~ 125 | 16-SOIC | Obsolete | RoHS Non-compliant |
| 74HCT151D/AUJ | Nexperia USA Inc. | 1 x 8:1 | 4 / 4 | 4.5 ~ 5.5 | -40 ~ 125 | 16-SOIC | Active | ROHS3 Compliant |
| 74HCT151D,653 | Nexperia USA Inc. | 1 x 8:1 | 4 / 4 | 4.5 ~ 5.5 | -40 ~ 125 | 16-SOIC | Active | ROHS3 Compliant |
| 74HCT151D-Q100,118 | Nexperia USA Inc. | 1 x 8:1 | 4 / 4 | 4.5 ~ 5.5 | -40 ~ 125 | 16-SOIC | Active | ROHS3 Compliant |
Engineering Selection Recommendations
For applications requiring continued supply and compliance with current environmental standards, the Nexperia USA Inc. variants 74HCT151D/AUJ and 74HCT151D,653 are preferred substitutes. Both parts maintain active product status, ROHS3 compliance, and identical electrical specifications to the CD74HCT151M with the exception of a narrower operating temperature range (-40°C to 125°C versus -55°C to 125°C). The 74HCT151D,653 variant is supplied in tape & reel packaging with higher inventory availability (3453 units), making it suitable for high-volume production environments.
For automotive applications requiring AEC-Q100 qualification, the 74HCT151D-Q100,118 variant from Nexperia USA Inc. provides the necessary certification while maintaining electrical and package compatibility.
The CD74HCT151M96 and CD74HCT251M variants from Harris Corporation are obsolete and RoHS non-compliant, limiting their suitability for new designs or applications subject to environmental regulations.
Frequently Asked Questions (FAQ)
Q: Can the 74HCT151D/AUJ directly replace the CD74HCT151M in existing designs?
A: Yes, the 74HCT151D/AUJ is a direct parametric equivalent with identical circuit configuration (1 x 8:1), output current (4mA), supply voltage range (4.5V ~ 5.5V), and package type (16-SOIC). The operating temperature range is narrower (-40°C to 125°C versus -55°C to 125°C), which must be verified against application requirements.
Q: What is the difference between 74HCT151D/AUJ and 74HCT151D,653?
A: Both parts are electrically identical with the same circuit configuration, output current, supply voltage, and operating temperature specifications. The primary difference is packaging format: 74HCT151D/AUJ is supplied in standard packaging, while 74HCT151D,653 is supplied in tape & reel (TR) format for automated assembly processes.
Q: Is the CD74HCT251M a suitable substitute for the CD74HCT151M?
A: The CD74HCT251M meets all electrical and package specifications for substitution. However, it is designated as obsolete and RoHS non-compliant, making it unsuitable for new designs or applications subject to environmental regulations.
Q: What does the AEC-Q100 qualification on the 74HCT151D-Q100,118 indicate?
A: AEC-Q100 qualification indicates that the 74HCT151D-Q100,118 meets automotive industry reliability and quality standards. This variant is suitable for automotive applications requiring formal qualification documentation.
Q: Are there packaging considerations when substituting the CD74HCT151M?
A: The CD74HCT151M is supplied in tube packaging. Substitute parts are available in tube (CD74HCT251M), bulk (CD74HCT151M96), and tape & reel (74HCT151D,653, 74HCT151D-Q100,118) formats. Packaging selection depends on production volume and assembly process requirements.
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