MM74HC151N Equivalent & Substitute Parts

Part Overview

The MM74HC151N is a 1 x 8:1 multiplexer logic IC manufactured by onsemi in a 16-DIP package. This component functions as a data selector, routing one of eight input lines to a single output based on three address select lines. The MM74HC151N is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain functional equivalence through matching circuit configuration, electrical performance within acceptable tolerances, and compatible packaging.

Substiute Parts

MM74HC151N

onsemiIn Stock: 1789MM74HC151N Datasheet

Current PartRFQ

SN74HC151N

Texas InstrumentsIn Stock: 13532SN74HC151N Datasheet

DirectRFQ

CD74HC151E

Harris CorporationIn Stock: 1835CD74HC151E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MM74HC151N is determined by the following criteria:

Primary Substitution Requirements:

• Identical circuit configuration: 1 x 8:1 multiplexer topology
• Compatible package: 16-DIP form factor with 0.300" (7.62mm) pitch
• Matching voltage supply range: 2V ~ 6V operation
• Overlapping or equivalent operating temperature range

Secondary Compatibility Factors:

• Output current specifications must meet or exceed the original 5.2mA requirement
• Single supply voltage source architecture
• Through-hole mounting compatibility

Parts meeting all primary requirements are classified as direct substitutes. Parts with extended temperature ranges or enhanced electrical performance are classified as compatible alternatives.

Parameter Comparison

Engineering Selection Recommendations

SN74HC151N (Texas Instruments) is the primary substitute for the MM74HC151N. This part maintains identical circuit configuration and package specifications while offering active product status and ROHS3 compliance. The output current specification of 7.8mA exceeds the original 5.2mA requirement, providing enhanced drive capability. The matching operating temperature range of -40°C ~ 85°C ensures thermal compatibility in equivalent applications.

CD74HC151E (Harris Corporation) is a compatible alternative that matches the original output current specification of 5.2mA and maintains the 16-DIP package format. However, this part carries obsolete product status and RoHS non-compliance, limiting its suitability for new designs subject to environmental regulations. The extended operating temperature range of -55°C ~ 125°C provides broader thermal coverage for specialized applications.

For new production and designs requiring regulatory compliance, SN74HC151N is the recommended substitute. For legacy system maintenance where RoHS compliance is not required, CD74HC151E remains functionally equivalent.

Frequently Asked Questions (FAQ)

Q: Can SN74HC151N directly replace MM74HC151N in existing designs? A: Yes. Both parts share identical circuit configuration (1 x 8:1 multiplexer), package format (16-DIP), voltage supply range (2V ~ 6V), and operating temperature range (-40°C ~ 85°C). The SN74HC151N output current of 7.8mA exceeds the original specification, ensuring compatibility.

Q: What is the primary difference between SN74HC151N and CD74HC151E? A: Both are functionally equivalent 1 x 8:1 multiplexers in 16-DIP packages. The SN74HC151N has active product status and ROHS3 compliance, while CD74HC151E is obsolete and RoHS non-compliant. The CD74HC151E offers an extended operating temperature range (-55°C ~ 125°C) compared to SN74HC151N (-40°C ~ 85°C).

Q: Are there any package compatibility concerns when substituting these parts? A: No. All three parts use identical 16-DIP packaging with 0.300" (7.62mm) pitch. Through-hole mounting compatibility is maintained across all substitutes.

Q: Does the higher output current of SN74HC151N (7.8mA vs 5.2mA) affect circuit design? A: No negative impact. Higher output current provides enhanced drive capability and is backward compatible with designs specified for 5.2mA output. This represents an improvement in electrical performance.

Q: Which substitute should be selected for new product designs? A: SN74HC151N is the recommended choice for new designs due to active product status, ROHS3 compliance, and superior output current specification. CD74HC151E should be reserved for legacy system maintenance only.