MM74HC4049N Equivalent & Substitute Parts

Part Overview

The MM74HC4049N is a non-inverting buffer IC manufactured by onsemi, designed for logic signal buffering applications. This 6-element, single-bit buffer operates across a 2V to 6V supply range with push-pull output configuration in a 16-PDIP package. The product is classified as obsolete, making identification of functionally equivalent alternatives essential for system redesign, legacy system maintenance, and component sourcing continuity.

Substiute Parts

MM74HC4049N

onsemiIn Stock: 841MM74HC4049N Datasheet

Current PartRFQ

CD74HC4049E

Harris CorporationIn Stock: 6903CD74HC4049E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MM74HC4049N is determined by the following critical parameters:

• Logic Function: Buffer configuration (inverting or non-inverting)
• Element Count: 6 elements per package
• Bit Configuration: 1 bit per element
• Output Configuration: Push-pull output stage
• Supply Voltage Range: 2V to 6V compatibility
• Package Type: 16-PDIP form factor
• Series Compatibility: 74HC logic family

The CD74HC4049E is identified as a substitute part within the 74HC series. Both parts share the same base product number (74HC4049), package configuration (16-PDIP), and supply voltage specifications, enabling functional equivalence in applications requiring buffer functionality within the specified electrical and mechanical constraints.

Parameter Comparison

Engineering Selection Recommendations

Both the MM74HC4049N and CD74HC4049E are classified as obsolete products. Selection between these parts should be based on:

• Availability: Verify current inventory status with component suppliers, as both parts are legacy devices
• Compliance Requirements: The MM74HC4049N carries REACH Unaffected status. The CD74HC4049E is RoHS non-compliant. Applications subject to RoHS directives must account for this distinction
• Supply Chain Continuity: Given obsolete status, secure adequate stock quantities for production requirements
• Package Compatibility: Both parts utilize identical 16-PDIP through-hole packaging, ensuring mechanical interchangeability on PCB layouts

Frequently Asked Questions (FAQ)

Q: Can the CD74HC4049E directly replace the MM74HC4049N?

A: Both parts share the 74HC series designation, identical 16-PDIP package configuration, and base product number (74HC4049). Mechanical and electrical compatibility exists within the specified supply voltage range (2V to 6V) and operating temperature range (-40°C to 85°C). However, verify RoHS compliance requirements for your application, as the CD74HC4049E is RoHS non-compliant.

Q: What is the significance of the obsolete product status?

A: Obsolete classification indicates these parts are no longer in active production. Component sourcing must rely on existing inventory from distributors. Long-term availability cannot be guaranteed. For new designs, evaluation of current-production buffer alternatives within the 74HC logic family is recommended.

Q: Are the pin configurations identical between these parts?

A: Both parts utilize the 16-PDIP package format with 0.300" (7.62mm) spacing. Pin-to-pin compatibility is maintained, allowing direct substitution on through-hole PCB layouts without redesign.

Q: What compliance certifications apply to each part?

A: The MM74HC4049N carries REACH Unaffected status. The CD74HC4049E is RoHS non-compliant. Both parts share EAR99 export classification and 8542.39.0001 HTSUS code. Verify compliance requirements against your application's regulatory framework before selection.