MM74HC4049M Equivalent & Substitute Parts

Part Overview

The MM74HC4049M is a non-inverting buffer logic IC manufactured by onsemi, featuring 6 elements with 1 bit per element and push-pull output configuration. This component operates across a 2V to 6V supply voltage range and is housed in a 16-SOIC package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

MM74HC4049M

onsemiIn Stock: 2263MM74HC4049M Datasheet

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74HC4049D,653

Nexperia USA Inc.In Stock: 241674HC4049D,653 Datasheet

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CD74HC4049M

Texas InstrumentsIn Stock: 2086CD74HC4049M Datasheet

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CD74HC4049M96

Texas InstrumentsIn Stock: 1653CD74HC4049M96 Datasheet

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CD74HC4049MT

Texas InstrumentsIn Stock: 1946CD74HC4049MT Datasheet

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CD74HC4049NSR

Texas InstrumentsIn Stock: 3166CD74HC4049NSR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MM74HC4049M are identified based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Series: 74HC (same logic family)
• Number of Elements: 6
• Number of Bits per Element: 1
• Output Type: Push-Pull
• Current - Output High, Low: 5.2mA, 5.2mA
• Voltage - Supply: 2V ~ 6V
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount

Substitution Categories:

Upgrade Substitutes (Direct functional replacements with enhanced specifications):

• CD74HC4049M (Texas Instruments, Tube packaging)
• CD74HC4049M96 (Texas Instruments, Tape & Reel packaging)
• CD74HC4049MT (Texas Instruments, Tape & Reel packaging)
• 74HC4049D,653 (Nexperia USA Inc., Tape & Reel packaging)

Similar Substitute (Package variant with same electrical specifications):

• CD74HC4049NSR (Texas Instruments, 16-SO package variant)

Parameter Comparison

Engineering Selection Recommendations

For Active Production Requirements: CD74HC4049M96 is the primary recommendation. This part maintains identical electrical specifications to the MM74HC4049M, operates across the full -55°C to 125°C temperature range, carries Active product status, and is available in Tape & Reel packaging suitable for automated assembly. ROHS3 compliance is confirmed.

For Extended Temperature Range Applications: CD74HC4049M and CD74HC4049MT both provide -55°C to 125°C operating range, exceeding the original -40°C to 85°C specification. Both are ROHS3 compliant. CD74HC4049M is available in Tube packaging; CD74HC4049MT is available in Tape & Reel format.

For Immediate Availability: CD74HC4049NSR offers the highest current inventory (3100 pcs) with Active product status and ROHS3 compliance. Note that this part uses a 16-SO package variant with 0.209" width versus the standard 0.154" width, requiring PCB layout verification for pin-to-pin compatibility.

For Cost-Optimized Procurement: 74HC4049D,653 (Nexperia USA Inc.) provides an Active status alternative with ROHS3 compliance and adequate inventory. Operating temperature extends to 125°C. Tape & Reel packaging is standard.

Avoid for New Designs: CD74HC4049M and CD74HC4049MT carry Last Time Buy status, indicating limited future availability. These are suitable only for legacy system support or end-of-life production runs.

Frequently Asked Questions (FAQ)

Q: Can I use an inverting buffer substitute in place of the non-inverting MM74HC4049M? A: No. The MM74HC4049M is a non-inverting buffer, while all listed substitutes (except the original part) are inverting buffers. Logic inversion changes signal polarity and will cause functional failure unless the circuit design is modified to accommodate the inverted output. Substitution requires circuit-level analysis and redesign.

Q: What is the difference between the 16-SOIC and 16-SO packages listed for CD74HC4049NSR? A: Both are surface-mount packages with 16 pins, but differ in body width: 16-SOIC is 0.154" (3.90mm) wide, while 16-SO is 0.209" (5.30mm) wide. The CD74HC4049NSR uses the wider 16-SO variant. PCB footprint compatibility must be verified before substitution, as the wider package may not fit existing 16-SOIC landing patterns.

Q: Why do substitute parts have higher operating temperature ranges? A: Substitute parts from Texas Instruments and Nexperia are specified for -55°C to 125°C operation, compared to the original -40°C to 85°C range. This reflects modern manufacturing standards and does not indicate a functional difference. The wider temperature range provides additional design margin for applications requiring extended environmental performance.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All substitute parts listed carry ROHS3 compliance certification. The original MM74HC4049M does not specify RoHS status in available documentation.

Q: What packaging format should I select for high-volume production? A: Tape & Reel (TR) packaging is standard for automated assembly lines. CD74HC4049M96 and CD74HC4049MT are available in Tape & Reel format. Tube packaging (CD74HC4049M) is suitable for manual assembly or lower-volume applications.

Q: Is CD74HC4049M96 a direct replacement for MM74HC4049M? A: CD74HC4049M96 matches all critical electrical parameters (6 elements, 1 bit per element, 5.2mA output current, 2V-6V supply, push-pull output) and uses the same 16-SOIC package. However, it is an inverting buffer versus the non-inverting original. Circuit-level compatibility assessment is required before substitution.

Q: What is the inventory status for each substitute? A: CD74HC4049NSR has the highest inventory at 3100 pcs. CD74HC4049M96 has 1641 pcs, CD74HC4049MT has 1883 pcs, CD74HC4049M has 2000 pcs, and 74HC4049D,653 has 2316 pcs. All parts are listed as new original stock.