MM74HC4049MTC Equivalent & Substitute Parts

Part Overview

The MM74HC4049MTC is a 6-element non-inverting buffer logic IC manufactured by onsemi, housed in a 16-TSSOP surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The part operates across a 2V to 6V supply voltage range with push-pull output configuration, suitable for general-purpose logic buffering applications in digital circuits.

Key Parameters

Parameter	Value
Manufacturer Part Number	MM74HC4049MTC
Manufacturer	onsemi
Logic Type	Buffer, Non-Inverting
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
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	16-TSSOP (0.173", 4.40mm Width)
Series	74HC
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the MM74HC4049MTC are identified based on the following allowed electrical and mechanical parameters:

Package compatibility: 16-TSSOP surface mount form factor
Series alignment: 74HC logic family
Output current capability: 5.2mA high and low
Supply voltage range: 2V ~ 6V
Number of elements and bits per element: 6 elements, 1 bit per element
Output configuration: Push-pull topology
Mounting type: Surface mount

The substitute parts identified operate within these electrical and mechanical boundaries. Note that substitute parts CD74HC4049PW, CD74HC4049PWR, and CD74HC4049PWT feature inverting logic (Buffer, Inverting) rather than non-inverting logic. These parts maintain identical electrical performance characteristics, package dimensions, and supply voltage specifications, making them functionally compatible at the hardware level when logic inversion is acceptable within the circuit design.

Parameter Comparison

Parameter	MM74HC4049MTC (onsemi)	CD74HC4049PW (TI)	CD74HC4049PWR (TI)	CD74HC4049PWT (TI)
Logic Type	Buffer, Non-Inverting	Buffer, Inverting	Buffer, Inverting	Buffer, Inverting
Number of Elements	6	6	6	6
Number of Bits per Element	1	1	1	1
Output Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Current - Output High, Low	5.2mA, 5.2mA	5.2mA, 5.2mA	5.2mA, 5.2mA	5.2mA, 5.2mA
Voltage - Supply	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V
Operating Temperature	-40°C ~ 85°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	16-TSSOP	16-TSSOP	16-TSSOP	16-TSSOP
Series	74HC	74HC	74HC	74HC
Product Status	Obsolete	Obsolete	Active	Discontinued at DiGi Electronics
RoHS Status	REACH Unaffected	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

CD74HC4049PWR (Texas Instruments) is the primary substitute option. This part carries Active product status, ensuring long-term availability and supply chain stability. It holds ROHS3 compliance certification and maintains identical electrical specifications and 16-TSSOP packaging to the MM74HC4049MTC. The extended operating temperature range (-55°C ~ 125°C) provides broader environmental coverage compared to the original part.

CD74HC4049PW (Texas Instruments) serves as a secondary substitute with equivalent electrical and mechanical specifications. This part is classified as Obsolete, which may impact future procurement availability.

CD74HC4049PWT (Texas Instruments) is available in limited inventory (701 pcs) and is discontinued at DiGi Electronics, making it a tertiary option for applications requiring immediate component sourcing from existing stock only.

All three substitute parts feature inverting logic functionality. Circuit designs must accommodate this logic inversion or include additional inverting stages to maintain intended signal flow.

Frequently Asked Questions (FAQ)

Q: Can CD74HC4049PW, CD74HC4049PWR, and CD74HC4049PWT directly replace MM74HC4049MTC?

A: These parts are mechanically and electrically compatible at the package and pin level. However, they feature inverting logic (Buffer, Inverting) while the MM74HC4049MTC is non-inverting (Buffer, Non-Inverting). Direct substitution requires circuit design verification to confirm that logic inversion is acceptable or compensated within the application.

Q: What are the key differences between the three Texas Instruments substitutes?

A: All three parts share identical electrical specifications and 16-TSSOP packaging. The primary differences are product status and packaging format. CD74HC4049PWR is Active status with Tape & Reel packaging. CD74HC4049PW is Obsolete with Tube packaging. CD74HC4049PWT is Discontinued at DiGi Electronics with unspecified packaging.

Q: Does operating temperature range affect substitution compatibility?

A: The substitute parts operate across -55°C ~ 125°C, which encompasses the MM74HC4049MTC range of -40°C ~ 85°C. This extended range provides additional environmental margin and does not restrict substitution based on temperature specifications.

Q: Are there compliance or certification differences?

A: The MM74HC4049MTC is REACH Unaffected. All three substitute parts are ROHS3 Compliant. Both designations are acceptable for most applications; however, specific regulatory requirements for your end application must be verified.

Q: What packaging options are available for the substitutes?

A: CD74HC4049PWR is supplied in Tape & Reel format. CD74HC4049PW is supplied in Tube format. CD74HC4049PWT packaging format is not specified in available data. Packaging selection depends on assembly process requirements and order quantity.

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