MM74HC4049MTCX Equivalent & Substitute Parts

Part Overview

The MM74HC4049MTCX is a 6-element buffer integrated circuit with non-inverting logic configuration, manufactured by onsemi in a 16-TSSOP surface mount package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part operates across a 2V to 6V supply voltage range with push-pull output configuration suitable for logic-level signal buffering applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	MM74HC4049MTCX
Manufacturer	onsemi
Series	74HC
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)
Package / Case	16-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the MM74HC4049MTCX are identified based on the following critical parameters that determine functional compatibility:

Matching Parameters:

Series: 74HC (standard logic family)
Package / Case: 16-TSSOP (identical physical footprint)
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
Mounting Type: Surface Mount
Base Product Number: 74HC4049

Critical Difference: The substitute parts identified (CD74HC4049PWR, CD74HC4049PW, CD74HC4049PWT) feature inverting logic configuration, whereas the MM74HC4049MTCX is non-inverting. This represents a functional logic inversion and requires circuit-level evaluation for compatibility.

Parameter Comparison

Parameter	MM74HC4049MTCX (Main)	CD74HC4049PWR	CD74HC4049PW	CD74HC4049PWT
Manufacturer	onsemi	Texas Instruments	Texas Instruments	Texas Instruments
Logic Type	Buffer, Non-Inverting	Buffer, Inverting	Buffer, Inverting	Buffer, Inverting
Series	74HC	74HC	74HC	74HC
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
Package / Case	16-TSSOP	16-TSSOP	16-TSSOP	16-TSSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Obsolete	Discontinued at DiGi Electronics
Packaging	-	Tape & Reel (TR)	Tube	-
RoHS Status	-	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

CD74HC4049PWR is the primary substitute option. This part is manufactured by Texas Instruments with active product status, ensuring long-term availability and supply chain stability. It carries ROHS3 compliance certification and is supplied in Tape & Reel packaging suitable for automated assembly processes. The extended operating temperature range (-55°C ~ 125°C) provides broader environmental coverage compared to the original part.

CD74HC4049PW offers an alternative with identical electrical specifications but is supplied in Tube packaging and carries obsolete product status, limiting its suitability for new designs requiring sustained procurement.

CD74HC4049PWT is discontinued at DiGi Electronics and should not be selected for applications requiring ongoing component availability.

All three substitute parts share identical electrical parameters (voltage supply, output current, element count) and physical footprint with the MM74HC4049MTCX. The critical distinction is the inverting logic configuration, which requires circuit-level design consideration.

Frequently Asked Questions (FAQ)

Q: Can CD74HC4049PWR be used as a direct replacement for MM74HC4049MTCX?

A: Physical and electrical compatibility exists in terms of package footprint, pin count, supply voltage, output current, and operating temperature range. However, the CD74HC4049PWR implements inverting logic while the MM74HC4049MTCX is non-inverting. Direct substitution requires circuit modification to accommodate the logic inversion.

Q: What is the difference between the three substitute parts?

A: CD74HC4049PWR, CD74HC4049PW, and CD74HC4049PWT are electrically identical but differ in product status and packaging. CD74HC4049PWR is active with Tape & Reel packaging. CD74HC4049PW is obsolete with Tube packaging. CD74HC4049PWT is discontinued at DiGi Electronics. For new designs, CD74HC4049PWR is the recommended selection.

Q: Are all parts compatible with the same PCB footprint?

A: Yes. All substitute parts use the 16-TSSOP package with identical physical dimensions (0.173" width, 4.40mm). PCB layout and footprint files require no modification.

Q: What is the operating temperature difference between the main part and substitutes?

A: The MM74HC4049MTCX operates from -40°C to 85°C. The Texas Instruments substitutes (CD74HC4049PWR, CD74HC4049PW, CD74HC4049PWT) operate from -55°C to 125°C, providing extended temperature coverage at both lower and upper limits.

Q: Do the substitute parts meet RoHS compliance?

A: Yes. CD74HC4049PWR, CD74HC4049PW, and CD74HC4049PWT all carry ROHS3 compliance certification. The original MM74HC4049MTCX does not specify RoHS status in the provided data.

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