MM74HC244MTCX Equivalent & Substitute Parts

Part Overview

The MM74HC244MTCX is a non-inverting buffer logic IC manufactured by onsemi, designed for 2-element, 4-bit per element configurations with 3-state output capability. This device operates across a 2V to 6V supply voltage range and is housed in a 20-TSSOP surface mount package. The part is currently active in production status with ROHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are necessary when the MM74HC244MTCX becomes unavailable due to supply constraints, when alternative packaging formats are required for manufacturing processes, or when extended operating temperature ranges or automotive-grade qualifications are needed for specific applications.

Key Parameters

Parameter	Value
Logic Type	Buffer, Non-Inverting
Number of Elements	2
Number of Bits per Element	4
Output Type	3-State
Current - Output High, Low	7.8mA, 7.8mA
Voltage - Supply	2V ~ 6V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	20-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the MM74HC244MTCX is determined by the following critical parameters:

Core Functional Parameters (Must Match):

Logic Type: Buffer, Non-Inverting
Number of Elements: 2
Number of Bits per Element: 4
Output Type: 3-State
Current - Output High, Low: 7.8mA, 7.8mA
Voltage - Supply: 2V ~ 6V
Package / Case: 20-TSSOP (0.173", 4.40mm Width)
Mounting Type: Surface Mount

Variable Parameters (Allowed Differences):

Operating Temperature Range: May extend beyond -40°C ~ 85°C
Packaging Format: Tape & Reel (TR), Tube, Cut Tape (CT) & Digi-Reel®, or Bulk
Manufacturer: onsemi, Texas Instruments, Nexperia USA Inc., or NXP Semiconductors
Product Status: Active or Obsolete
Grade/Qualification: Standard or Automotive (AEC-Q100)

All substitute parts listed maintain identical electrical performance and mechanical compatibility within the 20-TSSOP package footprint.

Parameter Comparison

Part Number	Manufacturer	Packaging	Operating Temperature	Product Status	Grade	Inventory (Pcs)
MM74HC244MTCX	onsemi	Tape & Reel (TR)	-40°C ~ 85°C	Active	Standard	2058
MC74HC244ADTG	onsemi	Tube	-55°C ~ 125°C	Active	Standard	737
MC74HC244ADTR2G	onsemi	Tape & Reel (TR)	-55°C ~ 125°C	Active	Standard	16612
NLV74HC244ADTR2G	onsemi	Cut Tape (CT) & Digi-Reel®	-55°C ~ 125°C	Obsolete	Automotive (AEC-Q100)	3014
SN74HC244PW	Texas Instruments	Tube	-40°C ~ 85°C	Discontinued at DiGi Electronics	Standard	3009
SN74HC244PWR	Texas Instruments	Cut Tape (CT) & Digi-Reel®	-40°C ~ 85°C	Active	Standard	55400
SN74HC244QPWRG4Q1	Texas Instruments	Cut Tape (CT) & Digi-Reel®	-40°C ~ 125°C	Active	Automotive (AEC-Q100)	3190
SN74HC244QPWREP	Texas Instruments	Tape & Reel (TR)	-40°C ~ 125°C	Active	Standard	911
74HC244PW,112	Nexperia USA Inc.	Tube	-40°C ~ 125°C	Obsolete	Standard	994
74HC244PW,118	NXP Semiconductors	Bulk	-40°C ~ 125°C	Active	Standard	3637
SN74HC241PWR	Texas Instruments	Cut Tape (CT) & Digi-Reel®	-40°C ~ 85°C	Active	Standard	2000

Engineering Selection Recommendations

Direct Substitutes (Identical Operating Temperature Range):

For applications requiring the standard -40°C ~ 85°C operating temperature range with active product status, SN74HC244PWR (Texas Instruments) is the primary alternative. This part maintains identical electrical specifications and thermal performance while offering significantly higher inventory availability (55,400 units) in Cut Tape & Digi-Reel® packaging format.

Extended Temperature Range Substitutes:

When applications require operation across -55°C ~ 125°C, MC74HC244ADTR2G (onsemi) provides the widest temperature coverage with active status and Tape & Reel packaging. This part is suitable for industrial and extended-range applications while maintaining ROHS3 compliance.

Automotive-Grade Alternatives:

For automotive applications requiring AEC-Q100 qualification, two options are available: SN74HC244QPWRG4Q1 (Texas Instruments, active status) and NLV74HC244ADTR2G (onsemi, obsolete status). SN74HC244QPWRG4Q1 is the recommended choice due to active production status and extended temperature range (-40°C ~ 125°C).

Packaging Format Considerations:

Tape & Reel (TR): MC74HC244ADTR2G, SN74HC244QPWREP, MM74HC244MTCX
Cut Tape (CT) & Digi-Reel®: SN74HC244PWR, SN74HC244QPWRG4Q1, NLV74HC244ADTR2G
Tube: MC74HC244ADTG, SN74HC244PW, 74HC244PW,112
Bulk: 74HC244PW,118

All listed parts maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Frequently Asked Questions (FAQ)

Q: Can I substitute MM74HC244MTCX with SN74HC241PWR?

A: SN74HC241PWR is a parametric equivalent with identical electrical performance and operating temperature range. However, it uses base product number 74HC241 rather than 74HC244. Verify pinout and functional compatibility with your specific circuit design before implementation.

Q: What is the difference between MC74HC244ADTR2G and MM74HC244MTCX?

A: Both parts are non-inverting buffers with identical electrical specifications. The primary differences are: MC74HC244ADTR2G operates across -55°C ~ 125°C (extended range) versus MM74HC244MTCX at -40°C ~ 85°C, and MC74HC244ADTR2G is supplied in Tape & Reel packaging with higher inventory (16,612 units). Electrical performance is identical within the MM74HC244MTCX operating range.

Q: Are automotive-grade parts (AEC-Q100) backward compatible with standard applications?

A: Yes. Automotive-grade parts such as SN74HC244QPWRG4Q1 and NLV74HC244ADTR2G meet or exceed all standard specifications and can be used in non-automotive applications. They provide additional qualification and extended temperature range coverage.

Q: What packaging format should I select for high-volume manufacturing?

A: Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® formats are optimized for automated assembly. MC74HC244ADTR2G and SN74HC244PWR offer the highest inventory levels in these formats. Tube and Bulk formats are suitable for lower-volume or manual assembly processes.

Q: Why is SN74HC244PW listed as discontinued?

A: SN74HC244PW is discontinued at DiGi Electronics but remains available through alternative distribution channels with 3,009 units in stock. For new designs, SN74HC244PWR (active status, 55,400 units) is the recommended Texas Instruments alternative.

Q: Do all substitute parts maintain ROHS3 compliance?

A: All listed substitute parts are ROHS3 compliant with unlimited moisture sensitivity level (MSL 1), matching the compliance profile of MM74HC244MTCX.

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