SN74HC244PWR Equivalent & Substitute Parts

Part Overview

The SN74HC244PWR is a non-inverting buffer logic IC manufactured by Texas Instruments, 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 with 55,400 units in stock.

Substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when sourcing from multiple manufacturers is needed for supply chain resilience. The 74HC244 logic family offers multiple qualified equivalents across different manufacturers and packaging options.

Key Parameters

Parameter	Value
Manufacturer Part Number	SN74HC244PWR
Manufacturer	Texas Instruments
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
Product Status	Active
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the SN74HC244PWR is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

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

Allowable Variations:

Manufacturer: Different manufacturers within the 74HC logic family
Operating Temperature Range: May extend beyond -40°C ~ 85°C (wider ranges are acceptable)
Packaging Format: Cut Tape (CT), Digi-Reel, Bulk, Tube, or Tape & Reel (TR)
Product Status: Active or Discontinued at DiGi Electronics (with inventory availability)

All substitute parts listed maintain identical electrical specifications and package dimensions, ensuring direct functional equivalence and PCB compatibility.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements / Bits	Output Type	Current (mA)	Supply Voltage	Temp Range (°C)	Package	Status	Inventory
SN74HC244PWR	Texas Instruments	Buffer, Non-Inverting	2 / 4	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 85	20-TSSOP	Active	55,400
SN74HC241PWR	Texas Instruments	Buffer, Non-Inverting	2 / 4	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 85	20-TSSOP	Active	2,000
SN74HC244PWT	Texas Instruments	Buffer, Non-Inverting	2 / 4	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 85	20-TSSOP	Discontinued at DiGi Electronics	1,191
MM74HC244MTC	Fairchild Semiconductor	Buffer, Non-Inverting	2 / 4	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 85	20-TSSOP	Active	1,638
74HC244PW,112	Nexperia USA Inc.	Buffer, Non-Inverting	2 / 4	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 125	20-TSSOP	Obsolete	994
74HC244PW,118	NXP Semiconductors	Buffer, Non-Inverting	2 / 4	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 125	20-TSSOP	Active	3,637
MC74HC244ADTG	onsemi	Buffer, Non-Inverting	2 / 4	3-State	7.8 / 7.8	2V ~ 6V	-55 ~ 125	20-TSSOP	Active	737
MC74HC244ADTR2G	onsemi	Buffer, Non-Inverting	2 / 4	3-State	7.8 / 7.8	2V ~ 6V	-55 ~ 125	20-TSSOP	Active	16,612
MM74HC244MTCX	onsemi	Buffer, Non-Inverting	2 / 4	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 85	20-TSSOP	Active	2,058

Engineering Selection Recommendations

Primary Substitutes (Active Status, Full Compliance):

MC74HC244ADTR2G (onsemi) is the recommended primary substitute, offering the highest inventory availability (16,612 units) with active product status. This part maintains full electrical equivalence and extends the operating temperature range to -55°C ~ 125°C, providing enhanced thermal margin. ROHS3 compliance and unlimited MSL rating ensure compatibility with modern manufacturing processes.

74HC244PW,118 (NXP Semiconductors) is an alternative active substitute with 3,637 units in stock. This part also extends the operating temperature range to -40°C ~ 125°C and maintains full electrical specifications.

Secondary Substitutes (Active Status, Limited Inventory):

SN74HC244PWT (Texas Instruments) maintains identical specifications to the primary part but is discontinued at DiGi Electronics with 1,191 units remaining. This option is suitable for immediate requirements but not recommended for long-term supply planning.

MM74HC244MTCX (onsemi) provides 2,058 units with active status and identical electrical specifications to the primary part.

Tertiary Options (Obsolete or Limited Availability):

74HC244PW,112 (Nexperia USA Inc.) is marked as obsolete with 994 units available. Use only when other substitutes are unavailable.

SN74HC241PWR (Texas Instruments) is a parametric equivalent with identical electrical specifications but represents a different base product number within the 74HC logic family. This part is active with 2,000 units in stock.

Frequently Asked Questions (FAQ)

Q: Can I use MC74HC244ADTR2G as a direct replacement for SN74HC244PWR?

A: Yes. Both parts are electrically identical with matching logic type, element configuration, output type, current ratings, and supply voltage specifications. Both are housed in the 20-TSSOP package. The MC74HC244ADTR2G extends the operating temperature range to -55°C ~ 125°C, which is a superset of the original -40°C ~ 85°C range, ensuring full compatibility.

Q: What is the difference between the packaging formats listed (Cut Tape, Bulk, Tube, Tape & Reel)?

A: These are different distribution and handling formats for the same electrical component. Cut Tape (CT) and Digi-Reel are suitable for automated pick-and-place assembly. Bulk packaging is used for high-volume manual assembly. Tube packaging is standard for component storage and manual handling. Tape & Reel (TR) is optimized for automated assembly lines. The electrical specifications and package dimensions remain identical across all formats.

Q: Are all substitute parts ROHS3 compliant?

A: Most substitute parts listed are ROHS3 compliant. Verify compliance documentation for specific parts if regulatory certification is required for your application. MC74HC244ADTG, MC74HC244ADTR2G, and MM74HC244MTCX are confirmed ROHS3 compliant.

Q: Can I substitute SN74HC241PWR for SN74HC244PWR?

A: SN74HC241PWR is a parametric equivalent with identical electrical specifications and package dimensions. However, it represents a different base product number (74HC241 versus 74HC244). Verify functional equivalence against your circuit design requirements before substitution, as the internal logic configuration may differ despite matching electrical parameters.

Q: What is the significance of the extended temperature range in MC74HC244ADTR2G (-55°C ~ 125°C)?

A: The extended temperature range indicates the part maintains specified electrical performance across a wider operating environment. This is beneficial for applications subject to extreme temperature conditions or for designs requiring thermal margin. The part remains fully compatible with applications designed for the standard -40°C ~ 85°C range.

Q: Which substitute offers the best inventory availability?

A: MC74HC244ADTR2G (onsemi) offers the highest inventory with 16,612 units in stock, combined with active product status and full electrical equivalence to the primary part.

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