SN74HC244PWT Equivalent & Substitute Parts

Part Overview

The SN74HC244PWT is a non-inverting buffer logic IC manufactured by Texas Instruments, featuring 2 elements with 4 bits per element and 3-state output capability. This device is classified as a 74HC series logic buffer in a 20-TSSOP surface mount package. The product status at DiGi Electronics is discontinued, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	SN74HC244PWT
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
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the SN74HC244PWT is determined by the following critical 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
Mounting Type: Surface Mount

Parts meeting all these electrical and mechanical specifications are classified as direct substitutes. Variations in operating temperature range, product status, or packaging format (tube, tape & reel, bulk) do not affect functional substitutability but may impact procurement and application requirements.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Product Status	Logic Type	Elements	Bits/Element	Output Type	Current (mA)	Voltage Supply	Temp Range (°C)	Package	Packaging Format
SN74HC244PWT	Texas Instruments	Discontinued	Buffer, Non-Inverting	2	4	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 85	20-TSSOP	Cut Tape (CT) & Digi-Reel®
SN74HC241PWR	Texas Instruments	Active	Buffer, Non-Inverting	2	4	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 85	20-TSSOP	Cut Tape (CT) & Digi-Reel®
SN74HC244PWR	Texas Instruments	Active	Buffer, Non-Inverting	2	4	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 85	20-TSSOP	Cut Tape (CT) & Digi-Reel®
MM74HC244MTC	Fairchild Semiconductor	Active	Buffer, Non-Inverting	2	4	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 85	20-TSSOP	Bulk
74HC244PW,112	Nexperia USA Inc.	Obsolete	Buffer, Non-Inverting	2	4	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 125	20-TSSOP	Tube
74HC244PW,118	NXP Semiconductors	Active	Buffer, Non-Inverting	2	4	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 125	20-TSSOP	Bulk
MC74HC244ADTG	onsemi	Active	Buffer, Non-Inverting	2	4	3-State	7.8 / 7.8	2V ~ 6V	-55 ~ 125	20-TSSOP	Tube
MC74HC244ADTR2G	onsemi	Active	Buffer, Non-Inverting	2	4	3-State	7.8 / 7.8	2V ~ 6V	-55 ~ 125	20-TSSOP	Tape & Reel (TR)
MM74HC244MTCX	onsemi	Active	Buffer, Non-Inverting	2	4	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 85	20-TSSOP	Tape & Reel (TR)

Engineering Selection Recommendations

All listed substitute parts meet the core electrical and mechanical specifications of the SN74HC244PWT. Selection should prioritize product status and compliance requirements:

Active Status Parts (recommended for new designs and ongoing procurement):

SN74HC241PWR (Texas Instruments)
SN74HC244PWR (Texas Instruments)
MM74HC244MTC (Fairchild Semiconductor)
74HC244PW,118 (NXP Semiconductors)
MC74HC244ADTG (onsemi)
MC74HC244ADTR2G (onsemi)
MM74HC244MTCX (onsemi)

Extended Temperature Range (for applications requiring -55°C to 125°C operation):

MC74HC244ADTG (onsemi)
MC74HC244ADTR2G (onsemi)

Packaging Format Considerations:

Cut Tape & Digi-Reel: SN74HC241PWR, SN74HC244PWR
Tube: 74HC244PW,112, MC74HC244ADTG
Tape & Reel: MC74HC244ADTR2G, MM74HC244MTCX
Bulk: MM74HC244MTC, 74HC244PW,118

All substitute parts carry ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original part specifications.

Frequently Asked Questions (FAQ)

Q: Can SN74HC244PWR be used as a direct replacement for SN74HC244PWT?

A: Yes. Both parts share identical electrical specifications (2 elements, 4 bits per element, 3-state output, 7.8mA output current, 2V–6V supply voltage) and the same 20-TSSOP package. The primary difference is product status: SN74HC244PWR is active, while SN74HC244PWT is discontinued.

Q: What is the difference between MC74HC244ADTG and MC74HC244ADTR2G?

A: Both parts are manufactured by onsemi with identical electrical specifications. The difference is packaging format: MC74HC244ADTG is supplied in tube format, while MC74HC244ADTR2G is supplied in tape & reel format. Electrical performance and pin configuration are identical.

Q: Are parts with extended temperature range (-55°C to 125°C) compatible with designs specified for -40°C to 85°C?

A: Yes. Parts with extended temperature ranges (MC74HC244ADTG and MC74HC244ADTR2G) are fully compatible with applications requiring standard -40°C to 85°C operation. The extended range provides additional operational margin without affecting performance within the standard range.

Q: Does packaging format (tube, tape & reel, bulk, cut tape) affect electrical compatibility?

A: No. Packaging format affects only procurement, handling, and assembly processes. All substitute parts in the same package type (20-TSSOP) are electrically and mechanically interchangeable regardless of packaging format.

Q: Which substitute part has the highest inventory availability?

A: SN74HC244PWR (Texas Instruments) has 55,400 pieces in stock, providing the highest availability among active substitute parts.

Q: Are all substitute parts RoHS3 compliant?

A: All listed substitute parts meet RoHS3 compliance requirements and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original SN74HC244PWT specifications.

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