SN74ACT244NSRG4 Equivalent & Substitute Parts

Part Overview

The SN74ACT244NSRG4 is a Buffer, Non-Inverting logic IC manufactured by Texas Instruments, featuring 2 elements with 4 bits per element and 3-state output capability. This 20-SO surface mount device operates across a 4.5V to 5.5V supply range and is rated for -40°C to 85°C operating temperature. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing design requirements and procurement needs.

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	24mA, 24mA
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	20-SOIC
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the SN74ACT244NSRG4 is determined by strict equivalence across the following critical parameters: logic type (Buffer, Non-Inverting), number of elements (2), bits per element (4), output type (3-State), output current ratings (24mA high and low), supply voltage range (4.5V ~ 5.5V), operating temperature range (-40°C ~ 85°C), and surface mount package configuration (20-SOIC).

Substitute parts are grouped into two categories based on manufacturer and packaging format:

Texas Instruments Direct Equivalents: Parts maintaining identical electrical specifications and 20-SOIC package dimensions with alternative packaging formats (Tape & Reel or Cut Tape).

onsemi Manufacturer Equivalents: Parts with identical electrical specifications but different 20-SOIC package physical dimensions (0.295" width versus 0.209" width) and alternative packaging formats (Tube or Cut Tape).

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements	Bits/Element	Output Type	Current (mA)	Supply Voltage	Temp Range	Package Width	Product Status	Inventory
SN74ACT244NSRG4	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	0.209"	Discontinued	734 Pcs
SN74ACT241NSR	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	0.209"	Active	3400 Pcs
SN74ACT244NSR	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	0.209"	Active	2396 Pcs
74ACT244SC	onsemi	Buffer, Non-Inverting	2	4	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	0.295"	Active	1665 Pcs
74ACT244SCX	onsemi	Buffer, Non-Inverting	2	4	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	0.295"	Active	9458 Pcs

Engineering Selection Recommendations

For applications requiring the SN74ACT244NSRG4, the following selection criteria apply:

Texas Instruments SN74ACT241NSR and SN74ACT244NSR are direct electrical and mechanical equivalents with identical 0.209" package width. Both parts are currently active in production and ROHS3 compliant. SN74ACT244NSR maintains the same base product number as the original part, ensuring maximum design compatibility. SN74ACT241NSR offers higher inventory availability (3400 Pcs) and is suitable where packaging format flexibility is acceptable.

onsemi 74ACT244SC and 74ACT244SCX provide electrical equivalence with identical functional specifications. These parts feature a wider 0.295" package body and different moisture sensitivity levels (MSL 3 versus MSL 1). Both are active products with ROHS3 compliance. The 74ACT244SCX variant offers significantly higher inventory (9458 Pcs). PCB layout verification is required when substituting onsemi parts due to package width differences.

Selection priority should follow: (1) product status (active preferred over discontinued), (2) inventory availability, (3) package compatibility with existing PCB designs, (4) compliance certifications (all candidates meet ROHS3 and REACH requirements).

Frequently Asked Questions (FAQ)

Q: Can SN74ACT241NSR replace SN74ACT244NSRG4 directly?

A: Yes. Both parts share identical electrical specifications (2 elements, 4 bits per element, 3-State output, 24mA output current, 4.5V-5.5V supply, -40°C to 85°C operating range) and identical 20-SOIC package dimensions (0.209" width). The primary difference is packaging format (Tape & Reel versus the original format).

Q: What is the difference between Texas Instruments and onsemi substitute parts?

A: Texas Instruments parts (SN74ACT241NSR, SN74ACT244NSR) maintain the original 0.209" package width. onsemi parts (74ACT244SC, 74ACT244SCX) feature a 0.295" package width. All parts are electrically identical. PCB layout compatibility must be verified when switching manufacturers due to package body width differences.

Q: Are there any compliance or certification differences?

A: All substitute parts are ROHS3 compliant and REACH unaffected. Moisture sensitivity levels differ: Texas Instruments parts are MSL 1 (Unlimited), while onsemi parts are MSL 3 (168 Hours). This affects storage and handling requirements but does not impact electrical performance.

Q: Which substitute part has the best availability?

A: The 74ACT244SCX (onsemi) offers the highest inventory at 9458 Pcs. For Texas Instruments equivalents, SN74ACT241NSR provides 3400 Pcs availability.

Q: Can I use these parts interchangeably in my design?

A: Electrical interchangeability is confirmed across all substitute parts. Physical interchangeability depends on PCB layout: Texas Instruments parts (0.209" width) are directly interchangeable with the original. onsemi parts (0.295" width) require PCB layout verification before substitution.

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