74ABT244CMSAX Equivalent & Substitute Parts

Part Overview

The 74ABT244CMSAX is a non-inverting buffer logic IC manufactured by onsemi, featuring 2 elements with 4 bits per element and 3-state output capability. Housed in a 20-SSOP package, this component operates across a 4.5V to 5.5V supply voltage range with output drive capabilities of 32mA (high) and 64mA (low). The part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Manufacturer Part Number	74ABT244CMSAX
Manufacturer	onsemi
Logic Type	Buffer, Non-Inverting
Number of Elements	2
Number of Bits per Element	4
Output Type	3-State
Current - Output High, Low	32mA, 64mA
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	20-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 74ABT244CMSAX is determined by the following critical parameters:

Logic type and functional configuration (Buffer, Non-Inverting, 2 elements, 4 bits per element, 3-state output)
Electrical specifications (4.5V ~ 5.5V supply voltage, -40°C ~ 85°C operating temperature range)
Output drive current (32mA high, 64mA low)
Package compatibility (20-SSOP or 20-TSSOP form factors)
Product status (active alternatives required due to obsolescence)

Substitute parts are categorized as follows:

Direct Substitutes (20-SSOP Package): Parts maintaining identical package, pinout, and electrical specifications.

Package Variant Substitutes (20-TSSOP Package): Parts with equivalent electrical performance but in a thermally enhanced TSSOP package (0.173" width vs. 0.209" SSOP width).

Parametric Equivalents: Parts with matching functional and electrical parameters but different base product numbers.

Limited Compatibility Variants: Parts with reduced output current specifications or extended temperature ranges that may require application-level verification.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements / Bits	Output Type	Current (H/L)	Voltage Supply	Temp Range	Package	Product Status	RoHS Status
74ABT244CMSAX	onsemi	Buffer, Non-Inverting	2 / 4	3-State	32mA, 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-SSOP	Obsolete	N/A
SN74ABT244ADBR	Texas Instruments	Buffer, Non-Inverting	2 / 4	3-State	32mA, 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-SSOP	Active	ROHS3 Compliant
SN74ABT244ADB	Texas Instruments	Buffer, Non-Inverting	2 / 4	3-State	32mA, 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-SSOP	Active	ROHS3 Compliant
SN74ABT244AMDBREP	Texas Instruments	Buffer, Non-Inverting	2 / 4	3-State	24mA, 48mA	4.5V ~ 5.5V	-55°C ~ 125°C	20-SSOP	Active	ROHS3 Compliant
74ABT244PW,118	Nexperia USA Inc.	Buffer, Non-Inverting	2 / 4	3-State	32mA, 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	Active	ROHS3 Compliant
SN74ABT244APW	Texas Instruments	Buffer, Non-Inverting	2 / 4	3-State	32mA, 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	Active	ROHS3 Compliant
SN74ABT244APWR	Texas Instruments	Buffer, Non-Inverting	2 / 4	3-State	32mA, 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	Active	ROHS3 Compliant
SN74ABT2244ADBR	Texas Instruments	Buffer, Non-Inverting	2 / 4	3-State	32mA, 12mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-SSOP	Active	ROHS3 Compliant
SN74ABT2244APW	Texas Instruments	Buffer, Non-Inverting	2 / 4	3-State	32mA, 12mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	Active	ROHS3 Compliant
SN74ABT2244APWR	Texas Instruments	Buffer, Non-Inverting	2 / 4	3-State	32mA, 12mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	Active	ROHS3 Compliant
SN74ABT241ADBR	Texas Instruments	Buffer, Non-Inverting	2 / 4	3-State	32mA, 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-SSOP	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Direct Substitutes (Recommended for Pin-Compatible Replacement):

SN74ABT244ADBR and SN74ABT244ADB from Texas Instruments provide direct functional and electrical equivalence in the 20-SSOP package. Both parts maintain identical output drive specifications (32mA high, 64mA low) and operating parameters. SN74ABT244ADBR is supplied in Tape & Reel packaging, while SN74ABT244ADB is supplied in Tube packaging. Both are ROHS3 compliant and active products.

Package Variant Alternatives (20-TSSOP):

SN74ABT244APW and SN74ABT244APWR provide equivalent electrical performance in a thermally enhanced 20-TSSOP package (0.173" width). These parts are suitable for applications where PCB space optimization or thermal performance is beneficial. Both maintain 32mA/64mA output drive and are ROHS3 compliant active products.

74ABT244PW,118 from Nexperia USA Inc. offers an alternative 20-TSSOP option with identical electrical specifications and active product status.

Extended Temperature Range Option:

SN74ABT244AMDBREP extends the operating temperature range to -55°C ~ 125°C while reducing output drive current to 24mA (high) and 48mA (low). This variant is suitable for military or industrial temperature applications but requires verification that reduced output current meets circuit requirements.

Parametric Equivalents (Different Base Product Number):

SN74ABT241ADBR maintains identical electrical and package specifications but uses a different base product number (74ABT241 vs. 74ABT244). Functional compatibility requires application-level verification of pinout and signal routing.

Limited Compatibility Variants:

SN74ABT2244 series parts (ADBR, APW, APWR) feature reduced output low current (12mA vs. 64mA). These parts are suitable only for applications with reduced current drive requirements and require circuit-level analysis before substitution.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT244ADBR directly replace 74ABT244CMSAX without PCB modifications?

A: Yes. SN74ABT244ADBR maintains identical pinout, package dimensions (20-SSOP), and electrical specifications (32mA/64mA output drive, 4.5V ~ 5.5V supply, -40°C ~ 85°C operating range). No PCB layout changes are required.

Q: What is the difference between 20-SSOP and 20-TSSOP packages?

A: Both are 20-pin surface mount packages with identical pinouts. The 20-SSOP measures 0.209" width, while the 20-TSSOP measures 0.173" width. The TSSOP variant provides improved thermal performance and reduced PCB footprint. Substitution requires PCB redesign due to different land pattern dimensions.

Q: Are all substitute parts ROHS3 compliant?

A: All active substitute parts listed are ROHS3 compliant. The original 74ABT244CMSAX does not specify RoHS status due to its obsolete classification.

Q: Can SN74ABT2244ADBR be used as a direct replacement?

A: No. While functionally similar, SN74ABT2244ADBR reduces output low current from 64mA to 12mA. Substitution requires circuit analysis to confirm that reduced current drive meets load requirements.

Q: What is the inventory status of substitute parts?

A: SN74ABT244APWR has the highest availability at 17,100 pieces. SN74ABT244ADBR provides 4,200 pieces. All listed substitutes are active products with current manufacturing support.

Q: Does the extended temperature range variant (SN74ABT244AMDBREP) affect circuit performance?

A: The extended range (-55°C ~ 125°C) does not affect performance within the original operating range (-40°C ~ 85°C). However, reduced output current (24mA/48mA vs. 32mA/64mA) requires verification that circuit load impedance remains compatible.

Q: Which substitute offers the best long-term availability?

A: Texas Instruments SN74ABT244 variants (ADBR, ADB, APW, APWR) are active products with established manufacturing continuity. These parts are recommended for new designs requiring long-term supply assurance.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message