SN74ACT244PWE4 Equivalent & Substitute Parts

Part Overview

The SN74ACT244PWE4 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 operates across a 4.5V to 5.5V supply range and is housed in a 20-TSSOP surface mount package. The part is currently discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	SN74ACT244PWE4
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	24mA, 24mA
Voltage - Supply	4.5V ~ 5.5V
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)
Product Status	Discontinued at DiGi Electronics

Substitute Part Grouping Explanation

Substitution for the SN74ACT244PWE4 is determined by strict equivalence across 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: 24mA, 24mA
Voltage - Supply: 4.5V ~ 5.5V
Operating Temperature: -40°C ~ 85°C (TA)
Package / Case: 20-TSSOP (0.173", 4.40mm Width)
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

All substitute parts listed maintain identical electrical specifications and mechanical compatibility. Variations exist only in packaging format (Cut Tape, Tube, or Tape & Reel) and manufacturer source, with differences in product status and inventory availability.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements	Bits/Element	Output Type	Current (mA)	Supply Voltage	Temp Range	Package	Packaging Format	Product Status	Inventory
SN74ACT244PWE4	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	-	Discontinued	867 Pcs
SN74ACT244PWR	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	Cut Tape & Digi-Reel	Active	45400 Pcs
SN74ACT244PW	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	Tube	Discontinued	2200 Pcs
74ACT244MTCX	onsemi	Buffer, Non-Inverting	2	4	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	Cut Tape & Digi-Reel	Active	1994 Pcs
MC74ACT244DTR2G	onsemi	Buffer, Non-Inverting	2	4	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	Tape & Reel	Active	125100 Pcs
74ACT244MTC	onsemi	Buffer, Non-Inverting	2	4	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	Tube	Active	4395 Pcs
SN74ACT241PW	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	Tube	Discontinued	1735 Pcs

Engineering Selection Recommendations

For applications requiring the SN74ACT244PWE4, the following selection criteria apply based on product status and compliance:

Primary Recommendation: SN74ACT244PWR (Texas Instruments) offers the highest availability with 45,400 units in stock and active product status. This part maintains identical electrical and mechanical specifications while offering Cut Tape and Digi-Reel packaging options suitable for both manual and automated assembly processes.

Alternative for High-Volume Production: MC74ACT244DTR2G (onsemi) provides the largest inventory at 125,100 units with active product status. Tape & Reel packaging is optimized for automated pick-and-place assembly. This part is functionally equivalent across all critical parameters.

Alternative for Tube Packaging: 74ACT244MTC (onsemi) is available in Tube format with 4,395 units in stock and active status, suitable for manual assembly or lower-volume applications.

All substitute parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can SN74ACT244PWR be used as a direct replacement for SN74ACT244PWE4?

A: Yes. Both parts are electrically and mechanically identical across all critical parameters: logic type, element count, bit configuration, output type, current ratings, supply voltage, operating temperature, and 20-TSSOP package. The only difference is packaging format and product status.

Q: What is the difference between the various packaging formats listed?

A: Packaging format refers to how the parts are supplied. Cut Tape & Digi-Reel format is suitable for automated assembly equipment. Tube format is used for manual assembly or lower-volume applications. Tape & Reel format is optimized for high-volume automated production. All formats contain electrically identical parts.

Q: Are onsemi parts (74ACT244MTCX, MC74ACT244DTR2G, 74ACT244MTC) fully compatible with the Texas Instruments original?

A: Yes. These parts meet identical electrical specifications and mechanical requirements. They are manufactured to the same 74ACT244 standard with equivalent performance across all rated parameters.

Q: Why is the original SN74ACT244PWE4 discontinued?

A: Product discontinuation is a standard industry practice. The SN74ACT244PWR variant remains active and provides equivalent functionality with superior availability.

Q: Which substitute part has the best availability?

A: MC74ACT244DTR2G (onsemi) has the highest inventory at 125,100 units. SN74ACT244PWR (Texas Instruments) is the second option with 45,400 units available.

Q: Do all substitute parts have the same RoHS and MSL ratings?

A: Yes. All listed substitute parts are ROHS3 compliant with MSL Level 1 (Unlimited) rating, meeting identical environmental and reliability standards.

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