74ACT244PC Equivalent & Substitute Parts

Part Overview

The 74ACT244PC is a non-inverting buffer logic integrated circuit manufactured by onsemi, designed for 2-element, 4-bit per element configurations with 3-state output capability. This device operates across a 4.5V to 5.5V supply range and is housed in a 20-pin DIP package suitable for through-hole mounting applications.

The 74ACT244PC is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production or maintenance requirements for systems utilizing this logic buffer architecture.

Key Parameters

Parameter	Specification
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)
Mounting Type	Through Hole
Package / Case	20-DIP (0.300", 7.62mm)
Series	74ACT

Substitute Part Grouping Explanation

Substitute parts for the 74ACT244PC are qualified based on strict electrical and mechanical parameter alignment:

Primary Substitution Criteria:

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)
Mounting Type: Through Hole
Package / Case: 20-DIP (0.300", 7.62mm)
Series: 74ACT

All identified substitute parts meet these electrical and mechanical requirements. Substitutes are grouped by manufacturer and product status to facilitate selection based on availability and compliance requirements.

Parameter Comparison

Part Number	Manufacturer	Product Status	Logic Type	Elements / Bits	Output Type	Current (mA)	Supply Voltage	Temp Range	Package	RoHS Status
74ACT244PC	onsemi	Obsolete	Buffer, Non-Inverting	2 / 4	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	20-DIP	REACH Unaffected
TC74ACT244PF	Toshiba Semiconductor and Storage	Active	Buffer, Non-Inverting	2 / 4	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	20-DIP	ROHS3 Compliant
SN74ACT244N	Texas Instruments	Active	Buffer, Non-Inverting	2 / 4	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	20-DIP	ROHS3 Compliant
SN74ACT244NE4	Texas Instruments	Active	Buffer, Non-Inverting	2 / 4	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	20-DIP	ROHS3 Compliant
SN74ACT241N	Texas Instruments	Active	Buffer, Non-Inverting	2 / 4	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	20-DIP	ROHS3 Compliant
CD74ACT244E	Harris Corporation	Obsolete	Buffer, Non-Inverting	2 / 4	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	20-DIP	RoHS non-compliant
CD74ACT241E	Harris Corporation	Obsolete	Buffer, Non-Inverting	2 / 4	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	20-DIP	RoHS non-compliant

Engineering Selection Recommendations

For New Designs and Active Production: Select TC74ACT244PF (Toshiba), SN74ACT244N, SN74ACT244NE4, or SN74ACT241N (Texas Instruments). These parts carry Active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment for modern manufacturing environments.

For Legacy System Maintenance: CD74ACT244E and CD74ACT241E (Harris Corporation) provide functional equivalence but carry obsolete status and RoHS non-compliance. These are suitable only for direct replacement in existing systems where regulatory compliance is not a requirement.

Inventory Considerations: All substitute parts are available in stock quantities ranging from 1,020 to 14,209 units, supporting both immediate replacement needs and production volume requirements.

Frequently Asked Questions (FAQ)

Q: Can SN74ACT241N replace 74ACT244PC directly? A: Yes. SN74ACT241N meets all electrical and mechanical parameters: 2-element, 4-bit per element buffer with 3-state output, 24mA output current, 4.5V to 5.5V supply, -40°C to 85°C operating range, and 20-DIP package. The base product number differs (74ACT241 vs. 74ACT244), but functional equivalence is maintained for this buffer architecture.

Q: What is the difference between TC74ACT244PF and SN74ACT244N? A: Both are functionally equivalent with identical electrical specifications and 20-DIP packaging. TC74ACT244PF is manufactured by Toshiba; SN74ACT244N is manufactured by Texas Instruments. Both carry Active product status and ROHS3 compliance. Selection may be based on supplier availability or procurement preference.

Q: Are the Harris Corporation parts (CD74ACT244E, CD74ACT241E) suitable for new designs? A: No. Both Harris parts are classified as obsolete and RoHS non-compliant. They are suitable only for direct replacement in legacy systems where regulatory compliance is not required. For new designs, use active-status alternatives from Toshiba or Texas Instruments.

Q: Does package type affect substitution? A: All substitute parts use the same 20-DIP (0.300", 7.62mm) through-hole package. Direct mechanical substitution is possible without PCB redesign. Verify pin configuration alignment with your specific application schematic.

Q: What is the difference between SN74ACT244N and SN74ACT244NE4? A: Both are manufactured by Texas Instruments with identical electrical specifications, 20-DIP packaging, and Active product status. SN74ACT244NE4 is a variant designation. Functional equivalence is complete; selection depends on supplier stock and part number availability in your procurement system.

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