74ACTQ244PC Equivalent & Substitute Parts

Part Overview

The 74ACTQ244PC is a non-inverting buffer logic IC manufactured by onsemi, featuring 2 elements with 4 bits per element and 3-state output capability. This device operates within the 4.5V to 5.5V supply voltage range and is rated for -40°C to 85°C operating temperature. The 74ACTQ244PC is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	74ACTQ244PC
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	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)
Supplier Device Package	20-PDIP
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the 74ACTQ244PC are qualified based on the following critical parameters that determine functional and mechanical compatibility:

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)

All substitute parts listed below match these parameters exactly. Substitutes are grouped by manufacturer and product status to facilitate procurement decisions.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements	Bits/Element	Output Type	Current (mA)	Supply Voltage	Temp Range	Package	Status
74ACTQ244PC	onsemi	Buffer, Non-Inverting	2	4	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	20-DIP	Obsolete
TC74ACT244PF	Toshiba Semiconductor and Storage	Buffer, Non-Inverting	2	4	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	20-DIP	Active
CD74ACT241E	Harris Corporation	Buffer, Non-Inverting	2	4	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	20-DIP	Obsolete
CD74ACT244E	Harris Corporation	Buffer, Non-Inverting	2	4	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	20-DIP	Obsolete
SN74ACT241N	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	20-DIP	Active
SN74ACT244N	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	20-DIP	Active
SN74ACT244NE4	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	20-DIP	Active

Engineering Selection Recommendations

For new designs and procurement, active product status parts are preferred for long-term availability and supply chain stability. The following parts are currently in active production:

TC74ACT244PF (Toshiba Semiconductor and Storage) - Active status with ROHS3 compliance
SN74ACT241N (Texas Instruments) - Active status with ROHS3 compliance
SN74ACT244N (Texas Instruments) - Active status with ROHS3 compliance
SN74ACT244NE4 (Texas Instruments) - Active status with ROHS3 compliance

For legacy system maintenance where the original 74ACTQ244PC is no longer available, the obsolete equivalents CD74ACT241E and CD74ACT244E from Harris Corporation remain functionally compatible but should be sourced only when active alternatives are unavailable.

All substitute parts maintain identical electrical performance characteristics, supply voltage ranges, output current ratings, and operating temperature specifications. Package compatibility is maintained across all listed substitutes in the 20-DIP form factor.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 74ACTQ244PC with any of the listed substitute parts?

A: Yes. All listed substitute parts are parametrically equivalent, matching the 74ACTQ244PC in logic type, element count, bit configuration, output type, current ratings, supply voltage, operating temperature, and 20-DIP package specification. Direct pin-for-pin replacement is supported.

Q: What is the difference between 74ACT241 and 74ACT244 variants?

A: Both variants maintain identical electrical specifications for this application. The base product numbers differ (74ACT241 vs. 74ACT244), but both are qualified as functional equivalents with matching 2-element, 4-bit-per-element, 3-state buffer configurations.

Q: Are there RoHS compliance differences between substitutes?

A: Yes. Active production parts (TC74ACT244PF, SN74ACT241N, SN74ACT244N, SN74ACT244NE4) are ROHS3 compliant. Obsolete parts (CD74ACT241E, CD74ACT244E) are RoHS non-compliant. For new designs, ROHS3 compliant parts are required in most jurisdictions.

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

A: Texas Instruments SN74ACT244N and SN74ACT244NE4 are recommended for new designs due to active product status, ROHS3 compliance, and established supply chain presence. Toshiba TC74ACT244PF is also actively produced and represents an alternative source.

Q: Is the 20-DIP package consistent across all substitutes?

A: Yes. All substitute parts use the 20-DIP (0.300", 7.62mm) through-hole package, ensuring mechanical compatibility with existing PCB layouts and socket configurations.

Q: Can I mix different substitute manufacturers in the same design?

A: Yes. All substitutes are parametrically equivalent and maintain identical electrical performance. Multiple manufacturers can be used interchangeably within the same circuit without functional impact.

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