74ACQ244PC Equivalent & Substitute Parts

Part Overview

The 74ACQ244PC is a non-inverting buffer logic integrated circuit manufactured by onsemi, featuring 2 elements with 4 bits per element and 3-state output capability. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring similar functionality.

The 74ACQ244PC operates across a supply voltage range of 2V to 6V with output current ratings of 24mA for both high and low states, housed in a 20-pin DIP package suitable for through-hole mounting applications.

Substiute Parts

74ACQ244PC

onsemiIn Stock: 82274ACQ244PC Datasheet

Current PartRFQ

SN74AC244N

Texas InstrumentsIn Stock: 1307SN74AC244N Datasheet

DirectRFQ

CD74AC244E

Harris CorporationIn Stock: 9113CD74AC244E Datasheet

SimilarRFQ

SN74AC241N

Texas InstrumentsIn Stock: 1839SN74AC241N Datasheet

Parametric EquivalentRFQ

SN74AC244NE4

Texas InstrumentsIn Stock: 1048SN74AC244NE4 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74ACQ244PC is determined by strict alignment of 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: 2V ~ 6V (or compatible range)
• Operating Temperature: -40°C ~ 85°C (TA)
• Package / Case: 20-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole

Substitute parts are categorized as follows:

Direct Manufacturer Equivalent: SN74AC244N matches all critical electrical and mechanical parameters with identical specifications.

Similar Manufacturer Part: CD74AC244E provides equivalent functionality but operates within a reduced supply voltage range of 1.5V ~ 5.5V, requiring verification of system voltage compatibility.

Parametric Equivalents: SN74AC241N and SN74AC244NE4 maintain identical electrical performance and package specifications, with differences in base product numbering and product status.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SN74AC244N (Texas Instruments)

SN74AC244N is the optimal substitute for the 74ACQ244PC. This part maintains identical electrical specifications across all critical parameters including supply voltage range (2V ~ 6V), output current ratings (24mA), operating temperature range (-40°C ~ 85°C), and 20-DIP package configuration. The part carries Active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment for new designs.

Secondary Recommendation: SN74AC244NE4 (Texas Instruments)

SN74AC244NE4 provides equivalent functionality with identical electrical and mechanical specifications. This variant maintains Active product status and ROHS3 compliance. Selection between SN74AC244N and SN74AC244NE4 may be determined by packaging and distribution channel availability.

Alternative: SN74AC241N (Texas Instruments)

SN74AC241N functions as a parametric equivalent with matching electrical performance and package specifications. The base product number differs (74AC241 versus 74AC244), but all critical operating parameters align with the original 74ACQ244PC. This part is Active and ROHS3 compliant.

Not Recommended: CD74AC244E (Harris Corporation)

CD74AC244E exhibits reduced supply voltage range (1.5V ~ 5.5V) compared to the 74ACQ244PC specification (2V ~ 6V). This limitation may restrict operation in systems requiring the full 6V supply capability. Additionally, this part carries Obsolete product status and RoHS non-compliance, limiting suitability for new designs.

Frequently Asked Questions (FAQ)

Q: Can SN74AC244N be used as a direct replacement for 74ACQ244PC in existing designs?

A: Yes. SN74AC244N maintains identical electrical specifications including supply voltage range (2V ~ 6V), output current (24mA), operating temperature (-40°C ~ 85°C), and 20-DIP package configuration. No circuit modifications are required for pin-compatible substitution.

Q: What is the difference between SN74AC244N and SN74AC244NE4?

A: Both parts provide identical electrical and mechanical specifications. The designation suffix (NE4) indicates a specific packaging or distribution variant. Selection depends on availability through your component supplier and packaging requirements (both use 20-DIP through-hole mounting).

Q: Why is CD74AC244E not recommended as a substitute?

A: CD74AC244E operates within a reduced supply voltage range of 1.5V ~ 5.5V, which does not fully cover the 74ACQ244PC specification of 2V ~ 6V. Systems requiring operation at 6V supply voltage cannot use this part. Additionally, CD74AC244E is Obsolete and RoHS non-compliant.

Q: Are all substitute parts available in the same 20-DIP package?

A: Yes. All listed substitute parts (SN74AC244N, SN74AC244NE4, SN74AC241N, and CD74AC244E) are packaged in 20-DIP (0.300", 7.62mm) configuration suitable for through-hole mounting, ensuring mechanical compatibility with existing PCB layouts.

Q: What is the significance of Active versus Obsolete product status?

A: Active parts are in current production with guaranteed long-term availability and supply chain support. Obsolete parts have been discontinued and may face supply constraints or eventual unavailability. For new designs, Active parts (SN74AC244N, SN74AC244NE4, SN74AC241N) are preferred.

Q: Does RoHS compliance affect functional compatibility?

A: RoHS compliance does not affect electrical functionality or pin compatibility. ROHS3-compliant parts (SN74AC244N, SN74AC244NE4, SN74AC241N) meet environmental and regulatory requirements for modern manufacturing and end-of-life disposal, making them suitable for applications subject to RoHS regulations.