74AC244PC Equivalent & Substitute Parts

Part Overview

The 74AC244PC is a non-inverting buffer IC manufactured by onsemi, designed for logic signal buffering applications with 2 elements, 4 bits per element, and 3-state output capability. This component operates across a 2V to 6V supply voltage range and is housed in a 20-DIP package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring this functional specification.

Substiute Parts

74AC244PC

onsemiIn Stock: 2025474AC244PC 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

Substitute parts for the 74AC244PC are classified based on functional and electrical equivalence within the 74AC logic family. Substitution eligibility is determined by 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
• Operating Temperature: -40°C ~ 85°C (TA)
• Package / Case: 20-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole

Parts meeting all these parameters are direct functional equivalents. Parts with voltage supply ranges that encompass the 2V to 6V specification are acceptable substitutes. Package and pin configuration must remain identical for board-level compatibility.

Parameter Comparison

Engineering Selection Recommendations

For applications requiring the 74AC244PC, the following selection criteria apply:

SN74AC244N (Texas Instruments) and SN74AC244NE4 (Texas Instruments) are direct functional equivalents with active product status and ROHS3 compliance. Both parts maintain identical electrical specifications and package configuration. SN74AC244N is available in standard tube packaging, while SN74AC244NE4 offers the same specifications with alternative packaging designation.

SN74AC241N (Texas Instruments) is a parametric equivalent with active product status and ROHS3 compliance. This part maintains all critical electrical parameters and package specifications, with the base product number differing from the 74AC244 series.

CD74AC244E (Harris Corporation) is functionally equivalent but operates within a reduced voltage supply range of 1.5V to 5.5V, which encompasses the 2V to 6V specification of the original part. This part is obsolete and RoHS non-compliant, making it suitable only for legacy system maintenance where new component procurement is not feasible.

For new designs and ongoing production, active-status parts with current compliance certifications are preferred. Texas Instruments SN74AC244N and SN74AC244NE4 are recommended as primary substitutes.

Frequently Asked Questions (FAQ)

Q: Can SN74AC244N be used as a direct replacement for 74AC244PC?

A: Yes. SN74AC244N is a direct functional equivalent with identical logic type, element count, bit configuration, output type, current ratings, voltage supply range, operating temperature, and 20-DIP package specification. The part is manufactured by Texas Instruments and maintains active product status with ROHS3 compliance.

Q: What is the difference between SN74AC244N and SN74AC244NE4?

A: Both parts are functionally identical with the same electrical specifications and 20-DIP package. The difference lies in packaging designation and supplier device package classification. Both are active products from Texas Instruments with ROHS3 compliance.

Q: Is CD74AC244E compatible with the 74AC244PC?

A: CD74AC244E is functionally compatible with identical logic specifications and package configuration. However, its voltage supply range is 1.5V to 5.5V, which is narrower than the 74AC244PC specification of 2V to 6V. The part is obsolete and RoHS non-compliant. Use only in legacy system maintenance scenarios.

Q: Why is SN74AC241N listed as a substitute if it has a different base product number?

A: SN74AC241N is classified as a parametric equivalent because it maintains all critical electrical parameters: 2 elements, 4 bits per element, 3-state output, 24mA output current, 2V to 6V supply voltage, -40°C to 85°C operating temperature, and 20-DIP package. The base product number difference does not affect functional compatibility in applications requiring these specifications.

Q: What compliance certifications should I prioritize when selecting a substitute?

A: For new designs and production environments, prioritize parts with active product status and ROHS3 compliance. SN74AC244N and SN74AC244NE4 meet these criteria. Legacy systems may use obsolete parts, but compliance status should be evaluated against application requirements.

Q: Are all substitute parts available in the same packaging format?

A: All substitute parts listed are housed in 20-DIP (0.300", 7.62mm) through-hole packages, maintaining identical board-level compatibility. Packaging designations (Tube) may vary by supplier, but the physical package specification remains constant.