CD74ACT244E-NG Equivalent & Substitute Parts

Part Overview

The CD74ACT244E-NG is a non-inverting buffer logic integrated circuit manufactured by Texas Instruments, configured as 2 elements with 4 bits per element and 3-state output capability. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement continuity. The 74ACT series logic buffers are widely used in digital systems requiring signal buffering and bus driving applications with 3-state output control.

Substiute Parts

CD74ACT244E-NG

Texas InstrumentsIn Stock: 1005CD74ACT244E-NG Datasheet

Current PartRFQ

SN74ACT244RKSR

Texas InstrumentsIn Stock: 1016SN74ACT244RKSR Datasheet

MFR RecommendedRFQ

CD74ACT241E

Harris CorporationIn Stock: 14264CD74ACT241E Datasheet

Parametric EquivalentRFQ

CD74ACT244E

Harris CorporationIn Stock: 6351CD74ACT244E Datasheet

Parametric EquivalentRFQ

MC74ACT241N

MotorolaIn Stock: 6271MC74ACT241N Datasheet

Parametric EquivalentRFQ

SN74ACT241N

Texas InstrumentsIn Stock: 1895SN74ACT241N Datasheet

Parametric EquivalentRFQ

SN74ACT244N

Texas InstrumentsIn Stock: 3129SN74ACT244N Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD74ACT244E-NG are identified based on strict parametric equivalence. The following criteria determine substitutability:

Primary Equivalence 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)

Substitution Categories:

1. MFR Recommended Substitute (Package Variant): SN74ACT244RKSR differs only in mounting type (Surface Mount) and package format (20-VQFN), while maintaining identical electrical parameters. This substitution applies when surface mount technology is acceptable in the design.

2. Parametric Equivalents (Through Hole, Same Package): SN74ACT244N, SN74ACT241N, CD74ACT241E, and MC74ACT241N all maintain identical electrical specifications and 20-PDIP through-hole packaging. These parts differ in manufacturer, product status, and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

For Direct Through-Hole Package Replacement (20-DIP):

SN74ACT244N and SN74ACT241N are the primary recommended substitutes. Both are manufactured by Texas Instruments with active product status and ROHS3 compliance certification. SN74ACT244N maintains the identical base product number (74ACT244) as the original part, while SN74ACT241N uses the 74ACT241 base product number but maintains all electrical and mechanical equivalence parameters. Both parts are available in tube packaging and support the same operating conditions.

For Surface Mount Technology Applications:

SN74ACT244RKSR provides parametric equivalence with surface mount configuration (20-VQFN package). This substitution applies when PCB design accommodates surface mount components and the 20-VQFN form factor is acceptable.

For Legacy System Compatibility:

CD74ACT241E (Harris Corporation) and MC74ACT241N (Motorola) maintain full parametric equivalence in 20-DIP through-hole packaging. However, these parts carry RoHS non-compliant status and should be selected only when legacy system requirements or specific design constraints mandate their use.

Compliance Considerations:

Parts with ROHS3 compliance (SN74ACT244N, SN74ACT241N) are preferred for new designs and applications subject to environmental regulations. Parts with RoHS non-compliant status (CD74ACT241E, MC74ACT241N) require justification in regulated environments.

Frequently Asked Questions (FAQ)

Q: Can SN74ACT241N be used as a direct replacement for CD74ACT244E-NG?

A: Yes. SN74ACT241N is a parametric equivalent with identical electrical specifications (2 elements, 4 bits per element, 3-state output, 24mA output current, 4.5V-5.5V supply, -40°C to 85°C operating range) and matching 20-DIP through-hole package. The difference in base product number (74ACT241 vs. 74ACT244) does not affect functional equivalence for buffering applications.

Q: What is the difference between SN74ACT244N and SN74ACT244RKSR?

A: Both parts share identical electrical parameters and the same base product number (74ACT244). The primary difference is packaging: SN74ACT244N uses 20-DIP through-hole format in tube packaging, while SN74ACT244RKSR uses 20-VQFN surface mount format in tape and reel packaging. Selection depends on PCB assembly technology and design requirements.

Q: Are the Harris Corporation CD74ACT241E and Motorola MC74ACT241N suitable for new designs?

A: Both parts maintain full parametric equivalence but carry RoHS non-compliant status. They are suitable for replacement in existing systems or legacy applications. For new designs subject to environmental compliance requirements, Texas Instruments parts with ROHS3 certification (SN74ACT244N or SN74ACT241N) are recommended.

Q: Does the 20-DIP package dimension (0.300", 7.62mm) apply to all through-hole substitutes?

A: Yes. All through-hole substitute parts (SN74ACT244N, SN74ACT241N, CD74ACT241E, MC74ACT241N) use the 20-DIP package with identical 0.300" (7.62mm) body width, enabling direct PCB footprint compatibility.

Q: What inventory availability should be considered for part selection?

A: Current inventory levels are: CD74ACT244E-NG (917 pcs), SN74ACT244RKSR (957 pcs), SN74ACT244N (3100 pcs), SN74ACT241N (1804 pcs), CD74ACT241E (14209 pcs), and MC74ACT241N (6229 pcs). Availability should be evaluated against project procurement timelines and supply chain requirements.