SN74ACT244NS Equivalent & Substitute Parts

Part Overview

The SN74ACT244NS is a non-inverting buffer logic integrated circuit manufactured by Texas Instruments, designed for 2-element, 4-bit per element configurations with 3-state output capability. This component operates within the 74ACT logic series and is housed in a 20-SOIC surface mount package.

The SN74ACT244NS is currently discontinued at DiGi Electronics. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this buffer configuration.

Substiute Parts

SN74ACT244NS

Texas InstrumentsIn Stock: 898SN74ACT244NS Datasheet

Current PartRFQ

SN74ACT244NSR

Texas InstrumentsIn Stock: 2425SN74ACT244NSR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74ACT244NS is determined by strict equivalence across the following critical parameters:

Functional Parameters:

• Logic type: Buffer, Non-Inverting
• Element configuration: 2 elements, 4 bits per element
• Output architecture: 3-State

Electrical Parameters:

• Output current capability: 24mA (high), 24mA (low)
• Supply voltage range: 4.5V ~ 5.5V
• Operating temperature: -40°C ~ 85°C

Physical Parameters:

• Package type: 20-SOIC with 0.209" width (5.30mm)
• Mounting: Surface mount

Compliance Parameters:

• RoHS3 compliance
• MSL rating: 1 (Unlimited)

The substitute part SN74ACT244NSR maintains identical functional, electrical, and physical specifications while differing only in packaging format (Cut Tape and Digi-Reel) and product status (Active vs. Discontinued).

Parameter Comparison

Engineering Selection Recommendations

The SN74ACT244NSR is a direct functional equivalent to the SN74ACT244NS. Both components are manufactured by Texas Instruments and share identical electrical, functional, and physical specifications within the 74ACT logic series.

Selection Basis:

The SN74ACT244NSR is recommended as the primary substitute due to:

• Active product status, ensuring ongoing availability and supply chain continuity
• ROHS3 compliance matching the original part
• Identical 20-SOIC package footprint and surface mount configuration
• Equivalent electrical performance across all specified parameters
• MSL 1 rating providing unlimited shelf life

The difference in packaging format (Cut Tape and Digi-Reel versus standard packaging) does not affect functional compatibility or circuit performance. This difference relates solely to order quantity and delivery format.

Frequently Asked Questions (FAQ)

Q: Can the SN74ACT244NSR be used as a direct replacement for the SN74ACT244NS in existing designs?

A: Yes. The SN74ACT244NSR is functionally and electrically identical to the SN74ACT244NS. Both components feature the same 20-SOIC package, identical pin configuration, and equivalent electrical specifications. No circuit modifications are required.

Q: What is the difference between the SN74ACT244NS and SN74ACT244NSR?

A: The primary differences are product status and packaging format. The SN74ACT244NS is discontinued, while the SN74ACT244NSR is active. The SN74ACT244NSR is supplied in Cut Tape and Digi-Reel formats. All functional and electrical parameters are identical.

Q: Are there any compatibility concerns with the 20-SOIC package?

A: No. Both parts use the identical 20-SOIC (0.209", 5.30mm Width) package. PCB footprints, solder pad layouts, and mounting procedures are identical. No design changes are necessary.

Q: Does the SN74ACT244NSR meet the same compliance requirements?

A: Yes. The SN74ACT244NSR is ROHS3 compliant and carries an MSL rating of 1 (Unlimited), matching the original SN74ACT244NS specifications.

Q: What output current capability does the SN74ACT244NSR provide?

A: The SN74ACT244NSR provides 24mA output current for both high and low states, identical to the SN74ACT244NS.

Q: Is the operating temperature range the same?

A: Yes. Both components operate across the identical temperature range of -40°C to 85°C (TA).