SN74BCT244DBR Equivalent & Substitute Parts

Part Overview

The SN74BCT244DBR is a Buffer, Non-Inverting logic IC manufactured by Texas Instruments, featuring 2 elements with 4 bits per element and 3-state output capability in a 20-SSOP surface mount package. The device operates at 4.5V to 5.5V supply voltage with an operating temperature range of 0°C to 70°C. Currently classified as obsolete, alternative parts are necessary to ensure design continuity and long-term component availability for new production runs and system upgrades.

Substiute Parts

SN74BCT244DBR

Texas InstrumentsIn Stock: 3506SN74BCT244DBR Datasheet

Current PartRFQ

SN74ABT244ADBR

Texas InstrumentsIn Stock: 4294SN74ABT244ADBR Datasheet

MFR RecommendedRFQ

SN74F244DBR

Texas InstrumentsIn Stock: 2793SN74F244DBR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SN74BCT244DBR is determined by strict equivalence in the following core parameters: logic type (Buffer, Non-Inverting), number of elements (2), bits per element (4), output type (3-State), package type (20-SSOP), and supply voltage range (4.5V ~ 5.5V). Two substitute parts meet these criteria:

SN74ABT244ADBR is classified as a manufacturer-recommended substitute. It maintains identical functional specifications and package configuration while offering enhanced performance characteristics and active product status.

SN74F244DBR is classified as a parametric equivalent. It matches the original part's electrical output specifications and operating temperature range while providing active product availability.

Both substitutes are manufactured by Texas Instruments, maintain ROHS3 compliance, and are available in the same 20-SSOP surface mount package.

Parameter Comparison

Engineering Selection Recommendations

SN74ABT244ADBR is the primary substitute choice. This part is active in production status, ensuring long-term availability and supply chain stability. It provides enhanced output current capability (32mA high vs. 15mA on the original) and an extended operating temperature range (-40°C to 85°C), making it suitable for applications requiring broader environmental performance. ROHS3 compliance is maintained.

SN74F244DBR serves as an alternative parametric equivalent. This part maintains the original electrical output specifications (15mA, 64mA) and operating temperature range (0°C to 70°C), providing a direct functional match. Active product status ensures availability. ROHS3 compliance is maintained.

Both substitutes are pin-compatible and functionally equivalent within their specified operating parameters. Selection between them depends on application requirements for output current capability and operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT244ADBR directly replace SN74BCT244DBR in existing designs?

A: Yes. Both parts share identical logic function, pin configuration, package type (20-SSOP), and supply voltage range (4.5V ~ 5.5V). The SN74ABT244ADBR offers higher output current capability and extended temperature range, making it a compatible upgrade.

Q: What is the difference between SN74ABT244ADBR and SN74F244DBR?

A: The primary difference is output current capability. SN74ABT244ADBR provides 32mA high output current and operates from -40°C to 85°C. SN74F244DBR provides 15mA high output current and operates from 0°C to 70°C, matching the original part's electrical specifications.

Q: Are all three parts available in the same package?

A: Yes. All three parts are manufactured in the 20-SSOP surface mount package with identical physical dimensions (0.209", 5.30mm width).

Q: Do the substitute parts maintain RoHS compliance?

A: Yes. Both SN74ABT244ADBR and SN74F244DBR are ROHS3 compliant, matching the compliance status of the original SN74BCT244DBR.

Q: Why is the original SN74BCT244DBR classified as obsolete?

A: The SN74BCT244DBR has been discontinued by Texas Instruments. The substitute parts listed provide equivalent or enhanced functionality with active production status.

Q: Can I use SN74F244DBR if my application requires the extended temperature range?

A: No. SN74F244DBR operates from 0°C to 70°C, identical to the original part. For applications requiring extended temperature operation, SN74ABT244ADBR (-40°C to 85°C) is the appropriate choice.