54FCT244TDB Equivalent & Substitute Parts

Part Overview

The 54FCT244TDB is a non-inverting buffer logic IC manufactured by Renesas Electronics Corporation, designed for 2 element, 4-bit per element configurations with 3-state output capability. This component operates across a 4.5V to 5.5V supply range and is packaged in a 20-CDIP through-hole format. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance, legacy equipment repair, and design continuity.

Substiute Parts

54FCT244TDB

Renesas Electronics CorporationIn Stock: 174354FCT244TDB Datasheet

Current PartRFQ

74FCT244ATQG

IDT, Integrated Device Technology IncIn Stock: 240074FCT244ATQG Datasheet

MFR RecommendedRFQ

SN54F241J

Texas InstrumentsIn Stock: 2243SN54F241J Datasheet

Parametric EquivalentRFQ

SN54F244J

Texas InstrumentsIn Stock: 1375SN54F244J Datasheet

Parametric EquivalentRFQ

SNJ54BCT244J

Texas InstrumentsIn Stock: 1244SNJ54BCT244J Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 54FCT244TDB is determined by the following critical parameters:

Primary Compatibility Criteria:

• Logic type: Buffer, Non-Inverting
• Number of elements: 2
• Number of bits per element: 4
• Output type: 3-State
• Output current capability: 12mA (high), 48mA (low)
• Supply voltage range: 4.5V ~ 5.5V
• Operating temperature range: -55°C ~ 125°C
• Package type: 20-CDIP through-hole configuration

Substitute parts are classified into two categories:

MFR Recommended Substitute: Parts recommended by the original manufacturer or authorized distributors as direct functional replacements, though packaging may differ.

Parametric Equivalents: Parts that match all critical electrical and functional parameters but may have different product status, compliance certifications, or packaging formats.

Parameter Comparison

Engineering Selection Recommendations

For Direct Pin-Compatible Replacement (Through-Hole 20-CDIP):

SN54F244J, SN54F241J, and SNJ54BCT244J are all through-hole 20-CDIP packages with identical electrical parameters to the 54FCT244TDB. These parts maintain the same supply voltage range (4.5V ~ 5.5V), operating temperature range (-55°C ~ 125°C), and output current specifications (12mA, 48mA). All three are manufactured by Texas Instruments and carry active product status with ROHS3 compliance, providing long-term availability and regulatory alignment.

For Surface-Mount Applications:

The 74FCT244ATQG offers functional equivalence with a surface-mount 20-SSOP package. This part is manufactured by IDT and maintains the same logic configuration and 3-state output capability. Note that the supply voltage range is narrower (4.75V ~ 5.25V) and the operating temperature range is reduced (-40°C ~ 85°C). Output current specifications are higher (15mA, 64mA), which may be advantageous in certain drive applications but requires circuit validation.

Compliance Considerations:

The 54FCT244TDB is RoHS non-compliant. If regulatory compliance is required, SN54F244J, SN54F241J, and SNJ54BCT244J all meet ROHS3 standards and are recommended for new designs or systems requiring environmental compliance documentation.

Frequently Asked Questions (FAQ)

Q: Can the 74FCT244ATQG be used as a direct replacement for the 54FCT244TDB?

A: The 74FCT244ATQG is functionally equivalent in logic configuration but differs in three critical aspects: package format (20-SSOP surface-mount vs. 20-CDIP through-hole), supply voltage range (4.75V ~ 5.25V vs. 4.5V ~ 5.5V), and operating temperature range (-40°C ~ 85°C vs. -55°C ~ 125°C). Direct PCB substitution is not possible without redesign. Use only if your application operates within the narrower voltage and temperature specifications and if surface-mount assembly is feasible.

Q: What is the difference between SN54F244J, SN54F241J, and SNJ54BCT244J?

A: All three parts are manufactured by Texas Instruments and share identical electrical parameters, supply voltage range, operating temperature range, and 20-CDIP through-hole packaging. They differ only in their internal logic family designation (54F, 54F, and 54BCT respectively). All are parametric equivalents suitable for direct pin-compatible replacement of the 54FCT244TDB.

Q: Are the Texas Instruments substitutes pin-compatible with the 54FCT244TDB?

A: Yes. SN54F244J, SN54F241J, and SNJ54BCT244J all use the 20-CDIP package with identical pinout and electrical specifications. They are direct pin-compatible replacements requiring no circuit modification.

Q: Why does the 74FCT244ATQG have higher output current specifications?

A: The 74FCT244ATQG specifies 15mA (high) and 64mA (low) output current compared to the 54FCT244TDB's 12mA and 48mA. Higher output current capability indicates greater drive strength. This is not a limitation but rather an enhancement that may benefit applications requiring higher fanout or lower output impedance. Circuit validation is recommended to ensure compatibility with existing load conditions.

Q: Which substitute part should I select for a legacy equipment repair?

A: For direct replacement without PCB modification, select SN54F244J, SN54F241J, or SNJ54BCT244J. All three are through-hole 20-CDIP packages with active product status and long-term availability from Texas Instruments. If RoHS compliance documentation is required, all three meet ROHS3 standards.

Q: Is the 54FCT244TDB still available for purchase?

A: The 54FCT244TDB is classified as obsolete. Current inventory availability is limited to existing stock. For new applications or long-term supply assurance, transition to one of the active substitute parts listed in this document.