54FCT244ATDB Equivalent & Substitute Parts

Part Overview

The 54FCT244ATDB is a non-inverting buffer logic integrated circuit manufactured by Renesas Electronics Corporation. This device features 2 elements with 4 bits per element and 3-state output capability, housed in a 20-CDIP package. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring this functional specification.

Key Parameters

Parameter	Specification
Manufacturer Part Number	54FCT244ATDB
Manufacturer	Renesas Electronics Corporation
Logic Type	Buffer, Non-Inverting
Number of Elements	2
Number of Bits per Element	4
Output Type	3-State
Current - Output High, Low	12mA, 48mA
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-55°C ~ 125°C (TA)
Package / Case	20-CDIP (0.300", 7.62mm)
Mounting Type	Through Hole
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the 54FCT244ATDB are selected based on strict parametric equivalence. The following criteria determine substitutability:

Logic Type: Buffer, Non-Inverting
Number of Elements: 2
Number of Bits per Element: 4
Output Type: 3-State
Current Ratings: 12mA (High), 48mA (Low)
Supply Voltage Range: 4.5V ~ 5.5V
Operating Temperature Range: -55°C ~ 125°C
Package / Case: 20-CDIP (0.300", 7.62mm)
Mounting Type: Through Hole

All identified substitutes meet these electrical and mechanical parameters. Variations in product status, RoHS compliance, and manufacturer do not affect functional interchangeability within the specified parameter set.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements / Bits	Output Type	Current (H/L)	Supply Voltage	Temp Range	Package	Product Status	RoHS Status
54FCT244ATDB	Renesas	Buffer, Non-Inverting	2 / 4	3-State	12mA, 48mA	4.5V ~ 5.5V	-55°C ~ 125°C	20-CDIP	Obsolete	Non-compliant
54FCT244TDB	Renesas	Buffer, Non-Inverting	2 / 4	3-State	12mA, 48mA	4.5V ~ 5.5V	-55°C ~ 125°C	20-CDIP	Obsolete	Non-compliant
SN54F241J	Texas Instruments	Buffer, Non-Inverting	2 / 4	3-State	12mA, 48mA	4.5V ~ 5.5V	-55°C ~ 125°C	20-CDIP	Active	ROHS3 Compliant
SN54F244J	Texas Instruments	Buffer, Non-Inverting	2 / 4	3-State	12mA, 48mA	4.5V ~ 5.5V	-55°C ~ 125°C	20-CDIP	Active	ROHS3 Compliant
SNJ54BCT244J	Texas Instruments	Buffer, Non-Inverting	2 / 4	3-State	12mA, 48mA	4.5V ~ 5.5V	-55°C ~ 125°C	20-CDIP	Active	ROHS3 Compliant

Engineering Selection Recommendations

For applications currently using the 54FCT244ATDB, the following selection criteria apply:

Renesas Equivalent (54FCT244TDB): Direct parametric equivalent from the same manufacturer. Maintains identical electrical specifications and package configuration. Retains obsolete product status and non-compliant RoHS classification. Suitable for legacy system maintenance where manufacturer continuity is required.

Texas Instruments Alternatives (SN54F241J, SN54F244J, SNJ54BCT244J): All three Texas Instruments parts provide full parametric equivalence with active product status and ROHS3 compliance. These parts are recommended for new designs and systems requiring current product availability and regulatory compliance. The SNJ54BCT244J variant represents the BCT logic family, while SN54F241J and SN54F244J represent the 54F series.

Product status and compliance certifications do not alter functional interchangeability. Selection should be based on supply chain availability, compliance requirements, and design timeline considerations.

Frequently Asked Questions (FAQ)

Q: Can the 54FCT244ATDB be directly replaced with any of the listed substitutes?

A: Yes. All listed substitutes meet the identical electrical and mechanical parameters: 2-element, 4-bit non-inverting buffer with 3-state output, 12mA/48mA current ratings, 4.5V–5.5V supply voltage, -55°C to 125°C operating temperature, and 20-CDIP through-hole package. Direct pin-for-pin substitution is supported.

Q: What is the difference between 54FCT244ATDB and 54FCT244TDB?

A: Both are Renesas products with identical electrical specifications and 20-CDIP packaging. The primary difference is packaging format: 54FCT244ATDB uses standard packaging while 54FCT244TDB is supplied in tube packaging. Both are obsolete products.

Q: Are the Texas Instruments parts (SN54F241J, SN54F244J, SNJ54BCT244J) suitable for new designs?

A: Yes. All three Texas Instruments substitutes carry active product status and ROHS3 compliance, making them appropriate for new designs. They maintain full parametric equivalence with the original 54FCT244ATDB specification.

Q: What is the difference between SN54F244J and SNJ54BCT244J?

A: Both parts are functionally equivalent with identical electrical parameters and 20-CDIP packaging. SN54F244J belongs to the 54F logic family, while SNJ54BCT244J belongs to the 54BCT logic family. Selection between these variants should be based on supply availability and design preference.

Q: Does RoHS compliance affect functional interchangeability?

A: No. RoHS compliance status does not alter electrical or mechanical functionality. The choice between RoHS-compliant (Texas Instruments) and non-compliant (Renesas) parts should be based on regulatory requirements for the end application.

Q: Can these parts be used in military or aerospace applications?

A: The 54-series designation indicates military-grade temperature range (-55°C to 125°C). Suitability for specific military or aerospace applications depends on additional qualification requirements beyond parametric equivalence. Consult application-specific standards and procurement specifications.

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