54FCT245CTDB Equivalent & Substitute Parts

Part Overview

The 54FCT245CTDB is an octal bus transceiver with non-inverting logic, 3-state output capability, and 8-bit per element configuration manufactured by Renesas Electronics Corporation. This component operates across a 4.5V to 5.5V supply voltage range and supports operating temperatures from -55°C to 125°C in a 20-CDIP through-hole package.

The 54FCT245CTDB is classified as obsolete. Equivalent and substitute parts are necessary to maintain system functionality in legacy applications, ensure design continuity, and provide access to active inventory from alternative manufacturers.

Key Parameters

Parameter	Specification
Logic Type	Transceiver, Non-Inverting
Number of Elements	1
Number of Bits per Element	8
Output Type	3-State
Current - Output High, Low	12mA, 48mA
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-55°C ~ 125°C (TA)
Mounting Type	Through Hole
Package / Case	20-CDIP (0.300", 7.62mm)

Substitute Part Grouping Explanation

Substitution for the 54FCT245CTDB is determined by strict equivalence across the following critical parameters:

Logic Type: Transceiver, Non-Inverting
Number of Elements: 1
Number of Bits per Element: 8
Output Type: 3-State
Current - Output High, Low: 12mA, 48mA
Voltage - Supply: 4.5V ~ 5.5V
Operating Temperature: -55°C ~ 125°C (TA)
Mounting Type: Through Hole
Package / Case: 20-CDIP (0.300", 7.62mm)

Substitute parts are grouped into two categories:

Full Parametric Equivalents: Parts matching all electrical and mechanical parameters, including output current specifications of 12mA high and 48mA low.

Functional Equivalents with Reduced Output Current: Parts meeting all parameters except output current (SNJ54BCT245J operates at 3mA/24mA and 15mA/64mA), suitable only where lower drive capability is acceptable.

Parameter Comparison

Part Number	Manufacturer	Series	Logic Type	Elements	Bits/Element	Output Type	Current High/Low (mA)	Supply Voltage	Temp Range (°C)	Package	Product Status	RoHS Status
54FCT245CTDB	Renesas Electronics	54FCT	Transceiver, Non-Inverting	1	8	3-State	12, 48	4.5–5.5	-55 to 125	20-CDIP	Obsolete	Non-compliant
8551101RA	Texas Instruments	54F	Transceiver, Non-Inverting	1	8	3-State	12, 48	4.5–5.5	-55 to 125	20-CDIP	Active	ROHS3 Compliant
CY54FCT245ATDMB	Texas Instruments	54FCT	Transceiver, Non-Inverting	1	8	3-State	12, 48	4.5–5.5	-55 to 125	20-CDIP	Active	ROHS3 Compliant
JM38510/34803BRA	Texas Instruments	54F	Transceiver, Non-Inverting	1	8	3-State	12, 48	4.5–5.5	-55 to 125	20-CDIP	Active	ROHS3 Compliant
M38510/34803BRA	Texas Instruments	54F	Transceiver, Non-Inverting	1	8	3-State	12, 48	4.5–5.5	-55 to 125	20-CDIP	Active	ROHS3 Compliant
SN54F245J	Texas Instruments	54F	Transceiver, Non-Inverting	1	8	3-State	12, 48	4.5–5.5	-55 to 125	20-CDIP	Active	ROHS3 Compliant
SNJ54AS645J	Texas Instruments	54AS	Transceiver, Non-Inverting	1	8	3-State	12, 48	4.5–5.5	-55 to 125	20-CDIP	Active	ROHS3 Compliant
SNJ54BCT623J	Texas Instruments	54BCT	Transceiver, Non-Inverting	1	8	3-State	12, 48	4.5–5.5	-55 to 125	20-CDIP	Active	ROHS3 Compliant
SNJ54F245J	Texas Instruments	54F	Transceiver, Non-Inverting	1	8	3-State	12, 48	4.5–5.5	-55 to 125	20-CDIP	Active	ROHS3 Compliant
SNJ54BCT245J	Texas Instruments	54BCT	Transceiver, Non-Inverting	1	8	3-State	3/24, 15/64	4.5–5.5	-55 to 125	20-CDIP	Active	Not specified

Engineering Selection Recommendations

Primary Substitutes (Full Parametric Match):

CY54FCT245ATDMB, 8551101RA, JM38510/34803BRA, M38510/34803BRA, SN54F245J, SNJ54AS645J, SNJ54BCT623J, and SNJ54F245J are direct parametric equivalents. All are manufactured by Texas Instruments, carry active product status, and meet ROHS3 compliance. These parts are suitable for direct replacement in applications requiring the full 12mA/48mA output current specification.

Secondary Substitute (Reduced Output Current):

SNJ54BCT245J meets all electrical and mechanical parameters except output current, which operates at 3mA/24mA and 15mA/64mA. This part is suitable only for applications where reduced output drive capability does not compromise system performance.

Compliance Consideration:

The original 54FCT245CTDB is RoHS non-compliant. All Texas Instruments substitutes listed above are ROHS3 compliant, supporting modern manufacturing and environmental standards.

Frequently Asked Questions (FAQ)

Q: Can I use SNJ54BCT245J as a direct replacement for 54FCT245CTDB?

A: SNJ54BCT245J is functionally compatible but operates at reduced output current levels (3mA/24mA and 15mA/64mA versus 12mA/48mA). Use this part only if your circuit design does not require the full output current specification of the original component.

Q: Are all substitute parts available in the same 20-CDIP package?

A: Yes. All listed substitute parts use the 20-CDIP (0.300", 7.62mm) through-hole package, ensuring mechanical compatibility with existing PCB layouts.

Q: What is the difference between the 54F and 54FCT series substitutes?

A: Both series meet the electrical and mechanical parameters of the 54FCT245CTDB. The 54F series (8551101RA, JM38510/34803BRA, M38510/34803BRA, SN54F245J, SNJ54F245J) and 54FCT series (CY54FCT245ATDMB) are equivalent for this application. Series designation reflects manufacturing lineage but does not affect functional compatibility.

Q: Are the Texas Instruments substitutes pin-compatible with the Renesas original?

A: Yes. All substitute parts maintain the same 20-CDIP pinout, supply voltage range (4.5V–5.5V), operating temperature range (-55°C to 125°C), and 3-state output configuration, ensuring direct PCB compatibility.

Q: Which substitute offers the best compliance profile?

A: All Texas Instruments substitutes are ROHS3 compliant and carry active product status, providing superior compliance and long-term availability compared to the obsolete Renesas original.

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