74FCT245CTSOG8 Equivalent & Substitute Parts

Part Overview

The 74FCT245CTSOG8 is a non-inverting transceiver logic IC manufactured by Renesas Electronics Corporation, designed for 8-bit bidirectional data transfer with 3-state output capability. This device operates within a 4.75V to 5.25V supply voltage range and is housed in a 20-SOIC surface mount package. The part is currently in Last Time Buy status, indicating end-of-life production. Equivalent and substitute parts are necessary to ensure design continuity and maintain supply chain reliability for applications requiring this functional specification.

Key Parameters

Parameter	Value
Manufacturer Part Number	74FCT245CTSOG8
Manufacturer	Renesas Electronics Corporation
Logic Type	Transceiver, Non-Inverting
Number of Elements	1
Number of Bits per Element	8
Output Type	3-State
Current - Output High / Low	15mA / 64mA
Voltage - Supply	4.75V ~ 5.25V
Operating Temperature	-40°C ~ 85°C
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 74FCT245CTSOG8 is determined by the following critical parameters:

Logic type: Transceiver, Non-Inverting
Package: 20-SOIC surface mount
Supply voltage range: 4.75V ~ 5.25V
Output configuration: 3-State
Bit width: 8 bits per element
Operating temperature range: -40°C ~ 85°C (primary requirement)

Substitute parts are grouped into two categories based on output current specifications:

Category A (Matched Output Current): Parts with 15mA high output and 64mA low output current, maintaining identical electrical drive characteristics to the original 74FCT245CTSOG8.

Category B (Enhanced Output Current): Parts with 32mA high output and 64mA low output current, providing increased drive capability while maintaining functional compatibility within the same logic family and package footprint.

All substitute parts maintain the same 20-SOIC package, supply voltage range, and 3-state output architecture. Packaging format variations (Tape & Reel, Tube, Bulk, Cut Tape) do not affect electrical compatibility.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Output Current (High/Low)	Supply Voltage	Operating Temperature	Package	Product Status
74FCT245CTSOG8	Renesas Electronics	Transceiver, Non-Inverting	15mA / 64mA	4.75V ~ 5.25V	-40°C ~ 85°C	20-SOIC	Last Time Buy
CD74FCT245M96	Texas Instruments	Transceiver, Non-Inverting	15mA / 64mA	4.75V ~ 5.25V	0°C ~ 70°C	20-SOIC	Active
CY74FCT2245ATSOC	Texas Instruments	Transceiver, Non-Inverting	15mA / 12mA	4.75V ~ 5.25V	-40°C ~ 85°C	20-SOIC	Active
CY74FCT2245ATSOCT	Texas Instruments	Transceiver, Non-Inverting	15mA / 12mA	4.75V ~ 5.25V	-40°C ~ 85°C	20-SOIC	Active
CY74FCT2245CTSOCT	Texas Instruments	Transceiver, Non-Inverting	15mA / 12mA	4.75V ~ 5.25V	-40°C ~ 85°C	20-SOIC	Active
CY74FCT2245TSOC	Texas Instruments	Transceiver, Non-Inverting	15mA / 12mA	4.75V ~ 5.25V	-40°C ~ 85°C	20-SOIC	Active
CY74FCT2245TSOCT	Cypress Semiconductor	Transceiver, Non-Inverting	15mA / 12mA	4.75V ~ 5.25V	-40°C ~ 85°C	20-SOIC	Active
CY74FCT245ATSOC	Texas Instruments	Transceiver, Non-Inverting	32mA / 64mA	4.75V ~ 5.25V	-40°C ~ 85°C	20-SOIC	Active
CY74FCT245ATSOCT	Texas Instruments	Transceiver, Non-Inverting	32mA / 64mA	4.75V ~ 5.25V	-40°C ~ 85°C	20-SOIC	Active
CY74FCT245CTSOC	Texas Instruments	Transceiver, Non-Inverting	32mA / 64mA	4.75V ~ 5.25V	-40°C ~ 85°C	20-SOIC	Active
CY74FCT245TSOC	Cypress Semiconductor	Transceiver, Non-Inverting	32mA / 64mA	4.75V ~ 5.25V	-40°C ~ 85°C	20-SOIC	Active

Engineering Selection Recommendations

Primary Substitutes (Matched Specifications):

CD74FCT245M96 from Texas Instruments provides the closest electrical match with identical output current ratings (15mA / 64mA). This part maintains active product status and ROHS3 compliance. The operating temperature range is narrower (0°C ~ 70°C versus -40°C ~ 85°C), which may limit suitability for extended temperature applications.

Extended Temperature Substitutes:

CY74FCT245ATSOC, CY74FCT245ATSOCT, and CY74FCT245CTSOC from Texas Instruments maintain the full -40°C ~ 85°C operating range with enhanced output current capability (32mA high / 64mA low). These parts are suitable for applications requiring higher drive current or extended temperature operation.

Alternative Sourcing (CY74FCT2245 Series):

CY74FCT2245ATSOC, CY74FCT2245ATSOCT, CY74FCT2245CTSOCT, CY74FCT2245TSOC, and CY74FCT2245TSOCT represent the CY74FCT2245 base product number variant. These parts maintain full temperature range compatibility (-40°C ~ 85°C) and ROHS3 compliance but feature reduced low-side output current (12mA versus 64mA). Selection of this series requires circuit-level analysis to confirm adequate drive capability for target load impedance.

All substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and identical package geometry, ensuring mechanical and environmental compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can CD74FCT245M96 replace 74FCT245CTSOG8 in all applications?

A: CD74FCT245M96 provides electrical equivalence with matched output current specifications. The narrower operating temperature range (0°C ~ 70°C) restricts use to applications within this thermal envelope. Designs requiring -40°C operation must select alternative parts with extended temperature ratings.

Q: What is the difference between CY74FCT245 and CY74FCT2245 series substitutes?

A: Both series maintain the same logic function, package, and supply voltage. The primary difference is output current: CY74FCT245 variants provide 32mA or 15mA high-side current, while CY74FCT2245 variants provide 15mA high-side current with reduced low-side current (12mA versus 64mA). Circuit load requirements determine which series is appropriate.

Q: Are packaging format variations (Tape & Reel, Tube, Bulk) electrically equivalent?

A: Yes. Packaging format affects only handling and assembly logistics. All variants of a given part number maintain identical electrical specifications and functional performance.

Q: Does the 74FCT245CTSOG8 Last Time Buy status affect substitute selection?

A: Yes. The original part is no longer in production. All listed substitutes maintain active product status from their respective manufacturers, ensuring long-term supply availability and continued manufacturing support.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts maintain ROHS3 compliance and MSL Level 1 moisture sensitivity rating, matching the environmental and regulatory specifications of the original 74FCT245CTSOG8.

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