74FCT245ATSOG Equivalent & Substitute Parts

Part Overview

The 74FCT245ATSOG is a non-inverting transceiver logic IC manufactured by Renesas Electronics Corporation. This 20-SOIC surface mount device functions as a 1-element, 8-bit per element transceiver with 3-state output capability, operating within the 4.75V to 5.25V supply voltage range. The part is currently in active production status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts are necessary when the original manufacturer part becomes unavailable, when alternative packaging formats are required for assembly processes, or when inventory constraints necessitate sourcing from alternative manufacturers while maintaining functional and electrical equivalence.

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	15mA / 64mA
Voltage - Supply	4.75V ~ 5.25V
Operating Temperature	-40°C ~ 85°C (TA)
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 74FCT245ATSOG is determined by the following critical parameters:

Mandatory Equivalence Criteria:

Logic Type: Transceiver, Non-Inverting
Number of Elements: 1
Number of Bits per Element: 8
Output Type: 3-State
Package / Case: 20-SOIC (0.295", 7.50mm Width)
Voltage - Supply: 4.75V ~ 5.25V
Mounting Type: Surface Mount

Allowable Variation Parameters:

Current - Output High / Low: Substitute parts may have equal or higher current ratings
Operating Temperature: Substitute parts with -40°C ~ 85°C operating range are fully equivalent; parts with 0°C ~ 70°C range have a narrower temperature specification
Packaging Format: Tube, Tape & Reel (TR), Cut Tape (CT), or Bulk packaging are interchangeable for functional equivalence
Manufacturer: Renesas Electronics Corporation, Texas Instruments, and Cypress Semiconductor Corp all produce compatible 74FCT series logic devices

Substitute parts are grouped into two categories based on base product number: 74FCT245 variants (single 8-bit transceiver) and 74FCT2245 variants (dual 8-bit transceiver). The 74FCT2245 devices are functionally compatible when only a single transceiver element is utilized in the application circuit.

Parameter Comparison

Part Number	Manufacturer	Packaging	Current High/Low (mA)	Operating Temp (°C)	Base Product	RoHS Status
74FCT245ATSOG	Renesas Electronics	Tube	15 / 64	-40 ~ 85	74FCT245	RoHS3
CD74FCT245M96	Texas Instruments	Tape & Reel	15 / 64	0 ~ 70	74FCT245	RoHS3
CY74FCT245ATSOC	Texas Instruments	Tube	32 / 64	-40 ~ 85	74FCT245	RoHS3
CY74FCT245ATSOCT	Texas Instruments	Tape & Reel	32 / 64	-40 ~ 85	74FCT245	RoHS3
CY74FCT245CTSOC	Texas Instruments	Tube	32 / 64	-40 ~ 85	74FCT245	RoHS3
CY74FCT245TSOC	Cypress Semiconductor	Bulk	32 / 64	-40 ~ 85	74FCT245	Not specified
CY74FCT2245ATSOC	Texas Instruments	Tube	15 / 12	-40 ~ 85	74FCT2245	RoHS3
CY74FCT2245ATSOCT	Texas Instruments	Tape & Reel	15 / 12	-40 ~ 85	74FCT2245	RoHS3
CY74FCT2245CTSOCT	Texas Instruments	Tape & Reel	15 / 12	-40 ~ 85	74FCT2245	RoHS3
CY74FCT2245TSOC	Texas Instruments	Tube	15 / 12	-40 ~ 85	74FCT2245	RoHS3
CY74FCT2245TSOCT	Cypress Semiconductor	Bulk	15 / 12	-40 ~ 85	74FCT2245	Not specified

Engineering Selection Recommendations

Primary Substitutes (74FCT245 Base Product):

CY74FCT245ATSOC and CY74FCT245ATSOCT are direct functional equivalents with enhanced output current capability (32mA high vs. 15mA). Both maintain the full -40°C to 85°C operating temperature range and RoHS3 compliance. These parts are suitable for applications requiring higher drive current while maintaining identical logic functionality and package footprint.

CD74FCT245M96 from Texas Instruments provides equivalent current specifications (15mA / 64mA) but operates within a narrower temperature range (0°C to 70°C). This part is appropriate for applications with ambient temperature constraints within this specification window and where Tape & Reel packaging is preferred for automated assembly.

CY74FCT245CTSOC and CY74FCT245TSOC offer enhanced output current with full temperature range coverage. CY74FCT245TSOC is available in Bulk packaging from Cypress Semiconductor Corp.

Secondary Substitutes (74FCT2245 Base Product):

CY74FCT2245ATSOC, CY74FCT2245ATSOCT, CY74FCT2245CTSOCT, CY74FCT2245TSOC, and CY74FCT2245TSOCT are dual-transceiver variants that provide functional equivalence when only a single transceiver element is required. These parts maintain full -40°C to 85°C temperature range and RoHS3 compliance. Output current specifications differ (15mA high / 12mA low), which must be evaluated against application requirements.

All substitute parts maintain identical 20-SOIC package geometry, surface mount mounting type, and 4.75V to 5.25V supply voltage specification. Product status is active for all listed alternatives.

Frequently Asked Questions (FAQ)

Q: Can I use a 74FCT2245 variant as a direct replacement for the 74FCT245ATSOG?

A: Yes. The 74FCT2245 is a dual-transceiver device containing two independent 8-bit transceiver elements. When only one transceiver element is required in the application circuit, the 74FCT2245 variants are functionally compatible. The unused transceiver element can be disabled or left unconnected. All electrical parameters, package footprint, and operating conditions remain equivalent.

Q: What is the difference between Tube, Tape & Reel, and Bulk packaging?

A: Packaging format affects component handling and assembly processes but does not alter electrical function or performance. Tube packaging is suitable for manual assembly and lower-volume production. Tape & Reel (TR) and Cut Tape (CT) formats are optimized for automated pick-and-place assembly equipment. Bulk packaging is used for high-volume applications. All formats contain identical die and electrical specifications.

Q: Why do some substitute parts have higher output current ratings (32mA vs. 15mA)?

A: Higher output current capability is a superset specification that maintains backward compatibility. Parts rated for 32mA output high current can drive heavier loads than the original 15mA specification. This enhanced capability does not affect functionality in applications designed for the original 15mA rating and provides additional design margin for current-limited applications.

Q: Is the CD74FCT245M96 with 0°C to 70°C operating range suitable for my application?

A: The CD74FCT245M96 is suitable only if your application operates within the 0°C to 70°C ambient temperature range. If your design requires operation below 0°C or above 70°C, select a substitute part with the full -40°C to 85°C specification, such as CY74FCT245ATSOC or CY74FCT245ATSOCT.

Q: Are all substitute parts RoHS3 compliant?

A: All 74FCT245 and 74FCT2245 variants from Texas Instruments are explicitly RoHS3 compliant. Cypress Semiconductor Corp variants (CY74FCT245TSOC and CY74FCT2245TSOCT) do not have RoHS status specified in the provided data. Verify RoHS compliance requirements with your procurement or quality assurance department before selecting Cypress variants.

Q: Can I mix different manufacturers' parts in the same production batch?

A: Yes. All listed substitute parts maintain identical electrical specifications, package geometry, and functional behavior. Parts from Renesas Electronics Corporation, Texas Instruments, and Cypress Semiconductor Corp are interchangeable from a functional and mechanical standpoint. Verify that your quality assurance and procurement procedures permit multi-source component selection.

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