74FCT245ATSOG8 Equivalent & Substitute Parts

Part Overview

The 74FCT245ATSOG8 is a non-inverting transceiver logic IC manufactured by Renesas Electronics Corporation, configured as a single element with 8 bits per element and 3-state output capability. The device operates at 4.75V to 5.25V supply voltage with an operating temperature range of -40°C to 85°C in a 20-SOIC surface mount package. This part is designated as Last Time Buy status, making identification of functionally equivalent alternatives essential for ongoing design support and procurement planning.

Key Parameters

Parameter	Value
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 (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 74FCT245ATSOG8 is determined by strict equivalence across the following critical parameters:

Primary Substitution 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

Secondary Compatibility Factors:

Operating Temperature Range: Must support at minimum -40°C to 85°C
Current Output Specifications: Output High and Low current ratings must meet or exceed the original specification
RoHS and Compliance Status: ROHS3 compliance required

Substitute parts are grouped into two functional categories based on base product number:

Category 1: 74FCT245 Series - Direct functional equivalents with identical element and bit configuration. Output current specifications may vary (15mA/32mA High, 64mA Low).

Category 2: 74FCT2245 Series - Functionally compatible with identical logic configuration but different base product designation. Output current specifications differ (15mA High, 12mA Low).

All listed substitutes maintain the 20-SOIC package, surface mount configuration, and 4.75V to 5.25V supply voltage range. Packaging format (Tape & Reel, Tube, Bulk, Cut Tape) does not affect functional equivalence but impacts procurement and assembly processes.

Parameter Comparison

Part Number	Manufacturer	Base Series	Logic Type	Output Current (High/Low)	Operating Temp	Package	Product Status	Packaging Format
74FCT245ATSOG8	Renesas Electronics	74FCT245	Transceiver, Non-Inverting	15mA / 64mA	-40°C ~ 85°C	20-SOIC	Last Time Buy	Tape & Reel
CD74FCT245M96	Texas Instruments	74FCT245	Transceiver, Non-Inverting	15mA / 64mA	0°C ~ 70°C	20-SOIC	Active	Tape & Reel
CY74FCT245ATSOC	Texas Instruments	74FCT245	Transceiver, Non-Inverting	32mA / 64mA	-40°C ~ 85°C	20-SOIC	Active	Tube
CY74FCT245ATSOCT	Texas Instruments	74FCT245	Transceiver, Non-Inverting	32mA / 64mA	-40°C ~ 85°C	20-SOIC	Active	Tape & Reel
CY74FCT245CTSOC	Texas Instruments	74FCT245	Transceiver, Non-Inverting	32mA / 64mA	-40°C ~ 85°C	20-SOIC	Active	Tube
CY74FCT245TSOC	Cypress Semiconductor	74FCT245	Transceiver, Non-Inverting	32mA / 64mA	-40°C ~ 85°C	20-SOIC	Active	Bulk
CY74FCT2245ATSOC	Texas Instruments	74FCT2245	Transceiver, Non-Inverting	15mA / 12mA	-40°C ~ 85°C	20-SOIC	Active	Tube
CY74FCT2245ATSOCT	Texas Instruments	74FCT2245	Transceiver, Non-Inverting	15mA / 12mA	-40°C ~ 85°C	20-SOIC	Active	Tape & Reel
CY74FCT2245CTSOCT	Texas Instruments	74FCT2245	Transceiver, Non-Inverting	15mA / 12mA	-40°C ~ 85°C	20-SOIC	Active	Tape & Reel
CY74FCT2245TSOC	Texas Instruments	74FCT2245	Transceiver, Non-Inverting	15mA / 12mA	-40°C ~ 85°C	20-SOIC	Active	Tube
CY74FCT2245TSOCT	Cypress Semiconductor	74FCT2245	Transceiver, Non-Inverting	15mA / 12mA	-40°C ~ 85°C	20-SOIC	Active	Bulk

Engineering Selection Recommendations

For Direct 74FCT245 Series Replacement:

CY74FCT245ATSOCT and CY74FCT245ATSOC are the primary alternatives within the 74FCT245 base series. Both maintain full compatibility with the original 74FCT245ATSOG8 across all critical parameters including the -40°C to 85°C operating temperature range and ROHS3 compliance. CY74FCT245ATSOCT is available in Tape & Reel packaging, matching the original procurement format. These parts feature enhanced output current capability (32mA High vs. 15mA original), providing additional design margin for high-current applications.

CD74FCT245M96 from Texas Instruments offers the same output current specification as the original part (15mA/64mA) but operates within a reduced temperature range (0°C to 70°C). This part is suitable only for applications not requiring the full -40°C to 85°C temperature specification.

For 74FCT2245 Series Consideration:

CY74FCT2245ATSOCT and CY74FCT2245CTSOCT provide functional transceiver operation with identical logic configuration and full temperature range support (-40°C to 85°C). These parts feature reduced output current specifications (15mA High, 12mA Low) compared to the original. Selection of 74FCT2245 variants is appropriate only when circuit design accommodates the lower output current ratings.

Compliance and Availability:

All recommended substitutes maintain ROHS3 compliance and MSL Level 1 rating. All listed alternatives carry Active product status, ensuring long-term availability and manufacturing support. Packaging format selection (Tape & Reel, Tube, Bulk) should align with assembly process requirements and procurement volume.

Frequently Asked Questions (FAQ)

Q: Can CD74FCT245M96 replace 74FCT245ATSOG8 in all applications?

A: CD74FCT245M96 is functionally equivalent for logic operation but operates within a 0°C to 70°C temperature range. It is suitable only for applications that do not require the full -40°C to 85°C operating temperature specification of the original part. Verify application temperature requirements before selection.

Q: What is the difference between 74FCT245 and 74FCT2245 series substitutes?

A: Both series provide identical transceiver logic functionality in the 20-SOIC package. The primary difference is output current capability. 74FCT245 variants deliver 15mA to 32mA High and 64mA Low current. 74FCT2245 variants deliver 15mA High and 12mA Low current. Selection depends on circuit current requirements at the output pins.

Q: Does packaging format affect functional compatibility?

A: Packaging format (Tape & Reel, Tube, Bulk, Cut Tape) does not affect the electrical or functional characteristics of the IC. Format selection impacts procurement logistics and assembly process compatibility. Tape & Reel format is standard for automated assembly; Tube and Bulk formats are used for manual assembly or lower-volume applications.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts maintain ROHS3 compliance status, matching the original 74FCT245ATSOG8. Compliance certifications are consistent across all alternatives.

Q: Which substitute offers the best direct replacement for the 74FCT245ATSOG8?

A: CY74FCT245ATSOCT provides the most direct replacement, maintaining identical operating temperature range (-40°C to 85°C), full ROHS3 compliance, and availability in Tape & Reel packaging. The enhanced output current capability (32mA High) provides additional design margin without compromising compatibility.

Q: Can I use CY74FCT245TSOC in automated assembly processes?

A: CY74FCT245TSOC is supplied in Bulk packaging format, which is not compatible with standard tape-and-reel automated assembly equipment. This part is suitable for manual assembly or applications with lower production volumes. For automated assembly, select parts supplied in Tape & Reel format such as CY74FCT245ATSOCT.

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