CY74FCT245CTSOCT Equivalent & Substitute Parts

Part Overview

The CY74FCT245CTSOCT is a non-inverting octal bus transceiver manufactured by Texas Instruments, designed for 3-state output applications in logic circuits. This device operates within the 4.75V to 5.25V supply voltage range and supports 8-bit bidirectional data transfer with independent control lines. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity.

Substiute Parts

CY74FCT245CTSOCT

Texas InstrumentsIn Stock: 2006CY74FCT245CTSOCT Datasheet

Current PartRFQ

CY74FCT245ATSOCT

Texas InstrumentsIn Stock: 2091CY74FCT245ATSOCT Datasheet

Parametric EquivalentRFQ

CY74FCT245TSOCT

Texas InstrumentsIn Stock: 1174CY74FCT245TSOCT Datasheet

Parametric EquivalentRFQ

74FCT2245ATSOG8

IDT, Integrated Device Technology IncIn Stock: 1705374FCT2245ATSOG8 Datasheet

MFR RecommendedRFQ

74FCT245ATSOG

Renesas Electronics CorporationIn Stock: 73374FCT245ATSOG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CY74FCT245CTSOCT are classified based on strict parametric equivalence. The primary substitution criteria are:

Core Electrical Parameters (Must Match):

• Logic Type: Transceiver, Non-Inverting
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: 3-State
• Voltage - Supply: 4.75V ~ 5.25V
• Operating Temperature: -40°C ~ 85°C (TA)
• Package / Case: 20-SOIC (0.295", 7.50mm Width)

Secondary Considerations:

• Current output ratings (High/Low) may vary within acceptable design margins
• Product status (Active vs. Obsolete) affects long-term availability
• Packaging format (Tape & Reel, Bulk, Tube) affects procurement and handling

Substitutes are grouped into two categories:

Parametric Equivalents (Texas Instruments): CY74FCT245ATSOCT and CY74FCT245TSOCT maintain identical electrical specifications and are direct replacements with improved availability (Active status).

Manufacturer Recommended Alternatives: 74FCT2245ATSOG8 (IDT) and 74FCT245ATSOG (Renesas) provide functional equivalence with variations in output current ratings and packaging formats.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement):

CY74FCT245ATSOCT and CY74FCT245TSOCT are the preferred alternatives. Both are manufactured by Texas Instruments with Active product status, ensuring long-term availability and supply chain continuity. These parts maintain identical electrical specifications to the CY74FCT245CTSOCT, including output current ratings of 32mA (High) and 64mA (Low). Both are ROHS3 compliant with MSL 1 rating. The primary difference is packaging format: CY74FCT245ATSOCT is supplied in Tape & Reel format with 2000 units in stock, while CY74FCT245TSOCT is also in Tape & Reel format with 1153 units available.

Alternative Substitutes (Functional Equivalents with Considerations):

74FCT2245ATSOG8 (IDT, Bulk packaging) provides functional equivalence but with reduced output current ratings (15mA High, 12mA Low). This part is suitable for applications where lower drive current is acceptable. With 17037 units in stock, it offers superior availability.

74FCT245ATSOG (Renesas Electronics, Tube packaging) maintains the original 64mA Low output current but reduces High output current to 15mA. This part is Active with 666 units in stock and is suitable for designs where asymmetric output current is acceptable.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and REACH Unaffected status, meeting environmental and regulatory requirements equivalent to the original part.

Frequently Asked Questions (FAQ)

Q: Can CY74FCT245ATSOCT and CY74FCT245TSOCT be used as direct replacements for CY74FCT245CTSOCT?

A: Yes. Both parts are parametrically equivalent with identical electrical specifications, including output current ratings, supply voltage range, operating temperature, and package configuration. The primary difference is product status (Active vs. Obsolete) and packaging format (Tape & Reel vs. standard packaging).

Q: What is the difference between the Texas Instruments substitutes and the IDT/Renesas alternatives?

A: Texas Instruments substitutes (CY74FCT245ATSOCT, CY74FCT245TSOCT) maintain identical output current specifications (32mA, 64mA). IDT and Renesas alternatives provide functional equivalence but with reduced output current ratings. IDT's 74FCT2245ATSOG8 offers the lowest current (15mA, 12mA), while Renesas' 74FCT245ATSOG maintains 64mA Low output current.

Q: Are there any package compatibility issues when substituting these parts?

A: All substitute parts use the 20-SOIC package with identical physical dimensions (0.295", 7.50mm Width). PCB footprints are compatible across all listed substitutes. Packaging format differences (Tape & Reel, Bulk, Tube) affect procurement and handling but not electrical or mechanical compatibility.

Q: Which substitute should be selected for new designs?

A: For new designs, select CY74FCT245ATSOCT or CY74FCT245TSOCT (Texas Instruments, Active status) to ensure long-term supply availability and support. These parts maintain full electrical equivalence to the original specification.

Q: Can 74FCT2245ATSOG8 be used if output current requirements are lower?

A: Yes, if your circuit design permits reduced output current (15mA High, 12mA Low), 74FCT2245ATSOG8 is a valid substitute. Verify that downstream logic can operate within these current specifications before implementation.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts are ROHS3 compliant, REACH Unaffected, and carry identical environmental and regulatory certifications to the original CY74FCT245CTSOCT.