74F245MSA Equivalent & Substitute Parts

Part Overview

The 74F245MSA is a non-inverting transceiver IC manufactured by onsemi, designed for 8-bit bidirectional data transfer with 3-state output capability. This component operates within a 4.5V to 5.5V supply voltage range and is housed in a 20-SSOP surface mount package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

74F245MSA

onsemiIn Stock: 229574F245MSA Datasheet

Current PartRFQ

SN74F245DBR

Texas InstrumentsIn Stock: 3299SN74F245DBR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74F245MSA is determined by strict equivalence across the following critical parameters:

• Logic type and function: Non-inverting transceiver architecture
• Data width: 1 element with 8 bits per element
• Output configuration: 3-state output capability
• Output current specifications: 3mA/24mA (high), 15mA/64mA (low)
• Supply voltage range: 4.5V to 5.5V
• Operating temperature range: 0°C to 70°C
• Package type: 20-SSOP surface mount with identical physical dimensions (0.209", 5.30mm width)

The SN74F245DBR from Texas Instruments meets all these criteria and is classified as an active product, providing a direct functional and electrical equivalent.

Parameter Comparison

Engineering Selection Recommendations

The SN74F245DBR is the direct equivalent for the obsolete 74F245MSA. Both components share identical electrical specifications, functional architecture, and physical packaging. The primary distinction is product status: the SN74F245DBR maintains active production and support from Texas Instruments, while the 74F245MSA is no longer manufactured by onsemi.

For new designs or system replacements requiring the 74F245 transceiver function, the SN74F245DBR is the appropriate selection. The part is RoHS3 compliant and carries REACH unaffected status, meeting current regulatory requirements. Inventory availability of the SN74F245DBR (3256 pcs in stock) supports both immediate procurement and long-term supply chain planning.

Frequently Asked Questions (FAQ)

Q: Can the SN74F245DBR directly replace the 74F245MSA in existing designs?

A: Yes. Both parts are electrically and functionally identical across all specified parameters, including output current, supply voltage, operating temperature, and package dimensions. No circuit modifications are required.

Q: Are there differences in packaging between these parts?

A: No. Both the 74F245MSA and SN74F245DBR use the 20-SSOP surface mount package with identical physical dimensions (0.209" width, 5.30mm). They are compatible with the same PCB footprints and assembly processes.

Q: What is the significance of the product status difference?

A: The 74F245MSA is classified as obsolete, indicating onsemi has discontinued manufacturing. The SN74F245DBR is active, meaning Texas Instruments continues production and provides ongoing technical support. For new applications, the active part ensures long-term availability and supply chain stability.

Q: Do compliance certifications differ between these parts?

A: The SN74F245DBR carries RoHS3 compliance certification. Both parts are REACH unaffected and share the same ECCN (EAR99) and HTSUS (8542.39.0001) classifications.

Q: Are the output current specifications identical?

A: Yes. Both parts specify 3mA and 24mA for output high current, and 15mA and 64mA for output low current. They are fully equivalent in drive capability.