SN74AHC245MDWREP Equivalent & Substitute Parts

Part Overview

The SN74AHC245MDWREP is a non-inverting bus transceiver manufactured by Texas Instruments, designed for logic-level signal conversion and buffering applications. This device operates across a supply voltage range of 2V to 5.5V and features 3-state output capability, making it suitable for bidirectional data bus applications. The part is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified based on functional equivalence within the 74AHC/74VHC transceiver families, where electrical parameters and package compatibility allow direct replacement.

Substiute Parts

SN74AHC245MDWREP

Texas InstrumentsIn Stock: 806SN74AHC245MDWREP Datasheet

Current PartRFQ

74AHC245D,118

Nexperia USA Inc.In Stock: 147474AHC245D,118 Datasheet

MFR RecommendedRFQ

74VHC245D,118

Nexperia USA Inc.In Stock: 176474VHC245D,118 Datasheet

MFR RecommendedRFQ

74VHC245M

Fairchild SemiconductorIn Stock: 992774VHC245M Datasheet

MFR RecommendedRFQ

MC74VHC245DTR2G

onsemiIn Stock: 9725MC74VHC245DTR2G Datasheet

MFR RecommendedRFQ

MC74VHC245DWG

onsemiIn Stock: 1712MC74VHC245DWG Datasheet

MFR RecommendedRFQ

MC74VHC245DWR2G

onsemiIn Stock: 2242MC74VHC245DWR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74AHC245MDWREP is determined by the following critical parameters:

• Logic Function: All substitutes must be non-inverting transceiver devices with 1 element and 8 bits per element
• Output Configuration: 3-state output capability is required
• Electrical Performance: Output current (8mA high/low) and supply voltage range (2V ~ 5.5V) must be maintained
• Package Compatibility: Surface mount packages with 20-pin configuration are acceptable, including 20-SOIC and 20-TSSOP variants
• Compliance: RoHS3 compliance is maintained across all substitutes
• Series Compatibility: Parts from 74AHC and 74VHC series families are functionally equivalent

Substitutes are grouped by manufacturer and packaging variant while maintaining full electrical and functional equivalence to the primary part.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Nexperia USA Inc.)

The 74AHC245D,118 and 74VHC245D,118 from Nexperia USA Inc. are direct functional equivalents available in Tape & Reel packaging. Both maintain RoHS3 compliance and operate within the specified supply voltage and output current parameters. The 74AHC245D,118 operates to -40°C minimum, while the 74VHC245D,118 provides identical electrical performance. Both are in active production status with high inventory availability.

Alternative Substitutes (onsemi)

The MC74VHC245DTR2G, MC74VHC245DWG, and MC74VHC245DWR2G from onsemi provide functional equivalence with variations in packaging and moisture sensitivity. The MC74VHC245DTR2G uses a 20-TSSOP package (4.40mm width) for space-constrained applications. The MC74VHC245DWG and MC74VHC245DWR2G are available in 20-SOIC packages with MSL 3 rating (168 hours). All onsemi variants operate to -40°C minimum and 85°C maximum, with RoHS3 compliance maintained.

Fairchild Semiconductor Option

The 74VHC245M from Fairchild Semiconductor is available in bulk packaging and operates within the same electrical parameters. Operating temperature range is -40°C to 85°C. This option is suitable for applications where tape and reel or tube packaging is not required.

Temperature Consideration

The primary part (SN74AHC245MDWREP) operates to -55°C minimum. Substitutes from Nexperia and onsemi operate to -40°C minimum. Applications requiring operation below -40°C must retain the original Texas Instruments part.

Frequently Asked Questions (FAQ)

Q: Can I use 74VHC series parts as direct replacements for 74AHC series?

A: Yes. Both 74AHC and 74VHC series transceiver devices in this family share identical electrical parameters including output current, supply voltage range, and 3-state output configuration. The series designation reflects manufacturing process differences but does not affect functional compatibility for this application.

Q: What is the difference between 20-SOIC and 20-TSSOP packages?

A: Both are 20-pin surface mount packages with identical pin configurations and electrical performance. The 20-TSSOP package (4.40mm width) is narrower than the 20-SOIC package (7.50mm width), making it suitable for space-constrained PCB layouts. Pin pitch and electrical characteristics remain compatible.

Q: Does packaging type (Tape & Reel, Tube, Bulk) affect electrical performance?

A: No. Packaging type affects only handling, storage, and assembly processes. Electrical performance and functional characteristics are identical regardless of packaging format. Selection should be based on manufacturing assembly requirements and inventory management practices.

Q: Why do some substitutes have different operating temperature ranges?

A: Operating temperature range reflects device qualification and testing specifications by each manufacturer. The SN74AHC245MDWREP is qualified to -55°C minimum, while most substitutes are qualified to -40°C minimum. Applications requiring operation below -40°C must use the original part or confirm substitute qualification with the manufacturer.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitutes maintain RoHS3 compliance. Compliance status is consistent across the 74AHC and 74VHC transceiver families from all listed manufacturers.

Q: What does MSL (Moisture Sensitivity Level) mean for substitution?

A: MSL indicates moisture sensitivity during storage and handling. The primary part has MSL 1 (unlimited shelf life). Some onsemi substitutes have MSL 3 (168-hour floor life after moisture exposure). MSL does not affect electrical performance but impacts storage and handling procedures. Higher MSL ratings require more stringent moisture control during assembly.