CD74HCT245M Equivalent & Substitute Parts

Part Overview

The CD74HCT245M is a non-inverting transceiver logic IC manufactured by Texas Instruments, designed for 8-bit data bus applications with 3-state output capability. This part operates across a 4.5V to 5.5V supply range and is housed in a 20-SOIC surface mount package. The CD74HCT245M is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing production and maintenance applications. Substitute parts maintain functional equivalence through identical logic architecture, pin configuration, and electrical performance within specified operating parameters.

Substiute Parts

CD74HCT245M

Texas InstrumentsIn Stock: 1177CD74HCT245M Datasheet

Current PartRFQ

CD74HCT245M96

Texas InstrumentsIn Stock: 1178CD74HCT245M96 Datasheet

DirectRFQ

MC74HCT245ADWR2G

onsemiIn Stock: 2154MC74HCT245ADWR2G Datasheet

DirectRFQ

MM74HCT245WM

Fairchild SemiconductorIn Stock: 2596MM74HCT245WM Datasheet

DirectRFQ

74HCT245D,653

Nexperia USA Inc.In Stock: 1023974HCT245D,653 Datasheet

MFR RecommendedRFQ

MC74HCT245ADWG

onsemiIn Stock: 2119MC74HCT245ADWG Datasheet

MFR RecommendedRFQ

MM74HCT245WMX

onsemiIn Stock: 1824MM74HCT245WMX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HCT245M is determined by strict adherence to the following parameters:

• Logic type must be Transceiver, Non-Inverting
• Configuration must be 1 element with 8 bits per element
• Output type must be 3-State
• Supply voltage range must encompass 4.5V ~ 5.5V
• Package must be 20-SOIC or mechanically equivalent 20-SO
• Mounting type must be Surface Mount
• Base product number must be 74HCT245

All substitute parts listed maintain these core electrical and mechanical specifications. Variations in output current, operating temperature range, packaging format (Tube, Tape & Reel, Cut Tape), and moisture sensitivity level do not affect functional substitution within the defined parameter set.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts are functionally equivalent to the CD74HCT245M and maintain active product status with established supply chains, except the original part which is discontinued. Selection among substitutes should be based on:

Supply Chain Availability: CD74HCT245M96 (Texas Instruments, Tape & Reel) provides direct manufacturer continuity with identical electrical specifications and active status.

Compliance and Certification: All substitute parts maintain ROHS3 compliance and REACH unaffected status. Moisture sensitivity levels vary (MSL 1 or MSL 3); applications requiring unlimited moisture exposure should prioritize MSL 1 rated parts (CD74HCT245M96, 74HCT245D,653).

Temperature Range Considerations: MC74HCT245ADWG and CD74HCT245M96 support the full -55°C to 125°C operating range matching the original part. MM74HCT245WM and MM74HCT245WMX are limited to -40°C to 85°C and should be selected only when application temperature requirements fall within this narrower range.

Output Current Capability: Parts with 6mA or 7.2mA output current (MC74HCT245ADWR2G, 74HCT245D,653, MC74HCT245ADWG, MM74HCT245WM, MM74HCT245WMX) provide higher drive capability than the original 4mA specification and are suitable for applications requiring increased fanout or lower impedance loads.

Frequently Asked Questions (FAQ)

Q: Can I directly replace CD74HCT245M with any of these substitute parts?

A: Yes, all listed parts are functionally equivalent within the 74HCT245 logic family. Pin configuration, logic function, and electrical operating parameters are identical. Physical package dimensions (20-SOIC) are standardized across all parts.

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

A: These are packaging and delivery formats only. Tube packaging is used for manual handling and small quantities. Tape & Reel and Cut Tape formats are for automated assembly processes. The IC itself is electrically identical regardless of packaging format.

Q: Why do some parts have higher output current ratings (6mA or 7.2mA) compared to the original 4mA?

A: Higher output current capability indicates greater drive strength and fanout capacity. These parts can source or sink more current while maintaining specified voltage levels. They are backward compatible with applications designed for 4mA output and provide additional design margin for demanding loads.

Q: Does operating temperature range affect substitution compatibility?

A: Operating temperature range defines the guaranteed performance envelope. Parts with -40°C to 85°C range are suitable only for applications within this window. For applications requiring -55°C operation, select CD74HCT245M96 or MC74HCT245ADWG. For applications requiring 125°C operation, select CD74HCT245M96, 74HCT245D,653, or MC74HCT245ADWG.

Q: What is Moisture Sensitivity Level (MSL) and why does it matter?

A: MSL indicates the maximum time a component can be exposed to ambient humidity before soldering without risk of delamination or internal corrosion. MSL 1 (Unlimited) parts have no time restriction. MSL 3 (168 Hours) parts must be soldered within 168 hours of package opening. Select MSL 1 for applications with extended storage or handling periods.

Q: Are all these parts RoHS compliant?

A: All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the environmental compliance profile of the original CD74HCT245M.