CD74HCT652M Equivalent & Substitute Parts

Part Overview

The CD74HCT652M is a non-inverting transceiver IC manufactured by Texas Instruments, designed for 8-bit data bus applications with 3-state output capability. This device operates within the 4.5V to 5.5V supply voltage range and is classified as an active product. The need for equivalent and substitute parts arises from inventory availability, supply chain considerations, and application-specific requirements where alternative logic families or manufacturers may be necessary.

Substiute Parts

CD74HCT652M

Texas InstrumentsIn Stock: 913CD74HCT652M Datasheet

Current PartRFQ

MC74ACT652DWR2G

onsemiIn Stock: 1070MC74ACT652DWR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD74HCT652M is determined by the following critical parameters:

• Logic Family Compatibility: The CD74HCT652M belongs to the 74HCT family. Substitutes must maintain the same functional logic type (Transceiver, Non-Inverting) and bit configuration (1 Element, 8 Bits per Element).
• Package Compatibility: All substitutes must use the 24-SOIC package format to ensure mechanical and electrical compatibility with existing PCB layouts.
• Voltage Supply Range: The supply voltage range of 4.5V to 5.5V must be maintained or exceeded by substitute parts.
• Output Configuration: 3-State output capability is a functional requirement for bus transceiver applications.
• Output Current Capability: Substitute parts must meet or exceed the output current specifications (6mA minimum for both high and low states).
• Operating Temperature Range: The operating temperature range must encompass or exceed -55°C to 125°C.
• Compliance Standards: RoHS3 compliance and REACH unaffected status are mandatory for regulatory adherence.

The MC74ACT652DWR2G from onsemi qualifies as a substitute based on matching logic type, bit configuration, package format, voltage supply range, and output type, despite differences in output current capability and operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

CD74HCT652M (Primary Selection)

The CD74HCT652M is the recommended primary choice for new designs and applications. This device maintains active product status from Texas Instruments, ensuring long-term availability and supply chain stability. The extended operating temperature range (-55°C to 125°C) accommodates industrial and automotive applications. MSL Level 1 classification provides unlimited shelf life without moisture sensitivity constraints, reducing handling and storage requirements.

MC74ACT652DWR2G (Substitute Selection)

The MC74ACT652DWR2G from onsemi serves as a functional substitute where supply constraints or specific application requirements necessitate an alternative. This part provides higher output current capability (24mA versus 6mA), which may benefit applications requiring increased drive strength. However, the obsolete product status and reduced operating temperature range (-40°C to 85°C) limit its suitability for new designs or extended-temperature applications. MSL Level 3 classification requires controlled moisture exposure during storage and handling.

Selection between these parts should prioritize the CD74HCT652M for new designs, active production, and applications requiring extended temperature operation or unlimited shelf life. The MC74ACT652DWR2G is appropriate only where existing inventory exists or where the reduced temperature range and higher output current are compatible with application requirements.

Frequently Asked Questions (FAQ)

Q: Can the MC74ACT652DWR2G directly replace the CD74HCT652M in existing designs?

A: Mechanical and functional replacement is possible due to identical package format (24-SOIC) and matching logic configuration (1 Element, 8 Bit Transceiver, Non-Inverting, 3-State Output). However, the reduced operating temperature range (-40°C to 85°C versus -55°C to 125°C) and obsolete product status must be evaluated against application requirements.

Q: What are the key differences in output current capability?

A: The MC74ACT652DWR2G provides 24mA output current (high and low), compared to 6mA for the CD74HCT652M. This higher current capability may reduce propagation delays and improve signal integrity in high-capacitance bus applications, but does not affect functional compatibility.

Q: Are both parts RoHS3 compliant?

A: Yes, both the CD74HCT652M and MC74ACT652DWR2G are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What is the significance of MSL Level differences?

A: The CD74HCT652M (MSL Level 1) has unlimited shelf life and requires no special moisture control. The MC74ACT652DWR2G (MSL Level 3) requires moisture exposure control limited to 168 hours at specified humidity levels, necessitating proper storage and handling procedures.

Q: Why is the CD74HCT652M preferred for new designs?

A: The CD74HCT652M maintains active product status, ensuring continued availability and manufacturer support. The extended operating temperature range accommodates broader application requirements, and MSL Level 1 classification eliminates moisture sensitivity constraints during manufacturing and assembly.