MM74HCT164N Equivalent & Substitute Parts

Part Overview

The MM74HCT164N is an 8-bit serial-to-parallel shift register manufactured by onsemi, housed in a 14-DIP package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The shift register converts serial input data into parallel output across 8 bits, operating at supply voltages between 4.5V and 5.5V with push-pull output configuration.

Substiute Parts

MM74HCT164N

onsemiIn Stock: 1295MM74HCT164N Datasheet

Current PartRFQ

CD74HCT164E

Texas InstrumentsIn Stock: 1843CD74HCT164E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the MM74HCT164N is determined by strict equivalence across the following parameters:

• Logic type and function (Shift Register, Serial to Parallel conversion)
• Bit configuration (8-bit, single element)
• Output characteristics (Push-Pull)
• Supply voltage range (4.5V ~ 5.5V)
• Physical package (14-DIP with 0.300" pitch, 7.62mm)
• Mounting method (Through Hole)

The CD74HCT164E from Texas Instruments meets all these criteria and qualifies as a direct substitute. Both parts share the 74HCT base product number, confirming functional and electrical equivalence within the specified parameters.

Parameter Comparison

Engineering Selection Recommendations

The CD74HCT164E is the qualified substitute for the MM74HCT164N. The substitute part maintains full electrical and mechanical compatibility across all critical parameters. The CD74HCT164E offers an extended operating temperature range (-55°C to 125°C versus -40°C to 85°C), providing additional margin for demanding thermal environments. The substitute part carries Active product status with RoHS3 compliance, ensuring long-term availability and regulatory alignment. Both parts are REACH Unaffected and classified under ECCN EAR99.

Frequently Asked Questions (FAQ)

Q: Can the CD74HCT164E directly replace the MM74HCT164N in existing designs?

A: Yes. Both parts are 14-DIP through-hole packages with identical pinouts, supply voltage requirements (4.5V ~ 5.5V), and serial-to-parallel shift register functionality. No circuit modifications are required.

Q: What is the difference in operating temperature ranges?

A: The MM74HCT164N operates from -40°C to 85°C, while the CD74HCT164E operates from -55°C to 125°C. The CD74HCT164E provides extended temperature coverage, making it suitable for applications requiring wider thermal operating ranges.

Q: Why is the MM74HCT164N listed as obsolete?

A: Obsolete status indicates the part is no longer manufactured by onsemi. The CD74HCT164E from Texas Instruments provides functional continuity for applications currently using the MM74HCT164N.

Q: Are there any compliance differences between these parts?

A: The CD74HCT164E is RoHS3 compliant, while the MM74HCT164N does not specify RoHS status. Both parts are REACH Unaffected and carry the same ECCN and HTSUS classifications.

Q: Can I use these parts interchangeably in new designs?

A: Yes. The CD74HCT164E is the recommended choice for new designs due to its active product status, extended temperature range, and RoHS3 compliance.