74HCT165N,652 Equivalent & Substitute Parts

Part Overview

The 74HCT165N,652 is an 8-bit parallel-in serial-out shift register manufactured by NXP Semiconductors in a 16-DIP through-hole package. This logic component converts parallel data inputs to serial output format and is commonly used in data acquisition, multiplexing, and serial communication applications. The part is currently obsolete, making equivalent substitutes necessary for new designs, repairs, and legacy system maintenance. Substitute parts must maintain functional equivalence through matching logic type, bit width, input/output configuration, and electrical specifications.

Substiute Parts

74HCT165N,652

NXP SemiconductorsIn Stock: 110974HCT165N,652 Datasheet

Current PartRFQ

CD74HCT165E

Harris CorporationIn Stock: 25451CD74HCT165E Datasheet

DirectRFQ

74HCT165D,653

Nexperia USA Inc.In Stock: 3629074HCT165D,653 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74HCT165N,652 is determined by the following critical parameters:

• Logic Function: All substitutes must perform parallel-in serial-out shift register operation with 8-bit capacity
• Electrical Compatibility: Supply voltage range (4.5V ~ 5.5V) and output type (Complementary) must match
• Pin Configuration: Base product number 74HCT165 ensures functional pin compatibility
• Package Consideration: Substitutes may differ in mounting type (through-hole vs. surface mount) and physical package dimensions, provided the functional pinout remains compatible

Two substitute categories exist: direct pin-compatible through-hole alternatives and functionally equivalent surface-mount options for new designs.

Parameter Comparison

Engineering Selection Recommendations

For Through-Hole Replacement (Direct Pin Substitution): The CD74HCT165E provides direct 16-DIP package compatibility with the 74HCT165N,652. Both parts share identical pinouts and electrical specifications. However, the CD74HCT165E is RoHS non-compliant, whereas the original part meets ROHS3 requirements. This substitute is suitable for legacy system repairs where RoHS compliance is not a design constraint.

For New Designs and Active Production (Recommended): The 74HCT165D,653 is the manufacturer-recommended substitute. It is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating. The transition to surface-mount 16-SOIC packaging reflects modern manufacturing practices. This part maintains all functional and electrical equivalence while offering superior supply chain availability and compliance posture. Design migration to surface-mount assembly is required.

Compliance Considerations:

• Original part (74HCT165N,652): ROHS3 Compliant, Obsolete
• CD74HCT165E: RoHS non-compliant, Obsolete
• 74HCT165D,653: ROHS3 Compliant, Active

Frequently Asked Questions (FAQ)

Q: Can the CD74HCT165E be used as a direct replacement for the 74HCT165N,652? A: Yes. Both parts use the 16-DIP package with identical pinouts and electrical specifications (4.5V ~ 5.5V supply, 8-bit parallel-in serial-out function, complementary output). The primary difference is RoHS compliance status. The CD74HCT165E is suitable for applications where RoHS compliance is not required.

Q: Why is the 74HCT165D,653 recommended over the CD74HCT165E? A: The 74HCT165D,653 is in active production with ROHS3 compliance and unlimited moisture sensitivity rating, ensuring long-term supply chain availability. The CD74HCT165E is obsolete and RoHS non-compliant. For new designs, the 74HCT165D,653 is the preferred choice.

Q: Does the 74HCT165D,653 require circuit board redesign? A: Yes. The 74HCT165D,653 uses 16-SOIC surface-mount packaging (0.154" width) instead of the through-hole 16-DIP package (0.300" width). PCB layout and assembly process changes are required. Functional pinout compatibility is maintained.

Q: Are all three parts electrically interchangeable? A: Yes, within their respective package constraints. All three parts operate at 4.5V ~ 5.5V supply voltage, perform 8-bit parallel-in serial-out shift register functions, and produce complementary outputs. Package and mounting type differences do not affect electrical function.

Q: What is the temperature operating range difference between substitutes? A: The CD74HCT165E operates from -55°C to 125°C, providing a 15°C lower minimum temperature rating compared to the 74HCT165N,652 and 74HCT165D,653 (-40°C to 125°C). This extended low-temperature range may be beneficial for industrial or aerospace applications.