74HC166N,652 Equivalent & Substitute Parts

Part Overview

The 74HC166N,652 is an 8-bit parallel-load shift register manufactured by NXP USA Inc., housed in a 16-DIP through-hole package. This component functions as a parallel or serial to serial converter within the 74HC logic series. The part is currently listed as obsolete, making equivalent substitute parts necessary for new designs and ongoing production support. Substitute parts maintain functional equivalence while offering different packaging options or active product status from alternative manufacturers.

Substiute Parts

74HC166N,652

NXP USA Inc.In Stock: 75074HC166N,652 Datasheet

Current PartRFQ

74HC166D,653

Nexperia USA Inc.In Stock: 328474HC166D,653 Datasheet

MFR RecommendedRFQ

CD74HC166E

Texas InstrumentsIn Stock: 2015CD74HC166E Datasheet

MFR RecommendedRFQ

SN74HC166N

Texas InstrumentsIn Stock: 2388SN74HC166N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74HC166N,652 is determined by strict adherence to the following electrical and mechanical parameters:

Electrical Compatibility Requirements:

• Logic Type: Shift Register (fixed)
• Number of Elements: 1 (fixed)
• Number of Bits per Element: 8 (fixed)
• Function: Parallel or Serial to Serial (fixed)
• Output Type: Push-Pull (fixed)
• Voltage - Supply: 2V ~ 6V (fixed)

Mechanical Compatibility Requirements:

• Package / Case: 16-DIP (0.300", 7.62mm) for through-hole mounting, or 16-SOIC (0.154", 3.90mm Width) for surface mount applications
• Mounting Type: Through Hole or Surface Mount

Operational Considerations:

• Operating Temperature Range: Minimum -40°C (standard) or -55°C (extended range)
• RoHS Status: ROHS3 Compliant (required)

All substitute parts listed maintain identical electrical function and supply voltage specifications. Packaging differences (DIP vs. SOIC) determine board-level integration method but do not affect functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

For Through-Hole PCB Designs (DIP Package):

CD74HC166E (Texas Instruments) provides the widest operating temperature range (-55°C ~ 125°C), suitable for extended temperature applications. SN74HC166N (Texas Instruments) operates within -40°C ~ 85°C and maintains standard DIP packaging. Both are active products with full RoHS3 compliance.

For Surface-Mount PCB Designs (SOIC Package):

74HC166D,653 (Nexperia USA Inc.) is the only surface-mount option, utilizing 16-SOIC packaging. This part is active and RoHS3 compliant, with the highest current inventory availability (3183 units).

Product Status Consideration:

The original 74HC166N,652 is obsolete. All three substitute parts are active products, ensuring long-term availability and manufacturing support. Selection should prioritize active parts for new designs.

Frequently Asked Questions (FAQ)

Q: Can the 74HC166D,653 (SOIC) directly replace the 74HC166N,652 (DIP)?

A: No. The 74HC166D,653 uses 16-SOIC surface-mount packaging while the 74HC166N,652 uses 16-DIP through-hole packaging. These require different PCB footprints and assembly methods. Electrical function is identical, but board-level integration differs.

Q: What is the temperature range difference between CD74HC166E and SN74HC166N?

A: CD74HC166E operates from -55°C ~ 125°C (extended range), while SN74HC166N operates from -40°C ~ 85°C (standard range). For applications requiring temperatures below -40°C or above 85°C, CD74HC166E is required.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (74HC166D,653, CD74HC166E, and SN74HC166N) are ROHS3 compliant, matching the compliance status of the original 74HC166N,652.

Q: Which substitute part has the best inventory availability?

A: 74HC166D,653 has 3183 units in stock, followed by SN74HC166N with 2350 units, and CD74HC166E with 2000 units.

Q: Can I use SN74HC166N as a direct replacement for 74HC166N,652?

A: Yes, for applications operating within -40°C ~ 85°C. Both use identical 16-DIP through-hole packaging and maintain the same electrical specifications (2V ~ 6V supply, 8-bit shift register function, push-pull output). SN74HC166N is an active product from Texas Instruments.