74HC166D,652 Equivalent & Substitute Parts

Part Overview

The 74HC166D,652 is an 8-bit parallel-load shift register manufactured by Nexperia USA Inc., designed for serial-to-parallel and parallel-to-serial data conversion in digital logic applications. This component operates across a 2V to 6V supply range with push-pull output configuration and is housed in a 16-SOIC surface-mount package.

The 74HC166D,652 is classified as obsolete, making equivalent substitute parts necessary for ongoing production, maintenance, and new design implementations. Substitute components must maintain functional equivalence while meeting current availability and compliance requirements.

Substiute Parts

74HC166D,652

Nexperia USA Inc.In Stock: 72774HC166D,652 Datasheet

Current PartRFQ

CD74HC166M

Texas InstrumentsIn Stock: 1579CD74HC166M Datasheet

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CD74HC166M96

Texas InstrumentsIn Stock: 2467CD74HC166M96 Datasheet

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SN74HC166AIDREP

Texas InstrumentsIn Stock: 1032SN74HC166AIDREP Datasheet

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SN74HC166AIDRQ1

Texas InstrumentsIn Stock: 806SN74HC166AIDRQ1 Datasheet

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SN74HC166D

Texas InstrumentsIn Stock: 2809SN74HC166D Datasheet

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SN74HC166DR

Texas InstrumentsIn Stock: 2575SN74HC166DR Datasheet

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SN74HC166DRG4

Texas InstrumentsIn Stock: 2894SN74HC166DRG4 Datasheet

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SN74HC166NSR

Texas InstrumentsIn Stock: 2138SN74HC166NSR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74HC166D,652 is determined by strict adherence to the following parameters:

Core Functional Parameters:

• Logic Type: Shift Register
• Number of Elements: 1
• Number of Bits per Element: 8
• Function: Parallel or Serial to Serial
• Output Type: Push-Pull

Electrical Parameters:

• Voltage - Supply: 2V ~ 6V
• Operating Temperature Range: Must encompass or exceed -40°C ~ 125°C

Physical Parameters:

• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

All substitute parts listed maintain these core parameters. Variations in product status, packaging format (Tube, Tape & Reel, Cut Tape), and manufacturer do not affect functional substitutability when electrical and mechanical specifications align.

Parameter Comparison

Engineering Selection Recommendations

For Active Product Status: CD74HC166M96, SN74HC166AIDREP, SN74HC166AIDRQ1, and SN74HC166DR are currently active components available from manufacturers. These parts provide the most reliable long-term supply chain continuity for new designs and production requirements.

For Extended Temperature Range: CD74HC166M and CD74HC166M96 support operating temperatures from -55°C to 125°C, exceeding the original 74HC166D,652 specification of -40°C to 125°C. These variants are suitable for applications requiring enhanced low-temperature performance.

For Automotive Applications: SN74HC166AIDRQ1 carries AEC-Q100 automotive qualification, meeting automotive-grade reliability standards. This variant is appropriate for automotive and mission-critical applications.

For Standard Industrial Applications: SN74HC166DR and SN74HC166AIDREP provide active status with standard industrial temperature ranges (-40°C to 85°C), suitable for general-purpose logic applications.

Package Consideration: SN74HC166NSR features a 16-SOIC package with 5.30mm width, differing from the standard 3.90mm width of other variants. This part is not recommended as a direct substitute due to physical package incompatibility with existing PCB layouts designed for the 74HC166D,652.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts as a direct replacement for the 74HC166D,652?

A: Yes, all listed substitutes except SN74HC166NSR are direct replacements. They maintain identical functional specifications, electrical parameters, and 16-SOIC (0.154", 3.90mm Width) package dimensions. SN74HC166NSR uses a different package width (5.30mm) and is not suitable for existing PCB layouts.

Q: What is the difference between the various Texas Instruments part numbers?

A: Differences exist in product status, packaging format, and operating temperature range. CD74HC166M96 is active with extended temperature range (-55°C to 125°C). SN74HC166AIDRQ1 includes automotive qualification (AEC-Q100). SN74HC166DR and SN74HC166AIDREP are active standard variants. SN74HC166D and SN74HC166DRG4 are discontinued at DiGi Electronics. Packaging formats include Tube, Tape & Reel (TR), and Cut Tape (CT) & Digi-Reel®.

Q: Does operating temperature range affect substitutability?

A: Operating temperature range does not prevent substitution. The original 74HC166D,652 operates from -40°C to 125°C. Substitutes with narrower ranges (-40°C to 85°C) are suitable for applications within that range. Substitutes with extended ranges (-55°C to 125°C) provide additional capability without compromising compatibility.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original 74HC166D,652 compliance profile.

Q: Which substitute should I select for new production?

A: CD74HC166M96 or SN74HC166DR are recommended for new production due to active product status and established supply availability. CD74HC166M96 offers extended temperature range capability. SN74HC166AIDRQ1 is recommended for automotive applications requiring AEC-Q100 qualification.