74HCT166D,652 Equivalent & Substitute Parts

Part Overview

The 74HCT166D,652 is an 8-bit parallel-in/serial-out shift register manufactured by Nexperia USA Inc. in a 16-SOIC surface mount package. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement. The shift register performs parallel or serial to serial conversion functions and operates within a 4.5V to 5.5V supply voltage range, making it suitable for standard logic applications requiring data serialization.

Substiute Parts

74HCT166D,652

Nexperia USA Inc.In Stock: 87074HCT166D,652 Datasheet

Current PartRFQ

74HCT166D,653

Nexperia USA Inc.In Stock: 321274HCT166D,653 Datasheet

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CD74HCT166M

Texas InstrumentsIn Stock: 1506CD74HCT166M Datasheet

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CD74HCT166M96

Texas InstrumentsIn Stock: 9435CD74HCT166M96 Datasheet

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CD74HCT166MT

Texas InstrumentsIn Stock: 878CD74HCT166MT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74HCT166D,652 is determined by the following critical parameters:

• Logic Type & Function: All substitute parts must be shift registers with parallel or serial to serial conversion capability
• Bit Configuration: 8-bit per element requirement must be maintained
• Output Type: Push-pull output configuration must be preserved
• Supply Voltage: 4.5V to 5.5V operating range is mandatory
• Package & Pinout: 16-SOIC surface mount package with identical pin configuration
• Compliance: ROHS3 compliance and EAR99 classification must be maintained

The substitute parts identified below meet all these electrical and mechanical criteria. Differences in product status, packaging format (tube, tape & reel, cut tape), and operating temperature ranges are noted but do not affect functional substitutability within the specified parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: CD74HCT166M96

The CD74HCT166M96 manufactured by Texas Instruments is the preferred substitute. This part is currently active in production, available in tape & reel packaging with 9358 units in stock, and meets all electrical and mechanical specifications. The extended operating temperature range (-55°C to 125°C) provides additional margin for demanding applications. ROHS3 compliance and EAR99 classification are maintained.

Secondary Recommendation: 74HCT166D,653

The 74HCT166D,653 from Nexperia USA Inc. is a direct variant of the original part, currently active with 3109 units in stock. This option maintains the same manufacturer lineage and is supplied in tape & reel format. Operating temperature range is identical to the original specification.

Alternative Options: CD74HCT166M and CD74HCT166MT

Both Texas Instruments parts provide functional equivalence with extended temperature ranges. CD74HCT166M is supplied in tube packaging, while CD74HCT166MT is available in cut tape & Digi-Reel format. Both are discontinued at DiGi Electronics but remain available through inventory channels.

All substitute parts maintain ROHS3 compliance and EAR99 classification, ensuring regulatory and environmental compliance consistency with the original design.

Frequently Asked Questions (FAQ)

Q: Can the 74HCT166D,653 be used as a direct replacement for the 74HCT166D,652?

A: Yes. Both parts are manufactured by Nexperia USA Inc., share identical electrical specifications, and use the same 16-SOIC package. The primary difference is packaging format (tube versus tape & reel) and product status (active versus obsolete). Functional substitution is complete.

Q: What is the difference between Nexperia and Texas Instruments versions?

A: Both manufacturers produce functionally equivalent 8-bit shift registers meeting the same electrical specifications and package requirements. Texas Instruments versions (CD74HCT166M, CD74HCT166M96, CD74HCT166MT) offer extended operating temperature range (-55°C to 125°C versus -40°C to 125°C). All versions maintain identical supply voltage, bit configuration, and output characteristics.

Q: Does packaging format affect electrical performance?

A: No. Tube, tape & reel, and cut tape packaging formats are logistics and handling variations only. Electrical performance and functional characteristics remain identical across all packaging options for the same part number base.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts maintain ROHS3 compliance and are classified as EAR99, ensuring consistency with environmental and export regulations.

Q: Which substitute part has the best availability?

A: CD74HCT166M96 has the highest inventory level at 9358 units in stock and maintains active production status, making it the most readily available option for procurement.

Q: Can I use a substitute part with a different operating temperature range?

A: Yes, if your application requirements permit. Texas Instruments versions operate from -55°C to 125°C, providing additional low-temperature margin compared to the original -40°C to 125°C specification. This extended range does not affect performance within the original temperature window.