SN74HC166NSR Equivalent & Substitute Parts

Part Overview

The SN74HC166NSR is an 8-bit parallel load shift register manufactured by Texas Instruments, housed in a 16-SOIC surface mount package. This logic component functions as a parallel or serial to serial converter, featuring push-pull output configuration. The device is actively produced and widely used in digital logic applications requiring data shifting and parallel-to-serial conversion. Substitute parts are identified when equivalent electrical specifications and functional characteristics are maintained across different manufacturers while preserving package compatibility and operational parameters.

Substiute Parts

SN74HC166NSR

Texas InstrumentsIn Stock: 2138SN74HC166NSR Datasheet

Current PartRFQ

74HC166D,653

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74HC166NSR is determined by strict adherence to the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Logic Type: Shift Register (8-bit, single element)
• Function: Parallel or Serial to Serial conversion capability
• Output Type: Push-Pull configuration
• Supply Voltage Range: 2V ~ 6V (minimum overlap requirement)
• Package Type: 16-SOIC surface mount
• Base Product Number: 74HC166 series designation
• RoHS Compliance: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

The substitute part 74HC166D,653 manufactured by Nexperia USA Inc. meets all critical substitution criteria. Both parts share identical logic functionality, electrical supply specifications, and package classification. Variations in operating temperature range and package width dimensions do not preclude substitution when the application requirements fall within the overlapping operational envelope.

Parameter Comparison

Engineering Selection Recommendations

Both the SN74HC166NSR and 74HC166D,653 are active production components with ROHS3 compliance and identical moisture sensitivity ratings. Selection between these parts should be based on the following provided specifications:

Supply Voltage Compatibility: Both parts operate within the 2V ~ 6V range, ensuring functional equivalence in applications utilizing this voltage envelope.

Operating Temperature Range: The SN74HC166NSR operates from -40°C to 85°C, while the 74HC166D,653 extends to 125°C. Applications requiring operation above 85°C necessitate the Nexperia substitute.

Package Dimensions: The SN74HC166NSR features a 16-SOIC package with 5.30mm width, while the 74HC166D,653 measures 3.90mm width. PCB layout and footprint compatibility must be evaluated based on design specifications.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, suitable for regulated applications.

Frequently Asked Questions (FAQ)

Q: Can the 74HC166D,653 replace the SN74HC166NSR in all applications?

A: Functional and electrical compatibility is established across the specified supply voltage range and overlapping operating temperature envelope. Physical package dimensions differ; PCB footprint compatibility must be confirmed for your specific design.

Q: What is the primary difference between these two parts?

A: The primary differences are manufacturer (Texas Instruments versus Nexperia USA Inc.), operating temperature maximum (85°C versus 125°C), and 16-SOIC package width (5.30mm versus 3.90mm). All logic functions and electrical specifications remain equivalent.

Q: Are both parts suitable for high-temperature applications?

A: The SN74HC166NSR is rated to 85°C maximum operating temperature. For applications exceeding this threshold, the 74HC166D,653 with 125°C rating is required.

Q: Do package dimension differences affect electrical performance?

A: Package dimensions do not affect electrical performance. However, PCB layout and assembly compatibility must be evaluated based on your specific footprint design and manufacturing capabilities.

Q: Are both parts RoHS compliant?

A: Yes, both the SN74HC166NSR and 74HC166D,653 are ROHS3 compliant with identical moisture sensitivity levels, suitable for regulated manufacturing environments.