SN74HC148D Equivalent & Substitute Parts

Part Overview

The SN74HC148D is a priority encoder integrated circuit manufactured by Texas Instruments, designed for 1 x 8:3 encoding applications in 16-SOIC surface mount packaging. This component is classified as discontinued at DiGi Electronics, which necessitates identification of functionally equivalent alternatives for ongoing design requirements and production needs. The part operates across a single supply voltage range of 2V to 6V with an operating temperature range of -40°C to 85°C, making it suitable for standard industrial and commercial applications.

Substiute Parts

SN74HC148D

Texas InstrumentsIn Stock: 2095SN74HC148D Datasheet

Current PartRFQ

SN74HC148DR

Texas InstrumentsIn Stock: 2787SN74HC148DR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74HC148D is determined by strict equivalence across the following critical parameters:

• Functional type: Priority Encoder with identical 1 x 8:3 circuit configuration
• Electrical specifications: Matching voltage supply range (2V ~ 6V), output current ratings (5.2mA high and low), and operating temperature range (-40°C ~ 85°C)
• Package compatibility: Identical 16-SOIC surface mount package with 0.154" width (3.90mm)
• Compliance standards: ROHS3 compliance, MSL Level 1, and REACH unaffected status
• Base product series: 74HC family designation

The SN74HC148DR qualifies as a direct substitute based on complete alignment with all specified electrical and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

The SN74HC148DR is the appropriate substitute for the discontinued SN74HC148D. Both components maintain identical electrical specifications, package geometry, and compliance certifications. The SN74HC148DR carries active product status with confirmed inventory availability (2714 Pcs), ensuring supply chain continuity. The transition from tube packaging (SN74HC148D) to cut tape and Digi-Reel packaging (SN74HC148DR) does not affect functional performance or circuit compatibility. ROHS3 compliance and MSL Level 1 rating are maintained across both variants, supporting equivalent reliability and handling requirements.

Frequently Asked Questions (FAQ)

Q: Can the SN74HC148DR directly replace the SN74HC148D in existing designs?

A: Yes. Both parts share identical electrical specifications, package dimensions, and pin configurations. No circuit modifications are required for substitution.

Q: What is the difference between tube and cut tape packaging?

A: Tube packaging (SN74HC148D) and cut tape with Digi-Reel packaging (SN74HC148DR) represent different distribution formats. Both contain the same component with identical performance characteristics. Selection depends on assembly process requirements and order quantities.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both the SN74HC148D and SN74HC148DR maintain ROHS3 compliance, MSL Level 1 rating, and REACH unaffected status. Regulatory and environmental requirements are equivalent.

Q: What are the critical parameters for substitution in the 74HC148 family?

A: Substitution requires matching the 1 x 8:3 priority encoder configuration, 16-SOIC package, 2V to 6V supply voltage range, 5.2mA output current specifications, and -40°C to 85°C operating temperature range.

Q: Is the SN74HC148DR currently available?

A: Yes. The SN74HC148DR maintains active product status with 2714 pieces in stock, providing reliable supply availability compared to the discontinued SN74HC148D.