SN74HC148DWR Equivalent & Substitute Parts

Part Overview

The SN74HC148DWR is a Priority Encoder integrated circuit with a 1 x 8:3 configuration in a 16-SOIC package. This component is classified as Obsolete, which necessitates identification of active equivalent parts for ongoing design and procurement requirements. The device functions as a priority encoder, converting an 8-line input to a 3-line binary output based on priority logic.

Substiute Parts

SN74HC148DWR

Texas InstrumentsIn Stock: 1111SN74HC148DWR Datasheet

Current PartRFQ

SN74HC148DR

Texas InstrumentsIn Stock: 2787SN74HC148DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74HC148DWR is based on the following critical parameters that must remain constant:

• Circuit configuration: 1 x 8:3 priority encoder function
• Voltage supply range: 2V ~ 6V
• Output current specifications: 5.2mA high and low
• Operating temperature range: -40°C ~ 85°C
• Package type: 16-SOIC surface mount
• Manufacturer: Texas Instruments 74HC series
• Compliance: ROHS3, REACH Unaffected

The SN74HC148DR qualifies as a direct substitute because it maintains identical electrical specifications, functional configuration, and compliance certifications while offering Active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

The SN74HC148DR is the recommended substitute for the obsolete SN74HC148DWR. Both parts maintain identical electrical performance, functional specifications, and regulatory compliance. The primary distinction is product status: the SN74HC148DR is Active and maintains higher inventory availability. Both components satisfy ROHS3 and REACH compliance requirements, ensuring regulatory alignment for current manufacturing standards.

Frequently Asked Questions (FAQ)

Q: Can the SN74HC148DR directly replace the SN74HC148DWR in existing designs?

A: Yes. The SN74HC148DR provides electrical and functional equivalence across all specified parameters, including voltage supply range, output current, operating temperature, and circuit configuration. Both components are housed in 16-SOIC surface mount packages compatible with standard PCB layouts.

Q: What is the difference between the two 16-SOIC package dimensions listed?

A: The SN74HC148DWR specifies a package width of 0.295" (7.50mm), while the SN74HC148DR specifies 0.154" (3.90mm). Both are classified as 16-SOIC packages and are mechanically compatible with standard 16-SOIC footprints used in PCB design.

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

A: No. Both the SN74HC148DWR and SN74HC148DR maintain identical RoHS3 compliance, REACH Unaffected status, and Moisture Sensitivity Level 1 (Unlimited) ratings.

Q: Why is the SN74HC148DR preferred over the SN74HC148DWR?

A: The SN74HC148DR holds Active product status with significantly higher inventory availability (2714 units versus 1007 units), ensuring reliable procurement for current and future production requirements. The electrical and functional specifications remain identical.