CD74HC147PW Priority Encoder - Equivalent & Substitute Parts

Part Overview

The CD74HC147PW is a 10-line to 4-line priority encoder manufactured by Texas Instruments, housed in a 16-TSSOP surface mount package. This logic IC converts a 10-bit input into a 4-bit binary output, prioritizing the highest active input line. The device operates across a 2V to 6V supply range with symmetric output current characteristics of 5.2mA for both high and low states.

The CD74HC147PW carries a Last Time Buy status, indicating discontinued production. Identifying equivalent substitute parts is essential for ongoing design support, production continuity, and long-term component availability.

Substiute Parts

CD74HC147PW

Texas InstrumentsIn Stock: 1960CD74HC147PW Datasheet

Current PartRFQ

CD74HC147PWR

Texas InstrumentsIn Stock: 4275CD74HC147PWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HC147PW is determined by strict equivalence across the following critical parameters:

• Functional Type: Priority Encoder with identical 10:4 circuit configuration
• Electrical Specifications: Output current (5.2mA symmetric), supply voltage range (2V ~ 6V), and operating temperature range (-55°C ~ 125°C)
• Package Compatibility: 16-TSSOP surface mount package with identical physical dimensions (0.173" width, 4.40mm)
• Compliance Standards: ROHS3 compliance, MSL 1 rating, and REACH unaffected status

The substitute part CD74HC147PWR meets all substitution criteria. The primary distinction is packaging format: the main part uses Tube packaging, while the substitute uses Tape & Reel (TR) format. Both parts share identical electrical performance and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The CD74HC147PWR is a direct functional and electrical equivalent to the CD74HC147PW. Both parts are manufactured by Texas Instruments and share identical electrical performance specifications, package geometry, and compliance certifications.

The primary selection consideration is product status and availability. The CD74HC147PW is designated Last Time Buy, indicating end-of-life status. The CD74HC147PWR maintains Active product status with higher current inventory (4189 Pcs vs. 1863 Pcs), providing superior long-term availability and supply chain reliability.

Packaging format differs between the two parts: CD74HC147PW uses Tube packaging suitable for manual handling and small-quantity applications, while CD74HC147PWR uses Tape & Reel format optimized for automated assembly processes. This distinction affects procurement logistics and production workflow but does not impact electrical or mechanical compatibility.

For new designs or production continuity, CD74HC147PWR is the preferred selection due to active product status and established supply chain support.

Frequently Asked Questions (FAQ)

Q: Can CD74HC147PWR be used as a direct replacement for CD74HC147PW in existing designs?

A: Yes. Both parts are electrically and mechanically identical. The 16-TSSOP package dimensions, pin configuration, electrical specifications, and operating ranges are equivalent. No circuit modifications are required.

Q: What is the difference between Tube and Tape & Reel packaging?

A: Tube packaging contains individual components in a plastic tube, suitable for manual handling and small-quantity orders. Tape & Reel packaging places components on a continuous carrier tape wound on a reel, optimized for automated pick-and-place assembly equipment. Both formats contain identical components with no electrical differences.

Q: Why is CD74HC147PW marked as Last Time Buy?

A: Last Time Buy status indicates the manufacturer has discontinued production. Existing inventory is available for a limited period, after which the part becomes unavailable. CD74HC147PWR, with Active status, represents the ongoing production equivalent.

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

A: No. Both parts carry identical ROHS3 compliance, MSL 1 rating, REACH unaffected status, and ECCN/HTSUS classifications. Compliance certifications are equivalent.

Q: What is the MSL 1 rating, and does it affect storage or handling?

A: MSL 1 (Moisture Sensitivity Level 1) indicates unlimited shelf life with no special moisture control requirements during storage or handling. Both parts can be stored under standard industrial conditions without desiccant packaging or controlled humidity environments.

Q: Can these parts be used interchangeably in automated assembly processes?

A: CD74HC147PWR in Tape & Reel format is optimized for automated assembly. CD74HC147PW in Tube format requires manual component feeding. For high-volume automated production, CD74HC147PWR is the appropriate selection. For manual or low-volume assembly, either format is acceptable.