CD74HC147PWT Priority Encoder Equivalent & Substitute Parts

Part Overview

The CD74HC147PWT is a priority encoder logic integrated circuit manufactured by Texas Instruments, configured as a 1 x 10:4 priority encoder in a 16-TSSOP surface mount package. This device encodes ten input lines into a 4-bit binary output, prioritizing the highest active input line. The CD74HC147PWT is designated as Last Time Buy, indicating discontinued production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications currently utilizing this component.

Substiute Parts

CD74HC147PWT

Texas InstrumentsIn Stock: 1777CD74HC147PWT Datasheet

Current PartRFQ

CD74HC147PWR

Texas InstrumentsIn Stock: 4275CD74HC147PWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD74HC147PWT is determined by strict equivalence across the following critical parameters:

• Circuit configuration (1 x 10:4 priority encoder function)
• Package type and physical dimensions (16-TSSOP surface mount)
• Electrical specifications (voltage supply range 2V ~ 6V, output current 5.2mA)
• Operating temperature range (-55°C ~ 125°C)
• Compliance certifications (ROHS3, REACH Unaffected)

The CD74HC147PWR qualifies as a parametric equivalent based on identical values across all these parameters. Both parts share the same base product number (74HC147) and maintain functional and electrical interchangeability within the specified operating conditions.

Parameter Comparison

Engineering Selection Recommendations

The CD74HC147PWR is the direct parametric equivalent for the CD74HC147PWT. Both parts maintain identical electrical and mechanical specifications, ensuring pin-for-pin and functional compatibility. The primary distinction is product status: the CD74HC147PWT is Last Time Buy (discontinued), while the CD74HC147PWR is Active (currently in production).

For new designs or ongoing production requiring the 74HC147 priority encoder function, the CD74HC147PWR is the appropriate selection. This part carries ROHS3 compliance and REACH Unaffected status, meeting current regulatory requirements. The Active product status ensures long-term availability and supply chain continuity compared to the Last Time Buy designation of the original part.

Frequently Asked Questions (FAQ)

Q: Can the CD74HC147PWR be used as a direct replacement for the CD74HC147PWT?

A: Yes. Both parts are identical in circuit configuration, electrical specifications, package type, and operating parameters. The CD74HC147PWR is a direct pin-for-pin and functional substitute.

Q: What is the difference between CD74HC147PWT and CD74HC147PWR?

A: The parts are electrically and mechanically identical. The difference is product status: CD74HC147PWT is Last Time Buy (production discontinued), while CD74HC147PWR is Active (currently manufactured). Both use the same 16-TSSOP package and share the 74HC147 base product number.

Q: Why is the CD74HC147PWT marked as Last Time Buy?

A: Last Time Buy designation indicates that Texas Instruments has discontinued production of this specific part number variant. The CD74HC147PWR remains in active production as the current equivalent offering.

Q: Are there any package or pinout differences between these parts?

A: No. Both parts use the 16-TSSOP (0.173", 4.40mm Width) surface mount package with identical pinout and physical dimensions.

Q: What are the compliance certifications for the substitute part?

A: The CD74HC147PWR is ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory standards.

Q: Can these parts operate in the same temperature range?

A: Yes. Both the CD74HC147PWT and CD74HC147PWR operate across the identical temperature range of -55°C to 125°C.