74HC147DB,118 Priority Encoder Equivalent & Substitute Parts

Part Overview

The 74HC147DB,118 is a priority encoder logic integrated circuit manufactured by NXP USA Inc., featuring a 1 x 10:4 encoding configuration in a 16-SSOP surface mount package. This device is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The 74HC series priority encoder performs priority encoding functions across a single independent circuit with standardized electrical characteristics suitable for digital logic applications requiring voltage supplies between 2V and 6V.

Substiute Parts

74HC147DB,118

NXP USA Inc.In Stock: 82774HC147DB,118 Datasheet

Current PartRFQ

CD74HC147PW

Texas InstrumentsIn Stock: 1960CD74HC147PW Datasheet

MFR RecommendedRFQ

CD74HC147PWR

Texas InstrumentsIn Stock: 4275CD74HC147PWR Datasheet

MFR RecommendedRFQ

CD74HC147PWT

Texas InstrumentsIn Stock: 1777CD74HC147PWT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74HC147DB,118 are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Functional Equivalence Criteria:

• Identical circuit configuration: 1 x 10:4 priority encoder
• Matching output current specifications: 5.2mA high and low
• Identical voltage supply range: 2V ~ 6V
• Same logic series: 74HC

Mechanical Compatibility Criteria:

• Surface mount mounting type
• 16-pin package configuration
• Pin-compatible TSSOP or SSOP package variants

Compliance Requirements:

• ROHS3 compliance maintained
• Moisture sensitivity level 1 (unlimited)
• REACH unaffected status

The substitute parts CD74HC147PW, CD74HC147PWR, and CD74HC147PWT are manufactured by Texas Instruments and maintain functional equivalence through identical circuit topology and electrical specifications. Package variations between SSOP and TSSOP represent acceptable mechanical substitutes with equivalent pin spacing and surface mount characteristics.

Parameter Comparison

Engineering Selection Recommendations

CD74HC147PWR (Texas Instruments) - Primary Recommendation

The CD74HC147PWR is the preferred substitute for new designs and production applications. This part maintains active product status with Texas Instruments, ensuring long-term availability and supply chain stability. The extended operating temperature range of -55°C to 125°C provides additional margin beyond the original -40°C specification. Tape & Reel packaging format supports high-volume manufacturing processes. ROHS3 compliance and unlimited moisture sensitivity level maintain regulatory and environmental standards equivalent to the original part.

CD74HC147PW (Texas Instruments) - Secondary Option

The CD74HC147PW provides functional equivalence with tube packaging suitable for lower-volume applications or manual assembly processes. Last Time Buy status indicates limited future availability; this option is appropriate for legacy system maintenance or short-term production runs where existing inventory can be secured.

CD74HC147PWT (Texas Instruments) - Alternative for Tape & Reel Requirements

The CD74HC147PWT offers Tape & Reel packaging with Last Time Buy status. This part is suitable when CD74HC147PWR availability is constrained, though long-term supply cannot be guaranteed.

Package Consideration

All Texas Instruments substitutes use 16-TSSOP packaging (0.173", 4.40mm width) compared to the original 16-SSOP (0.209", 5.30mm width). Both packages are pin-compatible with identical pin assignments and electrical characteristics. PCB layout modifications may be required due to reduced package width; verify footprint compatibility with existing designs before implementation.

Frequently Asked Questions (FAQ)

Q: Are the Texas Instruments CD74HC147 variants pin-compatible with the NXP 74HC147DB,118?

A: Yes. All substitute parts maintain identical pin assignments and electrical characteristics. The functional circuit topology is equivalent across all variants. Package width differences (SSOP vs. TSSOP) do not affect electrical compatibility but may require PCB footprint verification.

Q: What is the difference between CD74HC147PW, CD74HC147PWR, and CD74HC147PWT?

A: These parts are electrically identical priority encoders with differences in packaging format and product status. CD74HC147PW uses tube packaging; CD74HC147PWR and CD74HC147PWT use Tape & Reel format. CD74HC147PWR maintains active product status, while CD74HC147PW and CD74HC147PWT are Last Time Buy. For new designs, CD74HC147PWR is recommended due to active status and supply continuity.

Q: Can I use these substitutes in applications requiring the original -40°C to 125°C temperature range?

A: Yes. All Texas Instruments substitutes support -55°C to 125°C operating temperature, which exceeds the original specification. Applications within the original -40°C to 125°C range operate within the substitute part specifications with additional margin.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. CD74HC147PW, CD74HC147PWR, and CD74HC147PWT are all ROHS3 compliant with moisture sensitivity level 1 (unlimited), matching the original part's compliance status.

Q: What packaging format should I select for high-volume production?

A: CD74HC147PWR in Tape & Reel format is optimized for high-volume automated assembly. This format provides active product status and ensures supply chain continuity for ongoing production requirements.

Q: Are there any electrical performance differences between the original and substitute parts?

A: No. Output current specifications (5.2mA high and low), voltage supply range (2V ~ 6V), and circuit configuration (1 x 10:4) are identical across all parts. The substitutes provide equivalent electrical performance.