74HC147D,653 Priority Encoder Equivalent & Substitute Parts

Part Overview

The 74HC147D,653 is a priority encoder logic integrated circuit manufactured by NXP USA Inc., configured as a 1 x 10:4 priority encoder in a 16-SOIC surface mount package. This component is classified as obsolete, which necessitates identification of functionally equivalent substitute parts for ongoing design support and procurement continuity. The part operates across a 2V to 6V supply range with symmetric output currents of 5.2mA, making it suitable for standard TTL/CMOS logic applications requiring priority encoding functionality.

Substiute Parts

74HC147D,653

NXP USA Inc.In Stock: 113174HC147D,653 Datasheet

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CD74HC147M96

Texas InstrumentsIn Stock: 15406CD74HC147M96 Datasheet

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CD74HC147M

Harris CorporationIn Stock: 1219CD74HC147M Datasheet

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CD74HC147MT

Texas InstrumentsIn Stock: 1319CD74HC147MT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74HC147D,653 are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Electrical Compatibility Criteria:

• Circuit configuration: 1 x 10:4 priority encoder function
• Voltage supply range: 2V ~ 6V (minimum requirement)
• Output current specifications: 5.2mA high and low
• Logic family: 74HC series

Mechanical Compatibility Criteria:

• Package type: 16-SOIC (0.154", 3.90mm Width)
• Mounting type: Surface mount
• Pin count and arrangement: 16-pin SOIC

Compliance Criteria:

• RoHS3 compliance status
• Moisture sensitivity level: 1 (Unlimited)

All identified substitutes maintain identical circuit functionality, electrical performance within specified ranges, and physical package dimensions. Substitutes are differentiated by manufacturer, product status, and operating temperature range extensions.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: CD74HC147M96 (Texas Instruments)

The CD74HC147M96 is the recommended substitute for new designs and procurement. This part is currently active in production, maintains ROHS3 compliance, and extends the operating temperature range to -55°C ~ 125°C. The extended lower temperature specification provides additional design margin for industrial and automotive applications. Identical electrical performance and 16-SOIC package compatibility ensure direct functional replacement without circuit modification.

Secondary Substitutes: CD74HC147MT (Texas Instruments)

The CD74HC147MT offers equivalent electrical and mechanical specifications with ROHS3 compliance and extended temperature range. This part is discontinued at DiGi Electronics but may remain available through alternative distribution channels. Selection of this part should be evaluated based on current inventory availability and supply chain requirements.

Not Recommended: CD74HC147M (Harris Corporation)

The CD74HC147M does not meet current RoHS3 compliance requirements and is classified as obsolete. This part should not be selected for new designs or long-term production applications.

Frequently Asked Questions (FAQ)

Q: Can CD74HC147M96 be used as a direct replacement for 74HC147D,653 without circuit modifications?

A: Yes. Both parts share identical circuit configuration (1 x 10:4 priority encoder), electrical specifications (2V ~ 6V supply, 5.2mA output current), and 16-SOIC package dimensions. Pin-for-pin compatibility is maintained, allowing direct substitution on existing PCB layouts.

Q: What is the significance of the extended operating temperature range (-55°C vs -40°C)?

A: The CD74HC147M96 operates reliably at temperatures 15°C lower than the original 74HC147D,653. This extended range provides additional design margin for applications in cold environments or equipment with elevated internal operating temperatures. For applications constrained to -40°C ~ 125°C, both specifications are functionally equivalent.

Q: Why is RoHS3 compliance important for substitute selection?

A: RoHS3 compliance indicates the part meets current environmental and regulatory standards for hazardous substance restrictions. The CD74HC147M (Harris) does not meet this requirement and should not be selected for applications subject to RoHS compliance mandates or customer specifications requiring ROHS3 certification.

Q: Are there differences in moisture sensitivity between substitute parts?

A: The CD74HC147M96 and CD74HC147MT both specify Moisture Sensitivity Level 1 (Unlimited), matching the original 74HC147D,653. The CD74HC147M (Harris) does not provide MSL specification. MSL 1 indicates the part requires no special moisture control during storage or handling.

Q: What is the difference between CD74HC147M96 and CD74HC147MT packaging?

A: CD74HC147M96 is supplied in Cut Tape (CT) and Digi-Reel format, while CD74HC147MT is supplied in Cut Tape (CT) and Digi-Reel format. Both are surface mount 16-SOIC packages with identical physical dimensions and pin configurations. Packaging format selection depends on assembly process requirements and volume specifications.