CD74HC4511PWT Equivalent & Substitute Parts

Part Overview

The CD74HC4511PWT is a 7-segment LED driver IC manufactured by Texas Instruments, designed to convert BCD (Binary Coded Decimal) input signals into decoded outputs for driving single-digit LED displays. This device operates across a wide supply voltage range of 2V to 6V with minimal supply current of 8 µA, making it suitable for battery-powered and low-power applications.

The CD74HC4511PWT is classified as Last Time Buy, indicating that Texas Instruments has discontinued this part number. Identifying equivalent substitute parts is necessary to ensure continued design support, maintain supply chain reliability, and facilitate procurement for new production runs or design revisions.

Substiute Parts

CD74HC4511PWT

Texas InstrumentsIn Stock: 1497CD74HC4511PWT Datasheet

Current PartRFQ

CD74HC4511PWR

Texas InstrumentsIn Stock: 3292CD74HC4511PWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD74HC4511PWT is determined by strict equivalence across the following critical parameters:

• Base Product Number: 74HC4511
• Package / Case: 16-TSSOP (0.173", 4.40mm Width)
• Electrical Specifications: Voltage supply range (2V ~ 6V), supply current (8 µA), operating temperature range (-55°C ~ 125°C)
• Functional Configuration: BCD interface, 7-segment LED driver, single-digit output
• Compliance Standards: ROHS3 Compliant, REACH Unaffected, MSL Level 1

The primary distinction between the main part and its substitute lies in packaging format. The CD74HC4511PWT is supplied in Tape & Reel (TR) format, while the substitute part CD74HC4511PWR is available in Cut Tape (CT) & Digi-Reel® format. Both parts share identical electrical characteristics, pinout configuration, and performance specifications, making them functionally interchangeable at the component level.

Parameter Comparison

Engineering Selection Recommendations

The CD74HC4511PWR is the direct functional equivalent of the CD74HC4511PWT. Selection between these parts should be based on procurement requirements and supply chain considerations:

The CD74HC4511PWT carries Last Time Buy status, indicating limited availability and no future production from Texas Instruments. The CD74HC4511PWR maintains Active product status with higher inventory availability (3200 Pcs vs. 1461 Pcs), ensuring sustained supply for ongoing production and future design iterations.

Both parts maintain identical ROHS3 compliance and REACH Unaffected status, satisfying equivalent regulatory and environmental requirements. The MSL Level 1 rating for both parts eliminates moisture-related handling constraints during assembly and storage.

For new designs or production runs requiring sustained component availability, the CD74HC4511PWR is the appropriate selection. For existing designs currently specified with the CD74HC4511PWT, transition to the CD74HC4511PWR presents no electrical or functional risk, as all critical parameters remain unchanged.

Frequently Asked Questions (FAQ)

Q: Are the CD74HC4511PWT and CD74HC4511PWR electrically identical?

A: Yes. Both parts share the same base product number (74HC4511), electrical specifications, pinout configuration, and performance characteristics. They are functionally interchangeable at the component level.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® packaging?

A: Tape & Reel is a continuous reel format for high-volume automated assembly. Cut Tape & Digi-Reel® provides flexibility for lower-volume orders and mixed-component procurement. Both formats contain identical components in the same 16-TSSOP package.

Q: Why is the CD74HC4511PWT marked as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued this part number and will not produce additional units beyond existing inventory. The CD74HC4511PWR remains in active production as the current equivalent offering.

Q: Can I use the CD74HC4511PWR as a direct replacement in existing designs?

A: Yes. The CD74HC4511PWR is a direct substitute with no design modifications required. PCB layout, schematic connections, and firmware remain unchanged.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the CD74HC4511PWT and CD74HC4511PWR are ROHS3 Compliant, REACH Unaffected, and carry MSL Level 1 rating, satisfying identical regulatory and environmental requirements.

Q: Which part should I specify for new designs?

A: Specify the CD74HC4511PWR for new designs. It maintains Active product status with sustained availability and identical electrical performance to the discontinued CD74HC4511PWT.