TK5551M-PP RFID Tag Read/Write 125kHz Equivalent & Substitute Parts

Part Overview

The TK5551M-PP is a passive RFID tag designed for read/write applications operating at 125kHz frequency with 224 bytes of user-writable memory in an encapsulated form factor. This component is classified as obsolete product status, necessitating identification of active equivalent alternatives to ensure continued design support and procurement availability. The substitute part maintains functional equivalence across core electrical and mechanical parameters while offering improved product lifecycle status and compliance certifications.

Substiute Parts

TK5551M-PP

Microchip TechnologyIn Stock: 1165TK5551M-PP Datasheet

Current PartRFQ

ATA5551M-PPMY

Microchip TechnologyIn Stock: 23244ATA5551M-PPMY Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The ATA5551M-PPMY qualifies as a direct substitute for the TK5551M-PP based on strict equivalence across all critical electrical and mechanical parameters. The substitution logic is determined by the following matched parameters:

• Frequency: 125kHz (identical)
• Memory Type: Read/Write (identical)
• Writable Memory: 224b (User) (identical)
• Technology: Passive (identical)
• Style: Encapsulated (identical)
• Operating Temperature Range: -40°C ~ 85°C (identical)
• Size / Dimension: 0.492" L x 0.232" W (12.10mm x 5.90mm) (identical)
• Moisture Sensitivity Level: 1 (Unlimited) (identical)

Parameter Comparison

Engineering Selection Recommendations

The ATA5551M-PPMY is the direct functional equivalent for the obsolete TK5551M-PP. Selection of the ATA5551M-PPMY is supported by:

• Active product status ensuring long-term availability and manufacturing support
• ROHS3 compliance certification, providing regulatory alignment for new designs
• Identical electrical specifications across frequency, memory capacity, and operating temperature range
• Identical mechanical packaging and form factor
• Equivalent moisture sensitivity classification

The transition from TK5551M-PP to ATA5551M-PPMY requires no circuit redesign or application firmware modification due to parameter equivalence.

Frequently Asked Questions (FAQ)

Q: Can ATA5551M-PPMY be used as a direct replacement for TK5551M-PP in existing designs?

A: Yes. The ATA5551M-PPMY maintains identical electrical and mechanical specifications across all critical parameters including frequency, memory capacity, operating temperature range, and physical dimensions. No circuit modifications are required.

Q: What is the primary reason for substitution?

A: The TK5551M-PP is classified as obsolete product status. The ATA5551M-PPMY is an active product from the same manufacturer, ensuring continued procurement availability and manufacturing support.

Q: Are there compliance differences between these parts?

A: Yes. The ATA5551M-PPMY is ROHS3 compliant, while the TK5551M-PP is RoHS non-compliant. Both maintain REACH Unaffected status. New designs should utilize the ATA5551M-PPMY to meet current regulatory requirements.

Q: Is the physical package identical?

A: Yes. Both parts share identical encapsulated form factor dimensions of 0.492" L x 0.232" W (12.10mm x 5.90mm) and identical MSL classification of 1 (Unlimited).

Q: Are there inventory or lead time considerations?

A: The ATA5551M-PPMY maintains significantly higher inventory levels (23,200 pcs) compared to the obsolete TK5551M-PP (1,075 pcs), supporting improved procurement reliability.