T5577 / ATA5577C
Multi-protocol rewritable LF tag, emulates EM4100/HID
Full Specifications
| Manufacturer | Microchip |
|---|---|
| Frequency Category | LF 125 kHz |
| Frequency | 100 kHz to 150 kHz (LF RFID, typically 125 kHz or 134 kHz) |
| Protocol | Configurable for ISO/IEC 11784/785 compatibility, compatible with T5557/ATA5567, replacement for e5551/T5551 |
| Memory | 363 bits EEPROM (11 blocks × 33 bits: 7 blocks user memory + password, 2 blocks unique ID, 1 configuration block, 1 option block) |
| Interface | RF (contactless), dual coil terminals (Coil 1/Coil 2) for power supply and bidirectional communication |
| Temperature Range | -40°C to +85°C (operating ambient temperature) |
| Form Factor | Bare die (Type 1: 100 μm × 100 μm pads for wire bonding/flip chip; Type 2: 200 μm × 400 μm mega pads for direct coil bonding); also available as sawn wafer on foil, NOA3 micromodule, XDFN 1.5×2 mm package, transponder brick |
| Security | 32-bit password mode, blockwise write protection (lock bits), One-Time-Programmable (OTP) functionality, Answer-On-Request (AOR) mode for anti-collision |
Engineering Brief
The ATA5577C is a highly versatile contactless read/write LF RFID chip operating at 100–150 kHz (typically 125 or 134 kHz). It features 363 bits of EEPROM organized into 11 configurable blocks, supporting multiple modulation schemes (Manchester, Bi-phase, FSK, PSK, NRZ) and data rates (RF/2 to RF/128). With ISO 11784/11785 compatibility, password protection, OTP functionality, and programmable downlink protocols (fixed-length, long-leading-reference, leading-zero, 1-of-4 coding), it serves as a flexible drop-in replacement for T5557/ATA5567 and e5551/T5551 chips in access control, animal ID, and cloning applications. Delivered as bare die or in multiple packaged formats with on-chip trimmed capacitors (250/330 pF ±3%).
Typical Applications
- Animal identification (ISO 11784/11785 FDX-B)
- Access control systems
- Waste management tracking
- Clone/emulation of EM4100 and HID Prox cards
- General LF RFID tagging and tracking
- Rewritable transponder applications
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