Microchip Technology ATA5577M3330C-DBB

Overview

ATA5577M3330C-DBB from Microchip Technology is a contactless read/write LF RFID identification IC operating at 125 kHz, featuring 363-bit EEPROM (11 × 33-bit blocks), load modulation uplink, and OOK/PIE downlink decoding. It serves as the core transponder IC in passive RFID tags for access control and animal identification systems, with on-chip AFE, HV generator, and configurable data rate from RF/2 to RF/128.

For engineers reviewing the ATA5577M3330C-DBB datasheet, ATA5577M3330C-DBB pinout, ATA5577M3330C-DBB application, or ATA5577M3330C-DBB equivalent, key selection criteria include ISO/IEC 11784/785 configurability, password-protected write access, soft modulation switching for high-Q antenna compatibility, and OTP functionality in Extended mode.

Technical Context

The ATA5577M3330C-DBB implements a fully integrated analog front end with rectifier, clock extractor, field gap detector, and switchable resistive load between Coil 1 and Coil 2 for uplink modulation. Its controller executes blockwise EEPROM read/write, loads Mode and Option registers from EEPROM after POR, and validates downlink commands using pulse interval encoding (PIE).

It supports two operational modes: Basic mode with fixed data rates (RF/8 to RF/128) and Extended mode enabling binary-programmable data rates, inverse data output, fast downlink (~6 kbps), and OTP lock. Configuration is stored in EEPROM Block 0 (Mode register) and Block 3 of Page 1 (AFE Option register), both shadowed in dedicated on-chip registers.

Key Specifications

Pinout & Package

ATA5577M3330C-DBB is packaged in a die form optimized for direct coil bonding (Pad Type 2), with 200 μm × 400 μm bond pads. It interfaces exclusively through two terminals: Coil 1 and Coil 2.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LF RFID transponder applications.

Compared with T5557 and ATA5567, the ATA5577M3330C-DBB delivers enhanced field robustness via soft modulation switching, deterministic initialization timing, and production-programmed traceability data - making it the preferred choice for certified animal ID and secure access systems.

Availability

ATA5577M3330C-DBB is available at Aetrix Electronics and suitable for access control systems, animal identification tags, waste management bin tagging, and industrial asset tracking requiring stable component supply and long-term lifecycle support.

Supply support for ATA5577M3330C-DBB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and secure identification solutions.

The ATA5577 family is designed as a next-generation LF RFID transponder IC platform, targeting high-reliability, standards-compliant identification in animal ID, access control, and industrial tagging applications.

FAQ

What is the primary function of the ATA5577M3330C-DBB in an RFID system?

The ATA5577M3330C-DBB functions as a contactless, battery-free read/write identification IC that forms the core of passive LF RFID transponders. It harvests power from a 125 kHz RF field, stores 363 bits of data in EEPROM, and communicates bidirectionally using load modulation (uplink) and OOK/PIE decoding (downlink). In every deployed tag, the ATA5577M3330C-DBB handles power conversion, memory management, protocol execution, and modulation control without external active components.

Does the ATA5577M3330C-DBB support ISO/IEC 11784 and 11785 standards?

Yes, the ATA5577M3330C-DBB supports ISO/IEC 11784/785 compliance through configurable bits in its EEPROM Option register. When programmed accordingly, it formats transmitted data-including the preprogrammed 64-bit unique ID (with ACL = E0h and MFC = 15h)-to meet the structure and timing requirements of these animal identification standards. This configurability is verified in the official Microchip DS70005357B datasheet and does not require external logic or firmware.

How is memory organized and protected in the ATA5577M3330C-DBB?

The ATA5577M3330C-DBB contains 363 bits of EEPROM arranged in 11 blocks of 33 bits each (32 data + 1 lock bit). Blocks are written atomically; once a lock bit is set, that entire block becomes permanently read-only. User memory occupies Blocks 1–7 (224 bits), unique ID resides in Blocks 1–2 of Page 1 (64 bits), and configuration resides in Block 0 (Page 0) and Block 3 (Page 1). The ATA5577M3330C-DBB enforces protection at the hardware level-no unlock command exists once locked.

What distinguishes Basic mode from Extended mode in the ATA5577M3330C-DBB?

Basic mode offers fixed data rates (RF/8 to RF/128) and standard modulation schemes (Manchester, FSK, PSK), while Extended mode enables binary-programmable data rates (RF/2 to RF/128), inverse data output, fast downlink (~6 kbps), OTP locking, and sequence terminator support. Activation requires setting master key bits 1–4 in Block 0 to 6 (Extended mode only) or 9 (Extended + Test mode). The ATA5577M3330C-DBB defaults to Basic mode unless explicitly configured otherwise in EEPROM.

Can the ATA5577M3330C-DBB be used with high-Q antennas without signal distortion?

Yes, the ATA5577M3330C-DBB includes soft modulation switching and adjustable AFE threshold settings (via Option register) specifically to maintain reliable operation with high-Q antennas. These features mitigate clock loss during modulation transitions and allow fine-tuning of gap detection sensitivity-critical for stable downlink reception in resonant coil systems. This capability is documented in Sections 4.2 and 3.2 of the DS70005357B datasheet and confirmed in Microchip application notes for LF RFID design.