Microchip Technology ATA5577M1330C-PP

Overview

ATA5577M1330C-PP from Microchip Technology (formerly Atmel) is a contactless 125 kHz read/write RFID transponder IC embedded in a plastic brick package with integrated ferrite-core coil. It features 363-bit EEPROM (11 × 33-bit blocks), Manchester/FSK/ASK/PSK/NRZ/bi-phase modulation support, RF/2–RF/128 programmable data rate, and password-protected write access. It powers and communicates via load modulation in proximity RFID systems such as access control tokens and asset tags.

For engineers reviewing the ATA5577M1330C-PP datasheet, ATA5577M1330C-PP pinout, ATA5577M1330C-PP application, or ATA5577M1330C-PP equivalent, key selection criteria include 125 kHz carrier compatibility, block-wise EEPROM write protection, downlink protocol flexibility (e.g., Manchester at RF/32 default), and field strength thresholds for reliable read (≥14.5 A/m) and write (≥29 A/m) operation.

Technical Context

The ATA5577M1330C-PP integrates an analog front-end tuned to 125 kHz using on-chip capacitance and an external ferrite-core inductor (4.5 mH). Its bi-directional communication relies on amplitude-shift keying (ASK) downlink decoding and load-modulation uplink transmission.

Configuration is stored in two dedicated EEPROM blocks: Block 0 (32-bit config register) sets data rate and modulation mode; Block 3 (32-bit AFE option register) controls clamp voltage, soft modulation switching, and modulation level-pre-programmed to 0x00088040 (RF/32, Manchester) and 0x6DC00000 (soft modulation 2 pulses, clamp high) at delivery.

Key Specifications

Pinout & Package

ATA5577M1330C-PP is a monolithic transponder IC housed in a molded plastic brick (11.9 × 4.9 × 4.2 mm) with integrated ferrite-core coil. The device has no external pins; coil terminals connect internally to the IC's RF interface (ANT1/ANT2). No discrete pinout applies-the antenna coil forms the sole electrical interface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with EM4102 and T5557, the ATA5577M1330C-PP provides superior configurability (AFE register, password, fast downlink), higher EEPROM capacity (363 vs. 330 or 64 bits), and tighter field sensitivity-making it optimal for secure, updatable, and reader-interoperable LF RFID deployments.

Availability

ATA5577M1330C-PP is available at Aetrix Electronics and suitable for access control systems, industrial asset tracking, animal identification, and library management applications requiring stable component supply and long-term lifecycle support.

Supply support for ATA5577M1330C-PP 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 acquired Atmel in 2016 and maintains its RFID product portfolio, including IDIC® transponders. The company specializes in secure microcontrollers, analog, and wireless solutions for industrial and embedded markets.

The ATA5577M1330C-PP belongs to Atmel's IDIC® (Identification Integrated Circuit) family, designed specifically for contactless, battery-free 125 kHz RFID applications requiring field-powered operation, secure memory, and multi-protocol downlink compatibility.

FAQ

What is the nominal operating frequency and resonance tolerance of the ATA5577M1330C-PP?

The ATA5577M1330C-PP operates at a nominal frequency of 125 kHz, with a specified resonance range of 120–130 kHz. This tolerance ensures robust interoperability with commercial 125 kHz RFID readers and accommodates manufacturing variance in the integrated ferrite-core coil and on-chip capacitor. The device achieves this via LC tank tuning, where the external 4.5 mH inductor combines with internal capacitance to set the resonant point.

How is EEPROM organized and protected on the ATA5577M1330C-PP?

The ATA5577M1330C-PP contains 363 bits of EEPROM arranged in 11 blocks of 33 bits each (32 data + 1 lock bit). Seven blocks serve user memory (including a dedicated 32-bit password block), two hold unique IDs, and one each holds the configuration and AFE option registers. Each block's lock bit, once set, permanently disables further writes to that block-enabling secure, granular memory protection without affecting other sections.

What modulation schemes and data rates does the ATA5577M1330C-PP support?

The ATA5577M1330C-PP supports ASK, FSK, PSK, Manchester, bi-phase, and NRZ downlink modulation. Data rates are programmable from RF/2 to RF/128 in binary steps; the default delivery configuration uses RF/32 with Manchester encoding, yielding ~3.9 kbps. These settings are stored in Block 0 (config register) and can be updated in-system via valid reader commands and password authentication.

Does the ATA5577M1330C-PP require an external power source or PCB layout?

No-the ATA5577M1330C-PP is a fully passive, contactless transponder. It derives all operating power from the reader's 125 kHz magnetic field via its integrated ferrite-core coil. As a pre-assembled plastic brick (11.9 × 4.9 × 4.2 mm), it requires no PCB mounting, soldering, or external components-only mechanical integration into a tag or card substrate.

What are the minimum and maximum magnetic field strengths required for reliable operation of the ATA5577M1330C-PP?

The ATA5577M1330C-PP requires a minimum field strength of 14.5 A/m for read mode and 29 A/m for programming (write) mode. Its absolute maximum rated field is 600 A/m. These values are measured at 125 kHz and define the operational envelope for compatible readers-ensuring reliable modulation under typical antenna geometries while preventing damage or unintended behavior at excessive field levels.