Microchip Technology ATA5575M1250-DBB

Overview

ATA5575M1250-DBB from Microchip Technology (formerly Atmel) is a contactless read/write low-frequency RFID identification IC operating at 125 kHz, featuring 128-bit EEPROM user memory, Manchester-encoded uplink transmission at RF/64 data rate, on-chip 330 pF ±3% antenna capacitor, and gold-bumped die for direct coil bonding - deployed in access control transponders requiring secure, field-powered ID tags.

For engineers reviewing the ATA5575M1250-DBB datasheet, ATA5575M1250-DBB pinout, ATA5575M1250-DBB application, or ATA5575M1250-DBB equivalent, this page delivers verified technical context, real-world timing behavior, confirmed memory mapping, and validated alternative options for LF RFID system design and tag manufacturing.

Technical Context

The ATA5575M1250-DBB integrates an analog front end with rectifier, clock extractor, and field-gap detector to derive power and decode OOK-modulated downlink commands via pulse-interval encoding. Its HV generator enables byte-wise EEPROM programming using resistive load modulation between Coil 1 and Coil 2 terminals.

Memory architecture comprises 17 bytes (136 bits) of EEPROM: bytes 0–15 hold user data (64- or 128-bit UNIQUE format), byte 16 stores configuration including lock bits and ID length selection, and all data is transmitted via Manchester coding with fixed RF/64 bit rate - no external clock required.

Key Specifications

Pinout & Package

ATA5575M1250-DBB is supplied as a bare die on 6-inch wafer foil with ring mount and 25 µm gold bumps (package code DBB), thickness ≈150 µm. Die dimensions: 0.966 mm × 0.402 mm × 0.155 mm. Mega pads measure 200 µm × 400 µm with Au bumps for direct coil bonding.

Key Features

Applications

Equivalent & Alternatives

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

Compared with EM4102 and TKS4001, the ATA5575M1250-DBB uniquely combines on-chip 330 pF capacitor, Manchester RF/64 encoding, and factory-traceable UNIQUE format - reducing component count and simplifying coil design while maintaining reprogrammability and security lock bits.

Availability

ATA5575M1250-DBB is available at Aetrix Electronics and suitable for access control systems, asset tracking tags, vehicle immobilizer keys, and industrial equipment authentication requiring stable component supply and long-term lifecycle support.

Supply support for ATA5575M1250-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 acquired Atmel in 2016 and maintains full product support, qualification, and documentation for the ATA5575 family of LF RFID ICs.

The ATA5575 series was designed specifically for contactless, battery-free identification in 100–150 kHz systems - emphasizing high Q-tolerance, field-powered operation, and secure memory locking for physical access and asset security applications.

FAQ

What is the exact memory layout of the ATA5575M1250-DBB?

The ATA5575M1250-DBB contains 136-bit EEPROM organized as 17 bytes (0–16). Bytes 0–15 store user data (64- or 128-bit UNIQUE format), while byte 16 holds configuration data including lock bits and ID length. Factory delivery state pre-programs bytes 0–15 with lot/wafer/die-derived UID and sets byte 16 to 0x06 (UNIQUE format, 64-bit ID, memory reprogrammable).

Does the ATA5575M1250-DBB require an external capacitor for resonance?

No. The ATA5575M1250-DBB integrates a trimmed on-chip capacitor of 330 pF ±3%, eliminating the need for external tuning components. This simplifies coil design and improves production yield in transponder manufacturing - confirmed in Section 9.11.1 of the datasheet.

How does the lock bit mechanism work in the ATA5575M1250-DBB?

The ATA5575M1250-DBB uses bits 1–5 of EEPROM byte 16 as lock bits. Setting them to '01101b' permanently locks all memory (including byte 16), preventing further writes. In delivery state, lock bits are '00000b', allowing initial programming. All other combinations are undefined and may cause malfunction.

What data encoding and bit rate does the ATA5575M1250-DBB use for uplink communication?

The ATA5575M1250-DBB uses Manchester encoding for uplink (tag-to-reader) transmission at a fixed data rate of RF/64 - meaning one bit spans 64 field clock cycles. At 125 kHz, this yields a 1.953 kHz bit rate. This encoding is hardwired and not configurable per the datasheet Section 5.1.2.

What package form is the ATA5575M1250-DBB delivered in?

The ATA5575M1250-DBB is delivered as a bare die on 6-inch wafer foil with ring mount and 25 µm gold bumps (package code DBB), thickness ≈150 µm. It features 200 µm × 400 µm mega pads optimized for direct wire bonding or flip-chip coil attachment - detailed in Figure 11-2 of the datasheet.