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Atmel ATA5577M1330C-PP
Read/Write LF RFID IDIC Transponder 125KHz
DATASHEET
Features
Identification Transponder in Plastic Brick Package
Includes Ferrite Coil and Capacitor for Tuned Circuit Antenna
Basic Component: Atmel® ATA5577M1330C IDIC®
Contactless Power Supply
Contactless Downlink Data Transmission
Radio Frequency fRF = 125kHz
363-bit EEPROM Memory in Total: 11 Blocks × (32 Bits + 1 Lock-Bit)
7 × 32 Bits EEPROM User Memory Including 32-bit Password Memory
2 × 32 Bits Unique ID
1 × 32-bit Option Register in EEPROM to Set Up the Analog Front End:
Clock Detection Level
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Gap Detection Level
Improved Downlink Timing
Clamp Voltage
Modulation Voltage
Soft Modulation Switching
Write Damping like the Atmel T5557/ATA5567 or with Resistor
Downlink Protocol
1 x 32-bit Configuration Register in EEPROM to Set Up:
Data Rate:
RF/2 to RF/128, Binary Selectable or
Fixed Basic Mode Rates
Modulation/Coding:
ASK, FSK, PSK, Manchester, Bi-phase, NRZ
Other Options:
Password Mode
Max Block Feature
Direct Access Mode
Sequence Terminator(s)
Block-wise Write Protection (Lock Bit)
Answer-On-Request (AOR) Mode
Inverse Data Output
Disable Test Mode Access
Fast Downlink (~6Kbits/s vs. ~3Kbits/s)
OTP Functionality
Init Delay (~67ms)
9225B–RFID–04/12
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1. Description
The Atmel® ATA5577M1330C-PP is a contactless read/write identification transponder (IDIC®) for applications in the 125kHz
frequency band. It consists of a plastic brick which accommodates the read/write IDIC ATA5577M1330C. The antenna
comprises an LC circuit which serves as power supply and bi-directional communication interface.
The on-chip 363-bit EEPROM (11 blocks with 33 bits each) can be read and written block-wise from a base station (reader).
Two dedicated blocks are reserved for setting the IDIC operating modes. Another block may be used for a password to prevent
unauthorized writing.
Data is transmitted from the IDIC (uplink) using load modulation. This is achieved by damping the RF field with a resistive load.
The IC receives and decodes serial base station commands (downlink) which are encoded as 100% amplitude-modulated
(OOK) pulse-interval-encoded bit streams.
Figure 1-1. RFID System Using Atmel ATA5577M1-PP Transponder
Transponder ATA5577-PP
(ATA5577 + coil in plastic brick)
Reader
or
Base station
Power
Data
ATA5577
Coil
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Atmel ATA5577M1330C-PP [DATASHEET]
9225B–RFID–04/12
2
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2. General
The transponder consists of a plastic brick which accommodates the following components:
Atmel® ATA5577M1330C Read/Write IDIC®
Coil with Ferrite Core
Note:
The antenna is implemented as a tuned LC circuit
2.1 Transponder Antenna
The antenna consists of a coil and an on-chip capacitor of Atmel ATA5577M1330C for tuning the circuit to the nominal carrier
frequency of 125kHz. The coil has a ferrite core for improving the distance of read, write and programming operations.
2.2 Atmel ATA5577M1-PP Transponder Operation
The Atmel read/write IDIC ATA5577M1330C is part of the Atmel transponder ATA5577M1330C-PP. The data is transmitted bi-
directionally between the base station and the transponder. The transponder receives power via a single coil from the RF signal
generated by the base station. The single coil is connected to the chip and also serves as the IC’s bi-directional communication
interface.
Data is transmitted by modulating the amplitude of the RF signal. The register contents are read by damping the coil voltage
using an internal load. Writing into registers occurs by interrupting the RF field in a specific way. The Atmel ATA5577M1330C-
PP transponder operates at a nominal frequency of 125kHz. There are varying bit rates and encoding schemes. The on-chip
363-bit EEPROM (11 blocks with 33 bits each) can be read and written block-wise from a base station (reader). The blocks can
be protected against overwriting by using lock bits. Two blocks contain Atmel’s production information and form a unique ID
numbering system. Another block may contain a password to prevent unauthorized writing. Two blocks are reserved for setting
the IC's operating modes. See the Atmel ATA5577C datasheet for more detailed information about Atmel ATA5577M1330C
operating modes.
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Atmel ATA5577M1330C-PP [DATASHEET]
9225B–RFID–04/12
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3. Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this
specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Parameters
Symbol
Value
Unit
Operating temperature range
Tamb
–40 to +85
°C
Storage temperature range (data retention reduced)
Tamb
–40 to +125
°C
Maximum assembly temperature, t < 5min
Tass
170
°C
Magnetic field strength at f = 125kHz
Hpp 1000 A/m
4. Electrical Characteristics
No. Parameters
Test Conditions
Symbol Min.
Typ.
Max.
Unit
1 Inductance
L 4.8 4.9 5.0 mH
2.1
LC Circuit
2.2
Hpp = 14.5A/m
Hpp = 1.5A/m
fr
QLC
120 125 130 kHz
15 20 35
1
3
Max. field strength where tag
does not modulate
Quiet mode
Hpp not
-
2
- A/m
4 Min. field for modulation
Read mode
Hpp mod
-
14.5
-
A/m
5 Min. field for programming
Write mode
Hpp prog
-
29
- A/m
6 Maximum field strength
Hpp max
600 A/m
*) Type means: T: directly or indirectly tested during production; Q: guaranteed based on initial product qualification data
Type*
Q
T
T
Q
T
T
Q
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Atmel ATA5577M1330C-PP [DATASHEET]
9225B–RFID–04/12
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5. Measurement Assembly
All parameters are measured in a Helmholtz arrangement, which generates a homogenous magnetic field (see Figure 5-1 and
Figure 5-2). A function generator drives the field generating coils, so magnetic field frequency and strength can be varied.
Figure 5-1. Testing Application
SENSING COILS (IN PHASE)
ATA5577-PP
REFERENCE COIL
(IN PHASE)
SUBTRACTOR
REFERENCE COIL
(IN PHASE)
AMPLIFIER
1:10
OUTPUT
VOLTAGE
FIELD GENERATING
COILS (IN PHASE)
FUNCTION
GENERATOR
Figure 5-2. Testing Geometry
30mm
15mm
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24mm
ATA5577-PP
60mm
REFERENCE COIL
2mm
SENSING COIL
5 mm
FIELD GENERATING COIL
SENSING COIL
REFERENCE COIL
FIELD GENERATING COIL
Atmel ATA5577M1330C-PP [DATASHEET]
9225B–RFID–04/12
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