T5557 IC Datasheet

T5557 Datasheet, PDF, Equivalent


Part Number

T5557

Description

Multifunctional 330-bit Read/Write RF-Identification IC

Manufacture

Atmel

Total Page 29 Pages
Datasheet
Download T5557 Datasheet


T5557
Features
Contactless Read/Write Data Transmission
Radio Frequency fRF from 100 kHz to 150 kHz
e5550 Binary Compatible or T5557 Extended Mode
Small Size, Configurable for ISO/IEC 11784/785 Compatibility
75 pF On-chip Resonant Capacitor (Mask Option)
7 × 32-bit EEPROM Data Memory Including 32-bit Password
Separate 64-bit memory for Traceability Data
32-bit Configuration Register in EEPROM to Setup:
– Data Rate
- RF/2 to RF/128, Binary Selectable or
- Fixed e5550 Data Rates
– Modulation/Coding
- FSK, PSK, Manchester, Biphase, NRZ
– Other Options
- Password Mode
- Max Block Feature
- Answer-On-Request (AOR) Mode
- Inverse Data Output
- Direct Access Mode
- Sequence Terminator(s)
- Write Protection (Through Lock-bit per Block)
- Fast Write Method (5 kbps versus 2 kbps)
- OTP Functionality
- POR Delay up to 67 ms
Multifunctional
330-bit
Read/Write
RF-Identification
IC
T5557
Description
The T5557 is a contactless R/W IDentification IC (IDIC®) for applications in the
125 kHz frequency range. A single coil, connected to the chip, serves as the IC’s
power supply and bi-directional communication interface. The antenna and chip
together form a transponder or tag.
The on-chip 330-bit EEPROM (10 blocks, 33 bits each) can be read and written block-
wise from a reader. Block 0 is reserved for setting the operation modes of the T5557
tag. Block 7 may contain a password to prevent unauthorized writing.
Data is transmitted from the IDIC using load modulation. This is achieved by damping
the RF field with a resistive load between the two terminals Coil 1 and Coil 2. The IC
receives and decodes 100% amplitude modulated (OOK) pulse interval encoded bit
streams from the base station or reader.
System Block Diagram
Figure 1. RFID System Using T5557 Tag
Reader
Baseorstation
Base station
Power
Data
Transponder
Memory
*
T5557
* Mask option
Rev. 4517G–RFID–10/04

T5557
T5557 –
Building Blocks
Figure 2. Block Diagram
Coil 1
*
Coil 2
* Mask option
Modulator
Mode register
Controller
Test logic
POR
Memory
(330-bit EEPROM)
Input register
HV generator
Analog Front End (AFE)
The AFE includes all circuits which are directly connected to the coil. It generates the
IC’s power supply and handles the bi-directional data communication with the reader. It
consists of the following blocks:
• Rectifier to generate a DC supply voltage from the AC coil voltage
• Clock extractor
• Switchable load between Coil 1/Coil 2 for data transmission from tag to the reader
• Field gap detector for data transmission from the base station to the tag
• ESD protection circuitry
Data-rate Generator
The data rate is binary programmable to operate at any data rate between RF/2 and
RF/128 or equal to any of the fixed e5550/e5551 and T5554 bitrates (RF/8, RF/16,
RF/32, RF/40, RF/50, RF/64, RF/100 and RF/128).
Write Decoder
This function decodes the write gaps and verifies the validity of the data stream
according to the Atmel e555x write method (pulse interval encoding).
HV Generator
This on-chip charge pump circuit generates the high voltage required for programming
of the EEPROM.
DC Supply
Power is externally supplied to the IDIC via the two coil connections. The IC rectifies and
regulates this RF source and uses it to generate its supply voltage.
2 T5557
4517G–RFID–10/04


Features Features • Contactless Read/Write Data Transmission • Radio Frequency fRF f rom 100 kHz to 150 kHz • e5550 Binary Compatible or T5557 Extended Mode • Small Size, Configurable for ISO/IEC 11 784/785 Compatibility • 75 pF On-chip Resonant Capacitor (Mask Option) • 7 × 32-bit EEPROM Data Memory Including 32-bit Password • Separate 64-bit me mory for Traceability Data • 32-bit C onfiguration Register in EEPROM to Setu p: – Data Rate - RF/2 to RF/128, Bina ry Selectable or - Fixed e5550 Data Rat es – Modulation/Coding - FSK, PSK, Ma nchester, Biphase, NRZ – Other Option s - Password Mode - Max Block Feature - Answer-On-Request (AOR) Mode - Inverse Data Output - Direct Access Mode - Seq uence Terminator(s) - Write Protection (Through Lock-bit per Block) - Fast Wri te Method (5 kbps versus 2 kbps) - OTP Functionality - POR Delay up to 67 ms Multifunctional 330-bit Read/Write RF-I dentification IC T5557 Description The T5557 is a contactless R/W IDentification IC (IDIC®) for applications in the 125 kHz .
Keywords T5557, datasheet, pdf, Atmel, Multifunctional, 330-bit, Read/Write, RF-Identification, IC, 5557, 557, 57, T555, T55, T5, Equivalent, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute




@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)