This document describes the features and characteristics of the SRI4K 13.56 MHz short-range contactless memory chip, including compliance with ISO 14443-2 Type B and ISO 14443-3 Type B standards, 13.56 MHz carrier frequency, 4096-bit EEPROM, and anticollision functions.
The SRI4K is a 13.56 MHz short-range contactless memory chip powered by an externally transmitted radio wave. It contains a 4096-bit user EEPROM organized into 128 blocks of 32 bits and includes an 8-bit Chip_ID based anticollision system. The device complies with the ISO 14443-2 Type B air interface and ISO 14443-3 Type B frame format recommendations.
The chip features a resettable OTP area, two 32-bit binary counters, and a 4096-bit EEPROM with write protect features. It supports a data transfer rate of 106 kbit/second using an 847 kHz subcarrier frequency. The datasheet details the signal description, data transfer protocols, memory mapping, operation states, anticollision sequences, and command set.
| Carrier frequency | 13.56 MHz |
|---|---|
| Subcarrier frequency | 847 kHz |
| Data transfer rate | 106 Kbit/second |
| EEPROM capacity | 4096-bit |
| Unique Identifier | 64-bit |
| Erase/write cycles | 1 million |
| Data retention | 40-year |
| Programming time | 5 ms typical |
The data transfer rate between the SRI4K and the reader is 106 kbit/s in both reception and emission modes.
Yes, it is ISO 14443-2 Type B air interface compliant and ISO 14443-3 Type B frame format compliant.
The typical programming time for the SRI4K is 5 ms.