ST21Y144 is a smartcard MCU with 144 Kbytes high density EEPROM. Its major applications include mobile communications (GSM and CDMA) and Java applications. Hardware features include enhanced 8/16-bit CPU core, 16 MBytes linear addressable memory, 400 Kbytes user ROM, 8 Kbytes user RAM, and 144 Kbytes user EEPROM.
The ST21Y144 is a serial access microcontroller designed for cost-effective secure mobile applications. It features an enhanced 8/16-bit CPU core with 16 MBytes of linear addressable memory, including 144 Kbytes of User EEPROM and a dedicated OTP area.
Key hardware capabilities include a DES accelerator for cryptographic operations, a True Random Number Generator, and an Asynchronous Receiver Transmitter supporting ISO 7816-3 T=0 and T=1 protocols. The device operates with supply voltages ranging from 1.8V to 5V and supports clock frequencies up to 22 MHz.
| EEPROM Capacity | 144 Kbytes |
|---|---|
| User ROM Size | 400 Kbytes |
| User RAM Size | 8 Kbytes |
| Max CPU Clock Frequency | 22 MHz |
| External Clock Range | 1 to 7.5 MHz |
| Supply Voltage Ranges | 1.8V, 3V and 5V |
| Data Retention | 10-year |
| Erase/Write Cycles Endurance | 500,000 |
It supports ISO 7816-3 T=0 and T=1 protocols via its Asynchronous Receiver Transmitter.
Yes, it includes a Hardware DES accelerator for cryptographic performance.