ST72E311 ST72T311 8-bit MCU with 8 to 16K OTP/EPROM, 384 to 512 bytes RAM, ADC, WDG, SCI, SPI and 2 timers datasheet.
The ST72T311 is an 8‑bit microcontroller from STMicroelectronics featuring up to 16 KB OTP/EPROM program memory, 384‑512 bytes of RAM, a 16‑bit CPU running at up to 16 MHz, and a range of on‑chip peripherals including ADC, SPI, SCI, watchdog timer and two 16‑bit timers.
The document includes a detailed pin‑out for multiple package types (TQFP44, PSDIP42, PSDIP56, TQFP64), electrical characteristics, memory map, peripheral descriptions, power‑saving modes, and ordering information for the various device variants.
| Program Memory | 8 KB to 16 KB OTP/EPROM |
|---|---|
| Data RAM | 384 bytes to 512 bytes (including 256 bytes stack) |
| CPU Frequency | 8 MHz max (16 MHz oscillator) |
| Operating Supply Voltage | 3 V to 5.5 V |
| Temperature Range | -40 °C to +125 °C |
| Package Types | TQFP44, PSDIP42, PSDIP56, TQFP64 |
| I/O Lines | 44 pins (ST72T311N) or 32 pins (ST72T311J) |
| Timers | Two independent 16‑bit timers |
| SPI Interface | Synchronous Serial Peripheral Interface (SPI) |
| SCI Interface | Asynchronous Serial Communications Interface (SCI) |
| Watchdog | Digital Watchdog timer |
The device supports up to 16 KB of OTP/EPROM program memory.
The ST72T311N version provides 44 I/O pins, while the ST72T311J version provides 32 I/O pins.
It operates from 3 V up to 5.5 V.
The device is rated from –40 °C to +125 °C.