C8051T61x OTP EPROM Microcontrollers

The C8051T61x small microcontroller (MCU) family is pin-for-pin compatible with the C8051F31x series but offers cost-effective OTP EPROM memory instead of flash EEPROM memory. Designers can use flash EEPROM for system development and early production, then move to an OTP EPROM version to obtain a cost savings when in volume production.

With on-chip Power-On Reset, VDD monitor, Watchdog Timer and a clock oscillator, the C8051T61x devices are truly stand-alone system-on-a-chip solutions. User software has complete control of all peripherals, and may individually shut down any or all peripherals for power savings.

Core Frequency
25 Mhz

C8051T61x Common Specs

  • 25 MIPS 8051 CPU
  • 8, 4 or 2 kB one time programmable (OTP) code memory
  • 256 B RAM
  • 10-bit ADC
  • 8 digital I/O, 5 V tolerant
  • 1.8 to 3.6 V supply
  • –40 to 85 ºC operating range
  • On-chip debug


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Part Number MCU Core MHz Flash (kB) RAM (kB) Dig I/O Pins 5 Volt Tolerant ADC 1 USB Temp Sensor Timers (16-bit) PCA Channels ADC 2 DAC Comparators UART SPI I2C HS I2C Slave I2S EMIF CAN LIN AES AEC-Q100 Vdd (min) Vdd (max) Package Type Package Size (mm) Internal Osc. VREF Debug Interface

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