PIC12F675-E/SN
PIC12F675-E/SN - 8-Bit 20MHz 1.75KB Flash MCU SOIC-8 | Microchip
The Microchip Technology PIC12F675-E/SN is an 8-bit CMOS Flash-based microcontroller in an 8-pin SOIC package, featuring a 20MHz CPU, 1.75KB (1K x 14) of Flash program memory, 64 bytes of SRAM, and 128 bytes of EEPROM data memory. Operating from 2.0V to 5.5V, it integrates a 10-bit A/D converter with 4 input channels, a single analog comparator, and 6 general-purpose I/O pins in a compact 8-pin footprint.
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals around an 8-bit data bus. The PIC12F675 belongs to the PIC10/12/16 mid-range family of microcontrollers -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. Microchip's PIC architecture uses a Harvard RISC design with only 35 single-word instructions, enabling 200ns instruction execution at 20MHz. This combination of compact code density, deterministic timing, and self-contained peripherals makes the PIC12F675 a reference baseline for cost-sensitive embedded control in appliance, sensor, and lighting applications.
Key features of the PIC12F675-E/SN include 4 channels of 10-bit ADC with voltage reference, one analog comparator with programmable on-chip reference, an internal 4MHz oscillator (calibrated to ±1%), an internal 20MHz RC oscillator option, an enhanced universal synchronous/asynchronous receiver-transmitter (EUSART) for serial communication, and in-circuit serial programming (ICSP) for field-upgradeable firmware. The 'E' suffix denotes the extended industrial temperature range of -40C to +125C, which is critical for outdoor, automotive under-hood, and industrial environments.
Architecturally, the PIC12F675 uses a 14-bit wide instruction word with single-cycle execution except for program branches (two cycles). The Flash program memory is rated for 100,000 erase/write cycles and EEPROM data memory for 1,000,000 cycles, supporting firmware that stores calibration, configuration, or runtime counters in non-volatile memory. The device's nanoWatt power management suite includes multiple power-managed operating modes (Run, Idle, Sleep) and wake-on-change I/O to minimize quiescent current in battery-powered designs.
Typical applications include PIR motion sensor signal conditioning, LED lighting controllers, battery chargers, smart sensor nodes, fan controllers, smoke detectors, and simple user-interface controllers (button + LED, I2C slave). The on-chip comparator and ADC enable direct interfacing with analog sensors (temperature, light, gas), eliminating the need for external signal conditioning and shrinking the BOM in space-constrained designs.
A primary design consideration is the supply voltage: the PIC12F675-E/SN is rated 2.0V to 5.5V; for designs that need operation below 2.0V or that require higher ADC resolution, consider the PIC12F683 (10-bit ADC, more memory) or PIC12F1840 (7-bit DAC, more peripherals) as functional upgrades that retain the 8-pin SOIC footprint.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone.
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