PIC12F1840-I/P
PIC12F1840-I/P - 8-bit 32MHz XLP MCU 7KB Flash | Microchip
The Microchip Technology PIC12F1840-I/P is an 8-bit PIC microcontroller in the enhanced mid-range core family with 7KB (4K x 14) Flash program memory, 256 bytes of EEPROM, and 256 bytes of RAM, housed in an 8-pin PDIP through-hole package. It operates at up to 32 MHz internal clock speed from a 1.8V to 5.5V supply, delivering 49 instructions with 16-level hardware stack, interrupt context saving, and nanoWatt XLP extreme-low-power technology for battery-sensitive designs.
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, RAM, and programmable peripherals into one package. The PIC12F1840 belongs to the 8-bit PIC microcontroller family, itself a subfamily of microcontrollers within the broader integrated circuit and embedded systems taxonomy. Its XLP variants extend the family into ultra-low-power domains where quiescent current is measured in nanoamperes, making the PIC12F1840-I/P a hybrid of compact 8-pin form factor and modern low-power performance.
Key features include six I/O pins multiplexed with peripherals such as a 10-bit ADC, two 8-bit timers, one 16-bit timer, Enhanced PWM, MSSP for SPI/I2C, EUSART, and configurable logic cells. The device supports internal 32 MHz oscillator, 31 kHz LFINTOSC, and PLL, eliminating external crystals in many designs. Core peripherals include a WWDT windowed watchdog, BOR/POR power management, in-circuit serial programming (ICSP), and code protection via Microchip's low-pin-count IP (US Patent 5,847,450).
Architecturally, the PIC12F1840 uses a RISC Harvard CPU with separate program and data buses, single-cycle instruction execution at 32 MHz (125 ns instruction time), and 16-deep hardware stack. The flash memory is self-read/write capable, supporting live firmware updates and data EEPROM emulation. XLP technology provides sleep currents as low as 20 nA typical, with multiple power-managed operating modes (Run, Idle, Sleep) selectable in software.
Typical applications include consumer remote controls, sensor node interfaces, battery-powered IoT edge devices, simple motor control loops, LED driving, and low-cost educational platforms. The 8-pin PDIP form factor is also widely used in retrofits for legacy PIC12F675/PIC12F683 designs, since the PIC12F1840 offers a clean migration path with substantially more memory and peripherals.
When designing with this device, ensure decoupling caps (100 nF + 10 uF bulk) are placed close to VDD/VDDCORE pins, MCLR is pulled up correctly for ICSP, and unused I/O pins are configured as outputs low to minimize current. For automotive or AEC-Q100 work, the PIC12F1840-I/P industrial grade operates from -40C to +85C, so consult the automotive grade separately if required.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
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