PIC16F18857-I/ML
PIC16F18857-I/ML - 56KB Flash 8-bit MCU, 32MHz XLP | Microchip
The Microchip Technology PIC16F18857-I/ML is an 8-bit RISC PIC microcontroller built around the PIC16 mid-range core, operating at up to 32MHz with 56KB (32K x 14-word) of on-chip Flash program memory, housed in a 28-pin QFN (6x6 mm) package with the -I industrial temperature grade (-40C to +85C). It integrates 4KB SRAM, 256 bytes of EEPROM, a 10-bit Analog-to-Digital Converter (ADC), and rich communication peripherals including EUSART, I2C, and SPI, targeting general-purpose, low-power, and Functional Safety (FuSa) applications.
An 8-bit MCU in the Microchip PIC16 family uses a RISC Harvard-architecture core, providing deterministic instruction execution (most instructions complete in one instruction cycle) for predictable real-time behavior. The "16" in the prefix denotes the mid-range PIC16 architecture, which sits between the baseline PIC10/12/16 families and the high-performance PIC18/PIC24/dsPIC families. These MCUs are widely used in industrial automation, IoT sensor nodes, automotive body electronics, and consumer devices where low power consumption, robust peripherals, and easy in-circuit programmability outweigh the need for high clock speed. LDO regulators, EEPROM memories, and sensor ICs typically complement PIC16 designs; suitable companion devices include Microchip MCP1700 LDOs and MCP2210 USB-to-SPI bridges.
Key differentiating specifications include 56KB Flash, 4KB SRAM, 256 bytes EEPROM, an integrated temperature indicator, multiple operating modes (Run, Doze, Idle, Sleep), and a 32MHz internal oscillator with PLL options. Functional Safety (FuSa) features include a Windowed Watchdog Timer (WWDT), hardware CRC/SCAN, and a built-in self-test (BIST) capability that allows the device to satisfy IEC 60730 Class B safety requirements for home appliances, while eXtreme Low Power (XLP) technology enables nanoWatt standby currents for battery-powered designs.
Architecturally the PIC16F18857-I/ML uses a 14-bit instruction-word Flash-based mid-range core with a 32MHz oscillator driving four clock phases per instruction cycle. The Core Independent Peripheral (CIP) blocks - Configurable Logic Cells (CLC), Numerically Controlled Oscillator (NCO), and Complementary Waveform Generator (CWG) - execute tasks without CPU intervention, freeing the core for application logic. Voltage regulator flexibility from 1.8V to 5.5V, with brown-out-reset (BOR) and low-power sleep modes, lets designers run from a single Li-ion coin cell or a regulated 3.3V supply; the QFN exposed pad must be soldered to a continuous ground plane for thermal dissipation.
Typical applications include IoT sensor nodes, battery-powered remote controls, home appliances targeting IEC 60730 Class B safety, automotive body and interior modules, sensor interface boards, and low-cost motor-control designs. Pairing the device with an MCP2210 USB-to-SPI bridge or an external EEPROM is straightforward because the peripheral pin-select (PPS) feature lets designers route digital functions to almost any available I/O pin.
When designing with this device, ensure that the Watchdog Timer window and BOR thresholds are configured in firmware using the configuration-word settings, and confirm the QFN exposed pad is soldered to the ground plane for thermal dissipation. Using the MPLAB X IDE with the XC8 compiler in free or professional mode is recommended for full CIP-aware code generation and IEC 60730 safety library support.
This page synthesizes distributor inventory, real-time pricing across multiple quantity tiers, pin-compatible drop-in alternatives in the PIC16F1885X/7X family, and practical design notes that complement the manufacturer datasheet for faster engineering decisions.
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