PIC18F67K22T-I/MRRSL
PIC18F67K22T-I/MRRSL - 64MHz 8-bit MCU, 128KB Flash | Microchip
The Microchip Technology PIC18F67K22T-I/MRRSL is a member of the PIC18F87K22 family and is housed in a 64-pin VQFN (9x9 mm) package. It integrates a 64 MHz 8-bit PIC core with 128 KB of enhanced Flash program memory (64K x 16 organization), 4 KB of RAM, and 1 KB of EEPROM. The device is supplied from a 4.2 V to 5.5 V rail, includes 54 digital I/O lines, and is qualified for the -40 C to +85 C industrial temperature range. The "T" suffix denotes Tape & Reel (TR) packaging, and the "/MRRSL" suffix pin-points the 64-VQFN form factor. nanoWatt XLP technology for sub-uA sleep currents, a 12-bit ADC, and a Charge Time Measurement Unit (CTMU) block round out the silicon feature list.
A PIC18 microcontroller is an 8-bit Harvard-architecture CPU built around modified RISC instruction set with 16-bit opcodes, designed for deterministic interrupt response and a flat memory model ideal for embedded C and assembly development. PIC18 devices sit at the upper end of Microchip's 8-bit portfolio, above PIC10/PIC12/PIC16 and below the 16-bit dsPIC/PIC24 families, and are commonly used as battery-friendly system controllers that bridge analog sensing, communication buses, and low-power sleeping behavior.
Key features include operation at up to 64 MHz (16 MIPS), hardware peripherals such as I2C, SPI, LIN-compatible USARTs, 12-bit A/D conversion up to 1 MSPS, multiple PWM/capture/compare modules, a Real-Time Clock/Counter with RTCC, and ultra-low-power nanoWatt XLP modes reaching below 100 nA in deep sleep. The CTMU peripheral allows accurate time-of-flight measurement for capacitive touch, temperature sensing, and humidity interfacing without an external timer.
Architecturally, the part combines a 16-bit wide Flash with a 2-stage pipeline and a hardware multiplier, achieving 16 MIPS throughput at 64 MHz while supporting on-chip self-programmability for bootloader and field-update flows. The internal voltage regulator produces 1.8 V for the core from the external 4.2-5.5 V supply; decoupling on Vcap follows the datasheet guidelines. Compared to PIC24/dsPIC parts the PIC18F67K22 trades DSP extension for simpler instruction set, lower cost, and lower active/sleep current.
Typical use cases include human-machine interfaces, capacitive touch key pads via CTMU, industrial sensor hubs, battery-powered metering nodes, automotive body controllers (sub-systems), and USB-less mid-range embedded controllers. The 54 I/O plus 12-bit ADC also suit analog signal conditioning, lighting ballast control, and wired sensor networks.
When designing with this MCU, leave adequate Vcap reservoir capacitance close to the dedicated regulator pin and follow Microchip's recommended decoupling topology to keep the internal 1.8 V rail clean during ADC acquisition. For long battery life, use nanoWatt XLP sleep modes with peripheral clock gating and configure the RTCC as a low-power wake source.
This page synthesizes distributor pricing, drop-in Microchip and cross-brand alternatives, and practical design notes not found in the manufacturer datasheet alone, helping engineers compare, source, and qualify the PIC18F67K22T-I/MRRSL faster.
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