Product Overview
The PIC18F45K22-I is a 40-pin, 8-bit high-performance low-power Flash microcontroller from Microchip Technology featuring the PIC18 architecture with XLP (eXtreme Low-Power) technology. With 16 MIPS performance and a 31-level deep hardware stack, this feature-rich MCU offers 32KB (16K x 16) of Flash program memory, 1536 bytes of RAM, and 256 bytes of data EEPROM. Operating at up to 64 MHz across a wide voltage range of 2.3V to 5.5V, it integrates a 28-channel 10-bit ADC, two rail-to-rail analog comparators, two CCP and three ECCP modules, dual MSSP (SPI/I2C), one EUSART with LIN support, a CTMU for capacitive touch, a 5-bit DAC, and an internal 16 MHz oscillator with PLL. As the 40-pin version of the popular K22 family, the PIC18F45K22 provides 36 I/O pins, 28 ADC channels, and full ECCP/CCP PWM capabilities, making it ideal for industrial control, automotive applications, consumer appliances, battery-powered devices, and sensor interfaces requiring high analog integration in a mid-size package.
Key Specifications
| Core Architecture | 8-bit PIC18 RISC Architecture |
| Program Memory | 32KB Flash (16K x 16 words) |
| RAM | 1536 bytes (1.5 KB) |
| Data EEPROM | 256 bytes |
| Maximum Speed | 64 MHz (16 MIPS) |
| Operating Voltage | 2.3V to 5.5V |
| I/O Pins | 36 |
| ADC | 10-bit, 28 channels with auto-acquisition |
| Comparators | 2 rail-to-rail analog comparators |
| DAC | 5-bit rail-to-rail DAC |
| Timers | 4 x 16-bit + 3 x 8-bit = 7 total timers |
| PWM | 2 x CCP + 3 x ECCP = 5 total PWM modules |
| Communication | EUSART/LIN, 2 x SPI, 2 x I2C (dual MSSP) |
| Capacitive Touch | CTMU module (Charge Time Measurement Unit) |
| Voltage Reference | FVR: 1.024V / 2.048V / 4.096V |
| HLVD | Programmable High/Low-Voltage Detection, 16 levels |
| Internal Oscillator | 16 MHz factory calibrated +/-1%, 31 kHz-16 MHz |
| PLL | 4x PLL for up to 64 MHz |
| Low Power | XLP nanoWatt, 100 nA Sleep typical |
| Stack Levels | 31-level software accessible hardware stack |
| Hardware Multiplier | 8 x 8 single-cycle hardware multiplier |
| Debug | In-Circuit Debug (ICD) |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 40-pin PDIP / 44-pin TQFP / QFN |
Features
- C compiler optimized PIC18 RISC architecture, 16 MIPS at 64 MHz
- 31-level deep software accessible hardware stack
- 8 x 8 single-cycle hardware multiplier
- Priority levels for interrupts
- Linear program memory addressing to 64 KB
- Linear data memory addressing to 4 KB
- eXtreme Low-Power (XLP) nanoWatt technology
- Sleep mode: 100 nA; WDT: 500 nA; T1OSC: 500 nA @ 32kHz
- 28-channel 10-bit ADC with auto-acquisition, conversion during Sleep
- Two rail-to-rail analog comparators
- 5-bit rail-to-rail resistive DAC with FVR support
- Fixed Voltage Reference (FVR): 1.024V, 2.048V, 4.096V
- Three Enhanced CCP (ECCP): PWM steering, dead time, auto-shutdown
- Two standard CCP (Capture/Compare/PWM) modules
- CTMU for capacitive touch sensing (buttons, sliders, touchscreen)
- Programmable High/Low-Voltage Detection (HLVD): 16 levels
- Dual MSSP modules: 2x SPI + 2x I2C (Master/Slave with address mask)
- Enhanced USART (EUSART): RS-232/RS-485/LIN 2.0, auto-baud detect
- Internal 16 MHz oscillator factory calibrated to +/-1%
- 4x Phase Lock Loop (PLL) for 64 MHz operation
- Fail-Safe Clock Monitor and Two-Speed Oscillator Start-up
- Peripheral Module Disable (PMD) for power optimization
- Seven timer modules: 4 x 16-bit + 3 x 8-bit
- Programmable Brown-out Reset (BOR)
- Extended Watchdog Timer (WDT) with on-chip oscillator
- Self-programmable under software control
- In-Circuit Serial Programming (ICSP) and In-Circuit Debug (ICD)
- 36 I/O pins with 25 mA sink/source capability
- Programmable code protection
- Recommended for Automotive Design (AEC-Q100)
Applications
- Industrial control systems and sensor interfaces
- Automotive body electronics and LIN bus nodes
- Consumer electronics and smart appliances
- Motor control and power management
- Multi-channel data acquisition systems
- Home automation and IoT device endpoints
- Medical devices and instrumentation