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PIC18F27K42-I/SS

MCHPPIC18F27K42-I/SS

Microchip Technology
PIC PIC® XLP™ 18K Microcontroller IC 8-Bit 64MHz 128KB (64K x 16) FLASH 28-SSOP
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Overview

The PIC18F27K42-I/SS is a high-performance 8-bit microcontroller featuring 128KB of Flash memory and 8K of RAM in a compact 28-pin SSOP package. Part of the PIC18-K42 family, it integrates Core Independent Peripherals (CIPs) and eXtreme Low-Power (XLP) technology for efficient, low-current operation at speeds up to 64MHz.

Why Choose This Part

This MCU offers a massive 128KB Flash capacity for an 8-bit device, allowing for complex firmware and large lookup tables. The inclusion of Direct Memory Access (DMA) and Vectored Interrupts significantly improves data throughput and interrupt latency compared to traditional 8-bit architectures.

Applications

Industrial Sensor Nodes
Utilizes the 10-bit ADC with Computation (ADC2) and Zero-Cross Detect for automated signal processing without CPU intervention.
Battery-Powered Handhelds
Leverages XLP technology and a 0.05 uA sleep current to extend operating life in portable electronic devices.
Automated Control Systems
The integrated DMA and Windowed Watchdog Timer (WWDT) provide robust execution for safety-critical monitoring tasks.
Capacitive Touch Interfaces
Hardware Capacitive Voltage Divider (CVD) support enables responsive touch buttons and proximity sensing with minimal code overhead.

Key Specifications

Speed 64MHz
RAM Size 8K x 8
Core Size 8-Bit
EEPROM Size 1K x 8
Peripherals Brown-out Detect/Reset, DMA, HLVD, POR, PWM, WDT
Connectivity I2C, LINbus, SPI, UART/USART
Mounting Type Surface Mount
Number of I/O 25
Core Processor PIC
Package / Case 28-SSOP (0.209", 5.30mm Width)
Data Converters A/D 24x12b; D/A 1x5b
Oscillator Type Internal
Program Memory Size 128KB (64K x 16)
Program Memory Type FLASH
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 28-SSOP
Voltage - Supply (Vcc/Vdd) 2.3V ~ 5.5V

Getting Started

Developers can begin evaluation using the MPLAB X IDE and the XC8 compiler. Hardware debugging and programming are typically handled via the MPLAB PICkit 4 or Snap in-circuit debuggers, while the Curiosity Nano evaluation board provides a quick-start platform for this family.

PIC18F27 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Flash RAM Package ADC/DAC Peripherals Temp Range Stock
PIC18F27K42-I/SS (this part) 128KB 8K SSOP-28 A/D 24x12b; D/A 1x5b Brown-out Detect/R.. -40degC ~ 85degC (.. 853
PIC18F27K40-I/SP 128KB 3.6K DIP-28 A/D 24x10b; D/A 1x5b Brown-out Detect/R.. -40degC ~ 85degC (.. 905
PIC18F27K40T-I/SS 128KB 3.6K SSOP-28 A/D 24x10b; D/A 1x5b Brown-out Detect/R.. -40degC ~ 85degC (.. 2,630
PIC18F27K42-I/SP 128KB 8K DIP-28 A/D 24x12b; D/A 1x5b Brown-out Detect/R.. -40degC ~ 85degC (.. 661
PIC18F27K42-E/SO 128KB 8K SOIC-28 A/D 24x12b; D/A 1x5b Brown-out Detect/R.. -40degC ~ 125degC .. 3,146
PIC18F27Q10-I/SO 128KB 3.53K SOIC-28 A/D 24x10b; D/A 1x5b Brown-out Detect/R.. -40degC ~ 85degC (.. 652
PIC18F27Q43-I/SO 128KB 8K SOIC-28 A/D 24x12b; D/A 1x8b Brown-out Detect/R.. -40degC ~ 85degC (.. 1,530
PIC18F27K42-E/SS 128KB 8K SSOP-28 A/D 24x12b; D/A 1x5b Brown-out Detect/R.. -40degC ~ 125degC .. 113
PIC18F27K42-I/SO 128KB 8K SOIC-28 A/D 24x12b; D/A 1x5b Brown-out Detect/R.. -40degC ~ 85degC (.. 1,778
PIC18F27Q43-I/SP 128KB 8K DIP-28 A/D 24x12b; D/A 1x8b Brown-out Detect/R.. -40degC ~ 85degC (.. 465
PIC18F27Q10-I/SP 128KB 3.53K DIP-28 A/D 24x10b; D/A 1x5b Brown-out Detect/R.. -40degC ~ 85degC (.. 456
PIC18F27K40-I/SO 128KB 3.6K SOIC-28 A/D 24x10b; D/A 1x5b Brown-out Detect/R.. -40degC ~ 85degC (.. 1,314
PIC18F27K42-E/ML 128KB 8K VQFN-28 A/D 24x12b; D/A 1x5b Brown-out Detect/R.. -40degC ~ 125degC .. 102
PIC18F27Q43-E/SO 128KB 8K SOIC-28 A/D 24x12b; D/A 1x8b Brown-out Detect/R.. -40degC ~ 125degC .. 168
PIC18F27Q43-E/SS 128KB 8K SSOP-28 A/D 24x12b; D/A 1x8b Brown-out Detect/R.. -40degC ~ 125degC .. —
PIC18F27K40-E/SO 128KB 3.6K SOIC-28 A/D 24x10b; D/A 1x5b Brown-out Detect/R.. -40degC ~ 125degC .. —

Also Consider

ATmega1284P MCHPMicrochip Technology - An alternative 8-bit architecture with 128KB Flash that is widely supported in the AVR ecosystem.
STM32L071KBT6 STMicroelectronics - A 32-bit Cortex-M0+ alternative with similar pin count and flash size for applications requiring higher computational throughput.