PIC18F26Q71-I/SO

Microcontrollers Overview

The PIC18F26Q71-I/SO is an 8-bit microcontroller from the PIC18-Q71 family, featuring a PIC18 core with a maximum clock frequency of 64 MHz. It includes 64 kB of Flash program memory, 4 kB of SRAM data memory, and 256 B of EEPROM. The device provides 26 I/O pins in an SOIC-28 package and operates within a supply voltage range of 1.8 V to 5.5 V across temperatures from -40°C to +85°C. Key peripherals include two operational amplifiers, a 12-bit differential ADC with computation capabilities, and standard communication interfaces such as I2C, SPI, and UART.

Microcontrollers Feature Summary

• Features a 12-bit differential analog-to-digital converter (ADC) equipped with hardware computation functions for signal processing tasks.
• Integrates two dedicated operational amplifiers (OPAs) to support precision analog signal conditioning and measurement applications.
• Includes Universal Timer modules with level-triggered start/reset capabilities and dead-zone generation for motor control applications.

Microcontrollers Applications

• Motor control systems requiring precise timing and analog feedback
• Industrial sensor interfaces utilizing differential ADC inputs
• Battery-powered devices leveraging low-voltage operation

Microcontrollers Procurement Notes

Verify the specific silicon revision ID (A2, A3, or A4) against the official errata document DS80001030C prior to design finalization. Several silicon anomalies affect Universal Timer interrupts, I2C multi-host arbitration, and comparator functionality in ultra-low power modes. Implementing the documented workarounds is essential for reliable operation in affected revisions.

Microcontrollers Selection Notes

Select this component when high-resolution differential analog acquisition is required alongside robust timer control features. The inclusion of on-chip operational amplifiers reduces external component count compared to standard PIC18 variants. Ensure software architecture accounts for the specific silicon errata related to FSR shadow registers and UART transmission states.

Microcontrollers Part Context

This device belongs to the PIC18-Q71 family, which emphasizes enhanced analog performance and advanced timer architectures. It shares the core instruction set with other PIC18 mid-range devices but distinguishes itself through the integrated differential ADC and dual OPAs. The Q71 series targets applications demanding higher analog accuracy than previous generations.

Microcontrollers Replacement Considerations

PIC18F26Q71-E/SS

Microcontrollers FAQ

How does the silicon errata affect Universal Timer interrupts after exiting debug mode?

Universal Timer interrupts may fail to function after leaving debug mode. The recommended workaround is to toggle the Peripheral Module Disable (PMD) bit for the corresponding UTMR instance at the beginning of the main() function before initializing the module.

What is the impact of the I2C bus time-out anomaly in Client mode?

In Client mode, a bus time-out during clock stretching may cause the module to hang the bus by failing to detect the stop condition properly. The workaround involves resetting the module by toggling the Enable (EN) bit.