PIC18F26Q71-I/SS

Microcontrollers Overview

The PIC18F26Q71-I/SS is an 8-bit microcontroller from the PIC18-Q71 family, featuring a PIC18 core. It includes 64 kB of Flash program memory, 4 kB of SRAM data memory, and 256 B of EEPROM. The device operates at a maximum clock frequency of 64 MHz with a supply voltage range of 1.8 V to 5.5 V. It provides 26 I/O pins in an SSOP-28 package. 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 (OPA) to support precision analog signal conditioning within the system.
• Includes Universal Timer Module (UTMR) and multiple timer/counters for precise timing control and event counting.

Microcontrollers Applications

• Industrial sensor nodes requiring high-resolution differential analog input acquisition
• Motor control systems utilizing integrated operational amplifiers for current sensing
• Embedded devices needing robust universal asynchronous receiver-transmitter (UART) communication

Microcontrollers Procurement Notes

Verify the specific silicon revision ID against the official errata document DS80001030C prior to deployment. Certain silicon revisions exhibit functional anomalies in modules such as the Universal Timer, I2C, and Comparator. Ensure that software workarounds described in the errata are implemented to maintain system reliability and correct peripheral operation.

Microcontrollers Selection Notes

Select this component when differential analog measurement accuracy is critical due to the integrated 12-bit differential ADC. The inclusion of dual operational amplifiers reduces external component count for signal conditioning applications. Verify compatibility with the required operating temperature range and ensure sufficient pin availability for the target interface requirements.

Microcontrollers Part Context

This device belongs to the PIC18-Q71 family of 8-bit microcontrollers designed for performance-critical embedded applications. The Q71 series emphasizes enhanced analog capabilities and advanced timer modules compared to previous generations. It utilizes the PIC18 architecture to provide efficient code execution while maintaining low power consumption characteristics suitable for battery-operated or energy-constrained environments.

Microcontrollers Replacement Considerations

Consult Microchip documentation for direct pin-compatible alternatives within the PIC18F26/46/56Q71 series. Note that different silicon revisions may require distinct software handling due to documented errata. Cross-referencing specific feature sets and memory configurations is necessary when evaluating substitute components.

Microcontrollers FAQ

Does the PIC18F26Q71 support Low-Voltage Programming?

Low-Voltage Programming is not possible when the supply voltage (VDD) is below the Brown-out Reset Voltage (BORV) level while BOR is enabled. To use this feature, either disable BOR or raise VDD above the selected BORV level.

How should FSR Shadow Registers be handled?

Direct writes to FSR Shadow Registers do not store accurate values. A specific workaround involving saving regular FSR values, writing computed offsets, and restoring registers must be implemented in software to ensure correct address pointer operations.

What is the behavior of the Comparator module in Ultra-Low Power mode?

The Comparator module will not function in Ultra-Low Power (ULP) mode even if enabled. The recommended workaround is to enable the Temperature Indicator module by setting the TSEN bit in the FVRCON register before enabling the Comparator.