PIC16LC65B-04/PT

Updated: 2026-09-12

Overview

The PIC16LC65B-04/PT is an 8-bit microcontroller from Microchip's PIC16C series, optimized for low-power embedded applications. It operates at 4 MHz with a wide voltage range (2.5V-5.5V), making it suitable for battery-operated devices. The device includes 3 KB of Flash program memory and 134 bytes of RAM, offering balanced performance for control-oriented tasks. Its CMOS technology ensures energy efficiency, with typical current consumption under 2 mA during active operation.

Structure and Working Principle

The microcontroller follows a Harvard architecture with separate program and data buses, enabling efficient instruction execution. It features a RISC-based CPU core with 33 single-word instructions and two-level deep hardware stack. The IC integrates peripherals including a 13-bit timer/counter, watchdog timer, and 22 I/O pins with individual direction control. Its working principle centers on fetching instructions from program memory, decoding them, and executing operations through the ALU and peripheral modules.

Key Features

Low-voltage operation (down to 2.5V) makes the device ideal for portable electronics. The Power-on Reset and Watchdog Timer enhance system reliability, while the Power-saving SLEEP mode reduces current to microamp levels. Development is supported by MPLAB IDE and standard programming tools. The 28-pin TQFP package (PT suffix) offers compact footprint for space-constrained designs. All I/O pins feature high sink/source capability for direct LED or small relay driving.

Application Areas

Primary applications include consumer electronics (remote controls, toys), industrial sensors, and automotive subsystems where power efficiency is critical. The wide operating voltage allows direct battery connection without regulation in many cases. The microcontroller is commonly used in HID (Human Interface Devices), smart sensors, and low-speed data acquisition systems. Its balance of performance and power consumption makes it popular in medical portable devices and energy metering applications.

Maintenance and Precautions

Proper handling requires ESD protection during installation and maintenance. The Flash memory has approximately 10,000 erase/write cycles - firmware should minimize write operations to extend lifespan. Power supply should be stable within specified limits; voltage spikes beyond 5.5V can damage the device. During development, use current-limiting resistors on I/O pins when interfacing with external circuits. Programming lock bits should be set for production units to protect firmware.

B2B Procurement Guide

When sourcing the PIC16LC65B-04/PT, verify the manufacturer code and date stamp to ensure genuine Microchip products. MOQ typically starts at 100 pieces, with price breaks at 1,000 unit quantities. Consider lead times (commonly 6-8 weeks for large orders) and alternative packaging options if the TQFP package presents assembly challenges. Evaluate total cost including programming services if buying pre-programmed units. Distributors often provide sample quantities for evaluation before volume purchases.