PIC16LC662-04I/P
PIC16LC662-04I/P - 8-bit 4MHz 7KB OTP MCU DIP-40 | Microchip
The Microchip Technology PIC16LC662-04I/P is an 8-bit CMOS RISC microcontroller with 7 KB of OTP program memory (4K x 14) and 33 digital I/O lines, housed in a 40-pin windowed CERDIP-0.600 package. It is specified for 4 MHz maximum clock operation, dual supply support at 2.5 V to 5.5 V, and the -04 speed grade with 4 MHz performance. According to manufacturer datasheet resources, the device is built on the PIC16 mid-range core with a Harvard architecture and a 14-bit instruction word, providing deterministic interrupt response and single-cycle instruction execution except for branches.
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, working RAM, non-volatile data EEPROM, and programmable peripherals. The PIC16C/LC66x family occupies the mid-range tier of Microchip's 8-bit portfolio, positioned between the baseline PIC10/12/16 families and the high-pin-count PIC17/PIC18 series. Within the broader power-management and embedded hierarchy, an 8-bit MCU like the PIC16LC662 serves as the system supervisor: it sequences power rails, polls sensors through its ADC, drives actuators through PWM, and runs the application firmware. The 'LC' suffix indicates a low-voltage CMOS variant optimized for battery-powered systems, while 'C' indicates the OTP/EPROM program-memory technology.
Key features of the PIC16LC662 include a 10-bit multi-channel ADC (8 channels typical for this family), a USART/SCI serial port for asynchronous or synchronous communication, an SSP/SPI/I2C-compatible synchronous serial port, three hardware timers (one 8-bit Timer0 with prescaler, one 16-bit Timer1 with prescaler, one 8-bit Timer2 with prescaler), a watchdog timer with its own on-chip RC oscillator, and a capture/compare/PWM module. The -04 speed grade delivers 4 MHz / 250 ns instruction cycle. Brown-out reset and power-on reset are integrated. The windowed CERDIP package exposes the die for UV erasure, enabling prototype development cycles that require code revision.
The architecture uses a 14-bit program word, an 8-bit data path, and a 35-instruction set with single-cycle execution. Memory is mapped as separate program and data spaces (Harvard), with 192 bytes of RAM and 128 bytes of EEPROM. The 33 I/O pins are organized into 5 ports (PORTA-PORTE) with individual direction control. Peripheral features include a parallel slave port for external bus expansion, two analog comparators, and a reference voltage module for the ADC.
Typical applications for the PIC16LC662 include industrial control, automotive body and chassis subsystems, instrumentation, motor control, sensor interfacing, and embedded data acquisition. Designers choose this family for deterministic real-time behavior, code-density advantage of 14-bit instructions, and the broad ecosystem of MPLAB development tools. The windowed CERDIP form factor is most common in through-hole legacy designs and in development/engineering builds that require frequent code iteration.
When designing with the PIC16LC662, observe the maximum clock frequency derating over temperature and voltage: at 5 V the device supports 20 MHz; at 3.3 V operation the maximum is typically 10 MHz; at 2.5 V the maximum is 4 MHz, which corresponds to the -04 speed grade. Place decoupling capacitors within 5 mm of the VDD/VSS pins and provide a low-impedance analog AVdd/AVss pair for the ADC. Designers migrating to newer revisions should consider the PIC16F877 or PIC18F family for in-system programmability.
This page synthesizes distributor pricing, drop-in alternative MPNs, design notes, and selection guidance not consolidated on any single manufacturer or distributor page.
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