PIC16LC62B-04I/ML
PIC16LC62B-04I/ML - 4MHz 8-bit CMOS MCU, 3.5KB OTP | Microchip
The Microchip Technology PIC16LC62B-04I/ML is a 4 MHz, 8-bit RISC CMOS microcontroller from the PIC16C family, featuring 3.5 KB (2K x 14) of One-Time-Programmable (OTP) program memory and 128 bytes of RAM, housed in a 28-pin QFN package with 22 digital I/O pins. The "LC" prefix denotes the low-voltage (2.5V–5.5V) operating range, the "04" indicates the 4 MHz maximum oscillator frequency, the "I" is the industrial temperature grade (-40°C to +85°C), and the "ML" suffix denotes the 28-lead QFN (Quad Flat No-lead) surface-mount package with an exposed thermal pad.
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and peripherals on a single die; the PIC16 family uses a Harvard RISC architecture with a 14-bit instruction word, where "OTP" (One-Time-Programmable) memory can be written exactly once and is therefore suited to production-volume, low-cost embedded control. Microcontrollers sit at the bottom of the embedded-compute hierarchy above discrete logic but below microprocessors, and they are part of the broader semiconductor / power-management ecosystem that supplies every modern electronic product.
Key features include 22 digital I/O lines, an external oscillator interface, a programmable Watchdog Timer (WDT), Power-on Reset (POR), Brown-out Reset (BOR), and a 10-bit (approximately) analog comparator peripheral. The 4 MHz instruction-cycle throughput delivers approximately 1 MIPS performance, sufficient for slow-loop control tasks such as keyboard scanning, sensor reading, and simple state machines. The wide 2.5 V–5.5 V supply range lets the device run directly from a 3.3 V LDO or a 4-series-cell battery stack.
The PIC16LC62B uses a 14-bit-wide OTP program-memory array (2048 instruction words), a 128-byte general-purpose RAM, and an 8-level hardware stack for subroutines, with peripheral features including a capture/compare/PWM (CCP) module, a USART, and an 8-bit Timer2 counter. The Harvard bus architecture separates instruction and data paths, allowing most instructions to execute in a single 250 ns instruction cycle at 4 MHz. The CMOS process yields very low power consumption, with typical sleep current in the low microampere range, making the device practical for battery-powered and energy-budgeted designs.
Typical applications include low-end consumer-electronic remote controls, white-goods user interfaces (washing-machine front panels, microwave ovens), battery chargers, sensor-conditioning front-ends, and industrial control modules. The wide industrial temperature grade and small surface-mount footprint make the part attractive where size, cost, and reliability matter more than raw CPU throughput.
When designing with this part, ensure that the ICSP (In-Circuit Serial Programming) pins (RB6/RB7) are not heavily loaded by external circuitry during programming, and place a 100 nF decoupling capacitor as close as possible to the VDD/VSS pins. This page synthesizes distributor pricing, drop-in replacement candidates, and practical design notes not found in the manufacturer datasheet.
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