PIC16LCE625-04/P
PIC16LCE625-04/P - 3.5KB OTP 8-bit MCU, 4MHz, 18-PDIP | Microchip
The Microchip Technology PIC16LCE625-04/P is an 8-bit RISC PIC microcontroller in the PIC16C family with 3.5KB (2K x 14) OTP program memory, 128 bytes of RAM, and 13 digital I/O pins, housed in a through-hole 18-pin PDIP package. The "LCE" suffix indicates a low-power CMOS variant operating from 2.5V to 5.5V with the "04" speed grade offering a 4 MHz maximum clock. The device is part of the legacy PIC16C6x mid-range family, designed for embedded control applications requiring compact code, low power, and robust I/O.
A PIC microcontroller is a programmable single-chip computer built around a Harvard architecture with separate program and data buses, optimized for deterministic real-time control. Within the broader taxonomy, the PIC16C62x belongs to the mid-range PIC16 family, which sits between the baseline PIC10/12/16/17 families and the enhanced PIC18 family. It integrates CPU core, Flash/OTP program memory, RAM, EEPROM data memory, and peripherals (timers, A/D, USART, comparators) on a single die, and is programmed using Microchip's MPLAB X toolchain with XC8 C compiler support.
Key features of the PIC16LCE625-04/P include 13 bidirectional I/O pins capable of 25 mA source/sink, an enhanced 8-bit A/D converter, two 8-bit timers plus one 16-bit timer, a watchdog timer with on-chip RC oscillator, and an internal 4 MHz RC oscillator option that eliminates the external crystal in many designs. The device supports in-circuit serial programming (ICSP) via two pins, allowing firmware updates after PCB assembly. Brown-out reset, power-on reset, and a wide commercial operating temperature range ensure reliable field operation.
Typical applications include appliance control, sensor signal conditioning, low-speed serial communication bridges, and battery-powered instrumentation. The combination of OTP memory (one-time programmable, lower unit cost than Flash) and through-hole PDIP packaging makes this part especially suitable for hobbyist projects, educational kits, and legacy industrial controllers. For new designs, Microchip recommends the pin-compatible PIC16F family Flash parts, but the PIC16LCE625-04/P remains widely stocked for maintenance of existing installations.
When designing with this part, engineers should provide adequate bulk decoupling (100 nF plus 10 uF near VDD) and route the MCLR reset pin with proper pull-up. For low-power designs, the LP oscillator mode reduces current consumption to microamps in sleep mode. Engineers should also note that OTP memory cannot be erased or rewritten, so a Flash equivalent (such as PIC16F628A in the same 18-pin DIP footprint) is preferable for prototype and low-volume development.
This page synthesizes distributor pricing, pin-compatible drop-in alternatives (both same-brand Microchip variants and competitor equivalents in 18-PDIP), and practical design notes drawn from the Microchip PIC16C62x datasheet family, providing information not consolidated on any single distributor or manufacturer page.
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