PIC16LCE625-04/P - 3.5KB OTP 8-bit MCU, 4MHz, 18-PDIP | Microchip
MPN: PIC16LCE625-04/P ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.92 | $3.92 |
| 10 | $3.52 | $35.20 |
| 100 | $2.84 | $284.00 |
| 500 | $2.41 | $1,205.00 |
| 1,000 | $2.05 | $2,050.00 |
PIC16LCE625-04/P Overview
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.
Drop-in alternatives for PIC16LCE625-04/P — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC16LCE625-04/P (same form factor and footprint) — differing in Timers, Core, Package, Brown-out Reset, I/O Pins.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LC625-04/P
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16LC622-04/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F628A-I/P
✅ Drop-In✓ In Stock
$1.62 / Unit
View Datasheet →PIC16F84A-04/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LCE625-04/P Maximum Ratings & Electrical Characteristics
| Core | PIC 8-bit RISC |
| Family | PIC16C62x (mid-range) |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 3.5 KB (2K x 14) |
| RAM | 128 bytes |
| Data EEPROM | 128 bytes |
| Maximum Clock Frequency | 4 MHz |
| Operating Voltage Range | 2.5 V to 5.5 V |
| I/O Pins | 13 |
| Timers | 2 x 8-bit, 1 x 16-bit |
| Watchdog Timer | Yes (with on-chip RC) |
| Package | 18-pin PDIP (DIP-18, 0.300 inch / 7.62 mm) |
| Mounting Type | Through-Hole |
| Operating Temperature | 0 C to +70 C (Commercial) |
| ICSP Programming | Yes (In-Circuit Serial Programming) |
PIC16LCE625-04/P Pin Configuration
| Pin 1 | MCLR/VPP — Master Clear (Reset) input / Programming voltage |
| Pin 2 | RA0/AN0 — PORTA bit 0 / Analog input channel 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / Analog input channel 1 |
| Pin 4 | RA2/AN2 — PORTA bit 2 / Analog input channel 2 |
| Pin 5 | RA3/AN3/VREF — PORTA bit 3 / Analog input channel 3 / Voltage reference |
| Pin 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 7 | RA5/SS/AN4 — PORTA bit 5 / SPI slave select / Analog input channel 4 |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKIN — Oscillator crystal input / External clock input |
| Pin 10 | OSC2/CLKOUT — Oscillator crystal output / Clock output |
| Pin 11 | RC0 — PORTC bit 0 |
| Pin 12 | RC1 — PORTC bit 1 |
| Pin 13 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM channel 1 |
| Pin 14 | RC3 — PORTC bit 3 |
| Pin 15 | RC4 — PORTC bit 4 |
| Pin 16 | RC5 — PORTC bit 5 |
| Pin 17 | RC6 — PORTC bit 6 |
| Pin 18 | RC7 — PORTC bit 7 |
Typical Applications
PIC16LCE625-04/P is suitable for 6 applications: Legacy Appliance Control, Industrial Sensor Interface, Hobbyist and Educational Kits, Battery-Powered Sensor Nodes, Automotive Aftermarket Electronics, Low-Speed Serial Communication Bridges.
Legacy Appliance Control
The PIC16LCE625-04/P's 3.5 KB OTP memory and 13 I/O at 4 MHz make it a practical controller for low-cost appliance boards where firmware is finalized and cost dominates. Specifically, its 25 mA per-pin sink/source capability can drive relay coils, triac gates, and LED indicators directly without external drivers, and the integrated 4 MHz internal RC oscillator eliminates the external crystal in many washing-machine, microwave, and HVAC control boards. Compared with the Flash-based PIC16F628A, OTP memory lowers unit cost by roughly 10-15% in volume, justifying OTP selection when firmware is locked.
Recommended
Industrial Sensor Interface
The PIC16LCE625-04/P suits industrial sensor interface boards where deterministic response time and 5V tolerance are required. Its 8-bit ADC (referenced in the PIC16C62x family datasheet) provides analog-to-digital conversion for temperature, pressure, and 4-20 mA loop signals, while the two 8-bit timers plus one 16-bit timer support PWM-driven actuator control and frequency measurement. The 0 C to +70 C commercial operating range covers indoor industrial enclosures, and brown-out reset protects against supply glitches common in factory environments.
Recommended
Hobbyist and Educational Kits
The PIC16LCE625-04/P in 18-pin PDIP through-hole package is widely used in hobbyist projects and university microcontroller courses because the DIP form factor is breadboard-friendly and the PIC16C62x instruction set is well documented. Its 13 I/O and 128 bytes RAM support projects ranging from blinking LED arrays to line-following robots and serial communication exercises. Educational kits such as Microchip's PICkit-supported boards often ship with PIC16F or PIC16C variants in 18-PDIP for solder-free prototyping.
Recommended
Battery-Powered Sensor Nodes
The PIC16LCE625-04/P's "LC" low-power CMOS variant operates from 2.5V to 5.5V and supports a Sleep mode that reduces current to microamp levels, making it suitable for battery-powered remote sensor nodes that wake periodically to take a measurement and transmit. With a 3.6V lithium battery and 1% duty-cycle wake, theoretical battery life exceeds 5 years. The on-chip watchdog timer with internal RC oscillator ensures the node recovers from software lockups without external components.
Recommended
Automotive Aftermarket Electronics
Although the standard PIC16LCE625-04/P is rated 0 C to +70 C, the family supports the "-04E/P" extended-temperature variant (PIC16LCE625-04E/P) for under-dash automotive aftermarket installations. Its robust 13 I/O can drive fuel-cutoff relays, alarm LEDs, and remote-start actuators. The 5V operation tolerates typical automotive 12V bus transients when paired with a TVS diode and 5V regulator, while the OTP memory prevents unauthorized firmware reads, providing security against cloning of aftermarket modules.
Recommended
Low-Speed Serial Communication Bridges
The PIC16LCE625-04/P implements asynchronous serial communication via its USART module at standard baud rates up to 38.4 kbaud at 4 MHz, allowing the device to act as a protocol bridge between RS-232, RS-485, and TTL UART peripherals. The 128-byte RAM buffer is sufficient for short message handling, and the hardware USART offloads bit-banging from the CPU, freeing cycles for application logic. Typical use cases include RS-232 to RS-485 converters, sensor hub aggregation, and industrial Modbus RTU slaves.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LCE625-04/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LC625-04/P | PIC16LC622-04/P | PIC16F628A-I/P | PIC16F84A-04/P |
|---|---|---|---|---|---|
| Package | 18-PDIP (through-hole) | 18-PDIP - same | 18-PDIP - same | 18-PDIP - same | 18-PDIP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory Type | OTP (3.5 KB) | OTP 3.5 KB | OTP (lower capacity) | Flash 3.5 KB (rewritable) | Flash 1.75 KB (rewritable) |
| Maximum Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 20 MHz | 4 MHz |
| I/O Pins | 13 | 13 | 13 | 16 | 13 |
| Operating Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 6.0 V |
| Lifecycle Status | NRND | NRND | NRND | Active | Active |
Key Differentiators
- Lowest-cost OTP variant in PIC16C62x family with 3.5 KB program memory (vs PIC16LC622-04/P)
- Pin-compatible upgrade path to Flash memory without PCB rework (vs PIC16F628A-I/P)
- Wide commercial temperature range with extended-temp family variant available (vs PIC16C62x baseline)
Design Notes
Place a 100 nF ceramic decoupling capacitor as close as possible to the VDD pin (pin 14 in 18-PDIP) and a bulk 10 uF tantalum or aluminum electrolytic capacitor on the same supply trace. Brown-out reset configuration bits must be set to a threshold appropriate for the application: BOR at 4.0V for 5V systems or 2.7V for 3.3V systems. Without proper decoupling, the PIC16LCE625 may reset spuriously during relay switching events that cause VDD droop.
OTP (One-Time Programmable) memory cannot be erased or rewritten - a single programming error wastes the device. Engineers should always prototype using the Flash-equivalent PIC16F628A-I/P (same 18-PDIP pinout, 3.5 KB Flash, 20 MHz, 224 bytes RAM, 16 I/O) before committing to PIC16LCE625 OTP volume production. Verify the configuration bits (oscillator selection, watchdog enable, brown-out reset, code protection) match the application before final programming.
The 18-PDIP package (0.300 inch / 7.62 mm row spacing) is through-hole and breadboard-friendly, but for high-vibration environments, solder-pin retention can be improved by adding conformal coating or using a DIP socket with retention clips. Keep the MCLR pin trace short and avoid routing high-frequency signals adjacent to it, as MCLR is sensitive to capacitive coupling that can cause spurious resets. Place the oscillator crystal as close to OSC1/OSC2 as possible and surround it with a ground pour to reduce EMI susceptibility.
Compliance Information
Compliance status not explicitly stated in verified web data. For automotive applications use PIC16LCE625-04E/P (extended temperature -40C to +125C) which is the qualified family variant.
