PIC16LC63-04I/SO - 8-Bit 4MHz PIC MCU 7KB OTP 28-SOIC | Microchip
MPN: PIC16LC63-04I/SO ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.56 | $3.56 |
| 10 | $3.35 | $33.50 |
| 100 | $3.12 | $312.00 |
| 500 | $2.95 | $1,475.00 |
| 1,000 | $2.8 | $2,800.00 |
PIC16LC63-04I/SO Overview
An 8-bit microcontroller (MCU) is a single-chip computer built around a compact CPU with byte-wide data paths, on-chip program memory, RAM, and configurable peripherals. The PIC architecture belongs to the RISC (Reduced Instruction Set Computer) family, where a small, fixed-length instruction set simplifies decoder hardware and enables deterministic instruction timing. Within Microchip's portfolio, the PIC16LC63 sits in the PIC16 mid-range tier, between PIC12/PIC14 baseline parts and PIC18 enhanced parts. The 'LC' suffix indicates a low-voltage CMOS variant (2.5V-5.5V operation), and '04I' specifies the 4 MHz speed grade and industrial temp grade. Common hierarchies: 8-bit MCU -> PIC16 family -> mid-range -> RISC -> microcontroller -> embedded computing.
Key features include a Harvard-verifiable architecture with separate program and data buses, 14-bit wide instructions, 8-level hardware stack, integrated analog and digital peripherals, and power-saving SLEEP mode. The 'LC' low-voltage CMOS process delivers low active and standby current consumption suitable for battery-powered and portable designs, while 22 digital I/O pins support multiple communication interfaces including USART, SPI, and I2C for sensor and peripheral integration.
Typical applications include industrial control panels, sensor interface boards, low-power data loggers, automotive body controllers (non-safety), appliance control modules, and embedded system prototyping. The 4 MHz speed and 7KB OTP memory fit well in applications requiring deterministic real-time response with modest memory footprints.
When designing with this device, note that OTP memory is field-programmable but not erasable, making code revision impossible in-circuit. Engineers should develop on flash-based PIC siblings (PIC16F63) and migrate to OTP only after firmware is fully validated for production. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
The PIC16LC63 is fully static CMOS, providing low power consumption across the full operating voltage range. Its deterministic instruction timing makes it well-suited for hard real-time control loops in industrial and embedded systems.
Drop-in alternatives for PIC16LC63-04I/SO — 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 PIC16LC63-04I/SO (same form factor and footprint) — differing in Package, Program Memory Type, Operating Temperature, Program Memory Size, Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LC63A-04I/SO
✅ Drop-In✓ In Stock
$4.2 / Unit
View Datasheet →PIC16LC63-04/SO
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$4.75 / Unit
View Datasheet →PIC16LC63T-04I/SO
✅ Drop-In✓ In Stock
$5.05 / Unit
View Datasheet →PIC16F63-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F73-I/SO
✅ Drop-In✓ In Stock
$2.45 / Unit
View Datasheet →PIC16LC63-04I/SO Maximum Ratings & Electrical Characteristics
| Manufacturer | Microchip Technology |
| Series | PIC16C |
| Core | PIC16 8-bit RISC |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 7 KB (4K x 14) |
| RAM Size | 192 B |
| I/O Pins | 22 |
| Clock Frequency | 4 MHz |
| Instruction Cycle Time | 200 ns |
| Operating Voltage | 3.3 V / 5 V (2.5 V - 5.5 V range) |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 28-pin SOIC Wide (SO W) |
| Mounting Type | Surface Mount |
| Tube Quantity | 27 per tube (per FindIC datasheet snippet) |
| Lifecycle Status | Obsolete |
PIC16LC63-04I/SO Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input |
| Pin 2 | RA0 — Port A bit 0 (digital I/O / analog AN0) |
| Pin 3 | RA1 — Port A bit 1 (digital I/O / analog AN1) |
| Pin 4 | RA2 — Port A bit 2 (digital I/O / analog AN2) |
| Pin 5 | RA3 — Port A bit 3 (digital I/O / analog AN3 / Vref+) |
| Pin 6 | RA4 — Port A bit 4 (digital I/O / analog AN4 / T0CKI) |
| Pin 7 | RA5 — Port A bit 5 (digital I/O / analog AN5 / SS) |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1 — Oscillator input / external clock |
| Pin 10 | OSC2 — Oscillator output |
| Pin 11 | RC0 — Port C bit 0 (digital I/O / T1OSO) |
| Pin 12 | RC1 — Port C bit 1 (digital I/O / T1OSI / CCP2) |
| Pin 13 | RC2 — Port C bit 2 (digital I/O / CCP1) |
| Pin 14 | RC3 — Port C bit 3 (digital I/O / SCL) |
| Pin 15 | RC4 — Port C bit 4 (digital I/O / SDA) |
| Pin 16 | RC5 — Port C bit 5 (digital I/O / SDO) |
| Pin 17 | RC6 — Port C bit 6 (digital I/O / TX / CK) |
| Pin 18 | RC7 — Port C bit 7 (digital I/O / RX / DT) |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply voltage |
| Pin 21 | RB0 — Port B bit 0 (digital I/O / INT) |
| Pin 22 | RB1 — Port B bit 1 (digital I/O) |
| Pin 23 | RB2 — Port B bit 2 (digital I/O) |
| Pin 24 | RB3 — Port B bit 3 (digital I/O) |
| Pin 25 | RB4 — Port B bit 4 (digital I/O) |
| Pin 26 | RB5 — Port B bit 5 (digital I/O) |
| Pin 27 | RB6 — Port B bit 6 (digital I/O / PGC) |
| Pin 28 | RB7 — Port B bit 7 (digital I/O / PGD) |
Typical Applications
PIC16LC63-04I/SO is suitable for 7 applications: Industrial Control Panel Logic, Sensor Interface and Data Logger Module, Appliance Control Module, Automotive Body Electronics (Non-Safety), Embedded Prototyping and Educational Platforms, Low-Power Portable Instrumentation, Communication Protocol Bridge.
Industrial Control Panel Logic
The PIC16LC63-04I/SO fits industrial control panel applications where deterministic 4 MHz instruction execution and 22 digital I/O pins drive relay control, switch debouncing, and indicator LED multiplexing. Its 192-byte RAM supports small state-machine logic for HMI buttons and status monitoring. The industrial temperature grade (-40C to +85C) tolerates factory floor thermal swings. With 3.3V/5V operating voltage, the MCU interfaces directly to TTL logic and 5V relay drivers without level shifters. OTP memory locks firmware against field tampering in installed equipment.
Recommended
Sensor Interface and Data Logger Module
For sensor interface boards and small data loggers, the PIC16LC63-04I/SO's 4 MHz clock and 7KB OTP memory handle periodic ADC sampling, threshold detection, and UART telemetry to a parent logger. The 22 I/O pins accommodate multiple analog sensors via the ADC and digital sensors via SPI or I2C. Low-voltage CMOS operation (2.5V-5.5V) supports battery-powered field deployments. The deterministic instruction cycle is required for time-stamped sensor reads and synchronized logging intervals.
Recommended
Appliance Control Module
White goods and small appliance control modules (coffee machines, washing machines, microwave user interfaces) commonly use PIC16LC63-04I/SO because OTP memory locks validated firmware, preventing field code corruption. The MCU's 22 I/O pins drive seven-segment displays, keypad scanning, triac-fired heater control, and motor PWM. Industrial temperature rating tolerates enclosed appliance thermal rise. RISC architecture delivers predictable response to button presses and timer interrupts essential for safety-critical appliance state machines.
Recommended
Automotive Body Electronics (Non-Safety)
Non-safety automotive body modules (interior lighting controllers, seat position memory, mirror adjusters) historically used PIC16LC63-04I/SO thanks to industrial temperature tolerance, 5V operation matching automotive 12V-derived rails, and OTP cost efficiency at production volumes. The 22 I/O pins drive LED drivers, H-bridge motor controls, and switch inputs. Engineers must verify AEC-Q100 compliance for new automotive designs; the PIC16LC63-04I/SO does not carry automotive qualification, so the PIC16F63 or PIC16F73 family is preferred.
Recommended
Embedded Prototyping and Educational Platforms
Hobbyists, students, and engineering training programs use the PIC16LC63-04I/SO footprint as a learning platform because the PIC16 mid-range architecture is well-documented with extensive example code and Microchip application notes. The 28-SOIC package is breadboard-friendly with SOIC-to-DIP adapter boards. The 7KB OTP memory enforces disciplined firmware design because developers must plan code revision carefully. For active learning where firmware is iterated frequently, the flash-based PIC16F63-I/SO is more practical.
Recommended
Low-Power Portable Instrumentation
Portable measurement instruments (handheld multimeters, environmental meters, simple oscilloscope probes) benefit from the PIC16LC63-04I/SO's low-voltage CMOS operation and SLEEP-mode power savings. At 3.3V supply, active current stays low enough to run from coin-cell or AA battery stacks. The 4 MHz clock is sufficient for measurement acquisition and LCD driver bit-banging. Industrial temperature rating supports outdoor and laboratory environments. OTP memory prevents accidental field firmware loss from power glitches.
Recommended
Communication Protocol Bridge
The PIC16LC63-04I/SO's integrated USART, SPI, and I2C peripherals enable it to act as a protocol bridge between incompatible sensor buses in industrial and embedded systems. For example, it can convert SPI sensor data to a UART stream for a host controller, or aggregate I2C sensor readings into a higher-level Modbus output. The 4 MHz clock is adequate for low-to-medium baud rate conversions. OTP memory locks the bridge firmware so production units cannot be reprogrammed in the field.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LC63-04I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LC63A-04I/SO | PIC16LC63-04/SO | PIC16LC63T-04I/SO | PIC16F63-I/SO | PIC16F73-I/SO |
|---|---|---|---|---|---|---|
| Package | 28-SOIC (SO W) | 28-SOIC (SO W) - same | 28-SOIC (SO W) - same | 28-SOIC (SO W) - same | 28-SOIC (SO W) - same | 28-SOIC (SO W) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Architecture | PIC16 8-bit RISC | PIC16 8-bit RISC | PIC16 8-bit RISC | PIC16 8-bit RISC | PIC16 8-bit RISC | PIC16 8-bit RISC |
| Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 5 MHz |
| Program Memory | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB Flash | 7 KB Flash |
| RAM | 192 B | 192 B | 192 B | 192 B | 192 B | 192 B |
| I/O Pins | 22 | 22 | 22 | 22 | 22 | 22 |
| Operating Voltage | 2.5V - 5.5V | 2.5V - 5.5V | 2.5V - 5.5V | 2.5V - 5.5V | 2.0V - 5.5V | 2.0V - 5.5V |
| Temperature Grade | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Commercial (0C to +70C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) |
| Memory Type | OTP (one-time programmable) | OTP | OTP | OTP | Flash (re-programmable) | Flash (re-programmable) |
Key Differentiators
- Industrial temperature grade with low-voltage CMOS operation (vs PIC16LC63-04/SO)
- Drop-in identical silicon with bug fixes (vs PIC16LC63A-04I/SO)
- Re-programmable flash memory for iterative development (vs PIC16F63-I/SO)
Design Notes
The PIC16LC63-04I/SO uses OTP (One-Time Programmable) memory, meaning firmware can only be written once - after programming, the code is permanent and cannot be erased or rewritten. Always develop and validate firmware on the flash-based PIC16F63-I/SO equivalent first, then commit to OTP for production. Attempting to program a misconfigured OTP device wastes inventory; verify all configuration bits (oscillator, watchdog, code protect, brown-out) before programming.
The PIC16LC63-04I/SO operates from 2.5V to 5.5V ('LC' low-voltage CMOS variant). At 4 MHz with all peripherals active, current consumption stays in the low milliamp range; SLEEP mode drops current to microamp levels suitable for battery-backed designs. Decouple VDD with a 100 nF ceramic capacitor as close to pin 20 as possible, plus a bulk 10 uF tantalum or aluminum electrolytic on the supply rail to suppress voltage transients during high-current GPIO switching.
Place the external crystal or resonator as close to OSC1 (pin 9) and OSC2 (pin 10) as possible, keeping trace lengths under 5 mm to minimize parasitic capacitance. Route the MCLR reset line (pin 1) away from high-frequency switching signals to avoid spurious resets; if MCLR is not used, tie it directly to VDD through a 10 kohm pull-up. Keep analog inputs (RA0-RA5) physically separated from digital switching traces to reduce ADC noise coupling.
The PIC16LC63-04I/SO has very low active power dissipation (typically under 50 mW at 4 MHz/5V) so the 28-SOIC package requires no heatsink or special thermal relief. However, ensure the PCB copper pour provides a low-thermal-resistance path for the exposed paddle region if present, and that ambient temperature stays within the -40C to +85C industrial range. For enclosed appliance applications, derate maximum operating temperature by 10C to account for self-heating.
Compliance Information
Lifecycle status obsolete per distributor data as of 2026-09-22. Compliance certifications not explicitly stated in verified web data; set to unknown per data authenticity rules. PIC16LC63-04I/SO is not AEC-Q100 qualified.
