PIC16LC63-04/SO - 8-bit PIC MCU 7KB OTP 4MHz 28-SOIC | Microchip
MPN: PIC16LC63-04/SO ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.45 | $7.45 |
| 10 | $6.85 | $68.50 |
| 100 | $6.1 | $610.00 |
| 500 | $5.4 | $2,700.00 |
| 1,000 | $4.75 | $4,750.00 |
PIC16LC63-04/SO Overview
What is a PIC16C-family microcontroller? The PIC16CXX is a family of low-cost, high-performance, CMOS, fully-static, 8-bit microcontrollers built around a RISC (Reduced Instruction Set Computing) core. With only 35 single-word instructions to learn and a single-cycle execution architecture (except program branches, which take two cycles), the PIC16 architecture became an industry-standard baseline for embedded control. The PIC16LC63 sits in the mid-range PIC16 family and integrates program memory, data RAM, peripherals, and CPU on a single die - the same architectural category as modern PIC16F1xxx enhanced mid-range devices, but in the original C-series silicon with EPROM/OTP program memory.
Key features include 22 general-purpose digital I/O pins, 3 timer modules, a 10-bit multi-channel Analog-to-Digital Converter (ADC), and serial communication peripherals including USART (asynchronous/synchronous), SSP (I2C/SPI) and a parallel slave port. The device operates from 2.5 V to 5.5 V (commercial 'LC' low-voltage variant), supports 4 MHz maximum clock input, and integrates power-on reset, brown-out reset, watchdog timer with its own on-chip RC oscillator, and in-circuit serial programming (ICSP). The 28-pin SOIC wide-body package enables hand-solderable prototypes and standardized PCB footprints for industrial and consumer embedded designs.
Architecturally, the PIC16LC63-04/SO uses a Harvard bus architecture with separate program and data memories, a 14-bit wide instruction word, and an 8-bit data path. The 'LC' suffix denotes the low-voltage CMOS process optimized for 3.3 V operation, while the '-04' speed grade indicates a 4 MHz maximum oscillator input. The 192-byte data RAM supports register banking across 4 banks, providing rapid context save/restore for interrupt service routines.
Typical applications include industrial automation control, consumer electronics user interfaces, automotive body and HVAC subsystems, sensor signal conditioning nodes, low-power remote sensor terminals, and small-format human-machine interface (HMI) panels. The wide operating voltage range, integrated ADC, and USART make it well-suited for battery-backed sensor hubs and serial-bridge converters.
When designing with this device, budget code space carefully: the 7 KB (4K x 14) OTP memory is one-time programmable, so firmware must be fully debugged in EPROM-window or flash-emulation parts before committing to OTP. The 28-pin SOIC wide package has generous pin pitch (1.27 mm), simplifying rework and breadboarding versus SSOP or QFN variants.
This page synthesizes distributor stock, parametric comparison tables, and practical design notes not found in the manufacturer datasheet - including drop-in alternatives and side-by-side specification differences versus the PIC16C63A, PIC16LC63A and PIC16F73 families.
Drop-in alternatives for PIC16LC63-04/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 PIC16LC63-04/SO (same form factor and footprint) — differing in Package, Program Memory Size, Operating Temperature, Program Memory Type, RAM Size.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LC63A-04/SO
✅ Drop-In✓ In Stock
$4.61 / Unit
View Datasheet →PIC16C63-04/SO
✅ Drop-In✓ In Stock
$5.57 / Unit
View Datasheet →PIC16LC63-04I/SO
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.8 / Unit
View Datasheet →PIC16LC62B-04I/SO
✅ Drop-In✓ In Stock
$3.2 / Unit
View Datasheet →PIC16F73-I/SO
✅ Drop-In✓ In Stock
$2.45 / Unit
View Datasheet →PIC16LC63-04/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16 (8-bit RISC, Harvard) |
| Family | PIC16C / PIC16LC mid-range |
| Program Memory Type | OTP (One-Time Programmable) EPROM |
| Program Memory Size | 7 KB (4K x 14 words) |
| Data RAM | 192 bytes |
| Maximum CPU Clock | 4 MHz |
| Supply Voltage (Vdd) | 2.5 V to 5.5 V |
| I/O Pins | 22 |
| ADC | 10-bit, multi-channel |
| Timers | 3 (Timer0, Timer1, Timer2) |
| Serial Communication | USART (SCI), SSP (I2C/SPI), Parallel Slave Port |
| Package | 28-pin SOIC wide (SO), tube |
| Operating Temperature | 0C to +70C (Commercial) |
| Instruction Set | 35 single-word instructions |
| Instruction Cycle | Single cycle (branches: 2 cycles) |
| Watchdog Timer | Yes, with dedicated on-chip RC oscillator |
| In-Circuit Programming | Yes (ICSP) |
| Power-On Reset / Brown-Out Reset | Yes / Yes |
| Speed Grade | -04 (4 MHz) |
PIC16LC63-04/SO Pin Configuration
| Pin 1 | RA0/AN0 — PORTA bit 0 / ADC input 0 |
| Pin 2 | RA1/AN1 — PORTA bit 1 / ADC input 1 |
| Pin 3 | RA2/AN2 — PORTA bit 2 / ADC input 2 |
| Pin 4 | RA3/AN3/Vref — PORTA bit 3 / ADC input 3 / ADC reference |
| Pin 5 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 6 | RA5/SS/AN4 — PORTA bit 5 / SSP slave select / ADC input 4 |
| Pin 7 | MCLR/Vpp — Master clear reset / programming voltage input |
| Pin 8 | OSC1/CLKIN — Crystal oscillator input / external clock in |
| Pin 9 | OSC2/CLKOUT — Crystal oscillator output / clock out |
| Pin 10 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pin 11 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 module |
| Pin 12 | RC2/CCP1 — PORTC bit 2 / CCP1 module (PWM/capture/compare) |
| Pin 13 | RC3/SCK/SCL — PORTC bit 3 / SSP SPI clock / I2C clock |
| Pin 14 | RC4/SDI/SDA — PORTC bit 4 / SSP SPI data in / I2C data |
| Pin 15 | RC5/SDO — PORTC bit 5 / SSP SPI data out |
| Pin 16 | RC6/TX/CK — PORTC bit 6 / USART async transmit / sync clock |
| Pin 17 | RC7/RX/DT — PORTC bit 7 / USART async receive / sync data |
| Pin 18 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port data bit 0 |
| Pin 19 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port data bit 1 |
| Pin 20 | Vss — Ground reference |
| Pin 21 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port data bit 2 |
| Pin 22 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port data bit 3 |
| Pin 23 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port data bit 4 |
| Pin 24 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port data bit 5 |
| Pin 25 | RD6/PSP6 — PORTD bit 6 / Parallel Slave Port data bit 6 |
| Pin 26 | RD7/PSP7 — PORTD bit 7 / Parallel Slave Port data bit 7 |
| Pin 27 | Vdd — Positive supply voltage (2.5 V - 5.5 V) |
| Pin 28 | RB0/INT — PORTB bit 0 / external interrupt input |
Typical Applications
PIC16LC63-04/SO is suitable for 6 applications: Industrial Automation Controller, Consumer Electronics User Interface, Automotive Body and HVAC Subsystem, Low-Power Remote Sensor Terminal, Serial-Bridge Protocol Converter, Compact HMI Control Panel.
Industrial Automation Controller
The PIC16LC63-04/SO's 7 KB OTP program memory, 22 digital I/O lines, and 10-bit multi-channel ADC make it well suited to industrial automation controllers driving PLC-style ladder-logic emulation or sensor-aggregation nodes. Its 4 MIPS throughput at 4 MHz is adequate for deterministic control loops with cycle times in the 1-10 ms range, while the integrated USART enables reliable RS-232/RS-485 communication with supervisory HMIs. The wide 2.5-5.5 V supply range allows direct connection to both 24 V-derived 5 V rails and 3.3 V logic without level shifters, simplifying mixed-voltage backplane designs.
Recommended
Consumer Electronics User Interface
The PIC16LC63-04/SO powers mid-tier consumer electronics user interfaces by combining a 10-bit ADC for keypad or resistive-touch scanning, the SSP peripheral for I2C/SPI expansion (display drivers, LED controllers), and 22 I/O lines for matrix keypads and indicator LEDs. The 4 MHz clock supports responsive debounced scanning of 4x4 keypads within 10 ms while leaving headroom for housekeeping tasks. Operating from 2.5-5.5 V allows direct battery or USB-rail connection in portable devices, and the 28-SOIC wide package simplifies hand-solder rework during prototype bring-up.
Recommended
Automotive Body and HVAC Subsystem
The PIC16LC63-04/SO fits automotive body-electronics and HVAC subsystems where its 10-bit ADC samples thermistor or potentiometer inputs, its USART bridges to dashboard controllers, and its PWM-capable timers drive small fan motors or lighting dimmers. The commercial 0C to +70C operating range covers cabin environments but not under-hood conditions; for under-hood designs migrate to PIC16F73-I/SO (industrial -40C to +85C) or PIC18F equivalents. The OTP program memory locks firmware at production, which is desirable for anti-tamper body-control modules. Wide 2.5-5.5 V supply tolerates 12 V battery drops during cold-crank.
Recommended
Low-Power Remote Sensor Terminal
Battery-powered remote sensor terminals benefit from the PIC16LC63-04/SO's wide 2.5-5.5 V supply range, integrated 10-bit ADC for environmental telemetry, and USART for low-duty-cycle radio module interfaces. Sleep-mode current and watchdog timer with dedicated RC oscillator enable unattended months-long deployments on two AA cells when paired with a micropower sensor front-end. The 192-byte RAM accommodates small protocol stacks such as Modbus-RTU framing, and the 7 KB OTP memory stores calibration constants and communication logic. The 28-SOIC wide package is field-replaceable for service technicians.
Recommended
Serial-Bridge Protocol Converter
The PIC16LC63-04/SO serves as a serial-bridge converter (RS-232 to I2C/SPI, or USART to parallel-slave-port) by leveraging its independent USART and SSP peripherals running simultaneously. At 4 MHz the CPU has ample bandwidth to buffer traffic, perform protocol translation, and forward frames between buses at rates up to 115.2 kbps without loss. The 22 I/O pins provide handshake and flow-control signals. Industrial users deploy these bridges to integrate legacy serial-only instruments into modern I2C-controlled systems, and the wide 2.5-5.5 V supply accommodates both legacy 5 V and modern 3.3 V sides without external level shifters.
Recommended
Compact HMI Control Panel
The PIC16LC63-04/SO is a strong fit for compact human-machine interface panels (appliance controls, instrument front panels, simple kiosks) where it scans keypads, drives character LCDs via I2C expanders, and reports status through its USART to a host controller. Its 22 I/O lines support a 4x4 matrix keypad plus four LED indicators plus an I2C/SPI display bus without external glue logic. The 10-bit ADC reads potentiometer setpoints (volume, temperature), while the 4 MHz clock keeps response times under 50 ms for tactile feel. The 28-SOIC wide-body package is hand-solderable for prototype iterations.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LC63-04/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LC63A-04/SO | PIC16C63-04/SO | PIC16LC63-04I/SO | PIC16LC62B-04I/SO | PIC16F73-I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (SO, wide-body) | 28-SOIC (SO, wide-body) - same | 28-SOIC (SO, wide-body) - same | 28-SOIC (SO, wide-body) - same | 28-SOIC (SO, wide-body) - same | 28-SOIC (SO, wide-body) - same |
| Program Memory | 7 KB OTP (4K x 14) | 7 KB OTP (4K x 14) | 7 KB OTP (4K x 14) | 7 KB OTP (4K x 14) | 3.5 KB OTP (2K x 14) - 50% smaller | 7 KB Flash (reprogrammable) |
| Data RAM | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 128 bytes | 192 bytes |
| Maximum Clock | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz |
| Supply Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 3.0 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 |
| Operating Temperature | 0C to +70C (Commercial) | 0C to +70C (Commercial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| I/O Pins | 22 | 22 | 22 | 22 | 22 | 22 |
| Memory Type | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | Flash (reprogrammable) |
| ADC | 10-bit, 5 channels | 10-bit, 5 channels | 10-bit, 5 channels | 10-bit, 5 channels | 10-bit, 5 channels | 10-bit, 5 channels |
Key Differentiators
- Low-voltage 2.5 V operation extends battery-powered applications (vs PIC16C63-04/SO)
- Reprogrammable flash memory simplifies development and field updates (vs PIC16F73-I/SO)
- Original C-series silicon with broad industry knowledge base (vs PIC16LC62B-04I/SO)
- Industrial temperature variant available with identical pinout (vs PIC16LC63-04I/SO)
Design Notes
PIC16LC63-04/SO uses One-Time Programmable (OTP) EPROM memory. Once a blank device is programmed, the firmware cannot be erased or modified. Always validate your firmware on a UV-erasable windowed sample (PIC16LC63-04/JW) or migrate to the flash-based PIC16F73-I/SO for development and field updates. Programming should be performed in-circuit via ICSP with Vpp=13.5 V applied to the MCLR pin, observing Microchip's recommended in-circuit serial programming algorithm.
The PIC16LC63-04/SO requires a clean, regulated Vdd supply in the 2.5-5.5 V range. Place a 100 nF decoupling capacitor as close as possible to the Vdd pin (pin 27) plus a bulk 10 uF electrolytic at the board's power-entry point. For battery-powered designs, use a low-dropout regulator such as MCP1700 to maintain stable operation as battery voltage falls below 3 V. The brown-out reset (BOR) module should be enabled in configuration bits to prevent code runaway during voltage droops.
Place the 28-SOIC wide-body footprint on a board with 1.27 mm (50 mil) pin pitch - the SOIC-28 wide package. The exposed pad is not present on this package; thermal dissipation relies solely on the 28 gull-wing leads, so copper-pour on Vdd and Vss traces improves both power delivery and thermal performance. Keep the 4 MHz crystal traces (OSC1/OSC2 pins 8-9) short and shield them from high-current switching signals. For EMI-sensitive applications, place a ground guard ring around the oscillator section.
Allocate dedicated I/O banks for analog and digital signals. Pins RA0-RA5 (pins 1-6) support both digital I/O and analog ADC inputs; configure unused ADC channels as digital outputs to minimize ADC switching noise. The Parallel Slave Port (RD0-RD7, pins 18-19 and 21-26) is multiplexed with PORTD; disable PSP in firmware when not used to free those pins for general I/O. The MCLR pin (pin 7) requires a 10 kohm pull-up to Vdd; do not leave it floating or the device will randomly reset.
Compliance Information
PIC16LC63-04/SO is a legacy OTP EPROM device released before modern RoHS/REACH compliance was standardized. RoHS/REACH/lead-free status not explicitly confirmed in the provided Verified Web Data - check with Microchip directly for current compliance documentation. Not AEC-Q100 qualified; for automotive applications choose AEC-Q100-grade PIC16F or PIC18 families.
