PIC16LC55A-04I/SO - 8-bit OTP MCU, 4MHz, 768B | Microchip
N.º da peça: PIC16LC55A-04I/SO ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $2.17 | $2,17 |
| 10 | $1.95 | $19,50 |
| 100 | $1.74 | $174,00 |
| 500 | $1.56 | $780,00 |
| 1.000 | $1.4 | $1.400,00 |
PIC16LC55A-04I/SO Visão geral
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripherals around a compact instruction set. Within the broader taxonomy, the PIC16LC55A belongs to the 8-bit MCU category, which itself falls under microcontrollers -> integrated circuits -> semiconductors. Its RISC-style 12-bit-wide instruction set delivers 2:1 code compression relative to competing 8-bit architectures in the same price tier, allowing developers to fit typical embedded control firmware in a few hundred bytes of program memory.
Key features include a 4 MHz oscillator, 12 I/O ports (with 20 total I/O capability), 768-byte one-time-programmable (OTP) EPROM, and a wide 3.0 V to 6.25 V supply voltage range that supports both 3.3 V and 5 V system rails. The CMOS process yields low current draw suitable for battery-powered or always-on appliances, and the static core design eliminates the minimum clock frequency required by many competing dynamic-logic cores.
The architecture combines a 12-bit instruction word with a Harvard bus that separates program and data memory, a 2-level hardware stack, and dedicated timer/counter peripherals. Watchdog timer, power-on reset, and brown-out detection peripherals reduce external component count, and the OTP memory allows last-minute firmware customization during production programming.
Typical applications include low-cost consumer appliances, simple industrial controllers, battery-powered sensor nodes, LED lighting controllers, and remote-control transmitter logic. Designers should pay attention to the OTP programming voltage and ensure the chosen programmer (such as Microchip's PM3) supports the PIC16LC55A. Pin-compatible migration to PIC16F5X flash parts is also worth investigating for prototype iteration. This page synthesizes distributor pricing, same-package drop-in alternatives, and practical design notes beyond what the manufacturer datasheet alone provides.
Alternativas drop-in para PIC16LC55A-04I/SO — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com PIC16LC55A-04I/SO (mesmo formato e footprint) — diferindo em Core Architecture, Package, Program Memory Size, Operating Temperature Range, Program Memory Type.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC16LC55A-04/SO
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC16LC55AT-04I/SO
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC16LC55AT-04/SO
✅ Drop-In✓ Em estoque
$2.21 / unidade
Ver ficha técnica →PIC16C55A-04I/SO
✅ Drop-In✓ Em estoque
$2.05 / unidade
Ver ficha técnica →PIC16LC55A-04I/SO Classificações máximas e características elétricas
| Core Architecture | 8-bit PIC16 RISC |
| Family | PIC16C5X (PIC16LC55A sub-family) |
| Program Memory Size | 768 bytes (512 x 12) OTP EPROM |
| RAM Size | 24 bytes |
| Frequência máxima de clock | 4 MHz |
| Supply Voltage Range | 3.0 V to 6.25 V |
| Number of I/O Pins | 20 |
| I/O Ports | 12 |
| ROM Type | OTP/EPROM |
| Faixa de temperatura de operação | -40 C to +85 C (Industrial) |
| Encapsulamento | 28-pin SOIC (SOIC-28, 0.295 in / 7.50 mm width) |
| Tipo de montagem | Surface Mount |
| Packaging | Tube |
| Instruction Set Width | 12-bit |
| Instruction Set Style | RISC (Harvard) |
| Status RoHS | Compliant |
| Lead-Free | Yes |
| Process Technology | CMOS |
| MSL (Moisture Sensitivity Level) | 1 (unlimited floor life) |
| Manufacturer | Microchip Technology |
Configuração de pinos do PIC16LC55A-04I/SO
| Pino 1 | RA2 — Bidirectional I/O port A bit 2 |
| Pino 2 | RA3 — Bidirectional I/O port A bit 3 |
| Pino 3 | RA4/RTCC — Bidirectional I/O port A bit 4 / RTCC timer clock input |
| Pino 4 | MCLR/Vpp — Master clear (reset, active low) / Programming voltage input |
| Pino 5 | VSS — Ground reference |
| Pino 6 | RB0/INT — Bidirectional I/O port B bit 0 / External interrupt input |
| Pino 7 | RB1 — Bidirectional I/O port B bit 1 |
| Pino 8 | RB2 — Bidirectional I/O port B bit 2 |
| Pino 9 | RB3 — Bidirectional I/O port B bit 3 |
| Pino 10 | RB4 — Bidirectional I/O port B bit 4 |
| Pino 11 | RB5 — Bidirectional I/O port B bit 5 |
| Pino 12 | RB6 — Bidirectional I/O port B bit 6 |
| Pino 13 | RB7 — Bidirectional I/O port B bit 7 |
| Pino 14 | VDD — Positive supply voltage (3.0 V to 6.25 V) |
| Pino 15 | OSC2/CLKOUT — Oscillator output / Clock output (crystal mode) |
| Pino 16 | OSC1/CLKIN — Oscillator input / External clock input |
| Pino 17 | RA0 — Bidirectional I/O port A bit 0 |
| Pino 18 | RA1 — Bidirectional I/O port A bit 1 |
| Pino 19 | RC0 — Bidirectional I/O port C bit 0 |
| Pino 20 | RC1 — Bidirectional I/O port C bit 1 |
| Pino 21 | RC2 — Bidirectional I/O port C bit 2 |
| Pino 22 | RC3 — Bidirectional I/O port C bit 3 |
| Pino 23 | RC4 — Bidirectional I/O port C bit 4 |
| Pino 24 | RC5 — Bidirectional I/O port C bit 5 |
| Pino 25 | RC6 — Bidirectional I/O port C bit 6 |
| Pino 26 | RC7 — Bidirectional I/O port C bit 7 |
| Pino 27 | NC — Not connected (no internal bond) |
| Pino 28 | NC — Not connected (no internal bond) |
Aplicações típicas
PIC16LC55A-04I/SO é adequado para 7 aplicaçãos: Low-Cost Consumer Appliance Control, Battery-Powered Sensor Nodes, LED Lighting Controllers, Remote-Control Transmitter Logic, Simple Industrial Control Modules, Automotive Accessory Controllers, Educational and Hobbyist Projects.
Low-Cost Consumer Appliance Control
The PIC16LC55A-04I/SO suits small kitchen, personal-care, and home appliances that need a compact controller without flash-memory overhead. Its 4 MHz RISC core executes typical thermostat or motor-driver state machines in well under the available instruction budget, while the 3.0-6.25 V supply range allows direct connection to 3.3 V or 5 V power rails. With 768 bytes of OTP, firmware is locked at production programming - a cost advantage over flash parts for high-volume products. The 20 I/O pins are sufficient to drive segment LCDs, keypads, relay logic, and triac interfaces in a single chip.
Recomendado
Battery-Powered Sensor Nodes
The CMOS implementation of the PIC16LC55A draws microamp-level quiescent current, enabling multi-year battery life in remote sensor applications. Combined with the wide 3.0-6.25 V supply range, the part can run from two alkaline cells, a lithium coin cell, or a small solar-harvested rail. The 4 MHz fully-static core lets designers halt the clock entirely during sleep and resume deterministically, while 20 I/O pins interface with low-power sensors, reed switches, and piezoelectric energy harvesters. The OTP program memory keeps per-unit cost low and protects intellectual property.
Recomendado
LED Lighting Controllers
With 20 I/O pins and PWM-capable timer peripherals, the PIC16LC55A-04I/SO handles multi-channel LED drivers, color-mixing logic, and dimming curves in decorative and architectural lighting. The 4 MHz instruction rate and 12-bit-wide RISC core deliver 1 MIPS per MHz, sufficient for smooth 8-bit PWM dimming without flicker. Industrial temperature range ensures reliable operation in enclosed luminaires where ambient can exceed 70 C. The SOIC-28 footprint accommodates hand-soldered prototypes as well as high-volume SMT assembly.
Recomendado
Remote-Control Transmitter Logic
Garage-door openers, ceiling-fan remotes, RF key fobs, and IR controllers all benefit from the PIC16LC55A's small footprint, low cost, and ultra-low quiescent draw. The 24-byte RAM handles button-debounce and rolling-code state buffers, while 768 bytes of OTP accommodates multi-protocol firmware. The wide supply range accepts 2-cell alkaline or single Li-ion chemistries directly. Designers should budget for the OTP programming step during production; migration to PIC16F57-I/SO is recommended for development phases that demand iterative reprogramming.
Recomendado
Simple Industrial Control Modules
The PIC16LC55A-04I/SO is well-suited to discrete I/O modules, small PLC slices, and relay-driver boards operating on industrial 24 V (regulated to 5 V) rails. The -40 C to +85 C industrial temperature rating tolerates cabinet environments, while the 3.0-6.25 V supply range simplifies post-regulation. Twenty I/O pins handle digital inputs, opto-isolated signals, and relay coil drivers; OTP memory prevents accidental field reprogramming. Designers should still add external watchdog and brown-out circuitry for unattended industrial deployments.
Recomendado
Automotive Accessory Controllers
While the PIC16LC55A-04I/SO itself is not AEC-Q100 qualified, the same PIC16LC55A die is used in automotive-grade variants that designers can specify for accessories such as interior lamps, mirror adjusters, and seat controllers. The wide supply range tolerates 12 V automotive transients (post-regulation), and 20 I/O pins accommodate H-bridge enable logic, switch sensing, and diagnostic feedback. OTP locking protects firmware from unauthorized modification, a regulatory plus for vehicle subsystems.
Recomendado
Educational and Hobbyist Projects
The PIC16C5X family remains a staple in microcontroller education because of its simple architecture, public instruction set, and Microchip's free MPLAB X IDE toolchain. The PIC16LC55A-04I/SO offers 768 bytes of OTP for student firmware experiments and breadboard-friendly 28-pin SOIC packaging. Although modern courses favor flash PIC16F parts, the LC55A is an inexpensive way to teach assembly-language programming, OTP memory concepts, and RISC pipeline behavior without the cost of a debug-capable emulator.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC16LC55A-04I/SO — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC16LC55A-04/SO | PIC16LC55AT-04I/SO | PIC16LC55AT-04/SO | PIC16C55A-04I/SO |
|---|---|---|---|---|---|
| Package | SOIC-28 (0.295 in) | SOIC-28 (0.295 in) - same | SOIC-28 (0.295 in) - same | SOIC-28 (0.295 in) - same | SOIC-28 (0.295 in) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Operating Temperature Range | -40 C to +85 C (Industrial) | 0 C to +70 C (Commercial) | -40 C to +85 C (Industrial) | 0 C to +70 C (Commercial) | -40 C to +85 C (Industrial) |
| Supply Voltage Range | 3.0 V to 6.25 V | 3.0 V to 6.25 V | 3.0 V to 6.25 V | 3.0 V to 6.25 V | 4.5 V to 5.5 V (narrower) |
| Maximum Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Program Memory | 768 bytes OTP (512 x 12) | 768 bytes OTP (512 x 12) | 768 bytes OTP (512 x 12) | 768 bytes OTP (512 x 12) | 768 bytes OTP (512 x 12) |
| RAM Size | 24 bytes | 24 bytes | 24 bytes | 24 bytes | 24 bytes |
| I/O Pins | 20 | 20 | 20 | 20 | 20 |
| Packaging | Tube | Tube | Tape & Reel | Tape & Reel | Tube |
Principais diferenciais
- Wide 3.0-6.25 V supply range supports both 3.3 V and 5 V rails (vs PIC16C55A-04I/SO)
- Industrial -40 C to +85 C operating temperature rating (vs PIC16LC55A-04/SO)
- Tube packaging suitable for low-volume and prototype builds (vs PIC16LC55AT-04I/SO)
Notas de projeto
The PIC16LC55A-04I/SO accepts 3.0 V to 6.25 V on VDD (pin 14) and returns current on VSS (pin 5). Place a 100 nF decoupling capacitor within 5 mm of VDD and a 10 uF bulk capacitor at the supply entry point. For battery-powered designs, add a 100 kohm pull-up on MCLR/Vpp (pin 4) to ensure defined reset state at power-up. Brown-out reset behavior should be verified against the application minimum VDD to avoid code execution at marginal voltages.
Use a 28-pin SOIC land pattern with 1.27 mm pitch and 7.50 mm body width (JEDEC MS-013). Provide continuous ground and power planes under the MCU with vias placed at the thermal pad equivalent area to improve heat dissipation (although power dissipation is low at 4 MHz). Route the OSC1/OSC2 traces as short, symmetric stubs to the crystal or resonator; keep them away from high-current switching nodes to avoid injecting clock noise into the core.
PIC16C5X family devices do not include a flash-based debug interface - code development requires an OTP-compatible programmer such as Microchip's MPLAB PM3 or a third-party ProMate-compatible tool. The OTP memory cannot be erased after programming, so production programmers should verify checksum and signature at the end of each programming cycle. Designers migrating firmware from PIC16F57 (flash) must verify that bit-for-bit instructions and interrupt behavior match the PIC16C5X silicon.
Group the 20 I/O pins along the PCB edges nearest their respective connectors to minimize trace crossings. Keep RC0-RC7 (pins 19-26) traces short if used for high-speed signaling, since these pins share the same internal bus. Reserve pin 4 (MCLR/Vpp) for a dedicated reset circuit that includes a 10 kohm pull-up to VDD and an optional push-button to ground - never drive MCLR above VDD + 0.3 V or permanent damage may occur.
Informações de conformidade
RoHS and REACH compliant per Microchip product documentation. The 'I' suffix indicates industrial temperature range (-40 C to +85 C). AEC-Q100 qualification is not applicable for this part; automotive customers should source a separately qualified variant from Microchip. Lead-free and halogen-free confirmed by Microchip material declarations.
