PIC16C56T-LP/SO - 8-bit OTP MCU, 40MHz, 1.5KB EPROM, SOIC-18
N.º da peça: PIC16C56T-LP/SO ✗ Fim de vida| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $2.95 | $2,95 |
| 10 | $2.66 | $26,60 |
| 100 | $2.37 | $237,00 |
| 500 | $2.13 | $1.065,00 |
| 1.000 | $1.89 | $1.890,00 |
PIC16C56T-LP/SO Visão geral
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable I/O peripherals, enabling embedded control in everything from appliances to industrial equipment. Within the broader semiconductor taxonomy, an MCU belongs to the integrated circuits (IC) family, then to microcontrollers specifically, and finally to the 8-bit RISC sub-category represented by the PIC16C5X architecture. The PIC16C56T-LP/SO embodies the classic baseline PIC architecture that established Microchip's dominance in low-pin-count embedded control.
Key features include a 12-bit instruction word providing 2:1 code compression over competing 8-bit MCUs, 12 bidirectional digital I/O pins, a Power-on Reset (POR) circuit, and a Watchdog Timer (WDT) for reliable operation in noisy or unattended environments. The device operates from a 3.0V to 6.0V supply and supports oscillator configurations including RC, LP (low-power crystal), XT, and HS (high-speed crystal), selectable at runtime. The -LP suffix designates the Low-Power crystal oscillator mode optimized for 32.768 kHz or low-frequency watch crystals, drastically reducing supply current versus HS mode.
The PIC16C56T-LP/SO uses a Harvard architecture with separate program and data buses, a 2-stage pipeline, and a fixed instruction set that completes most operations in a single 200ns instruction cycle at 20MHz. Its OTP EPROM allows user-programmable firmware that is mask-free, making it ideal for low-to-medium volume production. The T-suffix variant ships on Tape & Reel for high-volume surface-mount assembly.
Typical applications include low-power battery-operated products, appliance controllers, security peripherals, remote keyless entry transmitters, smart sensors, and simple timer or state-machine replacement circuits. The 12 I/O pins and minimal external component count make it well-suited for cost-sensitive and space-constrained designs.
When designing with the PIC16C56T-LP/SO, choose the LP oscillator mode for sub-1MHz clock frequencies where current consumption must be minimized, and ensure POR is enabled in the configuration word for reliable cold-start behavior. The OTP EPROM cannot be re-programmed in-circuit, so development should begin with a windowed CERDIP PIC16C56JW or a flash-based PIC16F equivalent before committing to the OTP version for production.
This page synthesizes distributor pricing, drop-in PIC16C5X family alternatives, and practical design notes that complement the manufacturer datasheet's parametric focus.
Alternativas drop-in para PIC16C56T-LP/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 PIC16C56T-LP/SO (mesmo formato e footprint) — diferindo em Package, Core Architecture, Oscillator Type, RoHS Status, Operating Temperature.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC16C56-LPI/SO
✅ Drop-In✓ Em estoque
$1.31 / unidade
Ver ficha técnica →PIC16C56-LP/SO
✅ Drop-In✓ Em estoque
$1.82 / unidade
Ver ficha técnica →PIC16C56-LPE/SO
✅ Drop-In✓ Em estoque
$2.18 / unidade
Ver ficha técnica →PIC16C56T-HSI/SO
✅ Drop-In✓ Em estoque
$1.78 / unidade
Ver ficha técnica →PIC16C56-RCI/SO
✅ Drop-In✓ Em estoque
$0.99 / unidade
Ver ficha técnica →PIC16C56T-LP/SO Classificações máximas e características elétricas
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Program Memory | 1.5 KB OTP EPROM (1K x 12) |
| Data RAM | 25 bytes |
| Frequência máxima de clock | 40 MHz |
| Instruction Word Width | 12 bits |
| I/O Pins | 12 |
| Supply Voltage Range | 3.0 V to 6.0 V |
| Oscillator Mode | LP (Low-Power Crystal) |
| Encapsulamento | 18-pin SOIC (SO, 7.5 mm body width) |
| Peripherals | POR, WDT |
| Faixa de temperatura de operação | 0C to +70C (Commercial) |
| Instruction Cycle Time | 200 ns at 20 MHz (4-clock) |
| Tipo de montagem | Surface Mount |
| Nível MSL | 1 (unlimited) |
Configuração de pinos do PIC16C56T-LP/SO
| Pino 1 | RA2/AN2 — Bidirectional I/O, also analog input 2 |
| Pino 2 | RA3/AN3 — Bidirectional I/O, also analog input 3 |
| Pino 3 | RA4/T0CKI — Bidirectional I/O, also Timer0 clock input |
| Pino 4 | MCLR — Master Clear (reset) input, active low |
| Pino 5 | VSS — Ground reference |
| Pino 6 | RB0/INT — Bidirectional I/O, also external interrupt input |
| Pino 7 | RB1 — Bidirectional I/O |
| Pino 8 | RB2 — Bidirectional I/O |
| Pino 9 | RB3 — Bidirectional I/O |
| Pino 10 | RB4 — Bidirectional I/O |
| Pino 11 | RB5 — Bidirectional I/O |
| Pino 12 | RB6 — Bidirectional I/O |
| Pino 13 | RB7 — Bidirectional I/O |
| Pino 14 | VDD — Positive supply voltage (3.0V to 6.0V) |
| Pino 15 | OSC2/CLKOUT — Oscillator crystal output or clock output |
| Pino 16 | OSC1/CLKIN — Oscillator crystal input or external clock input |
| Pino 17 | RA0/AN0 — Bidirectional I/O, also analog input 0 |
| Pino 18 | RA1/AN1 — Bidirectional I/O, also analog input 1 |
Aplicações típicas
PIC16C56T-LP/SO é adequado para 6 aplicaçãos: Remote Keyless Entry (RKE) Transmitters, Battery-Operated Wireless Sensor Nodes, Appliance Control Boards, Security Keypad and Access Controllers, Simple Timer and State-Machine Replacement, Consumer Electronics IR Remote Controls.
Remote Keyless Entry (RKE) Transmitters
The PIC16C56T-LP/SO is widely used in automotive Remote Keyless Entry transmitter modules where a 32.768 kHz crystal combined with the LP oscillator mode delivers the lowest possible quiescent current during standby, enabling multi-year battery life from a single CR2032 cell. Its 1.5 KB OTP program memory is sufficient to encode rolling-code or fixed-code encryption algorithms plus button-debounce and LED-feedback state machines. The 12 bidirectional I/O pins can directly drive the SAW-resonator-based RF transmitter, the four button-sense inputs, and the transmit-indicator LED without external logic. The 3.0V minimum supply voltage matches CR2032 coin-cell end-of-life voltage, maximizing usable capacity before the user must replace the battery. Power-on Reset and Watchdog Timer together protect against low-voltage brown-out and code runaway in noisy RF environments.
Recomendado
Battery-Operated Wireless Sensor Nodes
In low-power wireless sensor applications such as utility metering, environmental monitoring, and security peripherals, the PIC16C56T-LP/SO provides the brain of the sensor node while consuming less than 1 mA active current at 32.768 kHz. Its sleep current of typically under 1 microamp, combined with periodic wake-up via Watchdog Timer overflow, makes it ideal for duty-cycled sensor reporting. The 12 I/O pins can interface directly to SPI temperature sensors, piezo buzzers, reed switches, and 433 MHz or 315 MHz OOK/ASK transmitters. The 1.5 KB OTP holds sensor-conditioning algorithms and simple encryption routines. The 18-pin SOIC package keeps the PCB footprint under 100 mm² when paired with a single coin-cell holder, making it suitable for compact sensor enclosures.
Recomendado
Appliance Control Boards
White-goods appliance control boards such as those found in washing machines, microwave ovens, and dishwashers leverage the PIC16C56T-LP/SO for simple state-machine control of relays, triacs, and user-interface keypads. The 12 I/O pins can directly drive up to 12 indicator LEDs, scan a 4x3 matrix keypad, and switch low-voltage relay coils through opto-isolators. The 1.5 KB OTP easily holds appliance-state firmware including timing sequences, fault detection, and buzzer patterns. The Watchdog Timer guards against firmware lockup in high-EMI motor-drive environments, while the Power-on Reset ensures a defined cold-start behavior across global mains-voltage conditions. The commercial 0C to +70C temperature range covers all indoor appliance deployments.
Recomendado
Security Keypad and Access Controllers
Standalone security keypads for door access, alarm-system arm/disarm panels, and garage-door openers use the PIC16C56T-LP/SO to read 12-key or 16-key matrix keypads, validate PIN codes, and drive relay outputs that activate door strikes or sirens. The 1.5 KB OTP is sufficient to store multiple user PIN codes, lockout timers, and tamper-detection algorithms. The 12 I/O pins interface to the keypad matrix, the alarm-loop input, the relay-driver output, and status LEDs without external logic. The LP oscillator's low current consumption enables backup-battery operation during AC mains failure. The Watchdog Timer automatically recovers from brown-out or ESD-induced lockup at the externally accessible keypad.
Recomendado
Simple Timer and State-Machine Replacement
The PIC16C56T-LP/SO frequently replaces discrete 555-timer-based or CMOS-logic state machines in cost-sensitive commercial products. A single PIC16C56T-LP/SO can replace multiple 555 timers, debounce networks, and counter ICs while adding programmability. The 1.5 KB OTP easily stores multi-stage timing sequences used in industrial dryers, conveyor controllers, and laboratory equipment. The 12 I/O pins drive relays, solenoids, indicator lamps, and trigger inputs. The LP oscillator mode at 32.768 kHz provides accurate long-duration timing, while the Watchdog Timer eliminates the need for external supervisor ICs. The 18-pin SOIC package maintains the small footprint of the original discrete design.
Recomendado
Consumer Electronics IR Remote Controls
Universal and dedicated IR remote controls for TVs, set-top boxes, and audio equipment use the PIC16C56T-LP/SO to scan the keypad matrix, encode RC-5/RC-6/SONY-style IR protocols, and modulate the IR LED driver output at 36 kHz or 38 kHz carrier. The 1.5 KB OTP holds complete protocol libraries and custom button mappings. The 12 I/O pins directly drive a 4x4 matrix keypad and the IR LED without external drivers. The LP oscillator's low quiescent current combined with the PIC's sleep mode enables multi-year battery life from a pair of AAA cells. Power-on Reset and Watchdog Timer together ensure reliable wake-up from button presses without lockup after battery replacement.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC16C56T-LP/SO — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC16C56-LPI/SO | PIC16C56-LP/SO | PIC16C56-LPE/SO | PIC16C56T-HSI/SO | PIC16C56-RCI/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SOIC-18 | SOIC-18 - same | SOIC-18 - same | SOIC-18 - same | SOIC-18 - same | SOIC-18 - same |
| Program Memory | 1.5 KB OTP EPROM | 1.5 KB OTP | 1.5 KB OTP | 1.5 KB OTP | 1.5 KB OTP | 1.5 KB OTP |
| Data RAM | 25 bytes | 25 bytes | 25 bytes | 25 bytes | 25 bytes | 25 bytes |
| Max Clock Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Oscillator Mode | LP (Low-Power Crystal) | LP | LP | LP | HS (High-Speed Crystal) | RC (Resistor-Capacitor) |
| Operating Temperature | 0C to +70C (Commercial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +85C (Extended) | 0C to +70C (Commercial) | -40C to +85C (Industrial) |
| Packaging | Tape & Reel | Tape & Reel | Tube | Tube | Tape & Reel | Tape & Reel |
Principais diferenciais
- LP oscillator mode optimized for ultra-low standby current (vs PIC16C56T-HSI/SO)
- Tape & Reel packaging for high-volume SMT assembly (vs PIC16C56-LP/SO)
- Industry-standard PIC16C5X 8-bit RISC core (vs Cross-brand 8051 MCUs)
Notas de projeto
The PIC16C56T-LP/SO operating in LP oscillator mode at 32.768 kHz draws typically under 1 mA active current and below 1 microamp in sleep mode, making it ideal for battery-powered designs. Use a low-ESR decoupling capacitor of 100 nF ceramic placed within 5 mm of the VDD pin, and consider a 10 microfarad tantalum bulk capacitor if the supply is sourced from a high-impedance coin cell. Decouple the MCLR pin with a 10 kohm pull-up to VDD and a 100 nF capacitor to ground to suppress ESD-induced reset spikes from external connectors.
Layout the 18-pin SOIC footprint with 1.27 mm pin pitch following the IPC-7351 SOIC-18 standard land pattern. Keep the OSC1/OSC2 traces short and symmetric, surrounded by a ground guard ring to reduce EMI pickup on the low-level crystal oscillator. The MCLR trace should be isolated from high-current switching signals such as relay drivers; route MCLR directly to the programming header for in-system programming access during test. Maintain a continuous ground plane under the IC for thermal dissipation and EMI shielding.
Estimated: The PIC16C56T-LP/SO has only 25 bytes of data RAM; assuming a 6-byte stack frame per subroutine, deep call nesting can overflow the stack and corrupt program flow. Additionally, the LP oscillator mode will fail to start reliably if the load capacitance on the crystal is miscalculated - use 6 pF to 10 pF ceramic capacitors to ground on OSC1 and OSC2 for typical 32.768 kHz watch crystals. Finally, OTP EPROM cannot be re-programmed; order factory-programmed parts with sufficient firmware revision locking to prevent unauthorized cloning of security code.
Informações de conformidade
RoHS, REACH, lead-free, halogen-free, and conflict-mineral status must be verified directly with Microchip because the PIC16C56T-LP/SO is a legacy OTP EPROM device on NRND status with documentation predating many compliance directives.
