PIC16C56A-04/SO - 4MHz 8-bit OTP MCU 1.5KB SOIC-18 | Microchip
N.º da peça: PIC16C56A-04/SO ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $2.45 | $2,45 |
| 10 | $2.18 | $21,80 |
| 100 | $1.92 | $192,00 |
| 500 | $1.65 | $825,00 |
| 1.000 | $1.4 | $1.400,00 |
PIC16C56A-04/SO Visão geral
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, working RAM, and programmable I/O. The PIC16C5x architecture belongs to the original baseline PIC family, sitting in the hierarchy MCU -> 8-bit microcontroller -> embedded controller -> semiconductor. Baseline PIC cores use a Harvard architecture with separate program and data paths, RISC-like instruction set, and a hardware call/return stack. The 'A' revision in PIC16C56A adds lower power consumption and improved oscillator stability versus the original PIC16C56, while keeping the same 18-pin pinout and instruction set for source compatibility.
Key features of the PIC16C56A-04/SO include: 1.5 KB OTP program memory (1K x 12), 25 bytes of RAM, 12 I/O pins, an 8-bit timer/counter (TMR0) with an 8-bit prescaler, watchdog timer with on-chip RC oscillator, power-on reset, power-saving SLEEP mode, and an internal/external oscillator option. The 04 speed grade specifies 4 MHz maximum clock. The wide SOIC-18 package supports surface-mount assembly on consumer and industrial PCBs.
Technical depth: the PIC16C56A uses a 12-bit instruction word and a two-stage pipeline. With a 4 MHz oscillator the instruction cycle is 1 microsecond (4 Tosc). All 12 I/O pins can source/sink typical CMOS levels and individually trigger wake-up from SLEEP on pin change. The on-chip watchdog runs from a dedicated internal RC oscillator independent of the system clock, so it remains active even in SLEEP mode for failsafe recovery.
Typical applications include consumer appliance control, small white-goods motor/relay drivers, low-end remote-control transmitters, LED display drivers, simple sensor signal conditioning, and replacement of discrete logic in cost-sensitive embedded products. Designers choose this part when OTP (one-time-programmable) cost is acceptable and the firmware is locked at production.
When designing with this device, budget OTP programming time and tooling into the production flow; PIC16C5x OTP parts are programmed by Microchip-approved gang programmers. Ensure the oscillator selection matches the operating environment (XT, HS, LP, RC modes), and respect the 5.5 V absolute-maximum VDD rating.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes - including a same-package cross-reference matrix and recommended companion parts - not assembled on the manufacturer datasheet or single distributor pages.
Alternativas drop-in para PIC16C56A-04/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 PIC16C56A-04/SO (mesmo formato e footprint) — diferindo em Operating Temperature, Program Memory Type, Package, Program Memory Size, Core Architecture.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC16C56A-04E/SO
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC16C56A-04I/SO
✅ Drop-In✓ Em estoque
$1.02 / unidade
Ver ficha técnica →PIC16CR56A-04/SO
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC16C56A-20/SO
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC16C55A-04/SO
✅ Drop-In✓ Em estoque
$1.48 / unidade
Ver ficha técnica →PIC16C558-04/SO
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC16C56A-04/SO Classificações máximas e características elétricas
| Core Architecture | 8-bit PIC baseline |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 1.5 KB (1K x 12) |
| RAM | 25 bytes |
| Frequência máxima de clock | 4 MHz |
| Instruction Cycle | 1 us @ 4 MHz |
| I/O Pins | 12 |
| Timers | 1 x 8-bit (TMR0) with 8-bit prescaler |
| Watchdog Timer | Yes (on-chip dedicated RC oscillator) |
| Encapsulamento | SOIC-18 (SO, 300 mil) |
| Faixa de temperatura de operação | 0C to +70C |
| Tipo de montagem | Surface Mount |
Configuração de pinos do PIC16C56A-04/SO
| Pino 1 | RA2 — Bidirectional I/O port A bit 2 |
| Pino 2 | RA3 — Bidirectional I/O port A bit 3 |
| Pino 3 | T0CKI/RA4 — Timer0 clock input / port A bit 4 |
| Pino 4 | MCLR — Master clear (reset) input, active low |
| Pino 5 | VSS — Ground reference |
| Pino 6 | RB0/INT — 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 |
| Pino 15 | OSC2/CLKOUT — Oscillator output / clock-out |
| Pino 16 | OSC1/CLKIN — Oscillator input / external clock in |
| Pino 17 | RA0 — Bidirectional I/O port A bit 0 |
| Pino 18 | RA1 — Bidirectional I/O port A bit 1 |
Aplicações típicas
PIC16C56A-04/SO é adequado para 7 aplicaçãos: Consumer Appliance Control, LED Display Drivers, Remote Control Transmitters, Sensor Signal Conditioning, Small White-Goods Motor and Relay Drivers, Replacement of Discrete Logic ICs, Low-Cost Educational and Hobbyist Projects.
Consumer Appliance Control
The PIC16C56A-04/SO's 12 I/O pins and 1.5 KB OTP are well matched to consumer appliance controllers that drive relays, read capacitive touch pads, and sequence indicator LEDs without needing communication stacks. Its 4 MHz core yields a 1 us instruction cycle, fast enough for de-bounced switch polling at 1 kHz while the 25-byte RAM comfortably holds the active state machine. Placed on the appliance main board the part replaces 4-6 discrete logic ICs, lowering BOM cost. Compared with newer flash PICs, the OTP variant typically saves 20-30% on unit cost at high volume, justifying the upfront mask-style programming flow.
Recomendado
LED Display Drivers
With 12 I/O pins the PIC16C56A-04/SO can directly multiplex a small 7-segment + status-LED panel via charlieplexing or simple row/column scanning, eliminating a dedicated LED driver IC. The 1.5 KB OTP fits scan-table refresh routines for displays up to 8 digits and the watchdog timer keeps the display alive if the main loop locks up. The wide 0C-70C commercial temperature range covers indoor retail and consumer environments. Compared with an FPGA or CPLD solution, the PIC16C56A achieves the same LED control at roughly one-tenth the unit cost and a fraction of the PCB area.
Recomendado
Remote Control Transmitters
Battery-powered IR/RF remote controls benefit from the PIC16C56A-04/SO's SLEEP mode plus watchdog wake-up, which together drop average quiescent current to the microamp range and extend coin-cell life. The 1.5 KB OTP holds button-matrix decoders plus simple encryption/rolling-code sequences; the 12 I/O drive the keypad matrix and modulation transistor directly. The baseline PIC instruction set makes bit-banged UART, IR, or sub-GHz OOK modulation trivial. Compared with newer low-power MCUs, the PIC16C56A lacks deep-sleep modes under 1 uA but wins on per-unit cost.
Recomendado
Sensor Signal Conditioning
The PIC16C56A-04/SO's 8-bit TMR0 with 8-bit prescaler captures frequency-output sensor pulses (flow meters, tachometers, optical encoders) without external counters, while its 12 I/O drive low-side switches and read analog-style thermistor bridges via RC-discharge timing. The 4 MHz core delivers 1 us resolution, sufficient for most low-kHz sensor pulse trains. OTP memory locks calibration coefficients at production for sensor modules that must report identical values across the fleet. Compared with a dedicated counter IC, the PIC16C56A adds flexibility (re-programmable at the OEM via OTP) for the same BOM cost.
Recomendado
Small White-Goods Motor and Relay Drivers
Dishwashers, washing machines, and small kitchen appliances use the PIC16C56A-04/SO to sequence triac/SCR gate drives for pump and heater relays via its 12 I/O. The 1.5 KB OTP holds the cycle state machine plus safety timing; the watchdog timer recovers from brown-out or EMI upset. The 18-pin SOIC-18 wide-body package is easily hand-solderable for service and aftermarket rebuilds. Compared with discrete 555-timer-based controllers, the PIC16C56A enables software-defined cycle profiles at similar cost.
Recomendado
Replacement of Discrete Logic ICs
Where designers previously stacked 74HC-series glue logic, a single PIC16C56A-04/SO at 4 MHz can replace 3-5 discrete gates while adding state retention and test hooks. The 25-byte RAM plus 1.5 KB OTP supports multi-state machines and lookup tables that no discrete-logic implementation can match at the same footprint. The 18-pin SOIC-18 package drops onto existing 74HC00-series PCB patterns with minor trace rework. Compared with continuing to use 74HC logic, the PIC16C56A reduces PCB area by roughly 50% and BOM count by 60%.
Recomendado
Low-Cost Educational and Hobbyist Projects
The PIC16C56A-04/SO appears in microcontroller training kits and retro-computing hobby projects because its 18-pin SOIC and baseline PIC instruction set remain pedagogically valuable for learning RISC architectures and OTP programming workflows. The 12 I/O drive breadboard-friendly LED and button circuits and the 4 MHz core supports simple UART bit-banging at 9600 baud. The OTP limitation forces good software-design discipline because there is no field re-program option. Compared with the flash PIC16F57 successor, this part remains the historical reference for baseline-PIC instruction-set teaching.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC16C56A-04/SO — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC16C56A-04E/SO | PIC16C56A-04I/SO | PIC16CR56A-04/SO | PIC16C56A-20/SO | PIC16C55A-04/SO | PIC16C558-04/SO |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SOIC-18 (SO, 300 mil) | SOIC-18 (SO, 300 mil) - same | SOIC-18 (SO, 300 mil) - same | SOIC-18 (SO, 300 mil) - same | SOIC-18 (SO, 300 mil) - same | SOIC-18 (SO, 300 mil) - same | SOIC-18 (SO, 300 mil) - same |
| Core Architecture | 8-bit baseline PIC | 8-bit baseline PIC | 8-bit baseline PIC | 8-bit baseline PIC | 8-bit baseline PIC | 8-bit baseline PIC | 8-bit mid-range PIC (different ISA) |
| Max Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz | 4 MHz | 4 MHz |
| I/O Pins | 12 | 12 | 12 | 12 | 12 | 12 | 13 |
| Operating Temperature | 0C to +70C (commercial) | -40C to +125C (extended) | -40C to +85C (industrial) | 0C to +70C (commercial) | 0C to +70C (commercial) | 0C to +70C (commercial) | 0C to +70C (commercial) |
Principais diferenciais
- Same baseline PIC core with wider temperature envelope (vs PIC16C56A-04I/SO)
- More program memory than the PIC16C55A sibling (vs PIC16C55A-04/SO)
- OTP allows lower unit cost vs. flash PICs (vs PIC16F57 (flash equivalent))
Notas de projeto
Estimated: at VDD = 5.0 V and 4 MHz oscillator, the PIC16C56A typically draws 2-5 mA active and < 10 uA in SLEEP mode per the Microchip PIC16C5X datasheet (DC characteristics). Decouple VDD (pin 14) with a 100 nF ceramic capacitor placed within 5 mm of the package, plus a 10 uF bulk capacitor at the board entry. The MCLR pin (4) should be tied to VDD through a 10 kohm pull-up for normal operation; if unused it must still be pulled high to avoid spurious resets. Brown-out conditions are handled by internal POR only - add external brown-out if the supply is noisy.
Keep the SOIC-18 trace widths at least 0.2 mm (8 mil) for signal lines and 0.3 mm (12 mil) for power. Place the crystal or resonator as close as possible to OSC1 (pin 16) and OSC2 (pin 15), with ground guard traces around the oscillator network to reduce EMI. For surface-mount crystals add a 1 Mohm feedback resistor across OSC1/OSC2 in XT mode. Avoid running high-frequency switching traces (relay drivers, triac gates) directly under the SOIC-18 footprint to prevent injected noise into the oscillator.
Do not exceed the 5.5 V absolute maximum on VDD - the PIC16C56A is a 5 V part and lacks the 3.3 V tolerance of newer PICs. OTP memory cannot be re-programmed; budget a small prototype batch through your programmer (MPLAB PM3 or equivalent) before committing to high-volume runs. Always check the Microchip silicon errata for the PIC16C56A die revision you are using, especially regarding the watchdog timer disable bit and oscillator start-up timer behavior. When migrating to PIC16C55A, remember it has only 0.75 KB OTP - code that fits PIC16C56A may exceed PIC16C55A capacity.
Informações de conformidade
Verified web data does not list RoHS/REACH/lead-free certifications for PIC16C56A-04/SO directly. Refer to the Microchip product page (microchip.com/en-us/product/PIC16C56A) for the latest compliance declarations. AEC-Q100 not applicable for this commercial-temperature MCU.
