PIC16C56A-04I/SO - 8-Bit 4MHz OTP MCU 1.5KB | Microchip
N.º da peça: PIC16C56A-04I/SO ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $1.84 | $1,84 |
| 10 | $1.65 | $16,50 |
| 100 | $1.4 | $140,00 |
| 500 | $1.18 | $590,00 |
| 1.000 | $1.02 | $1.020,00 |
PIC16C56A-04I/SO Visão geral
What is an OTP microcontroller? An OTP microcontroller is a single-chip microcomputer that contains non-erasable program memory (typically EPROM-based) which can be programmed once after manufacture and never re-written. These parts occupy a position in the taxonomy: microcontroller -> embedded MCU -> 8-bit MCU -> OTP MCU -> RISC MCU. OTP devices are common in low-cost, high-volume consumer and industrial applications where firmware is fixed for the product lifetime and field re-programmability is not required.
Key features of the PIC16C56A-04I/SO include 25 bytes of general-purpose RAM, 12 digital I/O pins, an 8-bit real-time clock/counter (TMR0) with 8-bit programmable prescaler, a two-level deep hardware stack, and 33 single-word single-cycle RISC instructions. The Harvard architecture separates the 12-bit program path from the 8-bit data path, achieving a 2:1 code compression over competing 8-bit architectures and most instructions execute in one instruction cycle (250 ns at 4 MHz oscillator).
The device integrates an internal power-on reset, watchdog timer, and code-protection bit for basic security. Power-saving SLEEP mode reduces Icc to less than 1 uA typical, making the part suitable for battery or line-powered applications with strict standby budgets. Operating voltage is 2.5V to 6.0V (commercial/industrial), and I/O sink/source capability is rated for direct LED drive in many designs.
Typical applications include low-cost remote controls, small appliance controls, LED drivers, simple sensor interfaces, and battery-powered toys where low unit cost and small footprint outweigh the need for flash reprogrammability. The PIC16C5X RISC instruction set and Microchip's free MPLAB development toolchain (with PM3 programmer) make this family a long-standing choice for cost-sensitive embedded products.
When designing with this part, evaluate whether your firmware will require field updates; if so, choose a flash-based PIC16F equivalent instead. The OTP variant offers the lowest unit cost but cannot be re-programmed. Use the Microchip PM3 or equivalent programmer; do not attempt in-system programming since the device lacks ICSP.
This page synthesizes distributor pricing, drop-in same-package alternatives (PIC16C55A-04I/SO, PIC16C54A-04I/SO), datasheet pinout and design notes not found on a single distributor listing.
Alternativas drop-in para PIC16C56A-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 PIC16C56A-04I/SO (mesmo formato e footprint) — diferindo em Timers, Watchdog Timer, Program Memory Type, Package, Core Architecture.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC16C55A-04I/SO
✅ Drop-In✓ Em estoque
$2.05 / unidade
Ver ficha técnica →PIC16C54A-04I/SO
✅ Drop-In✓ Em estoque
$2.55 / unidade
Ver ficha técnica →PIC16C56A-04/SO
✅ Drop-In✓ Em estoque
$1.4 / unidade
Ver ficha técnica →PIC16C56A-04/P
✅ Drop-In✓ Em estoque
$1.85 / unidade
Ver ficha técnica →PIC16F54-I/SO
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC16C56A-04I/SO Classificações máximas e características elétricas
| Manufacturer | Microchip Technology |
| Series | PIC 16C |
| Core Processor | PIC |
| Core Size | 8-Bit |
| Max CPU Frequency | 4 MHz |
| Program Memory Size | 1.5 KB (1K x 12 words) |
| Program Memory Type | OTP (One-Time Programmable) EPROM |
| RAM Size | 25 bytes |
| Number of I/O Pins | 12 |
| Supply Voltage (Vdd) | 2.5 V to 6.0 V |
| Temperatura de operação | -40C to +85C (Industrial) |
| Encapsulamento / Caixa | 18-SOIC (300 mil, SO) |
| Tipo de montagem | Surface Mount |
| Oscillator Type | External RC or crystal/ceramic resonator |
| Number of Instructions | 33 (12-bit wide) |
| Hardware Stack | 2 levels |
| Timers | 1 x 8-bit (TMR0 with 8-bit prescaler) |
| Watchdog Timer | Yes (on-chip) |
| Power-on Reset | Yes (internal) |
| Code Protection | Yes (programmable fuse) |
Configuração de pinos do PIC16C56A-04I/SO
| Pino 1 | RA2 — General-purpose digital I/O port A bit 2 |
| Pino 2 | RA3 — General-purpose digital I/O port A bit 3 |
| Pino 3 | RA4/T0CKI — Digital I/O / Timer0 clock input |
| Pino 4 | MCLR — Master clear reset input (active low) |
| Pino 5 | Vss — Ground reference |
| Pino 6 | RB0/INT — Digital I/O port B bit 0 / external interrupt |
| Pino 7 | RB1 — General-purpose digital I/O port B bit 1 |
| Pino 8 | RB2 — General-purpose digital I/O port B bit 2 |
| Pino 9 | RB3 — General-purpose digital I/O port B bit 3 |
| Pino 10 | RB4 — General-purpose digital I/O port B bit 4 |
| Pino 11 | RB5 — General-purpose digital I/O port B bit 5 |
| Pino 12 | RB6 — General-purpose digital I/O port B bit 6 |
| Pino 13 | RB7 — General-purpose digital I/O port B bit 7 |
| Pino 14 | Vdd — Positive supply voltage (2.5V to 6.0V) |
| Pino 15 | OSC2/CLKOUT — Oscillator crystal output / clock output (Fosc/4) |
| Pino 16 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| Pino 17 | RA0 — General-purpose digital I/O port A bit 0 |
| Pino 18 | RA1 — General-purpose digital I/O port A bit 1 |
Aplicações típicas
PIC16C56A-04I/SO é adequado para 6 aplicaçãos: Remote Control Transmitter, Small Appliance Control Board, LED Display Driver Module, Battery-Powered Sensor Interface, Toy and Hobby Electronics, Industrial Timer and Counter Module.
Remote Control Transmitter
The PIC16C56A-04I/SO fits handheld remote controls because of its 1.5 KB OTP program memory (enough for a 32-key matrix scanner and IR transmit protocol), 12 I/O pins to directly drive a key matrix and IR LED, and 4 MHz internal execution that handles Manchester or RC5 encoding at carrier frequencies up to 40 kHz. Why this part fits: OTP keeps per-unit cost below $1.50 at 1K pieces, and the 25-byte RAM is sufficient for state-machine encoders with no display buffer. The 18-SOIC package fits inside slim remote housings, and the industrial -40C to +85C rating covers outdoor storage. Place the part between the 3V coin cell and the IR LED driver; no additional LDO is needed. Trade-off: once programmed, firmware cannot be updated, so production lock-down is final.
Recomendado
Small Appliance Control Board
The PIC16C56A-04I/SO is widely deployed in low-end appliance controls such as coffee makers, fans, and toasters where the firmware is permanently fixed. Why it fits: 1.5 KB OTP holds the temperature-time state machine, 12 I/O lines directly sink 25 mA to drive triac gates or relay coils without buffer transistors, and the 2.5V-6.0V Vdd range accepts 5V linear supplies. The internal watchdog timer catches mains-burst lockups, and the 250 ns instruction cycle handles 50/60 Hz zero-cross detection at 4 MHz with 16x headroom. Use it as the central controller on the secondary side of a transformerless capacitive-drop supply; the 18-SOIC surface-mount form factor is compatible with wave or reflow soldering.
Recomendado
LED Display Driver Module
The PIC16C56A-04I/SO can multiplex a small 7-segment or dot-matrix LED display because each of its 12 I/O pins can source/sink 25 mA - enough to drive common-cathode digit transistors directly. Why it fits: 1.5 KB OTP holds the font table plus a 4-digit BCD-to-7-segment lookup, 4 MHz execution supports up to 500 Hz multiplex refresh rate to avoid visible flicker, and 25-byte RAM buffers the display state. Industrial temperature range allows outdoor signage installation. Place the MCU between the 5V supply and the digit drivers; OTP cost optimization keeps the BOM well under $2 per board.
Recomendado
Battery-Powered Sensor Interface
The PIC16C56A-04I/SO suits battery-powered sensor modules with sleep-mode duty cycling because its SLEEP current is well under 1 uA, and the 2.5V minimum Vdd accommodates two depleted AA cells. Why it fits: 1.5 KB OTP stores the sensor calibration table and threshold logic, 12 I/O handles an analog sensor input plus an interrupt-on-change wake source, and the 33-instruction RISC core lets the part wake, sample, decide, and return to sleep in well under 100 us. Use it between the battery and a low-power sensor front-end; OTP cost optimization is decisive in volume disposable applications such as single-use medical patches or environmental loggers.
Recomendado
Toy and Hobby Electronics
The PIC16C56A-04I/SO is a cost-optimized choice for mass-market toys and hobby kits because the OTP variant costs roughly 30% less than flash equivalents and the 18-SOIC footprint reflows onto small PCBs. Why it fits: 1.5 KB OTP holds sound-effect tables and motor-sequencing routines, 12 I/O directly drives small DC motors via Darlington arrays or hobby servos, and the 4 MHz oscillator tolerates ceramic resonators (cheaper than crystals). Industrial temperature rating covers indoor/outdoor play environments. Place it as the central controller between 2-4 AA cells and motor-driver outputs.
Recomendado
Industrial Timer and Counter Module
The PIC16C56A-04I/SO serves as the timing brain in industrial counter and interval-timer modules where firmware is locked at production and BOM cost is paramount. Why it fits: the on-chip 8-bit TMR0 with 8-bit prescaler gives 16-bit effective timing resolution at 4 MHz (65 ms full-scale), 1.5 KB OTP holds BCD counting routines and relay-debounce state machines, and 12 I/O directly interfaces to thumbwheel switches, BCD displays, and output relays. The industrial -40C to +85C rating covers factory-floor environments, and the internal watchdog timer prevents hang-up on EMI events. Use it between a 24V-to-5V regulator and the user interface.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC16C56A-04I/SO — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC16C55A-04I/SO | PIC16C54A-04I/SO | PIC16C56A-04/SO | PIC16C56A-04/P | PIC16F54-I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-SOIC (SO) | 18-SOIC (SO) - same | 18-SOIC (SO) - same | 18-SOIC (SO) - same | PDIP-18 (P) - through-hole | 18-SOIC (SO) - same |
| Program Memory | 1.5 KB (1K x 12) OTP | 768 bytes (512 x 12) OTP | 512 bytes (256 x 12) OTP | 1.5 KB (1K x 12) OTP | 1.5 KB (1K x 12) OTP | 512 bytes Flash (re-programmable) |
| RAM Size | 25 bytes | 25 bytes | 25 bytes | 25 bytes | 25 bytes | 25 bytes |
| Max Oscillator Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz |
| Operating Voltage | 2.5V to 6.0V | 2.5V to 6.0V | 2.5V to 6.0V | 2.5V to 6.0V | 2.5V to 6.0V | 2.0V to 5.5V |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Number of I/O Pins | 12 | 12 | 12 | 12 | 12 | 12 |
| In-Circuit Re-programmable | No (OTP) | No (OTP) | No (OTP) | No (OTP) | No (OTP) | Yes (Flash + ICSP) |
Principais diferenciais
- Largest OTP program memory in the PIC16C5X family at 18-SOIC (vs PIC16C55A-04I/SO)
- Industrial temperature grade in 18-SOIC (vs PIC16C56A-04/SO)
- Surface-mount 18-SOIC vs through-hole PDIP (vs PIC16C56A-04/P)
Notas de projeto
The PIC16C56A-04I/SO operates over 2.5V to 6.0V and draws <2 mA active at 4 MHz / 5V, dropping to <1 uA in SLEEP. For battery applications, gate the supply with a load switch and place a 100 nF decoupling capacitor within 5 mm of Vdd (pin 14) plus a 10 uF bulk capacitor on the battery side. The internal power-on reset eliminates the external RC reset network, but MCLR (pin 4) should be tied to Vdd through a 10 kohm resistor for in-circuit debug with the MPLAB PM3 programmer.
Do not confuse the PIC16C56A-04I/SO (OTP, industrial temp) with the PIC16C56A-04/SO (OTP, commercial temp) - same die and package, but the 'I' suffix is mandatory for outdoor, automotive, or industrial deployments. Also note that OTP cannot be re-programmed; if firmware iteration is expected, switch to PIC16F54-I/SO in the same footprint. The 33-instruction PIC16C5X core is NOT binary compatible with the PIC16F mid-range core - assembly code must be re-assembled if migrating.
For the 18-SOIC (300 mil body), follow standard SOIC land patterns with 1.27 mm pin pitch and 0.51 mm pad width. Place a ground pour directly under the IC and connect pin 5 (Vss) and pin 14 (Vdd) with the shortest possible traces to their respective decoupling capacitors. Keep the OSC1/OSC2 traces short and symmetrical - use a 4 MHz ceramic resonator with built-in capacitors or a crystal with two 22 pF loading caps. Avoid routing signal traces under the resonator to prevent coupling.
Estimated: at 4 MHz / 5V / 100% duty, the PIC16C56A-04I/SO dissipates approximately 30 mW (Vdd x Icc = 5V x 6 mA), yielding a junction temperature rise of about 1.8C above ambient at the 18-SOIC theta_JA of ~60 C/W. The industrial -40C to +85C operating range is comfortably met without heatsinking. In SLEEP mode, power drops below 5 uW and thermal considerations are negligible.
Informações de conformidade
RoHS, REACH, lead-free, halogen-free status for the PIC16C56A-04I/SO not stated in the verified web data; consult Microchip product page or PCN documents for definitive compliance statements. AEC-Q100 not applicable to this industrial-grade 8-bit MCU.
