PIC16C56T-RCI/SO - 8-Bit 4MHz OTP MCU 1.5KB | Microchip
MPN: PIC16C56T-RCI/SO ✓ نشطPIC16C56T-RCI/SO نظرة عامة
An 8-bit OTP microcontroller is a single-chip computer built around an 8-bit data path, executing one instruction per internal cycle and storing its program in EPROM that can be written exactly once. These devices sit in the hierarchy of microcontroller -> embedded controller -> semiconductor, and the PIC16C5X family specifically targets simple control loops, glue logic replacement, and low-cost consumer/industrial products where flash reprogrammability is unnecessary.
Key features include a Harvard architecture with separate program and data buses, 33 single-word/single-cycle instructions, a 4MHz maximum operating frequency yielding 1MHz instruction throughput (4:1 clock-to-instruction ratio), and an operating voltage range of 3.0V to 5.5V supporting both 3.3V and 5V rails. The 12-bit wide instruction set delivers typical 2:1 code compression over comparable 8-bit CISC microcontrollers, reducing program memory pressure on the 1K-word code space.
The PIC16C56T-RCI/SO employs a fully static CMOS design with low-power consumption, an internal RC oscillator option, and brown-out/reset circuitry suitable for battery-backed and mains-powered installations. The 18-pin SOIC (0.295 inch / 7.50 mm width) package provides a compact through-hole-compatible surface-mount footprint compatible with hand-soldering and standard 300-mil SOIC land patterns.
Typical applications include appliance control boards, HVAC thermostat interfaces, simple sensor signal conditioning front-ends, low-end remote controls, and industrial timer/counter modules. Designers also use the PIC16C56 in battery-powered sensor interfaces where its CMOS sleep current and internal oscillator minimize external component count.
When designing with this part, note that OTP memory cannot be re-programmed - choose the PIC16F56 flash-based alternative for prototyping and field updates. The 18-pin SOIC shares a pinout with most PIC16C5X family members (PIC16C54/55/57), enabling easy migration between family variants when memory or peripheral requirements change. Always validate code-protection settings before committing to OTP production programming.
This page synthesizes distributor pricing, drop-in PIC16C5X alternatives, and practical design notes that complement - not duplicate - the manufacturer datasheet.
بدائل مباشرة لـ PIC16C56T-RCI/SO — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع PIC16C56T-RCI/SO (نفس عامل الشكل والبصمة) — يختلف في Package, Core Architecture, Program Memory Size, Program Memory Type, Operating Temperature.
PIC16C55T-RCI/SO
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C56-RCI/SO
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C55T-HSI/SO
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C55T-LPI/SO
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C55T-RCE/SO
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
PIC16C55-RCI/SO
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C56T-RCI/SO الحدود القصوى والخصائص الكهربائية
| Core Architecture | 8-bit PIC RISC (Harvard) |
| Family | PIC16C5X (PIC16C56 sub-family) |
| أقصى تردد للساعة | 4 MHz |
| Instruction Throughput | 1 MIPS (4:1 clock-to-instruction) |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 1.5 KB (1K x 12 words) |
| Data RAM | 25 bytes (8-bit) |
| Operating Voltage Range | 3.0 V to 5.5 V (3.3 V / 5 V) |
| I/O Pins | 12 |
| Timers | 1 x 8-bit watchdog/reset timer |
| Instruction Set | 33 instructions, 12-bit wide |
| Code Protection | Programmable via configuration bits |
| درجة حرارة التشغيل | -40C to +85C (industrial) |
| العلبة | 18-SOIC (0.295 inch / 7.50 mm width) |
| نوع التركيب | Surface Mount (Tape & Reel) |
| Process Technology | CMOS |
تكوين أطراف PIC16C56T-RCI/SO
| دبوس 1 | RA2 — Bidirectional I/O port A bit 2 |
| دبوس 2 | RA3 — Bidirectional I/O port A bit 3 |
| دبوس 3 | RTCC — Real-Time Clock/Counter input or I/O |
| دبوس 4 | MCLR — Master Clear (Reset) input, active low |
| دبوس 5 | VSS — Ground reference |
| دبوس 6 | RB0 — Bidirectional I/O port B bit 0 |
| دبوس 7 | RB1 — Bidirectional I/O port B bit 1 |
| دبوس 8 | RB2 — Bidirectional I/O port B bit 2 |
| دبوس 9 | RB3 — Bidirectional I/O port B bit 3 |
| دبوس 10 | RB4 — Bidirectional I/O port B bit 4 |
| دبوس 11 | RB5 — Bidirectional I/O port B bit 5 |
| دبوس 12 | RB6 — Bidirectional I/O port B bit 6 |
| دبوس 13 | RB7 — Bidirectional I/O port B bit 7 |
| دبوس 14 | VDD — Positive supply voltage (3.0V to 5.5V) |
| دبوس 15 | OSC2 — Oscillator output / CLKOUT |
| دبوس 16 | OSC1 — Oscillator input / CLKIN |
| دبوس 17 | RA0 — Bidirectional I/O port A bit 0 |
| دبوس 18 | RA1 — Bidirectional I/O port A bit 1 |
التطبيقات النموذجية
PIC16C56T-RCI/SO مناسب لـ 7 التطبيقs: Appliance Control Boards, HVAC Thermostat Interfaces, Remote Control Transmitters, Industrial Timer and Counter Modules, Sensor Signal Conditioning Front-Ends, Battery-Powered Sensor Interfaces, Consumer Electronics User Interface.
Appliance Control Boards
The PIC16C56T-RCI/SO is well-suited for cost-sensitive appliance control boards (washing machines, microwave ovens, dishwashers) because its 1.5KB OTP program memory and 33-instruction RISC core deliver reliable embedded control at minimum BOM cost. With 12 GPIO pins, the part can directly drive relay coils, triac interfaces, LED indicators, and 7-segment displays without external logic. The 3.0-5.5V supply range accommodates both 3.3V and 5V designs common in white goods. Built-in watchdog timer and power-on reset simplify firmware reliability for unattended consumer products. The 18-SOIC package on tape-and-reel supports high-speed pick-and-place assembly in mass-production appliance manufacturing.
موصى به
HVAC Thermostat Interfaces
Thermostat and HVAC user-interface boards benefit from the PIC16C56T-RCI/SO's small footprint and low power consumption. Its 4MHz clock rate is more than adequate for scanning keypads, driving LCD segments or character displays, and reading temperature sensors via I/O bit-banging. The 25-byte RAM supports simple state machines for schedule-based temperature control. The industrial -40C to +85C operating range handles indoor equipment environments. With OTP memory, firmware is locked at production - reducing field-reprogramming risk for high-volume thermostat OEM deployments.
موصى به
Remote Control Transmitters
Low-end infrared and RF remote controls leverage the PIC16C56T-RCI/SO's ultra-low cost, simple 33-instruction core, and small 18-SOIC package. The 4MHz internal instruction cycle supports software-based Manchester or pulse-width encoders for IR transmission protocols (RC-5, NEC, proprietary). The 12 I/O pins handle keypad scanning (4x4 matrix), IR LED drive via PWM/RC networks, and indicator LEDs. OTP memory prevents firmware cloning by competitors - a security benefit for high-volume consumer remote-control products. Low-power CMOS sleep modes extend battery life in handheld remote applications.
موصى به
Industrial Timer and Counter Modules
Industrial timer, counter, and sequencer modules deploy the PIC16C56T-RCI/SO for its deterministic 1 MIPS throughput and built-in watchdog timer. The 8-bit timer with on-chip RC oscillator provides accurate timing without external crystals in many designs. The 12 GPIO pins support digital input conditioning, optocoupler interfaces for 24V industrial signals, and relay/solenoid driver outputs. OTP memory prevents unauthorized firmware modification in factory-floor control equipment. The 18-SOIC package is compatible with hand-soldering for prototype and low-volume industrial production runs.
موصى به
Sensor Signal Conditioning Front-Ends
Simple sensor signal conditioning boards use the PIC16C56T-RCI/SO as a low-cost ADC-free microcontroller paired with external sigma-delta or dual-slope converters. The 4MHz clock supports software UART communication for sensor data logging, while 12 GPIO lines drive MUX select lines and latch control signals. The 25-byte RAM holds raw ADC samples before averaging and forwarding. OTP code protection prevents reverse-engineering of proprietary calibration algorithms. The 3.0-5.5V supply range accommodates battery and line-powered sensor nodes.
موصى به
Battery-Powered Sensor Interfaces
Battery-powered wireless sensor endpoints leverage the PIC16C56T-RCI/SO's CMOS low-power architecture and 3.0-5.5V supply range to maximize battery life. The internal RC oscillator and sleep modes support duty-cycled operation where the MCU wakes, samples, transmits, and returns to sleep within milliseconds. The 4MHz active clock enables fast processing between long sleep periods. OTP memory prevents firmware tampering for security-sensitive applications. The compact 18-SOIC package fits inside miniature sensor housings used in IoT and industrial monitoring deployments.
موصى به
Consumer Electronics User Interface
Consumer electronics user-interface boards (toys, small appliances, audio accessories) deploy the PIC16C56T-RCI/SO for button debouncing, LED pattern control, and simple buzzer tone generation. The 33-instruction RISC core handles multiple concurrent tasks via cooperative scheduling within the 1.5KB code space. The 12 GPIO pins support 4x4 keypads, RGB LED drivers, and PWM audio output via timer overflow interrupts. OTP memory secures proprietary UI/UX firmware. The 18-SOIC 7.50mm package provides a robust mechanical mount suitable for hand-assembly consumer products.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC16C56T-RCI/SO — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC16C55T-RCI/SO | PIC16C56-RCI/SO | PIC16C55T-HSI/SO | PIC16C55T-LPI/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-SOIC (7.50 mm) | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same |
| Program Memory | 1.5 KB (1K x 12) OTP | 1.5 KB OTP | 1.5 KB OTP | 1.5 KB OTP | 1.5 KB OTP |
| Max Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 20 MHz | 200 kHz |
| Operating Voltage | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V | 2.5V to 6.0V |
| RAM | 25 bytes | 25 bytes | 25 bytes | 25 bytes | 25 bytes |
| I/O Pins | 12 | 12 | 12 | 12 | 12 |
| Memory Type | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM |
| Packaging | Tape & Reel | Tape & Reel | Tube | Tape & Reel | Tape & Reel |
أبرز الفروقات
- Wide operating voltage 3.0V-5.5V supports both 3.3V and 5V rails (مقابلPIC16C55T-LPI/SO)
- Standard 4MHz RC-oscillator variant for cost-down crystal-less designs (مقابلPIC16C55T-HSI/SO)
- Tape-and-reel packaging for high-speed SMT assembly (مقابلPIC16C56-RCI/SO)
ملاحظات التصميم
PIC16C56T-RCI/SO supply design must include a 100nF ceramic decoupling capacitor placed within 5mm of the VDD pin (pin 14), with a bulk 10uF tantalum or aluminum electrolytic capacitor at the board's power entry point. The MCU draws up to ~2mA active at 4MHz/5V; add a series ferrite bead if the supply rail is shared with switching converters to prevent digital noise injection into analog sections of the board.
Route the MCLR (pin 4) trace as short as possible and place the 10k pull-up resistor within 5mm of the MCU. For noisy industrial environments, add a 100nF capacitor and 1N4148 diode clamp on MCLR to prevent voltage transients from triggering unintended resets. The OSC1/OSC2 traces (pins 15-16) should be short and guarded with a ground plane on both sides if using a crystal oscillator.
Do not attempt to reprogram OTP memory in-circuit - it is one-time programmable and will reject further writes. Validate all firmware using a flash-based PIC16F56 or PIC16F84A equivalent before committing to OTP production. Confirm that your code-protection configuration bits are set correctly BEFORE OTP programming; once programmed, the code is permanently locked and cannot be changed. Order extra units (~10% overage) for development to allow for code-protection misconfiguration recoveries.
معلومات الامتثال
RoHS, REACH, lead-free, and halogen-free compliance status was not present in the verified web data - [DATA_NEEDED] markers used in specs. The PIC16C56 family is not AEC-Q100 qualified; consider PIC16F or PIC18 automotive-grade variants for vehicle applications.