PIC16C56AT-04E/SO - 8-bit OTP MCU, 4MHz, 1.5KB | Microchip
MPN: PIC16C56AT-04E/SO ✓ نشطPIC16C56AT-04E/SO نظرة عامة
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral interfaces on one silicon die. The PIC16C5X family belongs to the 8-bit microcontroller taxonomy, sitting beneath broader categories of microcontrollers, embedded processors, and finally integrated circuits. These classic PIC MCUs serve cost-sensitive, deterministic control applications where 12-bit wide instructions deliver 2:1 code compression versus competing 8-bit architectures of the same era.
Key features include an extended operating temperature range of -40C to +125C (the 'E' suffix), 4 MHz maximum clock at 4 MHz crystal/RC oscillator input, 12 I/O pins with high-current sink/source capability, an 8-bit real-time timer/counter, watchdog timer with on-chip RC oscillator, power-on reset, and code protection. The 18-SOIC (0.295 inch / 7.50 mm width) package supports legacy surface-mount designs with reliable hand-soldering and standard IR reflow profiles.
The PIC16C56AT uses an enhanced Harvard architecture with separate program and data buses, allowing simultaneous instruction fetch and data access. Its 33 single-word instructions and 12-bit-wide instruction word simplify compiler output and hand-coded assembly, while the fully static design enables operation down to DC clock speeds for low-power sleep implementations.
Typical applications include appliance control, automotive sub-systems (body electronics, lighting controllers), industrial sensor interfaces, simple motor control, smart card readers, and battery-powered instrument front-ends. The 1.5 KB program memory fits state-machine logic, lookup tables, and small protocol stacks including I2C bit-banging or LIN slave handlers.
When designing with this device, note that the OTP memory cannot be reprogrammed - choose the PIC16F56 flash sibling or PIC16C56A-20/SO windowed ceramic-package variant for development. Decoupling VDD with 0.1 uF close to the pins is mandatory; the MCLR reset pin requires a pull-up for normal operation.
This page synthesizes distributor inventory, parametric alternatives, and practical design notes beyond the manufacturer datasheet, helping engineers source, qualify, and design-in the PIC16C56AT-04E/SO with confidence.
بدائل مباشرة لـ PIC16C56AT-04E/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 PIC16C56AT-04E/SO (نفس عامل الشكل والبصمة) — يختلف في Core Architecture, Package, Operating Temperature, Timers, Mounting Type.
PIC16C56A-04E/SO
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC16C56A-04E/P
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C55AT-04E/SO
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C558-04E/SO
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC16F56-I/SO
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC16C56AT-04E/SO الحدود القصوى والخصائص الكهربائية
| Product Type | 8-bit Microcontroller (MCU) |
| Series | PIC16C5X |
| Core Architecture | PIC (8-bit RISC, Harvard) |
| Program Memory | 1.5 KB (1K x 12) OTP/EPROM |
| RAM | 25 x 8 bytes |
| أقصى تردد للساعة | 4 MHz |
| عرض ناقل البيانات | 8 bit |
| Instruction Set Word Size | 12 bit |
| I/O Pins | 12 |
| Timers | 1 x 8-bit with WDT |
| Watchdog Timer | Yes (on-chip RC oscillator) |
| العلبة | 18-SOIC (0.295" / 7.50 mm width) |
| نطاق درجة حرارة التشغيل | -40C to +125C (Extended, 'E' suffix) |
| Oscillator Type | External RC / Crystal |
| Program Memory Type | OTP (One-Time Programmable) |
| نوع التركيب | Surface Mount |
| حالة RoHS | Compliant |
تكوين أطراف PIC16C56AT-04E/SO
| دبوس 1 | RA2 — Port A bit 2 (bidirectional I/O) |
| دبوس 2 | RA3 — Port A bit 3 (bidirectional I/O) |
| دبوس 3 | RTCC — Real-Time Clock/Counter input (Schmitt trigger) |
| دبوس 4 | MCLR — Master Clear (reset, active low, requires pull-up) |
| دبوس 5 | VSS — Ground reference |
| دبوس 6 | RB0 — Port B bit 0 (bidirectional I/O) |
| دبوس 7 | RB1 — Port B bit 1 (bidirectional I/O) |
| دبوس 8 | RB2 — Port B bit 2 (bidirectional I/O) |
| دبوس 9 | RB3 — Port B bit 3 (bidirectional I/O) |
| دبوس 10 | RB4 — Port B bit 4 (bidirectional I/O) |
| دبوس 11 | RB5 — Port B bit 5 (bidirectional I/O) |
| دبوس 12 | RB6 — Port B bit 6 (bidirectional I/O) |
| دبوس 13 | RB7 — Port B bit 7 (bidirectional I/O) |
| دبوس 14 | VSS — Ground reference (second VSS pin) |
| دبوس 15 | OSC2 — Oscillator output (crystal/RC) |
| دبوس 16 | OSC1 — Oscillator input (crystal/RC) |
| دبوس 17 | RC0 — Port C bit 0 (bidirectional I/O) |
| دبوس 18 | RC1 — Port C bit 1 (bidirectional I/O) |
التطبيقات النموذجية
PIC16C56AT-04E/SO مناسب لـ 6 التطبيقs: Appliance Control Front-End, Automotive Body Electronics, Industrial Sensor Interface, Smart Card and RFID Reader, Battery-Powered Instrument Front-End, LED Lighting Controller.
Appliance Control Front-End
The PIC16C56AT-04E/SO fits white-goods appliance controls including dishwasher cycle timers, washing machine user interfaces, and microwave oven keypad handlers. Its 1.5 KB OTP memory holds state-machine code for relay sequencing, LED/LCD multiplexing, and buzzer feedback patterns. The 12 I/O pins directly drive triac optocouplers, scan 4x4 matrix keypads via Charlieplexing, and read rotary encoder inputs. The extended -40C to +125C range survives under-hood or compressor-adjacent mounting where consumer-grade MCUs would fail. Compared with modern Cortex-M0 alternatives, this part costs less than half per unit at production volumes, justifying OTP for one-time-programmed firmware.
موصى به
Automotive Body Electronics
The PIC16C56AT-04E/SO serves automotive body controllers such as interior lighting dimmers, seat-position memory switches, and mirror-adjustment modules. Its 4 MHz core and 12-bit instruction width deliver deterministic control without RTOS overhead, and the -40C to +125C range handles cabin and underhood thermal excursions. The 12 I/O lines read switch matrices, drive MOSFET gates for LED strings, and PWM low-side loads for seat motors. Microchip's automotive-grade product longevity program typically supports the PIC16C5X family for 15+ years, matching vehicle production cycles.
موصى به
Industrial Sensor Interface
The PIC16C56AT-04E/SO excels at industrial sensor signal-conditioning nodes, converting analog or digital sensor outputs to clean protocol frames for PLC backplanes. The 1.5 KB program memory fits calibration tables, linearization curves for thermocouples or RTDs, and Modbus RTU or 4-20 mA loop transmitters. Its 4 MHz clock provides ample bandwidth for bit-banged SPI/I2C to digital sensors like the MCP9808 or ADS1118. The wide operating temperature ensures reliable operation in factory-floor enclosures without derating, and the OTP memory protects against firmware tampering in field-deployed sensor modules.
موصى به
Smart Card and RFID Reader
The PIC16C56AT-04E/SO drives low-cost contactless smart-card readers for access control, transit fare collection, and loyalty terminals. Its deterministic instruction timing handles bit-banged ISO 14443 Type A/B protocols for proximity cards and ISO 15693 for vicinity tags. The 25-byte RAM fits temporary buffers for UID extraction and authentication challenge-response sequences, while the 1.5 KB OTP stores cryptographic look-up tables for proprietary protocols. Compared with 32-bit alternatives, the PIC16C5X core's predictable timing eliminates RTOS jitter in critical reader-to-card handshake windows.
موصى به
Battery-Powered Instrument Front-End
The PIC16C56AT-04E/SO suits handheld instruments like digital multimeters, infrared thermometers, and portable gas detectors where low cost and small footprint outweigh raw compute. Its 4 MHz core and 12 I/O pins drive segment LCDs via charge-pump circuits, read rotary-encoder knobs, and time battery shutoff via watchdog. Compared with more capable PIC16F1xxx parts, the PIC16C56AT-04E/SO delivers production-cost savings below $1.50 USD per unit at 1K quantities - critical for sub-$20 consumer test instruments competing in retail channels.
موصى به
LED Lighting Controller
The PIC16C56AT-04E/SO controls decorative and architectural LED installations including RGB strip drivers, DMX512 slave nodes, and Christmas light sequences. Its 12 I/O pins and hardware timer generate software PWM channels for color mixing and brightness control at up to 8-bit resolution per channel. The 1.5 KB program memory holds pattern tables, fade curves, and DMX address parsing logic. The wide -40C to +125C range supports outdoor IP65-rated fixtures where ambient temperatures swing from winter cold to summer sun exposure.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC16C56AT-04E/SO — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC16C56A-04E/SO | PIC16C55AT-04E/SO | PIC16C558-04E/SO | PIC16F56-I/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-SOIC | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same |
| Program Memory | 1.5 KB OTP | 1.5 KB OTP | 1 KB OTP (-33%) | 2 KB OTP (+33%) | 1.5 KB Flash (reprogrammable) |
| RAM | 25 bytes | 25 bytes | 24 bytes | 68 bytes | 25 bytes |
| Max Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz |
| I/O Pins | 12 | 12 | 12 | 13 | 12 |
| Program Memory Type | OTP | OTP | OTP | OTP | Flash |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +85C |
| Instruction Set Word | 12-bit | 12-bit | 12-bit | 14-bit | 12-bit |
أبرز الفروقات
- Extended -40C to +125C temperature range (مقابلPIC16F56-I/SO)
- Lowest unit cost in PIC16C5X family (مقابلPIC16C558-04E/SO)
- OTP memory protects against firmware tampering (مقابلPIC16F56-I/SO)
ملاحظات التصميم
Decouple VDD with a 0.1 uF ceramic capacitor placed within 5 mm of the VDD/VSS pins. The PIC16C5X core draws brief current spikes during instruction fetches; insufficient decoupling causes oscillator jitter and unexpected resets via the brown-out or MCLR paths. For battery-powered designs, add a 10 uF bulk electrolytic or tantalum on the VDD rail to handle inrush when relays or LED strings energize.
Route the crystal/oscillator traces as short as possible, with the load capacitors (typically 15-33 pF for low-speed crystals) placed close to OSC1 and OSC2. Keep oscillator traces away from switching traces and high-current outputs to minimize EMI coupling. If using an external clock source, drive only OSC1 and leave OSC2 floating per datasheet recommendations. The MCLR pin requires a 10 kohm pull-up to VDD - never leave it floating in production designs.
OTP memory cannot be erased or rewritten - verify firmware on a PIC16C56A-20/SO windowed ceramic-package variant or PIC16F56-I/SO Flash sibling before committing to production volume. Configuration bits (watchdog enable, oscillator selection, code protection, MCLR enable) are part of the program memory and must be set correctly - an unprogrammed device defaults to safe but unusable state. I/O pins default to input on power-up; configure TRIS registers before driving outputs.
The PIC16C5X I/O pins have limited sink/source capability (typically 25 mA per pin, 100 mA total). For driving relays, solenoids, or high-current LEDs, use external MOSFETs (2N7002 or similar) or driver ICs (ULN2003A) rather than loading the MCU outputs directly. When reading switch contacts, add 100 nF debounce capacitors in parallel or implement software debounce with a 5-10 ms timer to eliminate contact bounce artifacts.
معلومات الامتثال
RoHS compliant per Microchip product declaration. The 'E' suffix denotes extended -40C to +125C temperature grade, not automotive qualification; AEC-Q100 status not specified on the datasheet. Lead-free and halogen-free per package materials declaration.
