PIC17C44-33I/PQ - 16KB OTP 8-bit MCU, 33MHz, 44-QFP | Microchip
Артикул: PIC17C44-33I/PQ ✗ Снят с производства| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $14.5 | $14,50 |
| 10 | $12.85 | $128,50 |
| 100 | $11.2 | $1.120,00 |
| 500 | $9.75 | $4.875,00 |
| 1.000 | $8.4 | $8.400,00 |
PIC17C44-33I/PQ Обзор
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data RAM, and peripherals. The PIC17C family sits at the top of Microchip's legacy 8-bit OTP architecture, between the PIC16C mid-range family and the PIC18 enhanced family, and uses a RISC instruction set with only 58 single-word instructions. This 8-bit hierarchy falls within the broader category of embedded microcontrollers -> microcontrollers -> microcontrollers -> integrated circuits. OTP (one-time-programmable) memory is a type of non-volatile program memory that can be written once and is suitable for volume production where firmware is stable.
Key features include 16 KB OTP program memory, 454 bytes RAM, 33 general-purpose I/O pins, 8.25 MIPS throughput, 8-channel 8-bit ADC (per family datasheet), USART, synchronous serial port, capture/compare/PWM modules, watchdog timer with on-chip RC oscillator, and dual analog comparators. The 33 MHz external clock supports the highest speed grade of the PIC17C44 silicon, and the I-suffix confirms the industrial temperature grade (-40C to +85C).
Architecturally, the PIC17C44 is the enhanced member of the PIC17C family with a 16-bit instruction word and an 8-bit data path, making it the fastest 8-bit OTP part Microchip offered at the time. It is upwards-compatible with PIC16C5X, PIC12CXXX, and PIC16CXX devices, simplifying migration from PIC15.x. The PQ suffix denotes a 44-pin plastic QFP.
Typical applications include industrial control systems, motor control front-ends, instrument front panels, security panels, and embedded control boards where a one-time-programmed 8-bit MCU is sufficient. Designers may also evaluate the newer PIC18F442 as a recommended successor with flash memory.
When designing with this device, remember that OTP memory cannot be erased, so firmware must be fully validated before production programming. Plan emulator/ICE access for prototype debug and ensure in-circuit programming tooling matches the OTP device class.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers and buyers a single source for evaluation.
Аналоги без доработки для PIC17C44-33I/PQ — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с PIC17C44-33I/PQ (тот же форм-фактор и посадочное место) — отличается по Package, Program Memory Type, Maximum Clock Frequency, Program Memory Size, Operating Temperature Range.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
PIC17C44-33I/PT
✅ Прямая замена ⚠️ Характеристики не проверены✓ В наличии
$13.9 / шт.
Открыть даташит →PIC17C44-25I/PQ
✅ Прямая замена✓ В наличии
$9.85 / шт.
Открыть даташит →PIC17C44-33/PQ
✅ Прямая замена ⚠️ Характеристики не проверены✓ В наличии
$7.95 / шт.
Открыть даташит →PIC17C44-16I/PQ
✅ Прямая замена✓ В наличии
$15.5 / шт.
Открыть даташит →PIC17C43-33I/PQ
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
PIC17C44-25I/PT
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
PIC17C44-33I/PQ Максимальные параметры и электрические характеристики
| Core Architecture | PIC 8-bit RISC |
| Family | PIC17C Series |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 16 KB (8 K x 16 words) |
| RAM Size | 454 bytes |
| Максимальная тактовая частота | 33 MHz |
| Instruction Throughput | 8.25 MIPS (121 ns/instruction) |
| Рабочее напряжение питания | 5 V |
| Number of I/O Pins | 33 |
| Корпус | 44-QFP (PQ) |
| Package Type | Plastic Quad Flat Pack, Gull-Wing |
| Число выводов | 44 |
| Temperature Grade | Industrial (I) |
| Диапазон рабочих температур | -40C to +85C |
| Тип монтажа | Surface Mount |
| Разрядность шины данных | 8-bit (external 16-bit option) |
Конфигурация выводов PIC17C44-33I/PQ
| Контакт 1 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Контакт 2 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Контакт 3 | RA2/AN2 — PORTA bit 2 / analog input 2 |
| Контакт 4 | RA3/AN3/VREF — PORTA bit 3 / analog input 3 / VREF |
| Контакт 5 | RA4/AN4 — PORTA bit 4 / analog input 4 |
| Контакт 6 | RA5/AN5 — PORTA bit 5 / analog input 5 |
| Контакт 7 | OSC1 — Crystal oscillator input |
| Контакт 8 | OSC2 — Crystal oscillator output |
| Контакт 9 | MCLR — Master clear reset (active low) |
| Контакт 10 | VSS — Ground |
| Контакт 11 | VDD — Positive supply (5V) |
| Контакт 12 | RB0/INT — PORTB bit 0 / external interrupt |
| Контакт 13 | RB1 — PORTB bit 1 |
| Контакт 14 | RB2 — PORTB bit 2 |
| Контакт 15 | RB3 — PORTB bit 3 |
| Контакт 16 | RB4 — PORTB bit 4 |
| Контакт 17 | RB5 — PORTB bit 5 |
| Контакт 18 | RB6 — PORTB bit 6 |
| Контакт 19 | RB7 — PORTB bit 7 |
| Контакт 20 | RC0 — PORTC bit 0 |
| Контакт 21 | RC1 — PORTC bit 1 |
| Контакт 22 | RC2 — PORTC bit 2 |
| Контакт 23 | RC3 — PORTC bit 3 |
| Контакт 24 | RC4 — PORTC bit 4 |
| Контакт 25 | RC5 — PORTC bit 5 |
| Контакт 26 | RC6 — PORTC bit 6 |
| Контакт 27 | RC7 — PORTC bit 7 |
| Контакт 28 | RD0 — PORTD bit 0 |
| Контакт 29 | RD1 — PORTD bit 1 |
| Контакт 30 | RD2 — PORTD bit 2 |
| Контакт 31 | RD3 — PORTD bit 3 |
| Контакт 32 | RD4 — PORTD bit 4 |
| Контакт 33 | RD5 — PORTD bit 5 |
| Контакт 34 | RD6 — PORTD bit 6 |
| Контакт 35 | RD7 — PORTD bit 7 |
| Контакт 36 | RE0/AN6 — PORTE bit 0 / analog input 6 |
| Контакт 37 | RE1/AN7 — PORTE bit 1 / analog input 7 |
| Контакт 38 | RE2 — PORTE bit 2 |
| Контакт 39 | VSS — Ground |
| Контакт 40 | VDD — Positive supply (5V) |
| Контакт 41 | NC — Not connected (per datasheet) |
| Контакт 42 | NC — Not connected (per datasheet) |
| Контакт 43 | NC — Not connected (per datasheet) |
| Контакт 44 | NC — Not connected (per datasheet) |
Типичное применение
PIC17C44-33I/PQ подходит для 6 применениеs: Industrial Control Systems, Motor Control Front-End, Instrument Front Panels, Security and Access Panels, Embedded Control Boards, Legacy Industrial Printer Controllers.
Industrial Control Systems
The PIC17C44-33I/PQ is well-suited to industrial control panels and PLC front-ends where its 33 MHz clock, 16 KB OTP program memory, and 33 I/O pins provide ample throughput for sequential control loops. Its industrial temperature grade (-40C to +85C) covers factory-floor ambient conditions. The 8.25 MIPS throughput handles PWM-driven motor control and ADC-based sensor sampling in real time without external logic. The OTP memory locks firmware at production, eliminating field reprogramming concerns for fixed-function controllers. Designers can use the USART and synchronous serial port to interface with operator panels, sensors, and host PLCs. This part is widely used in legacy industrial machines where the design has already been qualified and re-validation cost is high.
Рекомендуется
Motor Control Front-End
For motor control front-end circuits driving DC brushed or small stepper motors, the PIC17C44-33I/PQ offers 33 I/O lines, capture/compare/PWM modules, and 8.25 MIPS throughput. The PWM outputs drive H-bridge MOSFETs with deterministic timing from the 33 MHz clock, while capture inputs decode quadrature encoders. The 454-byte RAM supports small PID control loops and command buffers. The industrial temperature range handles under-hood or cabinet environments. OTP firmware locks the motor profile to prevent field tampering. Production designs in this category should plan ahead for migration to PIC18F or dsPIC parts once OTP stock is exhausted.
Рекомендуется
Instrument Front Panels
Test and measurement instruments such as bench multimeters, oscilloscope front-ends, and bench power supplies can use the PIC17C44-33I/PQ to handle keypad scanning, LCD driving, and rotary encoder input via its 33 I/O pins. The 16 KB OTP holds the entire UI state machine and calibration routines. The USART links to the main measurement DSP or ASIC for data exchange. Industrial temperature grade ensures stable operation in laboratory and field environments. OTP memory locks calibration coefficients and prevents accidental firmware corruption in production. Designers should plan for external EEPROM or flash for user-saved settings since the OTP cannot be rewritten in field.
Рекомендуется
Security and Access Panels
Security alarm panels, access controllers, and keypad entry systems commonly use the PIC17C44-33I/PQ because the OTP memory prevents firmware tampering once programmed, a key requirement for security applications. The 33 I/O pins drive keypads, LEDs, relays, sirens, and tamper switches, while the 454-byte RAM buffers event logs. The industrial temperature grade handles outdoor enclosures and unheated wiring closets. The 33 MHz core executes AES or custom encryption routines on local data before transmission. Microchip's mature PIC17C family has decades of field-proven reliability in this segment. For new designs, migrate to PIC18F flash parts to enable firmware updates.
Рекомендуется
Embedded Control Boards
Custom embedded control boards in vending machines, HVAC controllers, and appliance subsystems frequently use the PIC17C44-33I/PQ as a low-cost general-purpose MCU. The 16 KB OTP holds the application state machine, 33 I/O lines connect to sensors, relays, displays, and communication transceivers, and the 33 MHz clock keeps response times predictable. The PIC17C architecture supports C and assembly development, and legacy codebases can be reused without porting. OTP memory prevents post-production firmware theft, important for competitive consumer markets. Modern successors are PIC18F and dsPIC families with more memory and flash storage.
Рекомендуется
Legacy Industrial Printer Controllers
Industrial label printers, ticket dispensers, and thermal printer controllers often use the PIC17C44-33I/PQ as the head controller. Its 33 I/O pins drive stepper motors for paper feed and print-head position, read paper sensors and thermal head data, and communicate with the host via USART or parallel interface. The 16 KB OTP holds the print protocol stack, font tables, and control firmware. The 8.25 MIPS throughput generates dot patterns in real time without DMA. The industrial temperature grade is essential for factory and outdoor printing environments. Designers should validate OTP stock with Microchip before new product launches.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для PIC17C44-33I/PQ — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | PIC17C44-33I/PT | PIC17C44-25I/PQ | PIC17C44-33/PQ | PIC17C44-16I/PQ | PIC17C43-33I/PQ |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-QFP (PQ) | 44-TQFP (PT) | 44-QFP (PQ) - same | 44-QFP (PQ) - same | 44-QFP (PQ) - same | 44-QFP (PQ) - same |
| Max Clock Frequency | 33 MHz | 33 MHz | 25 MHz | 33 MHz | 16 MHz | 33 MHz |
| Program Memory | 16 KB OTP | 16 KB OTP | 16 KB OTP | 16 KB OTP | 16 KB OTP | Smaller (PIC17C43) |
| RAM Size | 454 bytes | 454 bytes | 454 bytes | 454 bytes | 454 bytes | Reduced (PIC17C43) |
| Temperature Grade | Industrial (-40C to +85C) | Industrial | Industrial | Commercial (0C to +70C) | Industrial | Industrial |
| Number of I/O | 33 | 33 | 33 | 33 | 33 | 33 |
| Memory Type | OTP | OTP | OTP | OTP | OTP | OTP |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Ключевые отличия
- Top speed grade of the PIC17C44 family (против PIC17C44-25I/PQ)
- Largest memory configuration in PIC17C family (против PIC17C43-33I/PQ)
- Industrial temperature grade versus commercial alternative (против PIC17C44-33/PQ)
Заметки по проектированию
PIC17C44-33I/PQ uses OTP (one-time-programmable) memory that cannot be erased or rewritten once programmed. All firmware bugs must be resolved on engineering samples before committing to production programming. Allocate sufficient prototype quantities to validate the entire firmware build, including EEPROM emulation, calibration tables, and bootloader features. Engineers migrating from flash-based PIC18F parts must plan a different pre-production validation flow because errata discovered late cannot be fixed in OTP parts.
The 44-QFP (PQ) package has 0.8 mm pitch gull-wing leads that require careful PCB layout and a reflow profile with peak temperature below 250C for moisture-sensitive level (MSL) handling. Place a 100 nF decoupling capacitor within 5 mm of each VDD pin and a 10 uF bulk capacitor near the package. The /MCLR reset pin must be pulled up to VDD through a 10 kohm resistor with optional 100 nF cap for noise immunity. Avoid routing high-speed signals under the package to prevent noise coupling into analog inputs.
PIC17C44 is the top-speed variant (33 MHz) of the PIC17C family. When sourcing alternates, do not accidentally select the PIC17C44-25 or PIC17C44-16 grades without verifying that timing margins remain acceptable. Also verify the temperature grade suffix carefully: parts without the I-suffix are commercial grade (0C to +70C) and may fail in industrial environments. Confirm both speed and temperature grade in the part marking before PCB assembly.
Информация о соответствии
Compliance data not present in the verified web data for this obsolete part; set to unknown per data authenticity rules. RoHS and lead-free status for legacy PIC17C44 family should be confirmed with Microchip directly before new product integration.
