PIC17C44-33I/PQ - 16KB OTP 8-bit MCU, 33MHz, 44-QFP | Microchip
부품 번호: PIC17C44-33I/PQ ✗ 단종| 수량 | 단가 | 합계 |
|---|---|---|
| 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 개요
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.
드롭인 대체품: PIC17C44-33I/PQ — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: PIC17C44-33I/PQ (동일 폼 팩터 및 풋프린트) — 차이점: Package, Program Memory Type, Maximum Clock Frequency, Program Memory Size, Operating Temperature Range.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
PIC17C44-33I/PT
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$13.9 / 개
데이터시트 보기 →PIC17C44-25I/PQ
✅ 드롭인✓ 재고 있음
$9.85 / 개
데이터시트 보기 →PIC17C44-33/PQ
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$7.95 / 개
데이터시트 보기 →PIC17C44-16I/PQ
✅ 드롭인✓ 재고 있음
$15.5 / 개
데이터시트 보기 →PIC17C43-33I/PQ
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
PIC17C44-25I/PT
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
PIC17C44-33I/PQ 최대 정격 & 전기적 특성
| 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 |
| 최대 클록 주파수 | 33 MHz |
| Instruction Throughput | 8.25 MIPS (121 ns/instruction) |
| 동작 공급 전압 | 5 V |
| Number of I/O Pins | 33 |
| 패키지 | 44-QFP (PQ) |
| Package Type | Plastic Quad Flat Pack, Gull-Wing |
| 핀 수 | 44 |
| Temperature Grade | Industrial (I) |
| 동작 온도 범위 | -40C to +85C |
| 실장 유형 | Surface Mount |
| 데이터 버스 폭 | 8-bit (external 16-bit option) |
PIC17C44-33I/PQ 핀 구성
| 핀 1 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| 핀 2 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| 핀 3 | RA2/AN2 — PORTA bit 2 / analog input 2 |
| 핀 4 | RA3/AN3/VREF — PORTA bit 3 / analog input 3 / VREF |
| 핀 5 | RA4/AN4 — PORTA bit 4 / analog input 4 |
| 핀 6 | RA5/AN5 — PORTA bit 5 / analog input 5 |
| 핀 7 | OSC1 — Crystal oscillator input |
| 핀 8 | OSC2 — Crystal oscillator output |
| 핀 9 | MCLR — Master clear reset (active low) |
| 핀 10 | VSS — Ground |
| 핀 11 | VDD — Positive supply (5V) |
| 핀 12 | RB0/INT — PORTB bit 0 / external interrupt |
| 핀 13 | RB1 — PORTB bit 1 |
| 핀 14 | RB2 — PORTB bit 2 |
| 핀 15 | RB3 — PORTB bit 3 |
| 핀 16 | RB4 — PORTB bit 4 |
| 핀 17 | RB5 — PORTB bit 5 |
| 핀 18 | RB6 — PORTB bit 6 |
| 핀 19 | RB7 — PORTB bit 7 |
| 핀 20 | RC0 — PORTC bit 0 |
| 핀 21 | RC1 — PORTC bit 1 |
| 핀 22 | RC2 — PORTC bit 2 |
| 핀 23 | RC3 — PORTC bit 3 |
| 핀 24 | RC4 — PORTC bit 4 |
| 핀 25 | RC5 — PORTC bit 5 |
| 핀 26 | RC6 — PORTC bit 6 |
| 핀 27 | RC7 — PORTC bit 7 |
| 핀 28 | RD0 — PORTD bit 0 |
| 핀 29 | RD1 — PORTD bit 1 |
| 핀 30 | RD2 — PORTD bit 2 |
| 핀 31 | RD3 — PORTD bit 3 |
| 핀 32 | RD4 — PORTD bit 4 |
| 핀 33 | RD5 — PORTD bit 5 |
| 핀 34 | RD6 — PORTD bit 6 |
| 핀 35 | RD7 — PORTD bit 7 |
| 핀 36 | RE0/AN6 — PORTE bit 0 / analog input 6 |
| 핀 37 | RE1/AN7 — PORTE bit 1 / analog input 7 |
| 핀 38 | RE2 — PORTE bit 2 |
| 핀 39 | VSS — Ground |
| 핀 40 | VDD — Positive supply (5V) |
| 핀 41 | NC — Not connected (per datasheet) |
| 핀 42 | NC — Not connected (per datasheet) |
| 핀 43 | NC — Not connected (per datasheet) |
| 핀 44 | NC — Not connected (per datasheet) |
일반적인 애플리케이션
PIC17C44-33I/PQ 적합 용도: 6 애플리케이션s: 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.
추천
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.
추천
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.
추천
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.
추천
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.
추천
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.
추천
추천 제품 요약
엔지니어링 참조 데이터: PIC17C44-33I/PQ — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | 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 |
주요 차별점
- Top speed grade of the PIC17C44 family (vs PIC17C44-25I/PQ)
- Largest memory configuration in PIC17C family (vs PIC17C43-33I/PQ)
- Industrial temperature grade versus commercial alternative (vs PIC17C44-33/PQ)
설계 노트
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.
규정 준수 정보
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.
