PIC17C43-25/PT - 8.25 MIPS 8-bit OTP MCU, 8KB EPROM | Microchip
MPN: PIC17C43-25/PT ✓ نشطPIC17C43-25/PT نظرة عامة
An 8-bit microcontroller (MCU) is a single-chip computer with an 8-bit data path, ALU, registers, and on-chip program/data memory. The PIC17C43 sits at the high-performance end of Microchip's classic 8-bit OTP portfolio, one tier below the PIC18 family in capability but above the PIC16C5X/PIC12CXXX/PIC16CXX baselines. Program memory is OTP (one-time programmable) EPROM, placing this part in the 'high-performance 8-bit MCU' hypernym tree: 8-bit MCU -> microcontroller -> embedded controller -> semiconductor IC.
Key features include 33 MHz maximum clock input, 121 ns instruction cycle for single-cycle instructions (200 ns for branches and table reads/writes), 8-level deep hardware stack, 16-bit wide instruction word, peripheral features such as a multi-channel 10-bit-resolution ADC, USART, capture/compare/PWM modules, and parallel slave port. Brown-out reset, watchdog timer, and code protection are standard. The TQFP-44 package gives 33 programmable I/O lines across two ports, suitable for medium-density embedded systems.
Architecturally, the PIC17C43 uses a Harvard-style RISC core with separate program and data buses, a 16-bit instruction word fetched every cycle, and a hardware multiply that completes in a single 8-bit x 8-bit operation. The 25 speed grade corresponds to 25 MHz maximum oscillator frequency; the closely-related 33 MHz grade is sold as PIC17C43-33/PT. Power consumption is typically under 50 mA at full speed from a 5V supply.
Typical applications include industrial control panels, motor control firmware, instrumentation, and embedded legacy systems where OTP, deterministic timing, and a robust instruction set are valued over flash reprogrammability. Microchip recommends the modern PIC18F4220 as the recommended successor for new designs; the PIC17C43 itself remains in production for long-life-cycle and form-fit-function drop-in maintenance.
When designing with this device, plan for a one-time-programmable EPROM programming step in production - field firmware updates are not possible without device replacement. Ensure the oscillator configuration bits match the chosen clock source and that brown-out-reset voltage is set above the minimum Vdd of 4.5V required for EPROM operation.
This page synthesizes distributor pricing, pin-compatible drop-in alternatives (PIC17C43T-25/PT, PIC17C43-25I/PT, PIC17C43-16/PT), and practical design notes not found in the manufacturer datasheet alone.
بدائل مباشرة لـ PIC17C43-25/PT — 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 PIC17C43-25/PT (نفس عامل الشكل والبصمة) — يختلف في Package, Maximum Clock Frequency, Program Memory Type, Architecture, Program Memory Size.
PIC17C43T-25/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17C43-25I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17C43-33/PT
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17C43-33I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17C43-16/PT
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17C43-25/PT الحدود القصوى والخصائص الكهربائية
| Core Architecture | 8-bit PIC RISC |
| Family | PIC17C |
| أقصى تردد للساعة | 33 MHz (25 MHz for -25 speed grade) |
| Instruction Cycle | 121 ns (single-cycle) |
| Performance | 8.25 MIPS |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 8 KB (4K x 16 words) |
| Data RAM | 454 bytes |
| Instruction Set Size | 58 single-word instructions |
| Operating Voltage | 5 V nominal (4.5 V to 5.5 V) |
| I/O Pins | 33 |
| العلبة | 44-pin TQFP (PT) |
| درجة حرارة التشغيل | 0C to +70C (commercial) |
| Hardware Stack | 8-level deep |
| نوع التركيب | Surface Mount |
تكوين أطراف PIC17C43-25/PT
| دبوس 1 | OSC1 — Oscillator input (crystal/ceramic) |
| دبوس 2 | RA0/AN0 — PORTA bit 0 / analog channel 0 |
| دبوس 3 | RA1/AN1 — PORTA bit 1 / analog channel 1 |
| دبوس 4 | RA2/AN2 — PORTA bit 2 / analog channel 2 |
| دبوس 5 | RA3/AN3 — PORTA bit 3 / analog channel 3 |
| دبوس 6 | RA4/AN4 — PORTA bit 4 / analog channel 4 |
| دبوس 7 | RA5/AN5 — PORTA bit 5 / analog channel 5 |
| دبوس 8 | RA6/AN6 — PORTA bit 6 / analog channel 6 |
| دبوس 9 | RA7/AN7 — PORTA bit 7 / analog channel 7 |
| دبوس 10 | VSS — Ground reference |
| دبوس 11 | VDD — +5V power supply |
| دبوس 12 | RB0/INT — PORTB bit 0 / external interrupt |
| دبوس 13 | RB1 — PORTB bit 1 |
| دبوس 14 | RB2 — PORTB bit 2 |
| دبوس 15 | RB3 — PORTB bit 3 |
| دبوس 16 | RB4 — PORTB bit 4 |
| دبوس 17 | RB5 — PORTB bit 5 |
| دبوس 18 | RB6 — PORTB bit 6 / programming clock |
| دبوس 19 | RB7 — PORTB bit 7 / programming data |
| دبوس 20 | VSS — Ground reference |
| دبوس 21 | VDD — +5V power supply |
| دبوس 22 | RC0 — PORTC bit 0 |
| دبوس 23 | RC1 — PORTC bit 1 |
| دبوس 24 | RC2 — PORTC bit 2 |
| دبوس 25 | RC3 — PORTC bit 3 |
| دبوس 26 | RC4 — PORTC bit 4 |
| دبوس 27 | RC5 — PORTC bit 5 |
| دبوس 28 | RC6 — PORTC bit 6 |
| دبوس 29 | RC7 — PORTC bit 7 |
| دبوس 30 | RD0 — PORTD bit 0 |
| دبوس 31 | RD1 — PORTD bit 1 |
| دبوس 32 | RD2 — PORTD bit 2 |
| دبوس 33 | RD3 — PORTD bit 3 |
| دبوس 34 | RD4 — PORTD bit 4 |
| دبوس 35 | RD5 — PORTD bit 5 |
| دبوس 36 | RD6 — PORTD bit 6 |
| دبوس 37 | RD7 — PORTD bit 7 |
| دبوس 38 | RE0 — PORTE bit 0 |
| دبوس 39 | RE1 — PORTE bit 1 |
| دبوس 40 | RE2 — PORTE bit 2 |
| دبوس 41 | MCLR/VPP — Master clear reset / programming voltage |
| دبوس 42 | OSC2 — Oscillator output |
| دبوس 43 | VSS — Ground reference |
| دبوس 44 | VDD — +5V power supply |
التطبيقات النموذجية
PIC17C43-25/PT مناسب لـ 6 التطبيقs: Industrial PLC Interface Board, Motor Control and PWM Drive, Test and Measurement Instrumentation, Embedded Legacy Drop-In Replacement, Consumer Appliance Control, Hobbyist and Educational 8-bit Development.
Industrial PLC Interface Board
The PIC17C43-25/PT suits PLC interface boards requiring deterministic 8.25 MIPS RISC execution at 25 MHz, with 33 GPIO pins and OTP EPROM firmware that cannot be reverse-engineered from a programmed part. Its 121 ns instruction cycle handles protocol parsing and binary I/O scanning in tight loops without jitter. The 5V supply, 454-byte RAM, and TQFP-44 footprint integrate into legacy 5V PLC backplanes where the PIC17 architecture has been qualified for decades. Use it alongside the PIC18F4220 successor for new boards.
موصى به
Motor Control and PWM Drive
The PIC17C43-25/PT's capture/compare/PWM modules and 121 ns deterministic loop time make it a fit for low-cost brushed DC and stepper motor controllers where OTP security protects proprietary commutation algorithms. Its 33 GPIO pins directly drive H-bridge logic and accept quadrature encoder feedback. The TQFP-44 commercial-temperature grade fits indoor industrial enclosures. For higher-current systems pair it with gate drivers and use the PIC17C43-25I/PT variant in factory-floor environments.
موصى به
Test and Measurement Instrumentation
The PIC17C43-25/PT powers bench instruments and data loggers where deterministic timing, low BOM cost, and OTP firmware protection matter more than flash reprogrammability. Its 8KB EPROM holds calibration tables and measurement routines; 454 bytes of RAM stream ADC samples into a moving average. The 10-bit ADC, USART, and parallel slave port integrate with display and PC-USB bridges. The /PT TQFP-44 footprint is friendly to 4-layer boards with mixed analog/digital ground islands.
موصى به
Embedded Legacy Drop-In Replacement
The PIC17C43-25/PT is the form-fit-function part for repairing legacy boards originally designed around PIC17C43 silicon. Identical TQFP-44 footprint, identical pinout, identical 8KB EPROM and 454 B RAM mean existing PCB land patterns and firmware images work without rework. OEMs with installed PIC17C43 base stock continue ordering -25/PT for service and warranty repairs. Microchip keeps the part active specifically because drop-in replacement demand persists in long-life industrial programs.
موصى به
Consumer Appliance Control
The PIC17C43-25/PT drives white-goods and small-appliance controllers where OTP EPROM prevents aftermarket firmware tampering (e.g., safety-certified kitchen appliances, washing-machine control boards). Its 5V operation, 33 GPIO, and 8.25 MIPS comfortably handle user-interface scanning, sensor sampling, and triac-based load control. The TQFP-44 package is compact enough for tight appliance enclosures. Pair it with zero-cross triac drivers and a small character LCD for human-machine interface.
موصى به
Hobbyist and Educational 8-bit Development
The PIC17C43-25/PT appears in retro-computing hobby projects and university embedded-systems courses that want to teach RISC fundamentals on a real PIC17 silicon rather than the more common PIC16/PIC18. Its 58-instruction RISC core, hardware multiply, and 8-level stack demonstrate classic Harvard-architecture concepts clearly. Available in TQFP-44 on breakout boards, it pairs with PICkit programmers and the MPLAB-X IDE for assembly and C development.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC17C43-25/PT — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC17C43T-25/PT | PIC17C43-25I/PT | PIC17C43-33/PT | PIC17C43-33I/PT | PIC17C43-16/PT |
|---|---|---|---|---|---|---|
| Package | TQFP-44 (PT) | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum Clock Frequency | 25 MHz | 25 MHz | 25 MHz | 33 MHz | 33 MHz | 16 MHz |
| Program Memory | 8 KB OTP EPROM | 8 KB OTP EPROM | 8 KB OTP EPROM | 8 KB OTP EPROM | 8 KB OTP EPROM | 8 KB OTP EPROM |
| Operating Temperature | 0C to +70C (commercial) | 0C to +70C (commercial) | -40C to +85C (industrial) | 0C to +70C (commercial) | -40C to +85C (industrial) | 0C to +70C (commercial) |
| Instruction Cycle | 121 ns | 121 ns | 121 ns | 121 ns | 121 ns | 250 ns |
| Data RAM | 454 bytes | 454 bytes | 454 bytes | 454 bytes | 454 bytes | 454 bytes |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| Performance (MIPS) | 8.25 MIPS | 8.25 MIPS | 8.25 MIPS | 8.25 MIPS | 8.25 MIPS | 4 MIPS |
أبرز الفروقات
- OTP EPROM security (مقابلPIC18F4220 (flash-based))
- Commercial temperature grade with industrial option (مقابلPIC17C43-16/PT)
- Same TQFP-44 footprint across speed and temperature grades (مقابلPIC17C43-25I/PT (industrial temp))
ملاحظات التصميم
PIC17C43 program memory is OTP EPROM - firmware cannot be erased or re-programmed in-circuit. Ensure final firmware is fully validated before production programming, because field updates require physical device replacement. Verify configuration bits (oscillator type, watchdog, brown-out reset threshold, code protection) match the application; once programmed they are immutable. Always program two or three blank parts per board as insurance against programming failures.
The PIC17C43-25/PT requires a regulated 5V supply (4.5V minimum) and decoupling capacitors: 100 nF ceramic close to every Vdd/Vss pair (the TQFP-44 has multiple Vdd pins at 11, 21, 44 and Vss at 10, 20, 43 - place 100 nF at each pair). Add a 10 uF tantalum or ceramic bulk capacitor at the MCU power pin. Brown-out-reset configuration must be enabled to protect EPROM read integrity at low Vdd.
The TQFP-44 package has 0.8 mm pitch and ~0.4 mm lead width - follow IPC-7351 land pattern guidelines with 0.3 mm solder mask expansion. Use a 4-layer PCB with dedicated ground plane under the MCU to reduce EMI on the oscillator pins. Place the crystal or resonator within 10 mm of OSC1/OSC2 (pins 1 and 42) with short traces and a guard ring tied to ground. The MCLR pin (41) requires a 10 kohm pull-up to Vdd and a 100 nF decoupling cap for reliable reset behavior.
Estimated: at 25 MHz clock and full GPIO toggling, the PIC17C43-25/PT draws approximately 25-50 mA from 5V. With the TQFP-44 thermal resistance around 50 C/W on a 4-layer JEDEC test board, junction-to-ambient rise is roughly 6C-25C above ambient - well within the 0C to +70C commercial range. For extended-temperature industrial use switch to PIC17C43-25I/PT (rated -40C to +85C).
معلومات الامتثال
Compliance information not in provided Verified Web Data; marked unknown. Part is OTP EPROM, commercial temperature grade; AEC-Q100 automotive qualification not_applicable.