PIC17C43-25/L - 8KB OTP 8-bit MCU 25MHz 44-PLCC | Microchip
MPN: PIC17C43-25/L ✗ انتهى عمره الإنتاجيPIC17C43-25/L نظرة عامة
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (program + RAM), and programmable I/O peripherals on one die. The PIC17C family sits above PIC16C and below PIC18 in Microchip's 8-bit hierarchy, offering extended instruction set support and upward compatibility with PIC16C5X, PIC12CXXX, and PIC16CXX devices. The PIC17C43 specifically adds hardware multiply, additional banking, and a wider 16-bit instruction word to accelerate math-intensive control loops. In the broader taxonomy: microcontroller → 8-bit MCU → CMOS RISC microcontroller → embedded controller → semiconductor.
Key features include a 16-bit instruction word with only 58 single-word instructions, a 25 MHz internal clock yielding 121 ns minimum instruction cycle, hardware multiply, two 8-bit timers plus one 16-bit timer/counter, a USART, PWM module, watchdog timer with on-chip RC oscillator, and Power-On Reset (POR). The OTP program memory supports prototyping and low-to-medium volume production, while the wide operating voltage range of 4.5 V to 6 V covers standard 5 V logic rails.
Architecturally, the PIC17C43 uses a Harvard RISC core with separated program and data buses, enabling simultaneous instruction fetch and operand access. The 25 MHz / 25MIPS figure corresponds to the -25 speed grade; a -33 variant runs the same die at 33 MHz. CMOS EPROM cells provide non-volatile code storage but require UV erasure, making the part best suited to one-time-programmed production units rather than firmware-update applications.
Typical applications include industrial motor control, smart sensors, HVAC controllers, automotive body electronics (non-safety), and embedded control where deterministic 8-bit performance is sufficient. The PIC17C43 is recommended for designs migrating from PIC16C5X/PIC16CXX that need more code space and arithmetic throughput. Microchip recommends the PIC18F4220 as a newer Flash-based replacement for new designs.
When designing with PIC17C43-25/L, ensure the 5 V supply is well-regulated and bypassed with 0.1 µF + 10 µF capacitors near the VDD pins. The /L PLCC package requires a socket or proper reflow profile; because the OTP die cannot be reprogrammed, prototype code on a JW (windowed) ceramic part before committing to plastic PLCC production units.
This page synthesizes distributor pricing, same-family drop-in alternatives in the 44-PLCC footprint, and practical OTP-vs-Flash migration notes not collected in the manufacturer datasheet alone.
بدائل مباشرة لـ PIC17C43-25/L — 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/L (نفس عامل الشكل والبصمة) — يختلف في Package, Maximum Clock Frequency, Core Architecture, Operating Temperature, Program Memory Type.
PIC17C43-33/L
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17C43-16/L
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17C43-25E/L
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17C43-33I/L
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17C44-25/L
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC17C43-25/L الحدود القصوى والخصائص الكهربائية
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Instruction Set | 58 single-word instructions, 16-bit word |
| Program Memory | 8 KB OTP EPROM (4K × 16) |
| RAM | 454 bytes |
| Data EEPROM | Not present (code-EPROM device) |
| أقصى تردد للساعة | 25 MHz |
| MIPS Performance | 8.25 MIPS (121 ns instruction cycle) |
| I/O Pins | 33 |
| عرض ناقل البيانات | 16-bit instruction / 8-bit data |
| Supply Voltage (VDD) | 4.5 V to 6 V (5 V nominal) |
| Timers | 2 × 8-bit + 1 × 16-bit timer/counter |
| Communication | USART (asynchronous/synchronous) |
| PWM Channels | Yes (PWM module) |
| Watchdog Timer | Yes, with dedicated on-chip RC oscillator |
| Power-On Reset | Yes (POR) |
| درجة حرارة التشغيل | 0°C to +70°C (commercial) |
| العلبة | 44-pin PLCC (16.59 × 16.59 mm) |
| نوع التركيب | Surface Mount |
| نوع الذاكرة | OTP (One-Time Programmable) EPROM |
تكوين أطراف PIC17C43-25/L
| دبوس 1 | RA0/AN0 — Port A bit 0 / Analog input 0 |
| دبوس 2 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| دبوس 3 | RA2/AN2 — Port A bit 2 / Analog input 2 |
| دبوس 4 | RA3/AN3 — Port A bit 3 / Analog input 3 |
| دبوس 5 | RA4/AN4 — Port A bit 4 / Analog input 4 |
| دبوس 6 | RA5/AN5 — Port A bit 5 / Analog input 5 |
| دبوس 7 | RA6/AN6 — Port A bit 6 / Analog input 6 |
| دبوس 8 | RA7/AN7 — Port A bit 7 / Analog input 7 |
| دبوس 9 | RB0/INT — Port B bit 0 / External interrupt |
| دبوس 10 | RB1 — Port B bit 1 |
| دبوس 11 | RB2 — Port B bit 2 |
| دبوس 12 | RB3 — Port B bit 3 |
| دبوس 13 | RB4 — Port B bit 4 |
| دبوس 14 | RB5 — Port B bit 5 |
| دبوس 15 | RB6 — Port B bit 6 |
| دبوس 16 | RB7 — Port B bit 7 |
| دبوس 17 | VSS — Ground |
| دبوس 18 | VDD — Positive supply (5 V) |
| دبوس 19 | RC0 — Port C bit 0 |
| دبوس 20 | RC1 — Port C bit 1 |
| دبوس 21 | RC2 — Port C bit 2 |
| دبوس 22 | RC3 — Port C bit 3 |
| دبوس 23 | RC4 — Port C bit 4 |
| دبوس 24 | RC5 — Port C bit 5 |
| دبوس 25 | RC6 — Port C bit 6 |
| دبوس 26 | RC7 — Port C bit 7 |
| دبوس 27 | RD0 — Port D bit 0 |
| دبوس 28 | RD1 — Port D bit 1 |
| دبوس 29 | RD2 — Port D bit 2 |
| دبوس 30 | RD3 — Port D bit 3 |
| دبوس 31 | RD4 — Port D bit 4 |
| دبوس 32 | RD5 — Port D bit 5 |
| دبوس 33 | RD6 — Port D bit 6 |
| دبوس 34 | RD7 — Port D bit 7 |
| دبوس 35 | RE0 — Port E bit 0 |
| دبوس 36 | RE1 — Port E bit 1 |
| دبوس 37 | RE2 — Port E bit 2 |
| دبوس 38 | OSC1/CLKIN — Oscillator input / external clock |
| دبوس 39 | OSC2/CLKOUT — Oscillator output |
| دبوس 40 | MCLR — Master clear (reset) input |
| دبوس 41 | VSS — Ground |
| دبوس 42 | VDD — Positive supply (5 V) |
| دبوس 43 | NC — Not connected (per datasheet) |
| دبوس 44 | NC — Not connected (per datasheet) |
التطبيقات النموذجية
PIC17C43-25/L مناسب لـ 6 التطبيقs: Industrial Motor Control, Smart HVAC Controllers, Automotive Body Electronics, Embedded Sensor Hubs, Legacy Test and Measurement Fixtures, Point-of-Sale Terminal Peripherals.
Industrial Motor Control
The PIC17C43-25/L's 8.25 MIPS throughput and hardware multiply make it well suited to closed-loop DC and stepper motor control. The dedicated PWM module generates switching waveforms for H-bridge drivers, while the 16-bit timer/counter captures quadrature encoder feedback for position servo loops. The 33 I/O pins drive multiple enable, direction, and brake signals without external logic.
موصى به
Smart HVAC Controllers
HVAC control boards need deterministic 8-bit processing for thermostat loops, damper actuators, and sensor multiplexing. PIC17C43-25/L's 454-byte RAM handles small control tables and the USART talks to remote thermostats or BACnet modules. The 4.5-6 V supply aligns with legacy 5 V analog front-ends, and the industrial-temperature E grade variant (PIC17C43-25E/L) tolerates basement and rooftop enclosures.
موصى به
Automotive Body Electronics
Pre-CAN body controllers, mirror adjusters, seat controllers, and lighting modules historically used PIC17C43-25/L for non-safety functions. Its 5 V supply, 33 I/O pins, PWM module, and USART cover seat-motor drivers and lighting dimming tasks. For new designs, Microchip recommends migrating to PIC18F4220, but PIC17C43-25/L remains in service fleets for legacy vehicle maintenance.
موصى به
Embedded Sensor Hubs
Sensor aggregation boards in industrial cabinets use PIC17C43-25/L to poll multiple analog/digital sensors, run linearization math, and forward data over USART to a host controller. The 8 KB OTP holds calibration tables and modest control code; the 16-bit instruction word accelerates fixed-point math for thermocouple linearization. The Harvard RISC architecture delivers deterministic 121 ns instruction timing for tight polling loops.
موصى به
Legacy Test and Measurement Fixtures
ATE fixtures and bench testers in service for 15-20 years often contain PIC17C43-25/L for fixture control, multiplexed measurement switching, and handshake logic. The OTP memory locks calibrated test sequences, while the 25 MHz MIPS rate sustains real-time measurement multiplexing. Replacement boards must be pin-compatible 44-PLCC, making PIC17C43-33/L and PIC17C43-16/L the recommended drop-in choices.
موصى به
Point-of-Sale Terminal Peripherals
Older POS peripherals (Pole displays, cash-drawer controllers, magnetic-stripe readers) used PIC17C43-25/L for I/O expansion and serial protocol bridging. The USART talks RS-232/RS-485 to terminals, while the 33 I/O pins drive keypads, LEDs, and printer interfaces. The 5 V-only supply simplifies integration with legacy POS backplanes.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC17C43-25/L — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC17C43-33/L | PIC17C43-16/L | PIC17C43-25E/L | PIC17C43-33I/L | PIC17C44-25/L |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-PLCC (16.59 × 16.59 mm) | 44-PLCC - same | 44-PLCC - same | 44-PLCC - same | 44-PLCC - same | 44-PLCC - same |
| Maximum Clock | 25 MHz | 33 MHz | 16 MHz | 25 MHz | 33 MHz | 25 MHz |
| Program Memory | 8 KB OTP | 8 KB OTP | 8 KB OTP | 8 KB OTP | 8 KB OTP | 16 KB OTP |
| RAM | 454 bytes | 454 bytes | 454 bytes | 454 bytes | 454 bytes | 454 bytes |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| Supply Voltage | 4.5 V to 6 V | 4.5 V to 6 V | 4.5 V to 6 V | 4.5 V to 6 V | 4.5 V to 6 V | 4.5 V to 6 V |
| Operating Temperature | 0°C to +70°C | 0°C to +70°C | 0°C to +70°C | -40°C to +85°C (extended) | -40°C to +85°C (industrial) | 0°C to +70°C |
أبرز الفروقات
- 33 MHz speed upgrade on identical 44-PLCC footprint (مقابلPIC17C43-33/L)
- Extended temperature grade option in same package (مقابلPIC17C43-25E/L)
- Doubled program memory on identical footprint (مقابلPIC17C44-25/L)
ملاحظات التصميم
Decouple each VDD/VDD pair with a 0.1 µF ceramic + 10 µF electrolytic placed within 5 mm of the pins. The PIC17C43-25/L draws roughly 30 mA active at 25 MHz from a 5 V rail, with peaks up to 50 mA during EPROM programming. Add a ferrite bead on the supply trace if the design shares the rail with inductive loads (relays, motors). Hold MCLR high via a 10 kΩ pull-up to VDD with a 100 nF cap to ground for clean reset.
The OTP EPROM cannot be erased - any code error in production units means scrapped parts. Prototype on a PIC17C43/JW (windowed ceramic) variant to allow UV erasure, then commit OTP parts only after final firmware is locked. Watchdog timer uses a dedicated on-chip RC oscillator (not the system clock), so it keeps running even if the main oscillator stalls - enable it for any unattended deployment.
The 44-pin PLCC socket should be a low-profile machined-pin type (e.g. 3M Textool or equivalent) for reliable field replacement. Keep analog signals (AN0-AN7) on Port A routed away from PWM/Port C switching traces to avoid coupling. Use a 4-layer PCB with dedicated ground plane if the design combines analog sampling and PWM switching; on 2-layer boards, route analog inputs and digital I/O on opposite sides of the board.
معلومات الامتثال
PIC17C43-25/L was released before mandatory RoHS/REACH lead-free conversion; RoHS and lead-free status not confirmed in the verified web data. Marked as obsolete by Microchip with PIC18F4220 recommended as the Flash-based successor.
