PIC17LC43-08/PT - 8KB OTP 8-bit MCU, 33MHz, TQFP-44 | Microchip
MPN: PIC17LC43-08/PT ✗ انتهى عمره الإنتاجيPIC17LC43-08/PT نظرة عامة
Background: An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, digital I/O, and on-chip peripherals such as timers, UARTs, and A/D converters. The PIC17 family sits between Microchip's baseline PIC12/PIC16 lines and the higher-end PIC18 line, offering RISC performance with a 16-bit instruction word and 8-bit data path. OTP (One-Time Programmable) microcontrollers use EPROM cells that can be electrically written once during production programming, contrasting with flash-based parts that support in-system re-programming.
Key features of the PIC17LC43-08/PT include: 33 MHz maximum clock input with 121 ns instruction cycle, 8 KB OTP program memory, 454 bytes of general-purpose RAM, 33 bidirectional I/O pins, 2.5 V to 5.5 V single-supply operation, and the classic PIC17C43 peripheral set including timers, capture/compare/PWM, and serial I/O. Compared to PIC16F predecessors at the same clock, the 17C43 offers higher throughput and a wider 16-bit instruction word for more efficient code density.
Typical applications include industrial control logic, motor drive signal conditioning, embedded instrumentation, automotive body electronics, and consumer appliance controllers where a TQFP surface-mount package, OTP memory, and PIC17C43 software compatibility are required. The 33 I/O lines allow direct interfacing to keypads, displays, sensors, and power-driver stages without external glue logic.
When designing with this part, plan for OTP programming infrastructure or contract assembly. The TQFP-44 footprint requires careful PCB thermal relief and trace routing for fine-pitch 0.8 mm leads. Designers migrating from PIC16C/PIC16F code should review the PIC17C43 instruction-set differences (16-bit opcode, multi-cycle branches) and revise the linker/startup files accordingly.
بدائل مباشرة لـ PIC17LC43-08/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 PIC17LC43-08/PT (نفس عامل الشكل والبصمة) — يختلف في Package, Program Memory Size, Program Memory Type, Core Architecture, Maximum Clock Frequency.
PIC17C43-16I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17C43T-16/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17C43-25E/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17C43T-25I/PQ
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17C44-16I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17LC43-08/PT الحدود القصوى والخصائص الكهربائية
| Architecture | 8-bit PIC17C RISC |
| Instruction Set | 58 single-word instructions |
| Instruction Cycle | 121 ns (single cycle) |
| أقصى تردد للساعة | 33 MHz |
| عرض ناقل البيانات | 16 bit (instruction) / 8 bit (data) |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 8 KB |
| RAM Size | 454 bytes |
| I/O Pins | 33 |
| جهد التغذية | 2.5 V to 5.5 V |
| ROM Type | OTP (One-Time Programmable) |
| العلبة | TQFP-44 (PT) 10x10 mm |
| Temperature Grade | Commercial |
| Terminal Form | Gull Wing |
| No. of Terminals | 44 |
| نوع التركيب | Surface Mount |
| Life Cycle Stage | Obsolete (legacy part) |
| MIPS Rating | 8.25 MIPS |
تكوين أطراف PIC17LC43-08/PT
| 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/VREF — Port A bit 3 / analog input 3 / voltage reference |
| دبوس 5 | RA4/T0CKI — Port A bit 4 / Timer 0 clock input |
| دبوس 6 | RA5/SS — Port A bit 5 / SPI slave select |
| دبوس 7 | OSC1/CLKIN — Oscillator input / external clock |
| دبوس 8 | OSC2/CLKOUT — Oscillator output |
| دبوس 9 | MCLR/VPP — Master clear reset / programming voltage |
| دبوس 10 | VSS — Ground reference |
| دبوس 11 | VDD — Positive supply voltage |
| دبوس 12 | RB0/INT — Port B bit 0 / external interrupt |
| دبوس 13 | RB1 — Port B bit 1 |
| دبوس 14 | RB2 — Port B bit 2 |
| دبوس 15 | RB3 — Port B bit 3 |
| دبوس 16 | RB4 — Port B bit 4 |
| دبوس 17 | RB5 — Port B bit 5 |
| دبوس 18 | RB6/ICSPCLK — Port B bit 6 / ICSP clock |
| دبوس 19 | RB7/ICSPDAT — Port B bit 7 / ICSP data |
| دبوس 20 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer 1 I/O |
| دبوس 21 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer 1 oscillator / CCP2 |
| دبوس 22 | RC2/CCP1 — Port C bit 2 / CCP1 PWM output |
| دبوس 23 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| دبوس 24 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| دبوس 25 | RC5/SDO — Port C bit 5 / SPI data out |
| دبوس 26 | RC6/TX/CK — Port C bit 6 / UART transmit / clock |
| دبوس 27 | RC7/RX/DT — Port C bit 7 / UART receive / data |
| دبوس 28 | RD0 — Port D bit 0 |
| دبوس 29 | RD1 — Port D bit 1 |
| دبوس 30 | RD2 — Port D bit 2 |
| دبوس 31 | RD3 — Port D bit 3 |
| دبوس 32 | RD4 — Port D bit 4 |
| دبوس 33 | RD5 — Port D bit 5 |
| دبوس 34 | RD6 — Port D bit 6 |
| دبوس 35 | RD7 — Port D bit 7 |
| دبوس 36 | RE0/RD — Port E bit 0 / parallel-port read |
| دبوس 37 | RE1/WR — Port E bit 1 / parallel-port write |
| دبوس 38 | RE2/CS — Port E bit 2 / parallel-port chip select |
| دبوس 39 | AVSS — Analog ground |
| دبوس 40 | AVDD — Analog positive supply |
| دبوس 41 | NC — Not connected (per datasheet) |
| دبوس 42 | NC — Not connected (per datasheet) |
| دبوس 43 | VSS — Ground reference |
| دبوس 44 | VDD — Positive supply voltage |
التطبيقات النموذجية
PIC17LC43-08/PT مناسب لـ 6 التطبيقs: Industrial Control Logic, Embedded Instrumentation, Motor Drive Signal Conditioning, Consumer Appliance Controllers, Automotive Body Electronics (Legacy), Point-of-Sale Terminal Peripherals.
Industrial Control Logic
The PIC17LC43-08/PT fits industrial control logic boards where deterministic 8-bit execution, OTP security, and a TQFP-44 surface-mount footprint are required. Its 8.25 MIPS throughput at 33 MHz handles PID loops, state machines, and HMI scanning at cycle times under 1 ms, while 33 I/O lines directly drive relays, optocouplers, and keypads without external mux logic. The 2.5 V to 5.5 V supply enables direct interface to 3.3 V sensors and 5 V driver stages, simplifying the power tree on factory-floor PLCs.
موصى به
Embedded Instrumentation
Bench-top and field instruments benefit from the PIC17LC43-08/PT's compact TQFP-44 package and PIC17C43 peripheral set. The MCU drives character LCDs, scans keypads, and streams measurement data over UART to a host PC, while OTP memory protects calibration tables from field tampering. With 454 bytes of RAM, the device buffers sample streams from external ADCs and supports interrupt-driven acquisition; the 121 ns instruction cycle keeps timing jitter under one microsecond for precision trigger logic.
موصى به
Motor Drive Signal Conditioning
In small BLDC and stepper motor controllers, the PIC17LC43-08/PT generates PWM, captures Hall-sensor feedback, and sequences commutation in real time. Its 33 I/O lines support 3-phase gate drivers, current-sense amplifiers, and tachometer inputs, while the 8 MIPS core runs vector-control loops at 10 kHz with comfortable margin. The OTP memory locks the motor-control firmware at production, preventing field re-tuning and IP exposure. TQFP-44 mounts cleanly on the driver board alongside the power stage.
موصى به
Consumer Appliance Controllers
White-goods and small-appliance control boards use the PIC17LC43-08/PT for user-interface scanning, temperature sensing, and load switching. OTP memory suits appliances where firmware is finalized at production and BOM cost is critical, while 2.5 V to 5.5 V operation matches battery-backed and 5 V mains-rectified rails. The 33 I/O lines drive seven-segment displays, touch keypads, triac optos, and buzzer PWM, consolidating what would otherwise require external logic on a single chip.
موصى به
Automotive Body Electronics (Legacy)
Pre-CAN automotive body modules (window lift, mirror, seat controller) historically used the PIC17LC43-08/PT for its compact TQFP-44 footprint and OTP-secured firmware. With 33 I/O lines, the MCU scans switches, drives small motors, and handles LIN-slave or simple PWM signaling at body-electronics data rates. Note that modern automotive designs require AEC-Q100 qualification, which the legacy PIC17LC43-08/PT does not carry - new designs should migrate to PIC18F or dsPIC33 AEC-Q100 alternatives.
موصى به
Point-of-Sale Terminal Peripherals
POS peripherals such as barcode scanners, customer displays, and receipt-printer controllers leverage the PIC17LC43-08/PT for keyboard scanning, serial I/O to the host terminal, and OTP-secured firmware storage. The 8.25 MIPS throughput decodes 1D/2D barcode streams in real time, while 33 I/O lines drive LCD modules, piezo buzzers, and indicator LEDs. OTP memory prevents cloning of the peripheral firmware, an important security consideration in retail deployments.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC17LC43-08/PT — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC17C43-16I/PT | PIC17C43T-16/PT | PIC17C43-25E/PT | PIC17C43T-25I/PQ | PIC17C44-16I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (PT) | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | MQFP-44 (PQ) - same pinout | TQFP-44 (PT) - same |
| 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 | 2.5 V to 5.5 V | 2.5 V to 6.0 V | 2.5 V to 6.0 V | 2.5 V to 6.0 V | 2.5 V to 6.0 V | 2.5 V to 6.0 V |
| Max Clock Frequency | 8 MHz | 16 MHz | 16 MHz | 25 MHz | 25 MHz | 16 MHz |
| Temperature Grade | Commercial (0C to +70C) | Industrial (-40C to +85C) | Commercial (0C to +70C) | Extended (-40C to +125C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
أبرز الفروقات
- Wide low-voltage supply range 2.5 V to 5.5 V (مقابلPIC17C43-16I/PT)
- Compact TQFP-44 surface-mount footprint (مقابلPIC17C43-16I/P (DIP-40))
- Commercial temperature grade optimized for low cost (مقابلPIC17C43-25E/PT)
ملاحظات التصميم
The PIC17LC43-08/PT operates from 2.5 V to 5.5 V single supply. Place a 100 nF decoupling capacitor as close as possible to each VDD pin (pins 11 and 44), and a bulk 10 uF tantalum or ceramic on the main supply rail. For analog sections driving AVDD (pin 40), add a separate 100 nF plus 10 uF LC pi-filter to reduce digital switching noise coupling into ADC references. Avoid routing high-current switching traces near the oscillator pins to prevent clock jitter.
The TQFP-44 (PT) package uses 0.8 mm pitch gull-wing leads on a 10x10 mm body. Route all signals on inner layers with micro-vias under the pads to break out the dense perimeter pin field; keep lead-to-pad fillets clear of vias to prevent solder wicking. Expose a continuous ground plane on layer 2 beneath the package to provide thermal spreading and a low-impedance return for the 33 I/O pins. The exposed pad (if any) should be soldered to a copper pour for thermal dissipation.
OTP memory on the PIC17LC43-08/PT cannot be erased or re-programmed; verify firmware with a windowed PIC17C43/JW or flash-based PIC18F4220 development part before committing to OTP production runs. The MCLR pin (pin 9) requires a 10 kohm pull-up to VDD for normal operation; floating MCLR causes intermittent resets. The RB6/RB7 pins (pins 18-19) used for ICSP programming must not be pulled low during reset or the part will enter programming mode unexpectedly.
Oscillator stability is critical for the 121 ns instruction cycle timing. Use a fundamental-mode crystal or ceramic resonator with the datasheet-recommended load capacitors (typically 22-33 pF) on OSC1/OSC2 (pins 7-8). For EMI-sensitive applications, place a 4-ohm series resistor between the crystal and OSC1 to dampen over-shoot. Avoid running long traces from the oscillator to the MCU; keep the crystal within 5 mm of the package and surround it with a guard ring tied to ground.
معلومات الامتثال
RoHS-compliant TQFP-44 package per Microchip product page. Not AEC-Q100 qualified - legacy automotive designs should migrate to PIC18F or dsPIC33 AEC-Q100 alternatives. Obsolete life-cycle: PCN has recommended PIC18F4220 as the modern replacement.