PIC17C43T-33I/L - 33MHz 8-bit OTP MCU, 8KB, 44-PLCC | Microchip
MPN: PIC17C43T-33I/L ✗ Cuối đờiPIC17C43T-33I/L Tóm tắt
A microcontroller (MCU) is a single-chip computer that contains a processor core, program memory, RAM, and programmable I/O peripherals. The PIC17C43 belongs to the OTP (One-Time-Programmable) ROM-based MCU family within Microchip's PIC microcontroller taxonomy: PIC17C -> 8-bit PIC -> PIC microcontroller -> microcontroller -> semiconductor -> integrated circuit. This hierarchy places it above simple 8-bit cores but below flash-memory families in upgrade flexibility.
Key features include only 58 single-word instructions to learn, two-cycle program branches and table reads/writes, hardware multiplier, 16-bit data bus, multiple timer/counter modules, and an industry-standard PIC16C5X/PIC16CXX upward-compatible instruction set. The 'T' suffix denotes tape-and-reel packaging, and 'I' denotes the industrial temperature grade of -40 C to +85 C. The 33 MHz speed code indicates a 121 ns instruction cycle.
Architecturally, the PIC17C43 employs a RISC-based Harvard architecture with separate program and data buses, enabling simultaneous instruction fetch and data access. This dual-bus design is what allows the 121 ns single-cycle execution throughput. The OTP memory is programmed once via Microchip's standard device programmer and cannot be erased, making the part suitable for production-cost-sensitive, low-volume, or fixed-code designs.
Typical applications include industrial automation controllers, consumer electronics appliances, automotive subsystems, white-goods motor control, and embedded control where fixed firmware is acceptable. Because OTP memory cannot be field-updated, design teams typically prototype with a windowed (JW) variant and move to OTP for production.
When designing with this device, remember that OTP parts cannot be re-programmed in-circuit. Engineers targeting the same PLCC-44 footprint but requiring flash memory should evaluate Microchip's suggested replacement, the PIC18F4220, which offers in-system programmability. The 33 MHz rating requires careful PCB layout for the clock trace and decoupling at each supply pin.
Bộ thay thế dễ dàng lắp đặt cho PIC17C43T-33I/L — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC17C43T-33I/L (cùng hình factor và footprint) — khác nhau ở Package, Operating Temperature, Program Memory Size, Core Architecture, Mounting Type.
PIC17C43T-25I/L
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC17C43T-33/L
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC17C43T-16/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C43-16/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C43-33I/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C43-16I/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C42AT-33E/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C43T-33I/L Tỷ lệ tối đa & tính chất điện
| Architecture | 8-bit PIC RISC (Harvard) |
| Instruction Set | 58 single-word instructions |
| Clock Input Frequency | 33 MHz |
| Instruction Cycle Time | 121 ns |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 8 KB (4K x 16) |
| Bề rộng đường dữ liệu | 16-bit |
| I/O Pins | 33 |
| Điện áp cung cấp | 4.5 V to 6 V |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial) |
| Hộp | 44-pin PLCC (J-Lead) |
| Package Code | QCCJ |
| Kiểu lắp đặt | Surface Mount |
| Packaging Format | Tape & Reel (T suffix) |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC17C43T-33I/L
| Chân 1 | MCLR/VPP — Master Clear (Reset) / Programming voltage input |
| Chân 2 | OSC1 — Oscillator input / external clock input |
| Chân 3 | OSC2 — Oscillator output (crystal/ceramic mode) |
| Chân 4 | VDD — Positive supply voltage (4.5 V to 6 V) |
| Chân 5 | VSS — Ground reference |
| Chân 6 | RA0/INT0 — PORTA bit 0 / External interrupt 0 |
| Chân 7 | RA1/INT1 — PORTA bit 1 / External interrupt 1 |
| Chân 8 | RA2/INT2 — PORTA bit 2 / External interrupt 2 |
| Chân 9 | RA3 — PORTA bit 3 |
| Chân 10 | RA4 — PORTA bit 4 |
| Chân 11 | RA5 — PORTA bit 5 |
| Chân 12 | VSS — Ground reference |
| Chân 13 | RB0/INT3 — PORTB bit 0 / External interrupt 3 |
| Chân 14 | RB1 — PORTB bit 1 |
| Chân 15 | RB2 — PORTB bit 2 |
| Chân 16 | RB3 — PORTB bit 3 |
| Chân 17 | RB4 — PORTB bit 4 |
| Chân 18 | RB5 — PORTB bit 5 |
| Chân 19 | RB6 — PORTB bit 6 |
| Chân 20 | RB7 — PORTB bit 7 |
| Chân 21 | VSS — Ground reference |
| Chân 22 | RC0/T0CKI — PORTC bit 0 / Timer0 clock input |
| Chân 23 | RC1/CCP1 — PORTC bit 1 / Capture-Compare-PWM 1 |
| Chân 24 | RC2/CCP2 — PORTC bit 2 / Capture-Compare-PWM 2 |
| Chân 25 | RC3 — PORTC bit 3 |
| Chân 26 | RC4 — PORTC bit 4 |
| Chân 27 | RC5 — PORTC bit 5 |
| Chân 28 | RC6/TX — PORTC bit 6 / USART transmit |
| Chân 29 | RC7/RX — PORTC bit 7 / USART receive |
| Chân 30 | VSS — Ground reference |
| Chân 31 | RD0 — PORTD bit 0 |
| Chân 32 | RD1 — PORTD bit 1 |
| Chân 33 | RD2 — PORTD bit 2 |
| Chân 34 | RD3 — PORTD bit 3 |
| Chân 35 | RD4 — PORTD bit 4 |
| Chân 36 | RD5 — PORTD bit 5 |
| Chân 37 | RD6 — PORTD bit 6 |
| Chân 38 | RD7 — PORTD bit 7 |
| Chân 39 | VSS — Ground reference |
| Chân 40 | RE0 — PORTE bit 0 |
| Chân 41 | RE1 — PORTE bit 1 |
| Chân 42 | RE2 — PORTE bit 2 |
| Chân 43 | VDD — Positive supply voltage (4.5 V to 6 V) |
| Chân 44 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
PIC17C43T-33I/L phù hợp cho 6 Áp dụngs: Industrial Automation Controllers, Consumer Electronics Appliances, Automotive Subsystems (Pre-Grade), White-Goods Motor Control, Embedded Control Fixed-Firmware Modules, Test Equipment and Instrumentation.
Industrial Automation Controllers
The PIC17C43T-33I/L is well suited to industrial automation controllers where fixed, deterministic firmware is acceptable. With 8.25 MIPS throughput and 121 ns instruction cycle, the device can sample sensor inputs at high rates while executing PID control loops in real time. Its 33 general-purpose I/O pins interface directly to relays, optocouplers, and encoder inputs typical of PLC-style controllers. The industrial -40 C to +85 C temperature range tolerates factory floor environments. The 4.5 V to 6 V supply aligns with 5 V industrial backplanes.
Được đề xuất
Consumer Electronics Appliances
The PIC17C43T-33I/L fits consumer appliances such as washing machines, microwave ovens, and HVAC thermostats where the production volume justifies OTP programming cost. The 8 KB OTP memory holds appliance control algorithms; 33 I/O pins drive keypads, displays, motor relays, and sensor conditioning. The Harvard RISC architecture and 58-instruction set ease firmware development and reduce time-to-market. Surface-mount 44-PLCC packaging supports automated assembly lines in high-volume appliance manufacturing.
Được đề xuất
Automotive Subsystems (Pre-Grade)
The PIC17C43T-33I/L is used in non-safety-critical automotive subsystems such as interior lighting controllers, seat-position memories, and HVAC blend-door actuators. Its 33 MHz clock and 8.25 MIPS support CAN or LIN protocol stacks via software bit-banging or external transceivers. The -40 C to +85 C industrial temperature range covers cabin environments. Note: for AEC-Q100 qualified automotive applications, Microchip recommends the PIC18F family with automotive grade designations.
Được đề xuất
White-Goods Motor Control
The PIC17C43T-33I/L can drive small BLDC or stepper motors in white-goods applications such as refrigerator compressors and dishwasher pumps. With 33 MHz instruction throughput, the MCU generates PWM signals at typical 20-25 kHz switching frequencies while leaving CPU bandwidth for closed-loop control. The 33 I/O pins interface to Hall sensors, current shunts, and gate-driver enable signals. The OTP memory holds fixed motor-control firmware while production cost is minimized versus flash-based MCUs.
Được đề xuất
Embedded Control Fixed-Firmware Modules
The PIC17C43T-33I/L suits embedded control modules shipping with locked firmware such as POS terminals, security alarm panels, and metering devices. OTP memory prevents field firmware tampering. The Harvard architecture and 8 KB code space are sufficient for encryption routines, communication stacks (UART/SPI), and display drivers. The 44-PLCC package provides test and programming access via standard Microchip device programmers, simplifying in-line factory programming.
Được đề xuất
Test Equipment and Instrumentation
The PIC17C43T-33I/L is used in test fixtures and bench instrumentation where fixed measurement algorithms run reliably without field updates. The 33 MHz throughput processes ADC samples and computes RMS, peak, or frequency-domain values in real time. The 33 I/O pins drive relays for stimulus routing, status LEDs, and front-panel keypads. The 5 V nominal supply matches standard laboratory instrumentation rails, and the 44-PLCC allows easy rework during firmware development using the JW windowed variant.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC17C43T-33I/L — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC17C43T-25I/L | PIC17C43T-33/L | PIC17C43T-16/PT | PIC17C43-33I/L |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-PLCC (J-Lead) | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same |
| Maximum Clock Frequency | 33 MHz | 25 MHz (-24%) | 33 MHz (same) | 16 MHz (-52%) | 33 MHz (same) |
| Instruction Cycle | 121 ns | 160 ns | 121 ns (same) | 250 ns | 121 ns (same) |
| Program Memory | 8 KB (4K x 16) OTP | 8 KB OTP (same) | 8 KB OTP (same) | 8 KB OTP (same) | 8 KB OTP (same) |
| I/O Pins | 33 | 33 | 33 | 33 | 33 |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C | 0 C to +70 C (Commercial) | 0 C to +70 C (Commercial) | -40 C to +85 C |
| 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 |
| Packaging Format | Tape & Reel | Tape & Reel | Tape & Reel | Tape & Reel | Tube |
Bảo phân biệt quan trọng
- Higher program memory than PIC17C42A (vsPIC17C42AT-33E/PQ)
- Industrial temperature grade available (vsPIC17C43T-33/L)
- Tape and reel packaging for automated assembly (vsPIC17C43-33I/L)
Ghi chú thiết kế
OTP memory is one-time-programmable - the firmware cannot be erased or rewritten in-circuit. Always prototype with the JW windowed variant (PIC17C43/JW) before committing to OTP parts for production. Verify programming voltage timing (VPP=13V typical) and ensure MCLR is pulled high through a 10k resistor to avoid unintended resets during programming. Estimated: programming pulses are typically 1ms per word.
The PIC17C43 requires decoupling on every VDD/VSS pair (4 VDD pins, 5 VSS pins for the 44-PLCC). Place a 100 nF ceramic capacitor as close as possible to each VDD pin and a single 10 uF bulk capacitor at the supply entry point. The 33 MHz operation can cause ground bounce if decoupling is inadequate, leading to ADC or USART communication errors. Estimated: total recommended decoupling is 4 x 100 nF ceramic + 1 x 10 uF tantalum.
Route the OSC1/OSC2 clock traces symmetrically with matched length to avoid duty-cycle distortion. Keep clock traces short (< 25 mm) and away from high-current switching nodes. For surface-mount designs using a crystal, place the crystal and its load capacitors within 5 mm of the OSC1/OSC2 pins to minimize parasitic capacitance and EMI. A ground guard ring around the crystal improves noise immunity in industrial environments.
Thông tin tuân thủ
RoHS compliant per Microchip product page; not AEC-Q100 qualified (industrial grade only); lead-free packaging confirmed; halogen-free status not explicitly stated in provided data.
