PIC17C43-33I/P - 8-bit OTP MCU, 33MHz, 40-DIP | Microchip
N.º de pieza: PIC17C43-33I/P ✗ Fin de vida| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $13.14 | $13,14 |
| 10 | $12.42 | $124,20 |
| 100 | $11.65 | $1.165,00 |
| 500 | $10.88 | $5.440,00 |
| 1.000 | $10.2 | $10.200,00 |
PIC17C43-33I/P Descripción general
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, I/O peripherals, and timers onto one silicon die; a RISC MCU executes most instructions in a single clock cycle, simplifying pipelining and improving throughput per MHz. The PIC17C4x family sits above the PIC16 mid-range line in Microchip's original 8-bit hierarchy (PIC17C4x -> PIC16 -> PIC12 -> baseline PIC), targeting applications that need more performance, more RAM, and more I/O than a PIC16 can deliver while still using a familiar PIC instruction set. The 'C' in PIC17C43 indicates an OTP (one-time-programmable) CMOS process, suitable for prototyping and low-to-mid volume production where firmware is stable.
Key electrical features include a 33 MHz maximum clock (8.25 MIPS sustained throughput), supply voltage of 4.5 V to 6.0 V (typical 5 V), 33 I/O pins, an 8-bit data bus external to the core, hardware USART, 16-bit capture/compare/PWM, and a programmable 8-bit prescaler watchdog timer. The industrial temperature grade guarantees operation from -40C to +85C. The PIC17C4x instruction set includes hardware 8x8 multiply, which is uncommon in mid-range 8-bit MCUs and accelerates DSP-like inner loops.
Typical applications include industrial control panels, motor control front-ends, point-of-sale terminals, instrumentation, and legacy embedded system maintenance where 5 V rail, through-hole packaging, and a 16-bit-wide external memory bus are still valued. Because the part is OTP, it is most often used where the firmware is finalized and order volumes justify mask-programmed economics.
When designing with PIC17C43-33I/P, ensure the Vdd decoupling network keeps ripple below 50 mV, place the 40-pin DIP socket allowing UV-erase window devices as development substitutes, and verify that any code migration to the recommended PIC18F4220 (Microchip's official modern replacement) preserves register-level behavior expected by legacy firmware libraries. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Alternativas directas para PIC17C43-33I/P — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con PIC17C43-33I/P (mismo factor de forma y huella) — difiere en Mounting Type, Program Memory Size, Program Memory Type, Architecture, Operating Temperature.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
PIC17C42A-33I/P
✅ Sustitución directa✓ En stock
$6.2 / unidad
Ver hoja de datos →PIC17C43-25E/PT
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$10.85 / unidad
Ver hoja de datos →PIC17C43-33I/P Valores máximos y características eléctricas
| Architecture | PIC17C4x, 8-bit RISC CMOS |
| Program Memory Type | OTP (One-Time-Programmable) |
| Program Memory Size | 8 KB |
| Data RAM | 454 bytes |
| Frecuencia de reloj máxima | 33 MHz |
| Instruction Execution Time | 121 ns (one instruction per Tcy) |
| Sustained Throughput | 8.25 MIPS |
| Instruction Set | 58 single-word instructions, hardware 8x8 multiply |
| Supply Voltage (Vdd) | 4.5 V to 6.0 V (typ. 5 V) |
| I/O Pins | 33 |
| External Memory Bus | 16-bit data, 8-bit (256 KB addressable) |
| Timers | Timer0 (16-bit), Timer1 (8-bit), Timer2 (8-bit) |
| PWM / CCP Modules | Yes, 16-bit capture/compare/PWM |
| USART | Yes, hardware USART |
| Watchdog Timer | Programmable 8-bit prescaler WDT |
| Temperatura de funcionamiento | -40 C to +85 C (industrial, 'I' suffix) |
| Encapsulado | 40-pin PDIP, 0.600 inch (15.24 mm) row spacing |
| Tipo de montaje | Through-Hole (THT) |
| Recuento de pines | 40 |
Configuración de pines de PIC17C43-33I/P
| Pin 1 | /MCLR/Vpp — Master Clear (reset, active-low) / OTP programming voltage input |
| Pin 2 | RA0 — PORTA bit 0, digital I/O |
| Pin 3 | RA1 — PORTA bit 1, digital I/O |
| Pin 4 | RA2 — PORTA bit 2, digital I/O |
| Pin 5 | RA3 — PORTA bit 3, digital I/O |
| Pin 6 | RA4 — PORTA bit 4, digital I/O / T0CKI |
| Pin 7 | RA5 — PORTA bit 5, digital I/O |
| Pin 8 | RA6 — PORTA bit 6, digital I/O |
| Pin 9 | RA7 — PORTA bit 7, digital I/O |
| Pin 10 | Vss — Ground reference |
| Pin 11 | RB0 — PORTB bit 0, digital I/O / external interrupt 0 |
| Pin 12 | RB1 — PORTB bit 1, digital I/O / external interrupt 1 |
| Pin 13 | RB2 — PORTB bit 2, digital I/O / external interrupt 2 |
| Pin 14 | RB3 — PORTB bit 3, digital I/O / external interrupt 3 |
| Pin 15 | RB4 — PORTB bit 4, digital I/O |
| Pin 16 | RB5 — PORTB bit 5, digital I/O / CCP1 |
| Pin 17 | RB6 — PORTB bit 6, digital I/O / CCP2 |
| Pin 18 | RB7 — PORTB bit 7, digital I/O / USART RX |
| Pin 19 | RC0 — PORTC bit 0, digital I/O / external memory bus low byte |
| Pin 20 | RC1 — PORTC bit 1, digital I/O / external memory bus low byte |
| Pin 21 | RC2 — PORTC bit 2, digital I/O / external memory bus low byte |
| Pin 22 | RC3 — PORTC bit 3, digital I/O / external memory bus low byte |
| Pin 23 | RC4 — PORTC bit 4, digital I/O / external memory bus low byte |
| Pin 24 | RC5 — PORTC bit 5, digital I/O / external memory bus low byte |
| Pin 25 | RC6 — PORTC bit 6, digital I/O / external memory bus low byte |
| Pin 26 | RC7 — PORTC bit 7, digital I/O / external memory bus low byte |
| Pin 27 | Vdd — Positive supply voltage (4.5 V to 6.0 V) |
| Pin 28 | RD0 — PORTD bit 0, digital I/O / external memory bus high byte |
| Pin 29 | RD1 — PORTD bit 1, digital I/O / external memory bus high byte |
| Pin 30 | RD2 — PORTD bit 2, digital I/O / external memory bus high byte |
| Pin 31 | RD3 — PORTD bit 3, digital I/O / external memory bus high byte |
| Pin 32 | RD4 — PORTD bit 4, digital I/O / external memory bus high byte |
| Pin 33 | RD5 — PORTD bit 5, digital I/O / external memory bus high byte |
| Pin 34 | RD6 — PORTD bit 6, digital I/O / external memory bus high byte |
| Pin 35 | RD7 — PORTD bit 7, digital I/O / external memory bus high byte |
| Pin 36 | RE0 — PORTE bit 0, digital I/O / control signal |
| Pin 37 | RE1 — PORTE bit 1, digital I/O / control signal |
| Pin 38 | RE2 — PORTE bit 2, digital I/O / control signal |
| Pin 39 | OSC1 — Crystal oscillator input (or external clock input) |
| Pin 40 | OSC2 — Crystal oscillator output |
Aplicaciones típicas
PIC17C43-33I/P es adecuado para 6 aplicacións: Industrial Control Panels, Point-of-Sale (POS) Terminals, Motor Control Front-Ends, Legacy Instrumentation and Test Equipment, Building Automation HVAC Controllers, Automotive Accessory Controllers (legacy).
Industrial Control Panels
The PIC17C43-33I/P's 33 MHz clock and 8 KB OTP make it a strong fit for industrial control-panel MCUs that drive relays, scan key matrices, and run PID loops. Its industrial temperature grade (-40 C to +85 C) supports factory floor use, while the 16-bit capture/compare/PWM and hardware 8x8 multiply handle closed-loop motor control inner loops at full instruction speed. At 5 V supply, the part interfaces directly with legacy 5 V logic and 24 V industrial drivers via opto-isolators. Pair this MCU with the ULN2003A driver array for high-voltage load switching in machine tool HMIs.
Recomendado
Point-of-Sale (POS) Terminals
Legacy POS terminals used the PIC17C43-33I/P because of its 33 MHz throughput, hardware USART for magnetic-stripe reader and printer interfacing, and 8 KB OTP for fixed firmware. The 33 I/O pins accommodate key matrices, 7-segment displays, and cash-drawer pulse outputs without external glue logic. Industrial temperature grade handles the thermal variation in retail back-office environments. For battery-backed cash registers, the MCU's power-on reset and brown-out detect provide reliable startup after brown-outs. Pair this MCU with the ADM3202 RS-232 line driver for legacy printer serial interfacing.
Recomendado
Motor Control Front-Ends
The PIC17C43-33I/P's hardware 8x8 multiply, 16-bit CCP/PWM, and 33 MHz instruction rate make it suitable for sensorless BLDC or stepper motor control front-ends in industrial equipment. The 5 V rail and DIP-40 package support legacy through-hole motor-driver boards where thermal conductivity and serviceability matter more than footprint density. Up to 33 I/O pins handle Hall-sensor inputs, phase-driver enables, and quadrature encoder channels. Pair this MCU with the IRF540N power MOSFETs for low-side switching in brushed-DC motor speed controllers and the LMD18245 H-bridge driver for stepper control.
Recomendado
Legacy Instrumentation and Test Equipment
Bench-top multimeters, oscilloscope front-ends, and process calibrators historically used the PIC17C43-33I/P as a measurement engine due to its 33 MHz throughput and 16-bit external memory bus for large lookup tables. Industrial temperature grade handles laboratory environments with fluctuating ambient conditions. The hardware USART streams measured data to a host PC, while the 33 I/O drive LCD segments, rotary encoders, and push-button keypads. Pair this MCU with the MCP4725 DAC for analog output in process calibrators and the ADS1115 16-bit ADC for precision voltage measurement in bench instruments.
Recomendado
Building Automation HVAC Controllers
Building HVAC controllers leverage the PIC17C43-33I/P's industrial temperature grade, 33 MHz headroom for multi-zone temperature sampling, and OTP code protection for firmware confidentiality. The 16-bit CCP module drives triac phase-angle firing for AC motor damper control, while the hardware USART links to BACnet or Modbus supervisory networks. 8 KB of OTP is sufficient for typical schedule/PI loops. Pair this MCU with the MOC3021 optoisolator-triac driver for 24 VAC damper actuation in commercial HVAC systems and the DS18B20 1-Wire digital temperature sensor for zone sensing.
Recomendado
Automotive Accessory Controllers (legacy)
Pre-AEC-Q100-era automotive accessories such as aftermarket alarm modules, remote-entry receivers, and interior lighting controllers used the PIC17C43-33I/P for its industrial temperature grade and 5 V supply tolerance. The 33 MIPS allows fast crypto loops for rolling-code remotes, and 8 KB OTP secures the encoder algorithm. Note that PIC17C43-33I/P is NOT AEC-Q100 qualified for OEM automotive; it is only suitable for aftermarket modules where the customer accepts the industrial-grade temperature spec. Pair this MCU with the TJA1050 CAN transceiver for legacy body-network accessories and the LM317T regulator for 12 V to 5 V supply.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para PIC17C43-33I/P — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | PIC17C43-33I/L | PIC17C42A-33I/P | PIC17C43-25E/P |
|---|---|---|---|---|
| Package | 40-PDIP (0.600 inch) | 44-PLCC (NOT pin-compatible) | 40-PDIP (same) | 40-PDIP (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum Clock Frequency | 33 MHz | 33 MHz | 33 MHz | 25 MHz (-24%) |
| Program Memory | 8 KB OTP | 8 KB OTP | 4 KB OTP (-50%) | 8 KB OTP |
| Data RAM | 454 bytes | 454 bytes | 454 bytes | 454 bytes |
| I/O Pins | 33 | 33 | 33 | 33 |
| Operating Temperature | -40 C to +85 C (industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C (extended) |
| Supply Voltage | 4.5 V to 6.0 V | 4.5 V to 6.0 V | 4.5 V to 6.0 V | 4.5 V to 6.0 V |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete |
Diferenciadores clave
- 8 KB OTP with hardware 8x8 multiply (frente a PIC17C42A-33I/P)
- 33 MHz speed grade is highest in PIC17C4x family (frente a PIC17C43-25E/P)
- Industrial temperature grade vs extended grade (frente a PIC17C43-25E/P (extended grade))
Notas de diseño
Place a 100 nF ceramic decoupling capacitor directly between Vdd (pin 27) and Vss (pin 10) within 5 mm of the package, and add a bulk 10 uF tantalum or aluminum electrolytic near the supply pin. At 33 MHz the PIC17C4x core switching transients can inject 50-100 mA spikes into the 5 V rail; inadequate decoupling causes brown-out resets and unreliable OTP programming. Estimated: total in-rush at power-on with all 33 I/O switching simultaneously is approximately 60 mA sustained plus 100 mA peaks.
For OTP programming, route the /MCLR/Vpp pin (pin 1) to a programming header with a 10 kohm pull-up to Vdd and a separate HV programming voltage path (typically 13 V). Connect OSC1 (pin 39) and OSC2 (pin 40) directly to the crystal or resonator with traces under 10 mm and guard them with a ground ring. Keep the external memory bus traces (RC0-RC7, RD0-RD7) matched in length within 5 mm to minimize skew when accessing external program memory; this is especially important at 33 MHz (one instruction cycle every 121 ns).
Do not assume PIC17C43-33I/P firmware is portable to PIC18F4220 without code review. The PIC17C4x uses a unique register file organization, different bank-switching scheme, and a hardware multiply instruction (MULWF) that PIC16/PIC18 compilers may not generate. EEPROM emulation on PIC17C43 must be done in software because the device has no internal EEPROM; PIC18F4220 has true internal EEPROM and the migration path requires the user to choose between porting the emulation code or rewriting to use hardware EEPROM APIs. For new designs, abandon PIC17C4x entirely and start on PIC18F or dsPIC33.
Estimated: PIC17C43-33I/P dissipates approximately 250 mW at 33 MHz with all 33 I/O switching and 5 V supply; in a 40-pin PDIP without a heat spreader, the junction-to-ambient thermal resistance is approximately 50 C/W. At 85 C ambient, junction reaches 97.5 C, well within the industrial limit but with only modest margin. For enclosed industrial cabinets without forced airflow, derate clock frequency to 25 MHz or migrate to a smaller-footprint PIC18F that dissipates less power.
Información de cumplimiento
Obsolete Microchip part released in the 1990s; RoHS/REACH compliance records may not be available. Not AEC-Q100 qualified. For new automotive designs, choose a PIC18F or dsPIC30/33 variant with AEC-Q100 Grade 0 or Grade 1 qualification.
