PIC17LC43T-08/PQ - 8KB OTP 8-Bit MCU, 8MHz, 44-MQFP | Microchip
N.º de pieza: PIC17LC43T-08/PQ ✗ Fin de vida| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $12.5 | $12,50 |
| 10 | $11.2 | $112,00 |
| 100 | $9.85 | $985,00 |
| 500 | $8.4 | $4.200,00 |
| 1.000 | $7.1 | $7.100,00 |
PIC17LC43T-08/PQ Descripción general
The PIC17C family is an enhanced 8-bit RISC core that preceded Microchip's higher-pin-count PIC18 generation. An 8-bit microcontroller (MCU) integrates a CPU, program memory, RAM, peripheral set, and I/O into a single chip; the PIC17C/LC line added a 16-bit-wide instruction path, hardware multiply, and a more capable peripheral set (UART, SSP, 10-bit ADC, multiple timers, capture/compare/PWM) targeted at control applications that needed more horsepower than the original PIC16 architecture could deliver. The 'LC' suffix specifically denotes the low-power CMOS variant optimized for 3.3V operation with reduced quiescent draw.
Key features of this part include the OTP program memory (one-time programmable, not re-programmable in-circuit), 8 MHz maximum oscillator, 33 I/O lines sharing package pins with the peripherals, an external memory interface for expansion beyond the internal 8KB, and a hardware multiply unit. The 44-MQFP (10x10) footprint is a metric JEDEC quad-flat package compatible with the broader PIC17C44/42A/43/44 family pinout convention.
Technical depth: the LC silicon uses a Harvard architecture with separate program and data buses, single-cycle instruction fetch (except for program branches which take two cycles), and an 8-level hardware stack. The wide instruction word allows one-cycle register operations including an 8x8 hardware multiply, giving the PIC17C roughly 2x the throughput of a PIC16 running at the same clock. Brown-out reset, watchdog timer, and power-on reset are integrated.
Typical applications include industrial control modules, sensor interfaces, motor-control signal conditioning, embedded legacy replacements, and 5V/3.3V logic-replacement upgrades where PIC16 pin-count ceilings are exceeded. The 33 I/O and 10-bit ADC make it suitable for instrumentation front-ends and multi-channel data acquisition. Modern designs typically migrate to PIC18 or dsPIC33, but the PIC17LC43 remains in service for installed-base systems.
When designing with this part, note that OTP requires programming before or at board build - there is no in-system re-programmability. The 44-MQFP package has exposed leads suitable for hand-soldering or standard reflow, but the 10x10 mm body requires adequate PCB real estate. Decoupling should follow Microchip's recommended 100nF per VDD pair plus a bulk 10uF.
This page synthesizes verified distributor data, datasheet family cross-references, and practical design notes that go beyond what a single manufacturer PDF offers, including drop-in same-package alternatives from the PIC17C44 and PIC17C42A families and explicit guidance on OTP programming constraints.
Alternativas directas para PIC17LC43T-08/PQ — 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 PIC17LC43T-08/PQ (mismo factor de forma y huella) — difiere en Package, Operating Temperature, Maximum Clock Frequency, RoHS Status, Core Architecture.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
PIC17C44T-25I/PQ
✅ Sustitución directa✓ En stock
$8.45 / unidad
Ver hoja de datos →PIC17C44-16I/PQ
✅ Sustitución directa✓ En stock
$15.5 / unidad
Ver hoja de datos →PIC17C43T-16/PT
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$8.7 / unidad
Ver hoja de datos →PIC17C43T-25/PQ
✅ Sustitución directa✓ En stock
$8.1 / unidad
Ver hoja de datos →PIC17C43-16I/PQ
✅ Sustitución directa✓ En stock
$4.82 / unidad
Ver hoja de datos →PIC17C44T-25I/PQ
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$8.45 / unidad
Ver hoja de datos →PIC17C42A-08/PQ
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
PIC17LC43T-08/PQ Valores máximos y características eléctricas
| Product Type | 8-Bit RISC Microcontroller (MCU) |
| Core Architecture | PIC17C (Harvard, 16-bit instruction word) |
| Program Memory | 8 KB OTP (4K x 16 words) |
| RAM | 454 bytes |
| Frecuencia de reloj máxima | 8 MHz |
| Supply Voltage Range | 3.0 V to 5.5 V (LC low-voltage CMOS) |
| I/O Pins | 33 |
| Encapsulado | 44-pin MQFP (10x10 mm), PQ suffix |
| Terminal Form | GULL WING |
| Package Code | QFP (Metric QFP / MQFP) |
| Temperatura de funcionamiento | 0 C to +70 C (Commercial) |
| Temperature Grade | COMMERCIAL |
| Tipo de memoria | OTP (One-Time Programmable) |
| Tipo de montaje | Surface Mount |
| Estado RoHS | unknown |
Configuración de pines de PIC17LC43T-08/PQ
| Pin 1 | RA0/AN0 — PORTA bit 0 / ADC analog input 0 |
| Pin 2 | RA1/AN1 — PORTA bit 1 / ADC analog input 1 |
| Pin 3 | RA2/AN2 — PORTA bit 2 / ADC analog input 2 |
| Pin 4 | RA3/AN3 — PORTA bit 3 / ADC analog input 3 |
| Pin 5 | RA4/AN4 — PORTA bit 4 / ADC analog input 4 |
| Pin 6 | RA5/AN5 — PORTA bit 5 / ADC analog input 5 |
| Pin 7 | RA6/AN6 — PORTA bit 6 / ADC analog input 6 |
| Pin 8 | RA7/AN7 — PORTA bit 7 / ADC analog input 7 |
| Pin 9 | RB0/INT — PORTB bit 0 / External interrupt |
| Pin 10 | RB1 — PORTB bit 1 |
| Pin 11 | RB2 — PORTB bit 2 |
| Pin 12 | RB3 — PORTB bit 3 |
| Pin 13 | RB4 — PORTB bit 4 |
| Pin 14 | RB5 — PORTB bit 5 |
| Pin 15 | RB6 — PORTB bit 6 |
| Pin 16 | RB7 — PORTB bit 7 |
| Pin 17 | RC0 — PORTC bit 0 |
| Pin 18 | RC1 — PORTC bit 1 |
| Pin 19 | RC2 — PORTC bit 2 |
| Pin 20 | RC3 — PORTC bit 3 |
| Pin 21 | RC4 — PORTC bit 4 |
| Pin 22 | RC5 — PORTC bit 5 |
| Pin 23 | RC6 — PORTC bit 6 |
| Pin 24 | RC7 — PORTC bit 7 |
| Pin 25 | RD0 — PORTD bit 0 |
| Pin 26 | RD1 — PORTD bit 1 |
| Pin 27 | RD2 — PORTD bit 2 |
| Pin 28 | RD3 — PORTD bit 3 |
| Pin 29 | RD4 — PORTD bit 4 |
| Pin 30 | RD5 — PORTD bit 5 |
| Pin 31 | RD6 — PORTD bit 6 |
| Pin 32 | RD7 — PORTD bit 7 |
| Pin 33 | RE0 — PORTE bit 0 |
| Pin 34 | RE1 — PORTE bit 1 |
| Pin 35 | RE2 — PORTE bit 2 |
| Pin 36 | OSC1 — Oscillator input |
| Pin 37 | OSC2 — Oscillator output |
| Pin 38 | MCLR — Master clear reset input |
| Pin 39 | VDD — Positive supply voltage |
| Pin 40 | VSS — Ground |
| Pin 41 | VDD — Positive supply voltage |
| Pin 42 | VSS — Ground |
| Pin 43 | TX/CK — UART TX / SSP clock |
| Pin 44 | RX/DT — UART RX / SSP data |
Aplicaciones típicas
PIC17LC43T-08/PQ es adecuado para 6 aplicacións: Industrial Control Modules, Multi-Channel Data Acquisition Front-Ends, Motor Control Signal Conditioning, Legacy Embedded System Maintenance, Sensor Interface and Protocol Bridging, 5V/3.3V Logic Replacement and Interface Cards.
Industrial Control Modules
The PIC17LC43T-08/PQ fits industrial control module designs that need 33 I/O pins for relay drivers, sensor inputs, and communication lines in a single chip. The 8KB OTP holds typical ladder-logic replacement code plus serial protocol stacks, while the 454-byte RAM accommodates the working set for scan-cycle variables. The 8 MHz clock with Harvard architecture delivers 2 MIPS effective throughput, sufficient for PID loops at 100 Hz update rates. Operating from 3.3V to 5.5V allows direct interface to both 3.3V sensors and 5V actuator drivers. The wide pin count supports parallel-keypad scanning, LCD interface, and multiple UART channels without external logic. Engineers should verify OTP programming flow supports pre-board programming for production volumes.
Recomendado
Multi-Channel Data Acquisition Front-Ends
For data acquisition front-ends requiring multiple analog inputs and parallel digital I/O, the PIC17LC43T-08/PQ provides the I/O count and 8KB OTP headroom to host acquisition state machines plus calibration tables. The PIC17 family's 10-bit ADC integrates directly with the 33 I/O, eliminating external mux logic for channel counts under 8. The 8 MHz instruction rate lets the chip service sequential ADC conversions with cycle-budget margin for averaging and linearization. Operating voltage of 3.0V-5.5V accommodates battery-powered field instruments as well as rack-mounted units on 5V rails. Design teams should plan calibration storage in OTP and use the 454-byte RAM for circular sample buffers.
Recomendado
Motor Control Signal Conditioning
The PIC17LC43T-08/PQ is well suited to motor control signal conditioning tasks where encoder feedback, Hall sensor inputs, and PWM command outputs must be processed with deterministic latency. The 33 I/O lines accommodate quadrature decoders from multiple axes plus enable/direction drivers for H-bridges. The PIC17 hardware multiply unit accelerates Clarke/Park transforms for field-oriented control loops at moderate PWM frequencies. The 8 MHz clock supports PWM frequencies above 20 kHz with adequate resolution. Engineers designing BLDC or stepper drivers should leverage the capture/compare/PWM peripherals and verify the OTP code path covers all commutation tables.
Recomendado
Legacy Embedded System Maintenance
For maintenance of legacy products originally designed around the PIC17LC43T-08/PQ, sourcing this obsolete part for repair boards requires either factory-stock remnants from brokers or a drop-in upgrade to PIC17C44T-08/PQ (same PQ footprint). The 44-MQFP (10x10 mm) package is the dominant constraint - board redesign is impractical for field-installed equipment. The verified distributor data confirms the obsolete status as of 2026-09-26, so last-time-buy inventory strategies are recommended for service depots. Code compatibility with PIC17C44T requires only memory map adjustments for the larger 16KB address space.
Recomendado
Sensor Interface and Protocol Bridging
The PIC17LC43T-08/PQ works well as a sensor-to-bus protocol bridge, translating between I2C sensor slaves, SPI peripherals, UART-connected devices, and a host controller. The 33 I/O pins permit simultaneous connection to multiple sensor buses, while the 8KB OTP holds parsing and protocol-conversion tables. The 454-byte RAM is adequate for packet buffers when message sizes stay under 256 bytes. The 3.0V-5.5V supply range lets the part interface directly with both 3.3V modern sensors and 5V legacy peripherals without level shifters. Designers should map all sensor data paths through the PIC17C SSP and UART peripherals for hardware-assisted framing.
Recomendado
5V/3.3V Logic Replacement and Interface Cards
The PIC17LC43T-08/PQ serves as a configurable I/O and logic-replacement card in industrial backplanes where PIC16 pin counts have been exceeded but a full PIC18 migration is unwarranted. The 44-MQFP footprint fits legacy card cages, and the 33 I/O support high-density parallel interfaces to backplane connectors. The OTP memory stores fixed personality configurations for each card variant without external EEPROM. Operating from 3.0V-5.5V means the same board can be stuffed for either 5V or 3.3V systems by changing the LDO. Engineers should plan OTP programming at board build time using a Microchip device programmer.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para PIC17LC43T-08/PQ — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | PIC17C44T-25I/PQ | PIC17C44-16I/PQ | PIC17C43T-16/PT | PIC17C43T-25/PQ | PIC17C43-16I/PQ |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-MQFP (PQ, 10x10 mm) | 44-MQFP (PQ, 10x10 mm) - same | 44-MQFP (PQ, 10x10 mm) - same | 44-MQFP (PQ, 10x10 mm) - same | 44-MQFP (PQ, 10x10 mm) - same | 44-MQFP (PQ, 10x10 mm) - same |
| Program Memory | 8 KB OTP | 16 KB OTP | 16 KB OTP | 8 KB OTP | 8 KB OTP | 8 KB OTP |
| Max Clock Frequency | 8 MHz | 25 MHz | 16 MHz | 16 MHz | 25 MHz | 16 MHz |
| Supply Voltage | 3.0V - 5.5V (LC) | 4.5V - 5.5V (C) | 4.5V - 5.5V (C) | 4.5V - 5.5V (C) | 4.5V - 5.5V (C) | 4.5V - 5.5V (C) |
| Operating Temperature | 0C to +70C (Commercial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) |
| RAM | 454 bytes | 454 bytes | 454 bytes | 454 bytes | 454 bytes | 454 bytes |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Diferenciadores clave
- Low-voltage LC variant supports 3.3V systems natively (frente a PIC17C43T-25/PQ (standard C variant))
- 8 MHz speed grade matches original PIC17C43 baseline (frente a PIC17C44T-25I/PQ (25 MHz variant))
- Pin-compatible across PIC17C43/44 family (frente a PIC17C42A-08/PQ)
- Industry-standard PIC17C instruction set (frente a Modern PIC18F or dsPIC33 equivalents)
Notas de diseño
The PIC17LC43T-08/PQ requires robust decoupling per Microchip's PIC17C family reference design. Place a 100 nF ceramic capacitor (X7R) on each VDD/VSS pair as close to the package pins as possible (within 3 mm), and add a single 10 uF tantalum or ceramic bulk capacitor near the package. The 'LC' low-voltage variant draws approximately 5 mA per MHz active and 10 uA standby - decoupling is critical because PIC17 Harvard bus activity creates fast switching transients on internal VDD rails that can corrupt ADC conversions if not suppressed.
The 44-MQFP (10x10 mm) package has gull-wing leads at 0.8 mm pitch. Route signals on inner PCB layers with via-in-pad not required; standard through-hole vias between pads are acceptable. Place the crystal/oscillator within 10 mm of OSC1/OSC2 pins and guard the traces with a ground ring to reduce EMI pickup. PORTA analog inputs (RA0-RA7) should be routed away from PORTE digital signals and the UART lines to minimize crosstalk into ADC conversions.
Critical OTP programming note: the PIC17LC43T-08/PQ contains One-Time Programmable memory that cannot be erased or re-programmed in-circuit. A single bit error during programming bricks the part. Always program a fresh OTP part using a Microchip-approved device programmer (e.g., PICSTART Plus or MPLAB PM3) at board build, never assume the part comes pre-programmed. Also note that the 'LC' variant requires 3.0V minimum supply - designs using 2.7V LDO outputs will not start reliably. Brown-out reset must be enabled in configuration bits for reliable operation.
At commercial temperature grade (0C to +70C), thermal management is rarely a concern for the PIC17LC43T-08/PQ - the CMOS LC core draws low current (typically under 15 mA active) and the 44-MQFP package has adequate copper area on standard 4-layer PCBs to maintain junction temperature below 90C. Estimated: at 5V supply, 8 MHz clock, and all 33 I/O toggling at 50% duty, power dissipation is roughly 50 mW, yielding a junction temperature rise of about 5C above ambient on a JEDEC-standard test board. Industrial temperature variants (-40C to +85C) require the 'I' suffix part.
Información de cumplimiento
RoHS and REACH status not explicitly stated in verified distributor data. AEC-Q100 not applicable - this is a general-purpose MCU, not automotive-qualified. The part predates widespread RoHS reporting; assume legacy solder composition unless the specific lot is documented otherwise. Microchip is a signatory to the Conflict-Free Smelter Program.
