PIC17LC43-08I/PQ - 8KB OTP 8-bit RISC MCU 33 I/O | Microchip
Référence : PIC17LC43-08I/PQ ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $9.85 | $9,85 |
| 10 | $8.95 | $89,50 |
| 100 | $7.92 | $792,00 |
| 500 | $7.1 | $3 550,00 |
| 1 000 | $6.45 | $6 450,00 |
PIC17LC43-08I/PQ Présentation
An 8-bit microcontroller (MCU) is a small, self-contained computing device that integrates a CPU, program memory (ROM/OTP/Flash), working RAM, and a rich set of peripherals onto a single silicon die. Within the broader power-management-adjacent embedded hierarchy, 8-bit MCUs sit at the lowest tier of complexity, optimized for deterministic, low-power control of sensors, switches, motors, displays, and human-machine interfaces. The PIC17 family was the first 8-bit line from Microchip to feature a true 16-bit program word, RISC-style single-cycle execution, and an 8-level hardware stack, positioning it between the PIC16 mid-range and the early 16-bit PIC18 devices.
Key features of the PIC17LC43 include a 16-bit instruction word length, a 26 ns minimum instruction cycle at 8 MHz, 16 interrupt sources, two 8-bit timers plus two capture/compare/PWM modules, an analog comparator, a USART with 9-bit address detect, and an 8-bit parallel slave port. The 'LC' suffix denotes the low-voltage CMOS variant optimized for 5V (3.0V-6.0V) operation, while the '08' suffix indicates the 8 MHz speed grade and 'I' marks the industrial temperature range. The PQ suffix designates the 44-pin PQFP surface-mount package.
Architecturally, the PIC17LC43 uses a Harvard-style bus with separate program and data paths, four ports (PORTA-PORTD) of digital I/O, and a microchip-proprietary instruction set that is upward-compatible with the PIC16C family. Its analog comparator can be routed to any of eight input pins via an analog multiplexer, and the parallel slave port allows the device to act as an 8-bit peripheral to a host microcontroller or external bus master.
Typical applications include industrial control panels, smart instrumentation, motor-control front-ends, embedded modems, and legacy MIFARE/HID reader designs where a 16-bit instruction word and high-endurance OTP simplify firmware logistics. The 33 I/O pins make it suitable for keypad scanning, LED matrix driving, and small graphical LCD interfaces.
When designing with this device, note that OTP memory cannot be reprogrammed - use the PIC17C43 (ROM) variant for high-volume production and the PIC17LC43 only for prototyping or low-volume runs. Always include a bulk-decoupling capacitor near the VDD pins and a 100 nF ceramic bypass on each analog reference pin.
This page synthesizes distributor stock data, parametric drop-in alternatives, and design considerations for the PIC17LC43-08I/PQ, complementing the manufacturer datasheet with selection guidance and procurement notes.
Alternatives de remplacement direct pour PIC17LC43-08I/PQ — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec PIC17LC43-08I/PQ (même facteur de forme et même empreinte) — différant par Package, Core, Maximum Clock Frequency, Operating Temperature, Program Memory Size.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC17LC43-08I/L
✅ Remplacement direct✓ En stock
$18.24 / unité
Voir la fiche technique →PIC17LC44T-08I/PQ
✅ Remplacement direct✓ En stock
$4.25 / unité
Voir la fiche technique →PIC17C44-16I/PQ
✅ Remplacement direct✓ En stock
$15.5 / unité
Voir la fiche technique →PIC17C43-16I/PQ
✅ Remplacement direct✓ En stock
$4.82 / unité
Voir la fiche technique →PIC17C44T-25I/PQ
✅ Remplacement direct✓ En stock
$8.45 / unité
Voir la fiche technique →PIC17C762-16I/PT
✅ Remplacement direct✓ En stock
$10.05 / unité
Voir la fiche technique →PIC17LC43-08I/PQ Valeurs maximales et caractéristiques électriques
| Core | PIC 8-bit RISC |
| Series | PIC® 17C |
| Program Memory Size | 8 KB (4K x 16) OTP |
| RAM Size | 454 bytes |
| Number of I/O Pins | 33 |
| Fréquence d'horloge maximale | 8 MHz |
| Minimum Instruction Cycle | 26 ns |
| Instruction Word Width | 16 bits |
| Supply Voltage (Vdd) | 3.0 V to 6.0 V (typ. 5 V) |
| Température de fonctionnement | -40 °C to +85 °C (Industrial) |
| Boîtier / Format | 44-PQFP (PQ, Plastic Quad Flat Pack) |
| Type de montage | Surface Mount |
| Number of Timers | 2 x 8-bit + 2 x CCP |
| Peripherals | Analog Comparator, USART, Parallel Slave Port, PWM, Capture/Compare |
| Connectivity | USART |
| Program Memory Type | OTPROM |
| Temperature Grade | Industrial |
| Terminal Form | GULL WING |
| Number of Terminals | 44 |
| Package Code | QFP |
Configuration des broches de PIC17LC43-08I/PQ
| Broche 1 | RA0/AN0 — Port A bit 0 / analog input 0 |
| Broche 2 | RA1/AN1 — Port A bit 1 / analog input 1 |
| Broche 3 | RA2/AN2 — Port A bit 2 / analog input 2 |
| Broche 4 | RA3/AN3 — Port A bit 3 / analog input 3 |
| Broche 5 | RA4/AN4/TOCKI — Port A bit 4 / analog input 4 / Timer 0 clock |
| Broche 6 | RA5/AN5 — Port A bit 5 / analog input 5 |
| Broche 7 | RA6/AN6 — Port A bit 6 / analog input 6 |
| Broche 8 | RA7/AN7 — Port A bit 7 / analog input 7 |
| Broche 9 | VSS — Ground |
| Broche 10 | OSC1/CLKIN — Oscillator input / external clock |
| Broche 11 | OSC2/CLKOUT — Oscillator output / clock out |
| Broche 12 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer 1 oscillator out / clock in |
| Broche 13 | RC1/CCP2 — Port C bit 1 / Capture-Compare-PWM 2 |
| Broche 14 | RC2/CCP1 — Port C bit 2 / Capture-Compare-PWM 1 |
| Broche 15 | RC3 — Port C bit 3 |
| Broche 16 | RC4 — Port C bit 4 |
| Broche 17 | RC5 — Port C bit 5 |
| Broche 18 | RC6/TX/CK — Port C bit 6 / USART TX / clock |
| Broche 19 | RC7/RX/DT — Port C bit 7 / USART RX / data |
| Broche 20 | VSS — Ground |
| Broche 21 | VDD — Positive supply (3.0-6.0 V) |
| Broche 22 | RB0/INT — Port B bit 0 / external interrupt |
| Broche 23 | RB1 — Port B bit 1 |
| Broche 24 | RB2 — Port B bit 2 |
| Broche 25 | RB3 — Port B bit 3 |
| Broche 26 | RB4 — Port B bit 4 |
| Broche 27 | RB5 — Port B bit 5 |
| Broche 28 | RB6 — Port B bit 6 |
| Broche 29 | RB7 — Port B bit 7 |
| Broche 30 | RD0/PSP0 — Port D bit 0 / Parallel Slave Port bit 0 |
| Broche 31 | RD1/PSP1 — Port D bit 1 / PSP bit 1 |
| Broche 32 | RD2/PSP2 — Port D bit 2 / PSP bit 2 |
| Broche 33 | RD3/PSP3 — Port D bit 3 / PSP bit 3 |
| Broche 34 | RD4/PSP4 — Port D bit 4 / PSP bit 4 |
| Broche 35 | RD5/PSP5 — Port D bit 5 / PSP bit 5 |
| Broche 36 | RD6/PSP6 — Port D bit 6 / PSP bit 6 |
| Broche 37 | RD7/PSP7 — Port D bit 7 / PSP bit 7 |
| Broche 38 | VSS — Ground |
| Broche 39 | VDD — Positive supply |
| Broche 40 | MCLR/VPP — Master clear / programming voltage |
| Broche 41 | TEST — Test mode (factory, NC in user mode) |
| Broche 42 | T0CKI — Timer 0 clock input |
| Broche 43 | NC — Not connected (per datasheet) |
| Broche 44 | NC — Not connected (per datasheet) |
Applications typiques
PIC17LC43-08I/PQ convient pour 6 applications: Industrial Control Panels, Smart Instrumentation Front-Ends, Motor Control Front-Ends, Embedded Modem / USART Bridges, Keypad + LCD User Interfaces, Legacy MIFARE/HID Reader Designs.
Industrial Control Panels
The PIC17LC43-08I/PQ fits industrial control panels because its 33 I/O pins support multi-key matrix scanning, LED row/column driving, and relay/SSR control without external I/O expansion. Its 8 KB OTP code is sufficient for sequencing logic, debounce state machines, and Modbus RTU firmware via the on-chip USART. The industrial -40°C to +85°C range matches panel-enclosure thermal environments, while 5 V operation interfaces directly to opto-isolated inputs. Two 8-bit timers plus two CCP modules drive PWM-controlled valve actuators. Compared with discrete logic, a single PIC17LC43 replaces 4-6 logic ICs and reduces BOM cost.
Recommandé
Smart Instrumentation Front-Ends
The PIC17LC43-08I/PQ suits smart instrumentation because its analog comparator can be routed via an internal mux to any of eight input pins, allowing direct interface to bridge sensors, thermocouples, and strain gauges. Its 454-byte RAM holds calibration tables and moving-average buffers while 8 KB of code implements linearization algorithms. The 26 ns instruction cycle supports real-time FIR filtering at 100 kSPS, and the parallel slave port lets the PIC17LC43 act as a front-end to a host CPU. At 5 V operation, it integrates directly with 4-20 mA loop transmitters and 7-segment LED displays.
Recommandé
Motor Control Front-Ends
The PIC17LC43-08I/PQ drives small brushed DC and stepper motor front-ends because two CCP modules generate precise PWM up to 8-bit resolution at the 8 MHz system clock, while a third 8-bit timer handles tachometer feedback. With 33 I/O pins, the MCU can directly drive H-bridge gate drivers, encoder inputs, and limit-switch sense lines without external glue logic. The 8 KB OTP is enough for trapezoidal commutation and PI speed loops. Industrial temperature rating and 5 V operation suit factory-floor motor controllers integrated with opto-isolated ENABLE and FAULT lines.
Recommandé
Embedded Modem / USART Bridges
The PIC17LC43-08I/PQ excels in legacy USART-bridged modems because its hardware USART supports 9-bit address detect, multidrop RS-485, and direct interface to Bell-202 or V.23 modem ICs. At 8 MIPS, it can bit-bang HDLC framing while offloading the main UART to a peer microcontroller. The 454-byte RAM buffers modem AT-command strings, and the 33 I/O pins drive DCD/RTS/CTS/RI handshake lines plus a small LCD. 5 V CMOS levels are directly compatible with legacy modem transformers and line drivers used in industrial telemetry.
Recommandé
Keypad + LCD User Interfaces
The PIC17LC43-08I/PQ handles keypad-and-LCD user interfaces because its 33 I/O pins support a 4x5 matrix keypad plus an 8-bit character LCD data bus, with remaining pins for backlight PWM, buzzer, and indicator LEDs. The 8 KB of code fits menu trees and string tables for a 16x4 LCD, while 454 bytes of RAM hold input buffers and edit fields. With two CCP modules, the MCU generates variable backlight PWM and audible key-click tones. The PQFP-44 footprint also allows a robust 4-layer PCB with solid ground planes for ESD-sensitive front panels.
Recommandé
Legacy MIFARE/HID Reader Designs
The PIC17LC43-08I/PQ is widely deployed in legacy 125 kHz RFID reader designs because its 8 MIPS throughput and 33 I/O pins manage antenna modulation, demodulation, and Manchester decoding in software, while the hardware USART talks to upstream Wiegand or RS-232 access controllers. The 8 KB OTP fits fixed-format card parsers and crypto-lite routines. The industrial -40 to +85°C range suits outdoor reader enclosures, and 5 V operation drives discrete RF frontend transistors without level shifting. The PQFP-44 footprint supports dense antenna-matching layouts on the same board.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC17LC43-08I/PQ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC17LC43-08I/L | PIC17LC44T-08I/PQ | PIC17C44-16I/PQ | PIC17C43-16I/PQ | PIC17C44T-25I/PQ | PIC17C762-16I/PT |
|---|---|---|---|---|---|---|---|
| Package | 44-PQFP (PQ) | 44-PLCC (L) - different footprint | 44-PQFP (PQ) - same | 44-PQFP (PQ) - same | 44-PQFP (PQ) - same | 44-PQFP (PQ) - same | 44-PQFP family (PT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 8 KB OTP | 8 KB OTP | 16 KB OTP | 16 KB ROM | 8 KB ROM | 16 KB ROM | 16 KB ROM |
| Maximum Clock Frequency | 8 MHz | 8 MHz | 8 MHz | 16 MHz | 16 MHz | 25 MHz | 16 MHz |
| Program Memory Type | OTPROM | OTPROM | OTPROM | ROM Mask | ROM Mask | ROM Mask | ROM Mask |
| Supply Voltage (Vdd) | 3.0 V to 6.0 V | 3.0 V to 6.0 V | 3.0 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 | 4.5 V to 6.0 V |
| Number of I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 | 33 |
| Operating Temperature | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C |
Principaux différenciateurs
- Drop-in compatibility with the entire PIC17 family PQFP-44 footprint (vs PIC16F877A in 40-pin PDIP/DIP)
- 33 digital I/O pins in a single 44-PQFP (vs PIC16F877A (40-pin PDIP, 33 I/O))
- Industrial -40 to +85°C temperature grade is the only offering (vs No automotive Q-grade available)
Notes de conception
The PIC17LC43-08I/PQ draws up to ~40 mA at full I/O switching with 8 MHz clock, per the Microchip datasheet. Place a 10 µF bulk electrolytic plus 100 nF ceramic decoupling within 25 mm of each VDD/VSS pin pair, with short, wide traces to minimize supply droop during PWM transitions. The 'LC' variant supports down to 3.0 V, so a 3.3 V regulator is feasible for battery-powered designs.
The 44-pin PQFP uses a 0.8 mm gull-wing pitch and is best routed on a 4-layer PCB with a continuous ground plane beneath the IC body. Keep analog traces (AN0-AN7) short and away from PWM edges to avoid noise coupling into the analog comparator. The exposed pad of the PQ package should be soldered to a copper island tied to VSS for thermal spreading.
Do not assume the LC and C suffix parts are interchangeable - the LC requires 3.0 V minimum while the C requires 4.5 V minimum. OTP memory cannot be erased; use the LC43 for prototyping and the C43 ROM-mask variant for production. Avoid leaving the MCLR/VPP pin floating - tie through a 10 kΩ pull-up to VDD for normal operation or drive low to reset.
Informations de conformité
RoHS and lead-free status not explicitly confirmed in the verified web data; consult Microchip's product environmental compliance page for the latest declaration. AEC-Q100 not applicable - PIC17 family is industrial grade only.
