PIC18F45Q43-I/MP - 8-bit 64MHz 32KB Flash XLP MCU | Microchip
Référence : PIC18F45Q43-I/MP ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $2.21 | $2,21 |
| 10 | $2.05 | $20,50 |
| 100 | $1.84 | $184,00 |
| 500 | $1.66 | $830,00 |
| 1 000 | $1.49 | $1 490,00 |
| 3 000 | $1.32 | $3 960,00 |
PIC18F45Q43-I/MP Présentation
An 8-bit microcontroller is a CPU that processes data 8 bits per cycle and is widely used in real-time embedded applications where deterministic latency, low power, and rich on-chip peripherals matter more than raw compute throughput. Within the broader taxonomy, PIC microcontrollers occupy the 8-bit MCU segment, and the PIC18F family represents Microchip's enhanced mid-range core featuring a hardware multiplier, C-compiler-friendly architecture, and linear memory addressing. The Q43 sub-family is positioned for analog-rich, hardware-customizable designs and supersedes earlier Q10/K42 generation devices.
Key features include a 12-bit ADCC supporting Capacitive Voltage Divider (CVD) for touch sensing, configurable logic cells (CLC) for custom digital glue logic, three independent 16-bit PWMs each offering dual outputs on the same time base, and XLP (eXtreme Low Power) technology delivering sub-microamp sleep currents. The device also integrates an 8-bit DAC, multiple UART/SPI/I2C instances, a 32KB self-programmable Flash and a unique Peripheral Pin Select (PPS) routing matrix for flexible signal mapping.
Architecturally, the PIC18F45Q43 uses a modified Harvard bus with a 16-bit instruction word and 8-bit data path, achieving approximately 16 MIPS at 64MHz. The CIP block approach lets analog, timing, and communication tasks run in hardware without CPU intervention, offloading the core in real-time control loops and reducing firmware complexity.
Typical applications include capacitive touch user interfaces, BLDC and DC motor/fan control, LED lighting drivers, IoT sensor nodes, and industrial control subsystems. The wide operating voltage and rich peripheral set make it well suited for 24V industrial bus systems running from simple linear regulators.
When designing with this MCU, always configure PPS before enabling peripherals, keep traces short for the high-speed 16-bit PWM outputs, and stitch adequate ground copper under the QFN thermal pad. Industrial designs must observe the -40C to +85C industrial temperature grade.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes that complement - not duplicate - the manufacturer datasheet, helping engineers select and qualify the PIC18F45Q43-I/MP for production.
Alternatives de remplacement direct pour PIC18F45Q43-I/MP — 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 PIC18F45Q43-I/MP (même facteur de forme et même empreinte) — différant par ADC, DAC, Package.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC18F46Q43-I/MP
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC18F45Q43-E/MP
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC18F45Q43-I/MP Valeurs maximales et caractéristiques électriques
| Core Architecture | PIC18 Enhanced Mid-Range (8-bit data, 16-bit instruction) |
| Family | PIC18F Q43 (XLP) |
| Program Memory (Flash) | 32 KB |
| SRAM | 2 KB |
| EEPROM | 1 KB |
| Maximum CPU Frequency | 64 MHz (16 MIPS) |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Plage de température de fonctionnement | -40 C to +85 C (Industrial) |
| ADC | 12-bit ADC with Computation (ADCC), Capacitive Voltage Divider (CVD) |
| DAC | 8-bit DAC |
| PWM | 3 x 16-bit PWM (six PWM outputs, dual outputs per time base) |
| DMA | 6 channels |
| Comparators | Yes |
| CLC (Configurable Logic Cells) | Yes |
| Peripheral Pin Select (PPS) | Yes |
| ZCD / CWG / WWDT / SCAN-CRC / HLT | Yes |
| Communication | UART, SPI, I2C (multiple instances) |
| Boîtier | 40-pin QFN (5x5 mm, MP code, HVQCCN, exposed pad) |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant |
| XLP Sleep Current | Sub-microamp (per XLP family spec) |
Configuration des broches de PIC18F45Q43-I/MP
| Broche 1 | I/O/RA0 — PORTA bit 0, analog-capable, CCP/PWM remappable |
| Broche 2 | I/O/RA1 — PORTA bit 1, analog-capable |
| Broche 3 | I/O/RA2 — PORTA bit 2, analog-capable |
| Broche 4 | I/O/RA3 — PORTA bit 3, analog-capable |
| Broche 5 | I/O/RA4 — PORTA bit 4 |
| Broche 6 | I/O/RA5 — PORTA bit 5 |
| Broche 7 | I/O/RA6 — PORTA bit 6 |
| Broche 8 | I/O/RA7 — PORTA bit 7 |
| Broche 9 | VSS — Ground |
| Broche 10 | VDD — Positive supply, 1.8V to 5.5V |
| Broche 11 | I/O/RB0 — PORTB bit 0, INT capable |
| Broche 12 | I/O/RB1 — PORTB bit 1 |
| Broche 13 | I/O/RB2 — PORTB bit 2 |
| Broche 14 | I/O/RB3 — PORTB bit 3 |
| Broche 15 | I/O/RB4 — PORTB bit 4 |
| Broche 16 | I/O/RB5 — PORTB bit 5 |
| Broche 17 | I/O/RB6 — PORTB bit 6, ICSCLK |
| Broche 18 | I/O/RB7 — PORTB bit 7, ICSDAT |
| Broche 19 | VSS — Ground |
| Broche 20 | VDD — Positive supply |
| Broche 21 | I/O/RC0 — PORTC bit 0 |
| Broche 22 | I/O/RC1 — PORTC bit 1 |
| Broche 23 | I/O/RC2 — PORTC bit 2 |
| Broche 24 | I/O/RC3 — PORTC bit 3, SCL optional |
| Broche 25 | I/O/RC4 — PORTC bit 4, SDA optional |
| Broche 26 | I/O/RC5 — PORTC bit 5 |
| Broche 27 | I/O/RC6 — PORTC bit 6, TX |
| Broche 28 | I/O/RC7 — PORTC bit 7, RX |
| Broche 29 | I/O/RE3 — PORTE bit 3, digital only |
| Broche 30 | I/O/RD0 — PORTD bit 0 |
| Broche 31 | I/O/RD1 — PORTD bit 1 |
| Broche 32 | I/O/RD2 — PORTD bit 2 |
| Broche 33 | I/O/RD3 — PORTD bit 3 |
| Broche 34 | I/O/RD4 — PORTD bit 4 |
| Broche 35 | I/O/RD5 — PORTD bit 5 |
| Broche 36 | I/O/RD6 — PORTD bit 6 |
| Broche 37 | I/O/RD7 — PORTD bit 7 |
| Broche 38 | VSS — Ground |
| Broche 39 | VDD — Positive supply |
| Broche 40 | EP — Exposed thermal pad (must be soldered to VSS copper pour for heat dissipation) |
Applications typiques
PIC18F45Q43-I/MP convient pour 6 applications: Capacitive Touch User Interface, BLDC Motor / Fan Control, Industrial Sensor / 24V Bus Module, LED Lighting Drivers, Battery-Powered IoT Sensor Node, Functional Safety / Safe-Output Industrial I/O.
Capacitive Touch User Interface
The PIC18F45Q43-I/MP is well matched to capacitive touch user interfaces because the integrated 12-bit ADCC with Computation natively executes CVD techniques for button, slider and proximity sensing. Hardware oversampling, accumulation, and threshold comparison are offloaded from the CPU, leaving the 16 MIPS core free for display refresh, debouncing, and communication tasks. In a typical 8-key touch keyboard the mTouch CVD framework runs on the ADCC with zero firmware DSP, and the three 16-bit PWMs can drive LED backlight brightness simultaneously. Compared to discrete touch ICs, this single-chip solution reduces BOM cost and PCB area while maintaining low power via XLP sleep.
Recommandé
BLDC Motor / Fan Control
The PIC18F45Q43-I/MP's three independent 16-bit PWMs with dual outputs per time base provide all six PWM channels needed for six-step BLDC commutation or sinusoidal field-oriented control. Hardware fault inputs, dead-band generation, and the configurable CLC cells handle the protection and signal glue of an inverter stage without CPU load. The 12-bit ADCC samples motor currents at the PWM center point with deterministic timing, while the six DMA channels move conversion results to memory and the CWG drives complementary outputs with programmable dead time. Compared with 8-bit MCUs that lack 16-bit PWMs, the Q43 reduces firmware complexity for sensorless or Hall-sensored BLDC drivers, fan controllers, and small pump control designs.
Recommandé
Industrial Sensor / 24V Bus Module
Industrial sensor and 24V-bus digital input modules benefit from the PIC18F45Q43-I/MP's 1.8V to 5.5V supply range and rich analog peripherals. The wide supply eliminates the need for two regulators on a 5V/3.3V split rail design, and the 12-bit ADCC with up to 35 channels on this 40-pin QFN derivate is sufficient for multi-channel current/voltage sensing. Hardware CIPs - DMA, CLC, ZCD, CWG - let a single MCU debounce optocoupler inputs, generate zero-crossing timing, and drive RS-485/SPI/I2C peripherals deterministically. Operating at -40C to +85C, this part is qualified for industrial temperature ranges found in factory automation.
Recommandé
LED Lighting Drivers
PIC18F45Q43-I/MP excels in intelligent LED lighting drivers by combining three 16-bit PWMs (six outputs) with hardware DMA and CLC, enabling multi-channel color-mixing and analog dimming without firmware burden. Each PWM time base supports center-aligned modulation with dead-band insertion for backlight or RGBW strings at high dimming ratios up to 16-bit resolution. The XLP sub-microamp sleep current and fast wake-up from the CLC-equipped peripheral matrix mean the MCU can enter standby between brightness updates for total power reduction. Compared with simple 8-bit timers, the Q43 PWMs avoid dimming flicker at low duty cycles thanks to 16-bit timing precision.
Recommandé
Battery-Powered IoT Sensor Node
The PIC18F45Q43-I/MP is an excellent choice for battery-powered IoT sensor nodes thanks to its XLP (eXtreme Low Power) technology offering sub-microamp sleep current and microamp-level active current at low FOSC. The integrated 12-bit ADCC with hardware oversampling lowers the number of active CPU wake-ups needed for accurate sensor reads, and six DMA channels shuffle conversion results without waking the core. The 1.8V to 5.5V range covers single-cell Li-ion, two-cell AA, and 3V coin-cell chemistries, while the -40C to +85C industrial range fits outdoor IoT deployments. Compared with ARM Cortex-M0+ alternatives, this 8-bit PIC parts offer deterministic behavior and simple firmware in compact 40-QFN packages.
Recommandé
Functional Safety / Safe-Output Industrial I/O
The PIC18F45Q43-I/MP, paired with its functional-safety variant designations, is well suited to safety-input/output modules that require fault detection on each channel. Hardware CRC/SCAN over memory, windowed WWDT, hardware fault zoning via CLC, and analog ZCD provide the diagnostic primitives required in IEC 61508 SIL-2-capable designs. The PWMs with fault inputs can be hardware-killed in microseconds without firmware cooperation, and the DDS-driven DMA continually moves I/O states to memory for voter logic. Compared with a discrete watchdog + relay scheme, this single-chip implementation reduces cost while providing deterministic safety response in machinery control cabinets.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC18F45Q43-I/MP — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC18F45Q43-I/PT | PIC18F46Q43-I/MP | PIC18F45Q43-E/MP | PIC18F25Q43-I/STX | PIC18F27Q10-I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash | 32 KB | 32 KB | 64 KB | 32 KB | 32 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 4 KB | 2 KB | 2 KB | 2 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| Max CPU Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Supply Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Temperature Grade | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Extended -40C to +125C | Industrial -40C to +85C | Industrial -40C to +85C |
| Pin Count | 40 | 44 | 40 | 40 | 28 | 28 |
Principaux différenciateurs
- Newest Q43 CIP architecture with ADCC, CLC, 16-bit PWM (vs PIC18F27Q10-I/SS)
- Same QFN-40 footprint with extended temperature range (vs PIC18F45Q43-E/MP)
- Doubles memory when more headroom is needed (vs PIC18F46Q43-I/MP)
- TQFP for hand-prototype, QFN for production (vs PIC18F45Q43-I/PT)
Notes de conception
The 40-pin QFN (5x5 mm, MP) package exposes a large central thermal pad. Always solder this pad to a continuous VSS copper pour stitched with thermal vias (8-16 vias, 0.3 mm drill) to keep junction temperatures within the industrial -40C to +85C range, especially when running at 64 MHz. Keep high-frequency PWM and CCP traces over an unbroken reference plane to reduce ground bounce.
Peripheral Pin Select (PPS) mappings on the PIC18F45Q43-I/MP must be configured in firmware before any peripheral is enabled. Calling PPSUnLock + PPS assignment + PPSLock sequence is required, otherwise peripherals remain mapped to their default pins regardless of firmware intent. A common pitfall is initiating UART/SPI before PPS, resulting in no-bus activity that masquerades as a hardware fault.
Place the 0.1 uF and 1 uF ceramic decoupling capacitors as close as possible to each VDD/VSS pair on the 40-pin QFN. Use wide, short traces - or ideally multiple vias - to keep the inductance under 1 nH. CVD touch measurements are sensitive to high-frequency digital noise on the analog lines; route ADCC inputs away from PWM outputs and add a small RC filter on heavily-switched analog nodes.
XLP mode on the PIC18F45Q43-I/MP delivers sub-microamp sleep current, but you must disable the ADC, PWM, and CLC modules before entering sleep to achieve it. Use the dedicated System Sleep macro in MPLAB XC8 to ensure the proper register sequence; manually gating individual CIPs leaves leakage paths that raise quiescent draw by orders of magnitude.
When routing the three 16-bit PWM outputs to a power stage, keep traces matched within 100 mil to prevent skew between complementary outputs and to keep dead-band timing accurate. Place a 33 ohm series resistor close to the MCU pin to dampen reflections on long traces; avoid running PWM traces parallel to I2C/SPI lines to limit crosstalk.
Informations de conformité
Industrial grade; not AEC-Q100 qualified. For automotive, choose PIC18F45Q43-E/MP (extended temperature) - not AEC-Q100 explicit qualification.
