PIC18F45Q43-I/P - 8-Bit 64MHz 32KB Flash MCU 40-PDIP | Microchip
Référence : PIC18F45Q43-I/P ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $4.2 | $4,20 |
| 10 | $3.78 | $37,80 |
| 100 | $3.35 | $335,00 |
| 500 | $2.95 | $1 475,00 |
| 1 000 | $2.62 | $2 620,00 |
PIC18F45Q43-I/P Présentation
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory (Flash), peripherals, and I/O on one die, optimized for embedded control applications where deterministic behavior, low cost, and low power matter more than raw throughput. The PIC18F belongs to Microchip's PIC18 advanced 8-bit architecture family, which targets real-time control and connectivity in a wide range of consumer, industrial, and automotive subsystems. Within that hierarchy, the PIC18-Q43 sub-family (PIC18 → PIC18F → PIC18F-Q43 → PIC18F45Q43) is positioned for advanced hardware-customization designs that need DMA, CLCs, and high-resolution PWM without resorting to a 16-bit or 32-bit MCU.
Key features include 64 MHz operation from up to 64 MHz internal oscillator, six DMA channels, three 16-bit PWMs, five UART modules (one supporting LIN/DMX/DALI), two SPI/I2C peripherals, the ADCC with hardware averaging/oversampling, zero-cross detect (ZCD), a fixed voltage reference (1.024/2.048/4.096 V), Windowed Watchdog Timer (WWDT), Cyclic Redundancy Check (CRC/SCAN) module, and 36-level interrupt vectoring for low-latency response.
Typical applications include capacitive touch user interfaces, lighting controls, motor control (BLDC/PMSM via FOC), USB-to-UART bridges, industrial sensor hubs, and low-power battery-powered IoT endpoints where XLP (eXtreme Low Power) sleep current extends battery life.
Design trade-off: choose the 40-PDIP (PIC18F45Q43-I/P) for through-hole prototyping, educational breadboarding, and socketed designs; choose the 44-TQFP (PIC18F45Q43-I/PT) when moving to surface-mount production with the same die.
This page synthesizes distributor pricing, drop-in alternatives selected from Microchip's same-family portfolio and cross-brand sources, and practical design notes not found in the manufacturer datasheet alone.
Alternatives de remplacement direct pour PIC18F45Q43-I/P — 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/P (même facteur de forme et même empreinte) — différant par ADC, Package, Program Memory (Flash), Core, Operating Temperature.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC18F45Q43-I/PT
✅ Remplacement direct✓ En stock
$1.58 / unité
Voir la fiche technique →PIC18F46Q43-I/P
✅ Remplacement direct✓ En stock
$1.52 / unité
Voir la fiche technique →PIC18F45K42-I/P
✅ Remplacement direct✓ En stock
$1.68 / unité
Voir la fiche technique →PIC18F45K22-I/P
✅ Remplacement direct✓ En stock
$2.1 / unité
Voir la fiche technique →PIC18F4580-I/P
✅ Remplacement direct✓ En stock
$5.1 / unité
Voir la fiche technique →PIC18F45Q43-I/P Valeurs maximales et caractéristiques électriques
| Core Architecture | PIC18 8-bit RISC |
| Program Memory (Flash) | 32 KB (32K x 8) |
| RAM | 2 KB |
| EEPROM | 1 KB |
| Maximum CPU Frequency | 64 MHz |
| Operating Voltage Range | 1.8 V to 5.5 V |
| ADC | 12-bit ADCC with computation and CVD |
| DAC | 5-bit DAC |
| Comparators | Yes |
| PWM | 3x 16-bit dual PWMs (6 outputs) |
| DMA Controllers | 6 channels |
| UART | 5 (one supports LIN/DMX/DALI) |
| SPI | Yes |
| I2C | Yes |
| CLC (Configurable Logic Cells) | Yes |
| Zero-Cross Detect (ZCD) | Yes |
| Windowed Watchdog Timer | Yes (WWDT) |
| CRC / SCAN | Yes |
| Voltage Reference | 1.024 V / 2.048 V / 4.096 V fixed |
| XLP (eXtreme Low Power) Technology | Yes |
| Nombre de broches | 40 |
| Boîtier | 40-PDIP (through-hole) |
| Température de fonctionnement | -40C to +85C (industrial, -I suffix) |
| Statut RoHS | Compliant |
Configuration des broches de PIC18F45Q43-I/P
| Broche 1 | MCLR/VPP — Master Clear (reset) input / programming voltage |
| Broche 2 | RA0/ANO0 — PORTA bit 0 / ADC input |
| Broche 3 | RA1/ANO1 — PORTA bit 1 / ADC input |
| Broche 4 | RA2/ANO2 — PORTA bit 2 / ADC input |
| Broche 5 | RA3/ANO3 — PORTA bit 3 / ADC input |
| Broche 6 | RA4/ANO4 — PORTA bit 4 / ADC input |
| Broche 7 | RA5/ANO5 — PORTA bit 5 / ADC input |
| Broche 8 | RE0 — PORTE bit 0 |
| Broche 9 | RE1 — PORTE bit 1 |
| Broche 10 | RE2 — PORTE bit 2 |
| Broche 11 | VDD — Positive power supply |
| Broche 12 | VSS — Ground reference |
| Broche 13 | OSC1/CLKI — Oscillator input / external clock |
| Broche 14 | OSC2/CLKO — Oscillator output |
| Broche 15 | RC0 — PORTC bit 0 |
| Broche 16 | RC1 — PORTC bit 1 |
| Broche 17 | RC2 — PORTC bit 2 |
| Broche 18 | RC3 — PORTC bit 3 |
| Broche 19 | RD0 — PORTD bit 0 |
| Broche 20 | RD1 — PORTD bit 1 |
| Broche 21 | RD2 — PORTD bit 2 |
| Broche 22 | RD3 — PORTD bit 3 |
| Broche 23 | RC4 — PORTC bit 4 |
| Broche 24 | RC5 — PORTC bit 5 |
| Broche 25 | RC6 — PORTC bit 6 |
| Broche 26 | RC7 — PORTC bit 7 |
| Broche 27 | RD4 — PORTD bit 4 |
| Broche 28 | RD5 — PORTD bit 5 |
| Broche 29 | RD6 — PORTD bit 6 |
| Broche 30 | RD7 — PORTD bit 7 |
| Broche 31 | VSS — Ground reference |
| Broche 32 | VDD — Positive power supply |
| Broche 33 | RB0/INT — PORTB bit 0 / external interrupt |
| Broche 34 | RB1 — PORTB bit 1 |
| Broche 35 | RB2 — PORTB bit 2 |
| Broche 36 | RB3 — PORTB bit 3 |
| Broche 37 | RB4 — PORTB bit 4 |
| Broche 38 | RB5 — PORTB bit 5 |
| Broche 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Broche 40 | RB7/PGD — PORTB bit 7 / ICSP data |
Applications typiques
PIC18F45Q43-I/P convient pour 6 applications: Capacitive Touch User Interface, BLDC / PMSM Motor Control, Industrial Sensor Hub & 4-20 mA Conditioning, LED Lighting & Dimming Controllers, USB-to-UART / Sensor Bridge, Low-Power Battery IoT Endpoint.
Capacitive Touch User Interface
The PIC18F45Q43-I/P's 12-bit ADCC with Computation supports Capacitive Voltage Divider (CVD) hardware techniques that automate charge/discharge cycling, averaging, and oversampling for robust proximity and touch detection across multiple keys. With up to 36 I/O pins on the 40-PDIP, designers can scan 16-24 touch electrodes without an external touch IC, reducing BOM cost. The ADCC's hardware threshold comparison delivers button-press events directly to the CPU interrupt, keeping firmware lean. Typical touch-key latency is sub-10 ms with proper guarding and shielding.
Recommandé
BLDC / PMSM Motor Control
Three 16-bit dual PWM channels provide six PWM outputs with programmable dead-band and complementary pairs ideal for three-phase motor inverters at switching frequencies up to several hundred kHz. DMA channels move ADC current-sense samples into memory without CPU intervention, freeing cycles for field-oriented-control loops. The ZCD and comparators handle back-EMF zero-crossing in sensorless trapezoidal schemes, while CLCs combine peripheral events for hardware-level fault gating. Designers can implement sensored or sensorless FOC for fans, pumps, and small appliances.
Recommandé
Industrial Sensor Hub & 4-20 mA Conditioning
The 12-bit ADCC handles ratiometric bridge sensors, thermocouples, and RTDs with hardware averaging for low-noise conversion in noisy industrial environments. The 5-bit DAC and 1.024/2.048/4.096 V fixed voltage reference provide excitation sources or setpoints for 4-20 mA current loops. Five UARTs enable simultaneous LIN, RS-485, and DMX/DALI connectivity for lighting and sensor-network master nodes. Industrial temperature grade (-40 C to +85 C) and the 40-PDIP package suit panel-mount and DIN-rail designs.
Recommandé
LED Lighting & Dimming Controllers
The PIC18F45Q43-I/P's 16-bit PWMs deliver flicker-free dimming down to 0.1 % duty resolution, suitable for architectural and theatrical lighting. DMX512A and DALI receive from the dedicated UART simplify networked dimming drivers without extra transceivers. The ZCD module synchronizes TRIAC phase-angle dimming to mains zero-cross, while the ADCC reads analog 0-10 V dimming inputs. CLCs can mix PWM and digital gates to drive constant-current buck or boost LED driver stages.
Recommandé
USB-to-UART / Sensor Bridge
Five UARTs (one LIN/DMX/DALI capable) and DMA channels let the PIC18F45Q43-I/P serve as a multi-channel sensor-to-host bridge, aggregating field-bus data without CPU bottlenecks. The 32 KB Flash holds lightweight protocol stacks (Modbus, LIN, DMX), while hardware CRC/SCAN validates payload integrity. The 40-PDIP package is ideal for breadboard prototypes and OEM evaluation kits where socketed designs ease firmware iteration.
Recommandé
Low-Power Battery IoT Endpoint
XLP (eXtreme Low Power) technology on the PIC18F45Q43-I/P delivers sub-microamp sleep currents with RTC and interrupt wake from WDT, ADC, comparators, or CLC. The 1.8 V minimum supply allows single-cell alkaline or Li-coin operation spanning years of battery life. CLCs combine peripheral events to wake the CPU only on qualified sensor changes, minimizing average current. The 32 KB Flash stores MQTT-SN or BLE-beacon payloads for remote sensor nodes.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC18F45Q43-I/P — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC18F45Q43-I/PT | PIC18F46Q43-I/P | PIC18F45K42-I/P | PIC18F45K22-I/P | PIC18F4580-I/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 40-PDIP (through-hole) | 44-TQFP (SMD, same die) | 40-PDIP - same | 40-PDIP - same | 40-PDIP - same | 40-PDIP - same |
| CPU | PIC18 8-bit, 64 MHz | PIC18 8-bit, 64 MHz | PIC18 8-bit, 64 MHz | PIC18 8-bit, 64 MHz | PIC18 8-bit, 64 MHz | PIC18 8-bit, 48 MHz |
| Flash | 32 KB | 32 KB | 64 KB | 32 KB | 32 KB | 32 KB |
| RAM | 2 KB | 2 KB | 4 KB | 2 KB | 1.5 KB | 1.5 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 256 B | 256 B |
| DMA Channels | 6 | 6 | 6 | 0 | 0 | 0 |
| PWM | 3x 16-bit dual (6 outputs) | 3x 16-bit dual (6 outputs) | 3x 16-bit dual (6 outputs) | 4x 10-bit PWM (8 outputs) | 2x CCP + 2x ECCP | 1x CCP + 1x ECCP |
| ADC | 12-bit ADCC w/ CVD | 12-bit ADCC w/ CVD | 12-bit ADCC w/ CVD | 12-bit ADCC w/ CVD | 10-bit ADC | 10-bit ADC |
| UART Count | 5 (1 LIN/DMX/DALI) | 5 (1 LIN/DMX/DALI) | 5 (1 LIN/DMX/DALI) | 2 | 2 | 1 + USB |
Principaux différenciateurs
- Six DMA channels (vs PIC18F45K42-I/P)
- 16-bit PWM resolution (vs PIC18F45K22-I/P)
- Hardware ADCC with CVD (vs PIC18F4580-I/P)
- Five UARTs for multi-protocol support (vs PIC18F45K42-I/P)
Notes de conception
Place a 100 nF decoupling capacitor as close as possible to each VDD/VSS pair (pins 11/12 and 31/32 on the 40-PDIP). Add a bulk 10 uF tantalum or ceramic at the board entry to suppress MCLR glitches during in-circuit serial programming. The Q43 family supports VDD from 1.8 V to 5.5 V; choose a low-Iq LDO such as MCP1700 for battery applications.
Do not leave MCLR floating; tie it to VDD through a 10 kohm resistor with a 100 nF cap to ground for noise immunity. Without proper MCLR biasing, the device may randomly enter reset during EMI events. ICSP requires RB6 (PGC) and RB7 (PGD) to remain accessible; do not populate these as outputs without isolation resistors.
Route the 64 MHz oscillator traces as short as possible and keep the crystal within 10 mm of OSC1/OSC2 to minimize EMI. For capacitive-touch CVD layouts, guard-ring the touch electrodes and add ground-fill stitching vias around the sensor pads to prevent false triggers from adjacent signal traces. The 40-PDIP package is socket-friendly for prototype flashing; reserve a 6-pin ICSP header footprint even on production boards for field updates.
Estimated: at full 64 MHz CPU activity with all peripherals active, the 40-PDIP (theta_JA around 50 C/W in still air) dissipates under 100 mW, yielding a junction temperature rise well below 5 C. No thermal management is required for typical embedded applications; however, in sealed enclosures above 60 C ambient, verify with an IR probe during worst-case firmware burn-in.
Informations de conformité
RoHS and REACH compliant per Microchip product environmental compliance documentation. Industrial -40 C to +85 C temperature grade (-I suffix); not AEC-Q100 qualified for automotive - use automotive-grade PIC18F-Q43 variants for that.
