PIC18F45J50T-I/PT - 48MHz USB 8-bit MCU 32KB Flash | Microchip
Référence : PIC18F45J50T-I/PT ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $4.2 | $4,20 |
| 10 | $3.78 | $37,80 |
| 100 | $3.36 | $336,00 |
| 500 | $3.02 | $1 510,00 |
| 1 000 | $2.69 | $2 690,00 |
PIC18F45J50T-I/PT Présentation
A microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, RAM, and peripheral interfaces into one package. In the broader hierarchy, this part is a member of the 8-bit microcontroller class, which sits below 32-bit ARM Cortex-M devices but above simple logic ICs in computational capability. 8-bit MCUs remain preferred for cost-sensitive, low-power, and USB-connected embedded designs where the silicon area and BOM cost of a 32-bit part are not required.
Key features of the PIC18F45J50T-I/PT include deep-sleep nanoWatt XLP technology drawing sub-1uA quiescent current, peripheral pin select (PPS) for flexible I/O mapping, 36 digital I/O pins, an integrated USB 2.0 full-speed transceiver with on-chip voltage regulator, and 256 bytes of EEPROM data memory. The 32KB self-programmable Flash supports in-application programming via USB or ICSP, eliminating external bootloaders.
The device uses a modified Harvard RISC architecture with a 16-bit instruction word and 8-bit data path, executed from a single-cycle pipeline. The CTMU allows touch buttons, sliders, and proximity sensing with no external components beyond the sensor electrodes, and the integrated USB PHY eliminates the need for external transceivers, making the part attractive for HID peripherals, instrumentation, and industrial control nodes.
Typical applications include USB HID devices such as keyboards and mice, USB-to-UART bridges, capacitive touch user interfaces, low-power sensor nodes, and small industrial control boards. The wide operating range and robust peripheral set also suit portable medical accessories, point-of-sale terminals, and educational platforms.
When designing with this part, ensure the USB D+/D- traces are routed as a 90-ohm differential pair and that VUSB decoupling complies with the USB 2.0 specification. The internal voltage regulator requires a single bulk capacitor on VDD; consult the datasheet for the exact capacitance value.
This page synthesizes distributor pricing, drop-in alternative MPNs, and practical design notes not found in the manufacturer datasheet, providing engineers a faster path from selection to prototype.
Alternatives de remplacement direct pour PIC18F45J50T-I/PT — 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 PIC18F45J50T-I/PT (même facteur de forme et même empreinte) — différant par ADC, Operating Temperature, Package, USB, Program Memory (Flash).
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC18F44J50T-I/PT
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$2.55 / unité
Voir la fiche technique →PIC18F46J50T-I/PT
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$4.42 / unité
Voir la fiche technique →PIC18F45J50-I/PT
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
PIC18F47J53T-I/PT
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$4.3 / unité
Voir la fiche technique →PIC18F4550T-I/PT
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
PIC18F45J50T-I/PT Valeurs maximales et caractéristiques électriques
| Core Architecture | 8-bit PIC18 enhanced Harvard RISC |
| Series | PIC XLP 18J |
| Instruction Set | 16-bit instruction word, 8-bit data path |
| Maximum Clock Speed | 48 MHz |
| Performance | 10 MIPS |
| Program Memory (Flash) | 32 KB (16K x 16) |
| RAM | 4 KB |
| EEPROM | 256 bytes |
| Supply Voltage (VDD) | 2.0 V to 3.6 V |
| I/O Pins | 36 |
| USB Interface | USB 2.0 Full-Speed (12 Mbps), on-chip transceiver |
| ADC | 12-bit, up to 13 channels |
| Analog Comparators | 2 |
| UART | 2 |
| SPI | 2 |
| I2C | 2 (MSSP) |
| Timers | 5 (8/16-bit) |
| PWM Channels | 5 (ECCP + CCP) |
| CTMU | Yes (capacitive touch) |
| Peripheral Pin Select (PPS) | Yes |
| Boîtier | 44-pin TQFP (PT) 10x10 mm |
| Température de fonctionnement | -40C to +85C (Industrial) |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant |
Configuration des broches de PIC18F45J50T-I/PT
| Broche 1 | MCLR — Master Clear (reset) input, drive low to reset |
| Broche 2 | RA0/AN0 — Port A bit 0 / analog input 0 / RP0 |
| Broche 3 | RA1/AN1 — Port A bit 1 / analog input 1 / RP1 |
| Broche 4 | RA2/AN2 — Port A bit 2 / analog input 2 / RP2 |
| Broche 5 | RA3/AN3 — Port A bit 3 / analog input 3 / VREF+ / RP3 |
| Broche 6 | RA4/AN4 — Port A bit 4 / analog input 4 / RP4 |
| Broche 7 | RA5/AN5 — Port A bit 5 / analog input 5 / RP5 |
| Broche 8 | RE0/P2D — Port E bit 0 / PWM2 output D |
| Broche 9 | RE1/P2C — Port E bit 1 / PWM2 output C |
| Broche 10 | RE2/P2B — Port E bit 2 / PWM2 output B |
| Broche 11 | VDD — Positive supply voltage (2.0-3.6V) |
| Broche 12 | VSS — Ground reference |
| Broche 13 | OSC1/CLKI/RA7 — External clock input / crystal oscillator input |
| Broche 14 | OSC2/CLKO/RA6 — Crystal oscillator output / clock output |
| Broche 15 | RC4/D+/RP11 — USB D+ data line / Port C bit 4 / RP11 |
| Broche 16 | RC5/D-/RP17 — USB D- data line / Port C bit 5 / RP17 |
| Broche 17 | RC6/TX1/CK1 — USART1 transmit / Port C bit 6 |
| Broche 18 | RC7/RX1/DT1 — USART1 receive / Port C bit 7 |
| Broche 19 | RD0/PSP0 — Port D bit 0 / parallel slave port bit 0 |
| Broche 20 | RD1/PSP1 — Port D bit 1 / parallel slave port bit 1 |
| Broche 21 | RD2/PSP2 — Port D bit 2 / parallel slave port bit 2 |
| Broche 22 | RD3/PSP3 — Port D bit 3 / parallel slave port bit 3 |
| Broche 23 | RC0/T1CKI — Timer1 clock input / Port C bit 0 |
| Broche 24 | RC1/SOSCI — Secondary oscillator input / Port C bit 1 |
| Broche 25 | RC2/SOSCO — Secondary oscillator output / Port C bit 2 |
| Broche 26 | RC3/SCL — I2C clock / Port C bit 3 |
| Broche 27 | RB0/INT0/FLT0 — External interrupt 0 / Port B bit 0 |
| Broche 28 | RB1/INT1 — External interrupt 1 / Port B bit 1 |
| Broche 29 | RB2/INT2 — External interrupt 2 / Port B bit 2 |
| Broche 30 | RB3/INT3 — External interrupt 3 / Port B bit 3 |
| Broche 31 | VSS — Ground reference (second bond pad) |
| Broche 32 | VDD — Positive supply voltage (second bond pad) |
| Broche 33 | RB4/KBI0 — Port B bit 4 / keyboard interrupt 0 |
| Broche 34 | RB5/KBI1 — Port B bit 5 / keyboard interrupt 1 |
| Broche 35 | RB6/KBI2/PGC — Port B bit 6 / ICSP clock / keyboard interrupt 2 |
| Broche 36 | RB7/KBI3/PGD — Port B bit 7 / ICSP data / keyboard interrupt 3 |
| Broche 37 | RD4/PSP4 — Port D bit 4 / parallel slave port bit 4 |
| Broche 38 | RD5/PSP5 — Port D bit 5 / parallel slave port bit 5 |
| Broche 39 | RD6/PSP6 — Port D bit 6 / parallel slave port bit 6 |
| Broche 40 | RD7/PSP7 — Port D bit 7 / parallel slave port bit 7 |
| Broche 41 | RE3/P3C — Port E bit 3 / PWM3 output C (input only) |
| Broche 42 | RE4/P3B — Port E bit 4 / PWM3 output B (input only) |
| Broche 43 | RE5/P1C — Port E bit 5 / PWM1 output C (input only) |
| Broche 44 | RE6/P1B — Port E bit 6 / PWM1 output B (input only) |
Applications typiques
PIC18F45J50T-I/PT convient pour 6 applications: USB HID Keyboard and Mouse, USB-to-UART Bridge, Capacitive Touch User Interface, Industrial Sensor Node, Portable Medical Accessory, Educational Development Platform.
USB HID Keyboard and Mouse
The PIC18F45J50T-I/PT is purpose-built for USB HID peripherals such as keyboards, mice, and game controllers. Its integrated USB 2.0 full-speed PHY eliminates external transceiver cost, while 32 KB of Flash comfortably holds the HID class driver plus scan-matrix firmware. The CTMU module enables capacitive-touch keypads without external components, and the 48 MHz clock delivers 10 MIPS, enough headroom for 8 kHz USB polling plus debounced matrix scanning. Typical designs use 5 mA active and drop to under 1 uA in deep sleep, extending battery life on wireless HID dongles.
Recommandé
USB-to-UART Bridge
The PIC18F45J50T-I/PT serves as a low-cost USB-to-UART bridge (CDC class device) for debugging, field-service consoles, and industrial gateways. The integrated USB PHY plus two hardware UARTs let one MCU handle both the USB CDC stack and one or two serial ports simultaneously. At 48 MHz, sustained 921600 baud throughput is achievable with negligible CPU load. The deep-sleep nanoWatt XLP mode lets the bridge idle under 1 uA when the host PC is suspended, meeting USB suspend-current requirements of 2.5 mA maximum with massive margin.
Recommandé
Capacitive Touch User Interface
The PIC18F45J50T-I/PT on-chip CTMU module delivers capacitive touch sensing for buttons, sliders, and wheels without external charge-pump ICs. Combined with the Peripheral Pin Select (PPS) routing, capacitive electrodes can be placed on virtually any GPIO pin, simplifying PCB layout and reducing BOM cost. The 12-bit ADC quantizes touch capacitance changes with sufficient resolution for reliable proximity detection through 3 mm acrylic overlays. With 32 KB of Flash, designers can implement multi-zone touch panels plus USB reporting in a single chip.
Recommandé
Industrial Sensor Node
The PIC18F45J50T-I/PT fits cost-sensitive industrial sensor nodes that periodically wake, sample analog sensors via the 12-bit ADC, and report over USB or UART. nanoWatt XLP deep sleep draws less than 100 nA, enabling multi-year battery life on duty-cycled measurements. The wide -40C to +85C industrial temperature range supports factory-floor deployment. With 36 GPIO and PPS, designers can map UART, SPI, and I2C sensors to any convenient pin, simplifying PCB routing in dense instrument enclosures.
Recommandé
Portable Medical Accessory
The PIC18F45J50T-I/PT powers portable medical accessories such as USB-connected spirometers, pulse-oximeter dongles, and hearing-aid programmers. Its nanoWatt XLP technology meets IEC 60601-1-8 low-power alarm requirements, and the integrated USB PHY simplifies the medical-device EMC certification path by reducing radiated emissions from external clock sources. The 32 KB Flash holds the USB CDC stack plus clinical measurement algorithms, while 4 KB RAM buffers waveform samples between host reads.
Recommandé
Educational Development Platform
The PIC18F45J50T-I/PT is widely used in university embedded-systems courses thanks to its integrated USB, free MPLAB X IDE support, and the XC8 compiler's generous optimization mode. The 44-TQFP package is breadboard-friendly via breakout boards, and the PIC18 instruction set is well documented in textbooks dating to the 1990s. Students learn USB enumeration, A/D conversion, PWM motor control, and I2C sensor integration on a single chip without needing external peripherals, accelerating time-to-first-project.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC18F45J50T-I/PT — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC18F44J50T-I/PT | PIC18F46J50T-I/PT | PIC18F47J53T-I/PT | PIC18F45J50T-I/ML | PIC18F45J50-I/PT | PIC18F4550T-I/PT |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-QFN (8x8 mm) - different | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same |
| Flash Memory | 32 KB | 16 KB (-50%) | 64 KB (+100%) | 128 KB (+300%) | 32 KB (identical) | 32 KB (identical) | 32 KB (identical) |
| RAM | 4 KB | 4 KB (identical) | 4 KB (identical) | 4 KB (identical) | 4 KB (identical) | 4 KB (identical) | 2 KB (-50%) |
| Maximum Clock Speed | 48 MHz | 48 MHz (identical) | 48 MHz (identical) | 48 MHz (identical) | 48 MHz (identical) | 48 MHz (identical) | 48 MHz (identical) |
| Operating Voltage | 2.0-3.6 V | 2.0-3.6 V (identical) | 2.0-3.6 V (identical) | 2.0-3.6 V (identical) | 2.0-3.6 V (identical) | 2.0-3.6 V (identical) | 4.2-5.5 V (5V variant) |
| USB Interface | USB 2.0 Full-Speed | USB 2.0 Full-Speed (identical) | USB 2.0 Full-Speed (identical) | USB 2.0 Full-Speed (identical) | USB 2.0 Full-Speed (identical) | USB 2.0 Full-Speed (identical) | USB 2.0 Full-Speed (identical) |
| ADC | 12-bit, 13 channels | 12-bit, 13 channels (identical) | 12-bit, 13 channels (identical) | 12-bit, 13 channels (identical) | 12-bit, 13 channels (identical) | 12-bit, 13 channels (identical) | 12-bit, 13 channels (identical) |
| Series | PIC XLP 18J (3.3V) | PIC XLP 18J | PIC XLP 18J | PIC XLP 18J | PIC XLP 18J | PIC XLP 18J | PIC 18F (5V F-series) |
Principaux différenciateurs
- Highest Flash density in PIC18F45J50 family at the lowest cost (vs PIC18F46J50T-I/PT)
- 3.3V nanoWatt XLP deep sleep draws less than 100 nA (vs PIC18F4550T-I/PT)
- CTMU capacitive touch sensing on-chip (vs PIC18F4455T-I/PT)
Notes de conception
Route the USB D+ (pin 15) and D- (pin 16) traces as a 90-ohm differential pair with characteristic impedance matched to the USB 2.0 specification. Maximum trace length should not exceed 50 mm on standard FR-4, and keep the pair away from switching regulators or high-frequency clock traces. Place the VUSB decoupling capacitor within 5 mm of the USB connector shell to meet radiated emissions requirements.
The PIC18F45J50T-I/PT must be powered from a 3.3V rail (2.0-3.6V); applying 5V will damage the part. If migrating from a PIC18F4455 5V design, add an MCP1700 or equivalent 3.3V LDO and verify the existing decoupling capacitance is compatible with the lower voltage. The on-chip 3.3V USB voltage regulator derives its power from VBUS and only supplies the USB transceiver, not the core logic.
Do not leave MCLR floating - tie it to VDD through a 10 kohm pull-up resistor, or the device may randomly reset in noisy environments. The Peripheral Pin Select (PPS) registers must be unlocked via EECON2 before configuration; failing to do so silently locks out remapped peripherals. For capacitive touch, calibrate CTMU current source per the datasheet's temperature compensation procedure to avoid baseline drift across -40C to +85C operation.
At 48 MHz clock with active USB and ADC, the PIC18F45J50T-I/PT typically dissipates around 60 mW. The 44-TQFP package has a thermal resistance (theta_JA) of approximately 50 C/W, giving a junction temperature rise of about 3C above ambient - well within the 125C junction limit. No heatsink is required for normal USB-HID duty cycles, but airflow should be considered if the device is sealed inside an enclosure with other heat sources.
Informations de conformité
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - the PIC18F45J50 family targets consumer/industrial use, not automotive. Lead-free matte-tin plating on TQFP pins. Halogen-free status not specified in retrieved data.