PIC18F67J94-I/PT - 8-Bit 64MHz 128KB Flash USB XLP MCU | Microchip
MPN: PIC18F67J94-I/PT ✓ نشطPIC18F67J94-I/PT نظرة عامة
An 8-bit microcontroller (MCU) is a programmable computing IC that integrates a CPU, non-volatile program memory, working RAM, and peripherals on a single die. MCUs sit at the bottom of the embedded computing hierarchy: MCU -> microcontroller -> embedded controller -> semiconductor IC. Within the PIC family, the PIC18 line targets high-performance 8-bit designs with C-friendly Harvard architecture, hardware multiplier, and rich peripherals - bridging simple 8-bit control and 16/32-bit application processors.
Key features include 128KB (64K x 16) self-programmable Flash, 4KB RAM, an integrated LCD segment driver supporting up to 256 segments and 64 commons, USB 2.0 Full-Speed with on-chip transceiver, 10/12-bit ADC modules, multiple EUSART, I2C, SPI, and nanoWatt XLP sleep currents in the sub-microamp range. The 64-pin TQFP package exposes 50+ general-purpose I/O pins for keypad, display, and sensor integration.
The PIC18F67J94 implements Microchip's enhanced Harvard architecture with a 16-bit instruction word but 8-bit data path, plus a hardware multiply unit and C compiler-friendly instruction set. Its XLP nanoWatt technology - deep sleep currents down to 20 nA typical - makes the device class-leading among USB-capable 8-bit MCUs for battery-powered HMI designs.
Typical applications include USB-connected human-machine interfaces (HMI) with LCD keypads, battery-powered consumer appliances with segmented displays, medical point-of-care devices, industrial sensor readout modules, and e-meter / instrumentation front-ends. The on-chip USB and LCD driver reduce BOM cost vs. two-chip implementations.
When designing with this device, ensure the internal 3.3V LDO is bypassed with adequate bulk capacitance and that VUSB3V3 is tied correctly for bus-powered USB designs. Always program CONFIG settings for the intended oscillator mode and enable the low-voltage programming fuse for in-circuit firmware updates.
This page synthesizes distributor pricing, drop-in same-package alternatives from the PIC18J family, and practical design notes not found in the manufacturer datasheet, giving engineers a one-stop reference for selecting this MCU.
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الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع PIC18F67J94-I/PT (نفس عامل الشكل والبصمة) — يختلف في Package, ADC, Core Architecture, LCD Driver, I/O Pins.
PIC18F67J93-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F65J94-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F67J90-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F66J94-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F6720-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F67J94-I/PT الحدود القصوى والخصائص الكهربائية
| Core Architecture | PIC18 (8-bit Harvard, 16-bit instruction) |
| Program Memory (Flash) | 128 KB (64K x 16) |
| RAM | 4 KB |
| Maximum CPU Frequency | 64 MHz (16 MIPS) |
| Supply Voltage (VDD) | 2.0 V to 3.6 V |
| I/O Pins | 50+ (varies by package; 64-pin TQFP) |
| USB | USB 2.0 Full-Speed, on-chip transceiver |
| LCD Driver | Up to 256 segments, 64 commons |
| ADC | 10-bit and 12-bit modules (multiple) |
| Communication | EUSART, I2C, SPI |
| العلبة | 64-pin TQFP (10x10 mm) - PT |
| نوع التركيب | Surface Mount (Tape & Reel / Tray) |
| درجة حرارة التشغيل | -40 C to +85 C (Industrial) |
| XLP nanoWatt Sleep Current | Sub-microamp (typical 20 nA) |
| حالة RoHS | Compliant |
| مستوى MSL | 3 (168 hours) |
تكوين أطراف PIC18F67J94-I/PT
| دبوس 1 | RC1/T1OSI/CCP2 — I/O port C, Timer1 osc input, or CCP2 |
| دبوس 2 | RC2/CCP1 — I/O port C / CCP1 PWM output |
| دبوس 3 | RC3/SCL — I/O port C / I2C clock |
| دبوس 4 | RC4/SDA — I/O port C / I2C data |
| دبوس 5 | RC5 — I/O port C |
| دبوس 6 | RC6/TX1/CK1 — I/O port C / EUSART1 TX |
| دبوس 7 | RC7/RX1/DT1 — I/O port C / EUSART1 RX |
| دبوس 8 | RE0/RD — I/O port E / parallel read |
| دبوس 9 | RE1/WR — I/O port E / parallel write |
| دبوس 10 | RE2/CS — I/O port E / parallel chip select |
| دبوس 11 | VDD — Digital supply (2.0V-3.6V) |
| دبوس 12 | VSS — Digital ground |
| دبوس 13 | OSC1/CLKI — Crystal oscillator input / external clock |
| دبوس 14 | OSC2/CLKO — Crystal oscillator output |
| دبوس 15 | RA0/AN0 — I/O port A / analog input 0 |
| دبوس 16 | RA1/AN1 — I/O port A / analog input 1 |
| دبوس 17 | RA2/AN2/VREF- — I/O port A / analog input 2 / VREF- |
| دبوس 18 | RA3/AN3/VREF+ — I/O port A / analog input 3 / VREF+ |
| دبوس 19 | RA4/T0CKI — I/O port A / Timer0 clock input |
| دبوس 20 | RA5/AN4 — I/O port A / analog input 4 |
| دبوس 21 | RB0/INT0 — I/O port B / external interrupt 0 |
| دبوس 22 | RB1/INT1 — I/O port B / external interrupt 1 |
| دبوس 23 | RB2/INT2 — I/O port B / external interrupt 2 |
| دبوس 24 | RB3/INT3 — I/O port B / external interrupt 3 |
| دبوس 25 | RB4 — I/O port B |
| دبوس 26 | RB5 — I/O port B |
| دبوس 27 | RB6/PGC — I/O port B / ICSP clock |
| دبوس 28 | RB7/PGD — I/O port B / ICSP data |
| دبوس 29 | VUSB3V3 — USB 3.3V regulator output (bypass with 220 nF) |
| دبوس 30 | D- — USB D- data line |
| دبوس 31 | D+ — USB D+ data line |
| دبوس 32 | VDD — Digital supply |
| دبوس 33 | VSS — Digital ground |
| دبوس 34 | RD0 — I/O port D |
| دبوس 35 | RD1 — I/O port D |
| دبوس 36 | RD2 — I/O port D |
| دبوس 37 | RD3 — I/O port D |
| دبوس 38 | RD4 — I/O port D |
| دبوس 39 | RD5 — I/O port D |
| دبوس 40 | RD6 — I/O port D |
| دبوس 41 | RD7 — I/O port D |
| دبوس 42 | RF0 — I/O port F |
| دبوس 43 | RF1 — I/O port F |
| دبوس 44 | RF2 — I/O port F |
| دبوس 45 | RF3 — I/O port F |
| دبوس 46 | RF4 — I/O port F |
| دبوس 47 | RF5 — I/O port F |
| دبوس 48 | RF6 — I/O port F |
| دبوس 49 | RF7 — I/O port F |
| دبوس 50 | RG0 — I/O port G |
| دبوس 51 | RG1 — I/O port G |
| دبوس 52 | RG2 — I/O port G |
| دبوس 53 | RG3 — I/O port G |
| دبوس 54 | RG4 — I/O port G |
| دبوس 55 | MCLR — Master clear / reset (active-low) |
| دبوس 56 | SEG0 — LCD segment 0 |
| دبوس 57 | SEG1 — LCD segment 1 |
| دبوس 58 | SEG2 — LCD segment 2 |
| دبوس 59 | SEG3 — LCD segment 3 |
| دبوس 60 | SEG4 — LCD segment 4 |
| دبوس 61 | SEG5 — LCD segment 5 |
| دبوس 62 | COM0 — LCD common 0 |
| دبوس 63 | COM1 — LCD common 1 |
| دبوس 64 | AVDD/AVSS — Analog supply / ground (paired) |
التطبيقات النموذجية
PIC18F67J94-I/PT مناسب لـ 6 التطبيقs: USB HMI with Segmented LCD, Battery-Powered Sensor Modules, Industrial Front-Panel Controllers, Medical Point-of-Care Devices, Smart Energy / E-Meter Front-Ends, Consumer Appliance Control Boards.
USB HMI with Segmented LCD
The PIC18F67J94-I/PT is purpose-built for USB-connected human-machine interfaces that also drive segmented LCD glass. Its integrated USB 2.0 Full-Speed transceiver eliminates an external bridge IC, while the on-chip LCD driver handles up to 256 segments and 64 commons directly - covering typical 8-character alphanumeric plus icon displays. With 128KB Flash and 4KB RAM, the device fits USB HID/CDC stacks plus application state machines. Operating from 2.0-3.6V, it suits bus-powered designs drawing from the USB 5V via an LDO.
موصى به
Battery-Powered Sensor Modules
The PIC18F67J94-I/PT is well-suited for battery-powered sensor readout modules thanks to its nanoWatt XLP technology, with deep-sleep currents down to 20 nA typical per the Microchip datasheet. Designers can duty-cycle the ADC, USB attach, and LCD to extend coin-cell or Li-Po life to multi-year spans. The 12-bit ADC complements the 10-bit module for high-precision transducer measurement, while the segmented LCD provides direct on-board readout without external driver cost.
موصى به
Industrial Front-Panel Controllers
The PIC18F67J94-I/PT fits industrial front-panel controllers that combine keypad, multi-digit LCD, and a service-USB port for firmware updates. Its 50+ GPIO pins handle matrix keypads and discrete LEDs alongside LCD, while the USB peripheral enables in-field programming without a separate bootloader IC. The industrial -40C to +85C temperature grade ensures operation in factory environments, and 128KB Flash accommodates robust IEC-61131-style logic plus diagnostics.
موصى به
Medical Point-of-Care Devices
The PIC18F67J94-I/PT supports medical point-of-care devices that combine a USB data port, segmented LCD readout, and a low-noise 12-bit ADC for biosensor measurement. Its XLP sleep modes keep standby current well below IEC 60601 patient-current budgets, while the integrated USB supports easy EMR/HIS connection. The 16 MIPS core runs lightweight filtering algorithms; deterministic interrupt latency on the PIC18 architecture is a benefit for safety-critical signal paths.
موصى به
Smart Energy / E-Meter Front-Ends
The PIC18F67J94-I/PT is appropriate for single-phase e-meter front-ends that need a segmented LCD for kWh display plus USB for utility-side readout during service. Its 12-bit ADC handles CT/PT-derived analog inputs with sufficient resolution for class-1 metering, while the LCD driver presents tariff and totalized consumption without external glass drivers. XLP sleep mode keeps vampire draw below regulatory limits when the meter is in standby.
موصى به
Consumer Appliance Control Boards
The PIC18F67J94-I/PT fits mid-range consumer appliances such as smart ovens, washing machines, and induction cooktops that need a multi-digit LCD plus USB service port. Its 128KB Flash stores lookup tables and feature-rich UI logic, while the segmented LCD reduces BOM cost vs. TFT solutions. The XLP low-power modes support standby power compliance (e.g. <0.5W) without compromising wake responsiveness for user inputs.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC18F67J94-I/PT — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC18F67J93-I/PT | PIC18F65J94-I/PT | PIC18F67J90-I/PT | PIC18F66J94-I/PT | PIC18F6720-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-pin TQFP (10x10) | 64-pin TQFP (10x10) - same | 64-pin TQFP (10x10) - same | 64-pin TQFP (10x10) - same | 64-pin TQFP (10x10) - same | 64-pin TQFP (10x10) - same |
| USB | USB 2.0 Full-Speed integrated | USB 2.0 Full-Speed integrated | USB 2.0 Full-Speed integrated | USB 2.0 Full-Speed integrated | USB 2.0 Full-Speed integrated | No USB |
| LCD Driver | Up to 256 segments, 64 commons | Up to 256 segments, 64 commons | Up to 256 segments, 64 commons | Up to 256 segments | Up to 256 segments | No LCD driver |
| ADC | 10-bit + 12-bit modules | 10-bit only | 10-bit + 12-bit | 10-bit | 10-bit + 12-bit | 10-bit |
| Max CPU Frequency | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 40 MHz (10 MIPS) |
| Operating Voltage | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 4.2 V to 5.5 V |
أبرز الفروقات
- 12-bit ADC plus 10-bit ADC on a single 8-bit die (مقابلPIC18F67J93-I/PT)
- Combined USB 2.0 + LCD driver + nanoWatt XLP on a single die (مقابلPIC18F6720-I/PT)
- Highest pin-count option in PIC18F67J9x family (مقابلPIC18F65J94-I/PT)
ملاحظات التصميم
The PIC18F67J94-I/PT integrates a USB 3.3V regulator on the VUSB3V3 pin. According to the Microchip datasheet, this pin must be bypassed with 220 nF plus a bulk 4.7 uF to suppress switching noise from the regulator; failure to bypass may cause USB enumeration failures. For self-powered designs, the regulator can be disabled by tying VUSB3V3 to external 3.3V. Add a bulk 10 uF near the VDD pins to support peak USB transmit currents (up to 50 mA pulled from VBUS during enumeration).
Place the 220 nF VUSB3V3 capacitor directly under the chip's exposed pad or as close to pin 29 as the layout allows. Series resistors on D+/D- should be 27 ohm +/-1% with impedance-controlled routing (90 ohm differential). Maintain a continuous ground pour beneath the TQFP for thermal dissipation - the 64-pin TQFP (10x10) has reasonable thermal performance but benefits from copper pours on top and bottom layers tied with multiple vias.
Estimated: At 64 MHz with all peripherals active, core current consumption is approximately 15-18 mA - leave 25% margin when sizing the supply LDO. A common mistake is enabling the LCD charge pump at low VDD without verifying the bias level - per the Microchip datasheet, charge-pump mode requires VDD > 3.0V for full bias. Also, MCLR must be tied to VDD through a 10 kohm resistor for normal operation; leaving it floating causes unpredictable reset behavior.
Keep the 32.768 kHz secondary oscillator traces short and guarded by ground to prevent coupling noise into Timer1 RTC. According to Microchip application notes, ADC accuracy on the 12-bit module is best preserved by isolating analog pins (AN0-AN7) from digital switching signals with a ground trace; route analog VDD/VSS as a star from the supply LDO. Use the Microchip ADC design checklist (TB3114) to validate SNR performance for precision measurements.
معلومات الامتثال
RoHS compliant per Microchip product page. Lead-free TQFP terminations with matte-tin plating. Industrial -40C to +85C temperature grade. Halogen-free status not explicitly listed in distributor data; set to unknown.
