PIC18F8493-I/PT - 16KB Flash LCD MCU 12-bit ADC | Microchip
MPN: PIC18F8493-I/PT ✓ Hoạt độngPIC18F8493-I/PT Tóm tắt
An 8-bit microcontroller (MCU) is a small, low-power computer-on-a-chip integrating a CPU, memory, and peripherals onto a single die. PIC microcontrollers belong to the 8-bit MCU class, hierarchically categorized as: PIC18 -> 8-bit PIC -> PIC microcontroller -> microcontroller -> integrated circuit -> semiconductor. Within power-constrained embedded designs, 8-bit MCUs dominate cost-sensitive applications where deterministic performance and peripheral integration outweigh raw throughput.
Key features of the PIC18F8493-I/PT include: an integrated LCD driver capable of up to 192 segments; a 12-bit Analog-to-Digital Converter with up to 12 input channels; nanoWatt power management with multiple idle and sleep modes; an enhanced CCP module, USB 2.0 Full-Speed support (in select variants), and a 10-bit DAC reference. Its nanoWatt technology enables deep sleep currents in the microampere range, suiting battery-powered metering.
The device implements a Harvard-architecture RISC core with a single-cycle 8x8 hardware multiplier, dual oscillator options for Fail-Safe Clock Monitor, and an in-circuit debugger interface. The 80-pin TQFP exposes extensive I/O (>68 pins), three USART peripherals, an SPI/I2C master/slave pair, and capture/compare/PWM modules suitable for mixed-signal control.
Typical applications include handheld meters, thermostats, home security panels, and power/gas/water metering where the integrated LCD driver and 12-bit ADC are mission-critical. The wide 2.0V-5.5V VDD range also suits industrial sensor transmitters and IoT edge nodes.
When designing with this MCU, allocate I/O pins carefully because the 80-pin TQFP is the largest variant in the PIC18F8493 family and shares pinout with the PIC18F8490 for design reuse. Place a 100 nF decoupling capacitor as close as possible to each VDD/AVDD pin pair and ensure the MCLR pin is properly pulled up to avoid spurious resets.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing engineering decision support across procurement and design-in workflows.
Bộ thay thế dễ dàng lắp đặt cho PIC18F8493-I/PT — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC18F8493-I/PT (cùng hình factor và footprint) — khác nhau ở Package, ADC, LCD Driver, Core, MSL Level.
PIC18F8490-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F8493-I/PT
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Xem tài liệu →PIC18F8493-I/PT Tỷ lệ tối đa & tính chất điện
| Core | PIC18F (8-bit RISC) |
| Program Memory (Flash) | 16 KB (8K x 16) |
| RAM | 768 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 40 MHz (10 MIPS) |
| Operating Voltage (VDD) | 2.0 V to 5.5 V |
| ADC | 12-bit, up to 12 channels |
| LCD Driver | Up to 192 segments |
| Hộp | 80-pin TQFP (PT) |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 3 (per JEDEC J-STD-020) |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
| Peripherals | CCP, USART, SPI, I2C, 10-bit DAC ref |
| Power Technology | nanoWatt |
Cấu hình chân PIC18F8493-I/PT
| Chân 1 | RC0 — I/O port C bit 0 / digital I/O |
| Chân 2 | RC1 — I/O port C bit 1 / digital I/O |
| Chân 3 | RC2 — I/O port C bit 2 / digital I/O |
| Chân 4 | RC3 — I/O port C bit 3 / digital I/O |
| Chân 5 | RC4 — I/O port C bit 4 / digital I/O |
| Chân 6 | RC5 — I/O port C bit 5 / digital I/O |
| Chân 7 | RC6 — I/O port C bit 6 / TX1 |
| Chân 8 | RC7 — I/O port C bit 7 / RX1 |
| Chân 9 | RD0 — I/O port D bit 0 / PSP |
| Chân 10 | RD1 — I/O port D bit 1 / PSP |
| Chân 11 | RD2 — I/O port D bit 2 / PSP |
| Chân 12 | RD3 — I/O port D bit 3 / PSP |
| Chân 13 | RD4 — I/O port D bit 4 / PSP |
| Chân 14 | RD5 — I/O port D bit 5 / PSP |
| Chân 15 | RD6 — I/O port D bit 6 / PSP |
| Chân 16 | RD7 — I/O port D bit 7 / PSP |
| Chân 17 | VSS1 — Ground |
| Chân 18 | VDD1 — Positive supply (2.0V-5.5V) |
| Chân 19 | VSS2 — Ground |
| Chân 20 | VDD2 — Positive supply (2.0V-5.5V) |
| Chân 21 | RB0 — I/O port B bit 0 / INT0 |
| Chân 22 | RB1 — I/O port B bit 1 / INT1 |
| Chân 23 | RB2 — I/O port B bit 2 / INT2 |
| Chân 24 | RB3 — I/O port B bit 3 / CCP2 |
| Chân 25 | RB4 — I/O port B bit 4 |
| Chân 26 | RB5 — I/O port B bit 5 |
| Chân 27 | RB6 — I/O port B bit 6 / PGC (ICSP clock) |
| Chân 28 | RB7 — I/O port B bit 7 / PGD (ICSP data) |
| Chân 29 | MCLR — Master Clear (reset) input |
| Chân 30 | RA0 — I/O port A bit 0 / AN0 |
| Chân 31 | RA1 — I/O port A bit 1 / AN1 |
| Chân 32 | RA2 — I/O port A bit 2 / AN2 |
| Chân 33 | RA3 — I/O port A bit 3 / AN3 / VREF+ |
| Chân 34 | RA4 — I/O port A bit 4 / T0CKI |
| Chân 35 | RA5 — I/O port A bit 5 / AN4 |
| Chân 36 | RE0 — I/O port E bit 0 / LCD segment driver |
| Chân 37 | RE1 — I/O port E bit 1 / LCD segment driver |
| Chân 38 | RE2 — I/O port E bit 2 / LCD segment driver |
| Chân 39 | RE3 — I/O port E bit 3 / LCD segment driver |
| Chân 40 | RE4 — I/O port E bit 4 / LCD segment driver |
| Chân 41 | RE5 — I/O port E bit 5 / LCD segment driver |
| Chân 42 | RE6 — I/O port E bit 6 / LCD segment driver |
| Chân 43 | RE7 — I/O port E bit 7 / LCD segment driver |
| Chân 44 | RF0 — I/O port F bit 0 / LCD segment driver |
| Chân 45 | RF1 — I/O port F bit 1 / LCD segment driver |
| Chân 46 | RF2 — I/O port F bit 2 / LCD segment driver |
| Chân 47 | RF3 — I/O port F bit 3 / LCD segment driver |
| Chân 48 | RF4 — I/O port F bit 4 / LCD segment driver |
| Chân 49 | RF5 — I/O port F bit 5 / LCD segment driver |
| Chân 50 | RF6 — I/O port F bit 6 / LCD segment driver |
| Chân 51 | RF7 — I/O port F bit 7 / LCD segment driver |
| Chân 52 | RG0 — I/O port G bit 0 / LCD segment driver |
| Chân 53 | RG1 — I/O port G bit 1 / LCD segment driver |
| Chân 54 | RG2 — I/O port G bit 2 / LCD segment driver |
| Chân 55 | RG3 — I/O port G bit 3 / LCD segment driver |
| Chân 56 | RG4 — I/O port G bit 4 / LCD segment driver |
| Chân 57 | RG5 — I/O port G bit 5 / LCD segment driver |
| Chân 58 | RG6 — I/O port G bit 6 / LCD segment driver |
| Chân 59 | RG7 — I/O port G bit 7 / LCD segment driver |
| Chân 60 | RH0 — I/O port H bit 0 / LCD segment driver |
| Chân 61 | RH1 — I/O port H bit 1 / LCD segment driver |
| Chân 62 | RH2 — I/O port H bit 2 / LCD segment driver |
| Chân 63 | RH3 — I/O port H bit 3 / LCD segment driver |
| Chân 64 | RH4 — I/O port H bit 4 / LCD segment driver |
| Chân 65 | RH5 — I/O port H bit 5 / LCD segment driver |
| Chân 66 | RH6 — I/O port H bit 6 / LCD segment driver |
| Chân 67 | RH7 — I/O port H bit 7 / LCD segment driver |
| Chân 68 | RJ0 — I/O port J bit 0 / LCD segment driver |
| Chân 69 | RJ1 — I/O port J bit 1 / LCD segment driver |
| Chân 70 | RJ2 — I/O port J bit 2 / LCD segment driver |
| Chân 71 | RJ3 — I/O port J bit 3 / LCD segment driver |
| Chân 72 | RJ4 — I/O port J bit 4 / LCD segment driver |
| Chân 73 | RJ5 — I/O port J bit 5 / LCD segment driver |
| Chân 74 | RJ6 — I/O port J bit 6 / LCD segment driver |
| Chân 75 | RJ7 — I/O port J bit 7 / LCD segment driver |
| Chân 76 | AVSS — Analog ground |
| Chân 77 | AVDD — Analog positive supply |
| Chân 78 | VREF- — ADC reference low |
| Chân 79 | VREF+ — ADC reference high |
| Chân 80 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
PIC18F8493-I/PT phù hợp cho 6 Áp dụngs: Electricity Meter with LCD Display, Gas and Water Meter with LCD, Programmable Thermostat, Home Security Keypad Panel, Handheld Industrial Terminal, Medical Infusion Monitor.
Electricity Meter with LCD Display
The PIC18F8493-I/PT's integrated 192-segment LCD driver and 12-bit ADC make it ideal for single-phase and multi-phase electricity meters where display cost dominates BOM. The 12-bit ADC achieves +/-1 LSB INL for class-1 active-energy accuracy, while the 16 KB Flash holds segmented LCD bitmaps, calibration tables, and DLMS/COSEM protocol stacks. The 768-byte RAM supports running energy accumulation with 16-bit power quantities; EEPROM stores tariff schedules and metrological logs per IEC 62053-21/-22.
Được đề xuất
Gas and Water Meter with LCD
Battery-powered gas and water meters demand low quiescent current and integrated LCD, both delivered by PIC18F8493-I/PT's nanoWatt technology. Sleep currents drop into the microampere range, supporting 10+ year battery life, while the integrated LCD driver directly drives 192-segment displays without external charge-pump circuitry. The 12-bit ADC reads from pulse sensors or flow-rate transducers with adequate resolution. Internal EEPROM retains accumulated volume data across battery replacement cycles per EN 1434 / OIML R49 metering standards.
Được đề xuất
Programmable Thermostat
The PIC18F8493-I/PT fits wall-mounted thermostat designs that require an LCD for setpoint/actual temperature display, multiple temperature sensors, and relay/triac control. Its 12-bit ADC handles NTC thermistor or digital sensor inputs with 0.1C resolution suitable for HVAC control, and the PIC18F core executes PID loops within 40 MHz / 10 MIPS budget. The 80-pin TQFP exposes enough I/O for HVAC zone control, keypad scanning, and communication with companion Wi-Fi or Z-Wave modules.
Được đề xuất
Home Security Keypad Panel
The PIC18F8493-I/PT drives a 192-segment LCD showing zone status, alarm state, and event log on home security keypads. Its nanoWatt sleep modes suit always-on panels drawing microamps when idle, while the 12-bit ADC reads analog sensors (PIR, smoke, glass-break) with the dynamic range needed for security-grade detection. The 16 KB Flash holds user-code management logic and event histories; EEPROM retains installer settings across power events. CCP/PWM outputs drive piezo buzzers and indicator LEDs.
Được đề xuất
Handheld Industrial Terminal
Industrial handheld terminals benefit from the PIC18F8493-I/PT's LCD capability for displaying measurement data, equipment status, and menu navigation. The 40 MHz core executes barcode/RFID parsing, keypad debounce, and serial communication simultaneously. Its wide 2.0V-5.5V supply tolerates unregulated Li-Ion batteries, and the 12-bit ADC reads battery voltage plus analog sensors for predictive maintenance. The 80-pin TQFP is footprint-compatible with the PIC18F8490 for product-line variants.
Được đề xuất
Medical Infusion Monitor
The PIC18F8493-I/PT suits infusion pumps and patient monitors requiring a clearly readable LCD, deterministic motor-control PWM, and redundant safety interlocks. Its 12-bit ADC reads drop-rate sensors and pressure transducers at the resolution required for medical-grade infusion, while the 192-segment LCD displays flow rate, volume remaining, and alarm icons. The PIC18F core's deterministic interrupt latency supports IEC 60601-1 safety timing, and the wide VDD range accommodates battery- and mains-powered configurations.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F8493-I/PT — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC18F8490-I/PT |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Package | 80-pin TQFP (PT) | 80-pin TQFP (PT) - same |
| Core | PIC18F 8-bit | PIC18F 8-bit |
| Flash Memory | 16 KB | 8 KB (-50%) |
| RAM | 768 bytes | 768 bytes |
| ADC | 12-bit | 12-bit |
| LCD Segments | 192 | 192 |
| Max CPU Speed | 40 MHz | 40 MHz |
| Operating Voltage | 2.0V to 5.5V | 2.0V to 5.5V |
| Operating Temperature | -40C to +85C | -40C to +85C |
Bảo phân biệt quan trọng
- Doubled Flash vs PIC18F8490 (vsPIC18F8490-I/PT)
- Integrated 192-segment LCD driver (vsExternal LCD driver IC approach)
- nanoWatt power management (vsStandard PIC16F MCU)
Ghi chú thiết kế
Place a 100 nF ceramic decoupling capacitor as close as possible to each VDD/AVDD pin pair (pins 18/19/20/76/77). For ADC accuracy in metering applications, route AVDD through a ferrite bead + 10 uF bulk capacitor, and connect AVSS directly to VSS at a single point under the MCU to avoid digital-noise coupling into ADC measurements. The wide 2.0-5.5 V VDD range allows direct Li-Ion or 5 V rail operation without an LDO.
The 80-pin TQFP has 0.5 mm lead pitch requiring careful PCB layout. Use 0.2 mm/8 mil trace-and-space rules, length-matched routing on LCD segment pins (ports E/F/G/H/J), and a continuous ground plane under the MCU for thermal dissipation and EMI suppression. Keep LCD backplane and segment traces away from clock lines and ADC inputs to minimize crosstalk. Reserve a 4-layer stack-up if available for best signal integrity.
Do not leave the MCLR pin floating; tie it through a 10 kOhm pull-up to VDD with a 100 nF cap to VSS for ICSP programming. Configure unused I/O pins as outputs driven low to minimize supply current. When using the LCD driver, ensure the COM/SEG pin assignment matches the display glass pinout - mistakes here are silent and only appear as missing segments. Also, configure the FAIL-SAFE Clock Monitor before enabling interrupts to avoid CPU lock-up on oscillator failure.
Thông tin tuân thủ
RoHS and lead-free per Microchip product page. Halogen-free status not explicitly stated in retrieved data. Not AEC-Q100 qualified; for automotive applications, use AEC-Q100-qualified PIC18F variants.
