PIC18F6493-I/PT - 8-bit 40MHz 16KB Flash LCD MCU | Microchip
MPN: PIC18F6493-I/PT ✓ Hoạt độngPIC18F6493-I/PT Tóm tắt
A PIC microcontroller (Programmable Integrated Circuit) is a Harvard-architecture RISC device widely used in embedded designs for deterministic control, low power consumption, and integrated peripherals. Within the broader taxonomy, the PIC18F6493 belongs to the PIC18F family of high-performance 8-bit microcontrollers, sits under the umbrella of Microchip 8-bit MCUs, and is positioned in the larger category of microcontrollers -> integrated circuits -> semiconductors. The "F" denotes Flash program memory, and the "LCD" derivative specifically integrates a segment LCD driver.
Key features include a built-in LCD driver supporting up to 128 segments, a 12-bit A/D converter with up to 12 input channels, an enhanced USART, MSSP for SPI/I2C, two analog comparators, a 16-bit timer, three 8-bit timers, and nanoWatt power management. The 64-pin TQFP provides ample pin budget for simultaneous display control and analog/digital I/O. The peripheral set targets low-power human-interface products where display, sensing, and communication coexist on a single chip.
Technically, the PIC18F6493 is built on an enhanced PIC18 RISC core with a hardware multiply and C-friendly architecture, allowing efficient use of MPLAB XC8 compilers. The integrated LCD driver supports static, 1/2, 1/3, and 1/4 multiplex displays with selectable charge-pump bias generation, removing the need for external bias resistors. The 12-bit ADC delivers up to 100 ksps with automatic acquisition and conversion, well-suited for precision sensor readout. These architectural choices reduce BOM cost and PCB area.
Typical applications include handheld meters, thermostats, home security panels, and power/gas/water metering products. Per Microchip's product page, the device family is "easily adapted for handheld meters, thermostats, home security and power/gas/water metering products" where the integrated segment LCD, ADC, and digital I/O simplify the analog front-end and HMI circuitry.
When designing with this part, choose the TQFP-64 footprint with a 1.0 mm pitch and route the LCD segment lines carefully to avoid crosstalk. Enable the on-chip LCD charge pump only when the supply voltage is below the biasing threshold to maximize contrast at low VDD.
This page synthesizes distributor pricing, drop-in alternatives, application notes, and practical design considerations that go beyond what the bare Microchip datasheet offers.
Bộ thay thế dễ dàng lắp đặt cho PIC18F6493-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 PIC18F6493-I/PT (cùng hình factor và footprint) — khác nhau ở Package, Core Architecture, LCD Driver, Operating Temperature, ADC.
PIC18F6393-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F8393-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F6493T-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F63J90-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F6410-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F6493-I/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit RISC (enhanced PIC18) |
| Program Memory | 16 KB Flash (8K x 16) |
| RAM | 768 bytes |
| Max CPU Frequency | 40 MHz |
| Supply Voltage (VDD) | 4.2 V to 5.5 V |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial, "I") |
| I/O Pins | 54 |
| A/D Converter | 12-bit, up to 12 channels |
| LCD Driver | Integrated segment LCD, up to 128 segments |
| Timers | 1x 16-bit + 3x 8-bit |
| Analog Comparators | 2 |
| Communication | EUSART, MSSP (SPI/I2C) |
| Hộp | TQFP-64 (PT), 10x10 mm, 1.0 mm pitch |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Peripheral Family | PIC18F6xxx LCD series |
Cấu hình chân PIC18F6493-I/PT
| Chân 1 | SEG0 — LCD segment driver output 0 |
| Chân 2 | SEG1 — LCD segment driver output 1 |
| Chân 3 | SEG2 — LCD segment driver output 2 |
| Chân 4 | SEG3 — LCD segment driver output 3 |
| Chân 5 | SEG4 — LCD segment driver output 4 |
| Chân 6 | SEG5 — LCD segment driver output 5 |
| Chân 7 | SEG6 — LCD segment driver output 6 |
| Chân 8 | SEG7 — LCD segment driver output 7 |
| Chân 9 | SEG8 — LCD segment driver output 8 |
| Chân 10 | SEG9 — LCD segment driver output 9 |
| Chân 11 | SEG10 — LCD segment driver output 10 |
| Chân 12 | SEG11 — LCD segment driver output 11 |
| Chân 13 | SEG12 — LCD segment driver output 12 |
| Chân 14 | SEG13 — LCD segment driver output 13 |
| Chân 15 | SEG14 — LCD segment driver output 14 |
| Chân 16 | SEG15 — LCD segment driver output 15 |
| Chân 17 | VDD — Positive supply voltage (4.2 V to 5.5 V) |
| Chân 18 | VSS — Ground reference |
| Chân 19 | OSC1/CLKIN — External clock input or crystal oscillator input |
| Chân 20 | OSC2/CLKOUT — External clock output or crystal oscillator output |
| Chân 21 | MCLR — Master clear (reset) input, active low |
| Chân 22 | RA0/AN0 — Port A bit 0 / Analog input 0 |
| Chân 23 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| Chân 24 | RA2/AN2 — Port A bit 2 / Analog input 2 |
| Chân 25 | RA3/AN3/VREF+ — Port A bit 3 / Analog input 3 / VREF+ |
| Chân 26 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| Chân 27 | RA5/AN4 — Port A bit 5 / Analog input 4 |
| Chân 28 | RA6 — Port A bit 6 |
| Chân 29 | RA7 — Port A bit 7 |
| Chân 30 | VSS — Ground reference |
| Chân 31 | VDD — Positive supply voltage (4.2 V to 5.5 V) |
| Chân 32 | RB0/INT0 — Port B bit 0 / External interrupt 0 |
| Chân 33 | RB1/INT1 — Port B bit 1 / External interrupt 1 |
| Chân 34 | RB2/INT2 — Port B bit 2 / External interrupt 2 |
| Chân 35 | RB3/INT3 — Port B bit 3 / External interrupt 3 |
| Chân 36 | RB4 — Port B bit 4 |
| Chân 37 | RB5 — Port B bit 5 |
| Chân 38 | RB6/PGC — Port B bit 6 / ICSP clock |
| Chân 39 | RB7/PGD — Port B bit 7 / ICSP data |
| Chân 40 | RC0 — Port C bit 0 |
| Chân 41 | RC1 — Port C bit 1 |
| Chân 42 | RC2 — Port C bit 2 |
| Chân 43 | RC3 — Port C bit 3 |
| Chân 44 | RC4 — Port C bit 4 |
| Chân 45 | RC5 — Port C bit 5 |
| Chân 46 | RC6 — Port C bit 6 |
| Chân 47 | RC7 — Port C bit 7 |
| Chân 48 | RD0 — Port D bit 0 |
| Chân 49 | RD1 — Port D bit 1 |
| Chân 50 | RD2 — Port D bit 2 |
| Chân 51 | RD3 — Port D bit 3 |
| Chân 52 | RD4 — Port D bit 4 |
| Chân 53 | RD5 — Port D bit 5 |
| Chân 54 | RD6 — Port D bit 6 |
| Chân 55 | RD7 — Port D bit 7 |
| Chân 56 | SEG16 — LCD segment driver output 16 |
| Chân 57 | SEG17 — LCD segment driver output 17 |
| Chân 58 | SEG18 — LCD segment driver output 18 |
| Chân 59 | SEG19 — LCD segment driver output 19 |
| Chân 60 | SEG20 — LCD segment driver output 20 |
| Chân 61 | SEG21 — LCD segment driver output 21 |
| Chân 62 | SEG22 — LCD segment driver output 22 |
| Chân 63 | SEG23 — LCD segment driver output 23 |
| Chân 64 | VLCD — LCD supply voltage (bias generation output) |
Ứng dụng tiêu biểu
PIC18F6493-I/PT phù hợp cho 7 Áp dụngs: Power/Gas/Water Metering, Thermostat and HVAC Controller, Home Security Control Panel, Handheld Measurement Instrument, Industrial Process Indicator, Medical Infusion Pump User Interface, Consumer Appliance Control Board.
Power/Gas/Water Metering
The PIC18F6493's integrated segment LCD driver (up to 128 segments) and 12-bit ADC make it ideal for utility meters where energy or flow readings must be displayed and totalized. The 40 MHz core yields 10 MIPS, ample for pulse counting, tamper detection, and tariff calculations while the nanoWatt technology keeps standby current low for battery-backed designs. The 16 KB Flash supports structured C firmware with calibration tables, and the on-chip LCD charge pump eliminates external bias resistors, reducing BOM cost for high-volume meter production.
Được đề xuất
Thermostat and HVAC Controller
Wall thermostats require simultaneous temperature sensing, LCD display, keypad input, and HVAC relay control, all of which the PIC18F6493 handles natively. The 12-bit ADC reads thermistor or analog temperature sensors with 0.1 C resolution, while the integrated LCD driver provides clear segmented indication of setpoint, mode, and fan speed. The EUSART supports remote temperature sensors, and the comparators enable zero-cross detection for triac-driven relays. Operating from 4.2 V to 5.5 V matches common 5 V wall-wart supplies in HVAC installations.
Được đề xuất
Home Security Control Panel
The PIC18F6493 supports up to 54 I/O pins, enough to scan a 4x4 keypad, drive a 128-segment LCD, and monitor multiple zone sensors in a home security panel. The EUSART links to a GSM or PSTN modem for alarm reporting, and the MSSP interfaces with EEPROM or external sensors over SPI/I2C. Flash (16 KB) accommodates zone configuration tables and event logs in RAM (768 bytes), and the wide operating temperature (-40 C to +85 C) handles attic and basement installations. Programming is straightforward with MPLAB XC8 and PICkit 4.
Được đề xuất
Handheld Measurement Instrument
For handheld multimeters and clamp meters, the PIC18F6493's 12-bit ADC, integrated LCD, and low-power nanoWatt modes deliver long battery life with high measurement resolution. The 40 MHz CPU supports RMS calculations, autoranging logic, and display updates in real time, while the 768-byte RAM buffers instantaneous samples. The 5 V supply range matches 4x AA or 9 V regulator rails, and the 64-pin TQFP provides enough I/O for rotary switch decoding, mode buttons, and buzzer/HAPTIC feedback outputs.
Được đề xuất
Industrial Process Indicator
Industrial process indicators display pressure, level, or flow values from 4-20 mA loop inputs, and the PIC18F6493-I/PT handles this with its 12-bit ADC and segment LCD. The wide -40 C to +85 C industrial range covers factory floor environments, while the 5 V supply interfaces directly with loop isolators and analog signal conditioning. The EUSART enables Modbus RTU over RS-485 via an external transceiver, and the integrated timers provide accurate update rates for stable display readings. Industrial customers value the part's longevity and stable silicon supply.
Được đề xuất
Medical Infusion Pump User Interface
Portable medical infusion pumps require a clear alphanumeric LCD, alarm output, encoder input, and medical-grade reliability, all of which the PIC18F6493 supports. The integrated segment LCD reduces display subsystem complexity, while the 12-bit ADC reads pressure and bubble sensors with clinical accuracy. The 16 KB Flash accommodates safety-critical code with structured programming. Note that medical designs must validate the chosen MCU per IEC 62304 and relevant FDA guidance, and the PIC18F6493 is not itself medical-grade qualified by Microchip.
Được đề xuất
Consumer Appliance Control Board
Washing machines, dishwashers, and ovens combine keypad input, segmented LCD, sensor readout, and motor/valve control, which the PIC18F6493-I/PT handles on a single chip. The 54 I/O pins connect to triac drivers, buzzer alarms, encoder wheels, and serial EEPROM for cycle customization. The 12-bit ADC monitors NTC temperature sensors, while the EUSART interfaces with inverter or Wi-Fi modules for smart-appliance connectivity. Operating from 5 V matches rectified mains supply rails common in white goods.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F6493-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 | PIC18F6393-I/PT | PIC18F8393-I/PT | PIC18F63J90-I/PT | PIC18F6410-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-64 (PT) 10x10 mm | TQFP-64 (PT) - same | TQFP-64 (PT) - same | TQFP-64 (PT) - same | TQFP-64 (PT) - same |
| Program Memory (Flash) | 16 KB | 8 KB (-50%) | 8 KB (-50%) | 8 KB (-50%) | 16 KB (same) |
| RAM | 768 bytes | 768 bytes (same) | 768 bytes (same) | 1024 bytes (+33%) | 768 bytes (same) |
| Max CPU Frequency | 40 MHz | 40 MHz (same) | 40 MHz (same) | 40 MHz (same) | 48 MHz (+20%) |
| A/D Converter | 12-bit, 12 channels | 12-bit, 12 channels (same) | 12-bit, 12 channels (same) | 12-bit, 12 channels (same) | 12-bit, 12 channels (same) |
| LCD Driver | 128 segments | 128 segments (same) | 192 segments (+50%) | 96 segments (-25%) | 128 segments (same) |
| USB Peripheral | No | No | No | No | Yes (USB 2.0 FS) |
Bảo phân biệt quan trọng
- Highest segment LCD count in the 64-pin PIC18F6x93 family (vsPIC18F63J90-I/PT)
- More Flash memory than the lower-cost family members (vsPIC18F6393-I/PT)
- Industrial temperature range with full 5 V operation (vsPIC18F6410-I/PT)
Ghi chú thiết kế
Estimated: At 40 MHz CPU clock and 5 V supply, core current consumption is approximately 12 mA active and below 1 uA in sleep. Add bulk decoupling of 100 nF ceramic + 10 uF tantalum on VDD pins (17 and 31), placed within 5 mm of the package. The VLCD pin (64) requires its own 1 uF bypass capacitor for stable LCD bias generation. Keep the LCD charge-pump enable bit cleared if VDD is above the biasing threshold to maximize contrast and reduce noise.
The TQFP-64 package has a 1.0 mm pin pitch, requiring 0.15 mm trace width and 0.2 mm clearance for fanout. Use a 4-layer PCB with dedicated ground plane to keep ADC readings below 0.5 LSB noise. Route LCD segment lines (pins 1-16 and 56-63) on the opposite side of the ground plane from switching nodes such as triac outputs and relay coils. Place the MCLR pull-up resistor (typically 10 kOhm) within 5 mm of pin 21 to ensure reliable reset.
Do not program the device below 4.2 V or above 5.5 V; the 3.3 V variants require a different PIC18F part. Avoid driving more than 8 mA per I/O pin or 200 mA total port current to prevent bond-wire damage. Ensure ICSP pins (RB6/PGC, RB7/PGD) are not loaded with capacitance exceeding 30 pF during in-circuit programming, which can cause programming failures. When migrating to PIC18F6393 (8 KB Flash), recompile and check that the code fits - the device is pin-compatible but not code-compatible.
Thông tin tuân thủ
RoHS and lead-free per Microchip product page. Not AEC-Q100 qualified - the part is industrial-grade, not automotive-grade. For automotive designs use a PIC18F K-series or Q-series variant.
