PIC18F6493-I/PT - 8-bit 40MHz 16KB Flash LCD MCU | Microchip
MPN： PIC18F6493-I/PT ✓ 啟用中PIC18F6493-I/PT 概覽
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.
直接替換替代品，適用於 PIC18F6493-I/PT — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC18F6493-I/PT （相同外形與佔位） — 差異在於 Package, Core Architecture, LCD Driver, Operating Temperature, ADC.
PIC18F6393-I/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18F8393-I/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18F6493T-I/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18F63J90-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18F6410-I/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18F6493-I/PT 最大額定值與電氣特性
| 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 |
| 工作溫度 | -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) |
| 封裝 | TQFP-64 (PT), 10x10 mm, 1.0 mm pitch |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
| Peripheral Family | PIC18F6xxx LCD series |
PIC18F6493-I/PT 腳位配置
| 腳位 1 | SEG0 — LCD segment driver output 0 |
| 腳位 2 | SEG1 — LCD segment driver output 1 |
| 腳位 3 | SEG2 — LCD segment driver output 2 |
| 腳位 4 | SEG3 — LCD segment driver output 3 |
| 腳位 5 | SEG4 — LCD segment driver output 4 |
| 腳位 6 | SEG5 — LCD segment driver output 5 |
| 腳位 7 | SEG6 — LCD segment driver output 6 |
| 腳位 8 | SEG7 — LCD segment driver output 7 |
| 腳位 9 | SEG8 — LCD segment driver output 8 |
| 腳位 10 | SEG9 — LCD segment driver output 9 |
| 腳位 11 | SEG10 — LCD segment driver output 10 |
| 腳位 12 | SEG11 — LCD segment driver output 11 |
| 腳位 13 | SEG12 — LCD segment driver output 12 |
| 腳位 14 | SEG13 — LCD segment driver output 13 |
| 腳位 15 | SEG14 — LCD segment driver output 14 |
| 腳位 16 | SEG15 — LCD segment driver output 15 |
| 腳位 17 | VDD — Positive supply voltage (4.2 V to 5.5 V) |
| 腳位 18 | VSS — Ground reference |
| 腳位 19 | OSC1/CLKIN — External clock input or crystal oscillator input |
| 腳位 20 | OSC2/CLKOUT — External clock output or crystal oscillator output |
| 腳位 21 | MCLR — Master clear (reset) input, active low |
| 腳位 22 | RA0/AN0 — Port A bit 0 / Analog input 0 |
| 腳位 23 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| 腳位 24 | RA2/AN2 — Port A bit 2 / Analog input 2 |
| 腳位 25 | RA3/AN3/VREF+ — Port A bit 3 / Analog input 3 / VREF+ |
| 腳位 26 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| 腳位 27 | RA5/AN4 — Port A bit 5 / Analog input 4 |
| 腳位 28 | RA6 — Port A bit 6 |
| 腳位 29 | RA7 — Port A bit 7 |
| 腳位 30 | VSS — Ground reference |
| 腳位 31 | VDD — Positive supply voltage (4.2 V to 5.5 V) |
| 腳位 32 | RB0/INT0 — Port B bit 0 / External interrupt 0 |
| 腳位 33 | RB1/INT1 — Port B bit 1 / External interrupt 1 |
| 腳位 34 | RB2/INT2 — Port B bit 2 / External interrupt 2 |
| 腳位 35 | RB3/INT3 — Port B bit 3 / External interrupt 3 |
| 腳位 36 | RB4 — Port B bit 4 |
| 腳位 37 | RB5 — Port B bit 5 |
| 腳位 38 | RB6/PGC — Port B bit 6 / ICSP clock |
| 腳位 39 | RB7/PGD — Port B bit 7 / ICSP data |
| 腳位 40 | RC0 — Port C bit 0 |
| 腳位 41 | RC1 — Port C bit 1 |
| 腳位 42 | RC2 — Port C bit 2 |
| 腳位 43 | RC3 — Port C bit 3 |
| 腳位 44 | RC4 — Port C bit 4 |
| 腳位 45 | RC5 — Port C bit 5 |
| 腳位 46 | RC6 — Port C bit 6 |
| 腳位 47 | RC7 — Port C bit 7 |
| 腳位 48 | RD0 — Port D bit 0 |
| 腳位 49 | RD1 — Port D bit 1 |
| 腳位 50 | RD2 — Port D bit 2 |
| 腳位 51 | RD3 — Port D bit 3 |
| 腳位 52 | RD4 — Port D bit 4 |
| 腳位 53 | RD5 — Port D bit 5 |
| 腳位 54 | RD6 — Port D bit 6 |
| 腳位 55 | RD7 — Port D bit 7 |
| 腳位 56 | SEG16 — LCD segment driver output 16 |
| 腳位 57 | SEG17 — LCD segment driver output 17 |
| 腳位 58 | SEG18 — LCD segment driver output 18 |
| 腳位 59 | SEG19 — LCD segment driver output 19 |
| 腳位 60 | SEG20 — LCD segment driver output 20 |
| 腳位 61 | SEG21 — LCD segment driver output 21 |
| 腳位 62 | SEG22 — LCD segment driver output 22 |
| 腳位 63 | SEG23 — LCD segment driver output 23 |
| 腳位 64 | VLCD — LCD supply voltage (bias generation output) |
典型應用
PIC18F6493-I/PT 適用於 7 應用s: 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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 PIC18F6493-I/PT — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | 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) |
主要差異化特點
- Highest segment LCD count in the 64-pin PIC18F6x93 family (對比PIC18F63J90-I/PT)
- More Flash memory than the lower-cost family members (對比PIC18F6393-I/PT)
- Industrial temperature range with full 5 V operation (對比PIC18F6410-I/PT)
設計說明
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.
合規資訊
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.
