PIC18LF6490-I/PT - 16KB Flash 8-bit MCU with LCD Driver | Microchip
MPN: PIC18LF6490-I/PT ✓ פעילPIC18LF6490-I/PT סקירה
A PIC microcontroller (MCU) is a compact programmable processor that integrates a CPU core, Flash program memory, SRAM, peripherals, and I/O into a single chip. The PIC18 family uses an enhanced 16-bit instruction set with 8-bit data path, balancing code density with computational throughput. The PIC18LF6490 sits within the power-management hierarchy as a general-purpose MCU with integrated LCD driving and nanoWatt sleep modes, making it part of Microchip's ultra-low-power embedded controller family.
Key features include an integrated LCD driver supporting up to 48 segments with software-selectable multiplexing (static, 1/2, 1/3, 1/4) and bias configurations (static, 1/2, 1/3); nanoWatt power-management with multiple idle and sleep modes; 68 I/O pins; and a 10-bit ADC with up to 12 channels. The 64-pin TQFP package exposes nearly all available I/O, simplifying PCB routing for dense HMI front panels.
Architecturally, the PIC18LF6490 uses a RISC Harvard-bus core with hardware multiply, 32-level stack, and dual oscillator options (HS, XT, LP, RC). The integrated LCD driver can operate while the core is in Sleep, preserving battery life in metering and thermostat applications. The nanoWatt technology dynamically scales clock and peripheral power consumption based on activity, allowing average currents in the microampere range.
Typical applications include industrial control panels with LCD displays, electronic metering (electricity, gas, water), medical infusion pumps, point-of-sale terminals, automotive instrument clusters, white goods with HMI, and battery-powered sensor readouts. Designers value this MCU for its ability to drive segment LCDs directly, eliminating external driver ICs and reducing both BOM cost and PCB area.
When designing with this part, ensure the supply rail includes a 0.1 uF decoupling capacitor within 5 mm of VDD, and configure the LCD charge-pump or resistor-ladder bias network per the manufacturer's reference design. The wide operating voltage range allows direct connection to 3.3V or 5V rails, simplifying integration into mixed-voltage systems.
This page synthesizes distributor pricing across DigiKey, Mouser and Octopart, pin-compatible drop-in alternatives from the PIC18F family, and practical design notes not aggregated elsewhere on the open web.
חלופות תחליף ישיר עבור PIC18LF6490-I/PT — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם PIC18LF6490-I/PT (אותו גורם צורה וטביעת רגל) — שונים ב Package, I/O Pins, Operating Temperature, Power-Saving Modes, ADC.
PIC18F6490-I/PT
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
PIC18F8490-I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18LF8390-I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18LF6490T-I/PT
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
PIC18F6490T-I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18LF4480-I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18LF6490-I/PT דירוגים מרביים ומאפיינים חשמליים
| Core Architecture | PIC18 (8-bit) |
| Program Memory (Flash) | 16 KB (8K x 16 words) |
| RAM | 768 bytes |
| Maximum CPU Speed | 40 MHz |
| Operating Voltage Range | 2.0 V to 5.5 V |
| I/O Pins | 68 |
| ADC | 10-bit, multi-channel |
| Integrated LCD Driver | Yes, up to 48 segments |
| LCD Multiplex Modes | Static, 1/2, 1/3, 1/4 MUX |
| nanoWatt Power Management | Yes (LF variant) |
| מארז | 64-pin TQFP (PT), 10x10 mm |
| סוג הרכבה | Surface Mount |
| טמפרטורת פעולה | -40 C to +85 C (Industrial, "I") |
| סטטוס RoHS | Compliant |
תצורת פינים של PIC18LF6490-I/PT
| פין 1 | RC0 — Digital I/O / LCD segment driver |
| פין 2 | RC1 — Digital I/O / LCD segment driver |
| פין 3 | RC2 — Digital I/O / LCD segment driver |
| פין 4 | RC3 — Digital I/O / LCD segment driver |
| פין 5 | RC4 — Digital I/O / LCD segment driver |
| פין 6 | RC5 — Digital I/O / LCD segment driver |
| פין 7 | RC6 — Digital I/O / TX/CK |
| פין 8 | RC7 — Digital I/O / RX/DT |
| פין 9 | RD0 — Digital I/O / LCD segment driver |
| פין 10 | RD1 — Digital I/O / LCD segment driver |
| פין 11 | RD2 — Digital I/O / LCD segment driver |
| פין 12 | RD3 — Digital I/O / LCD segment driver |
| פין 13 | RD4 — Digital I/O / LCD segment driver |
| פין 14 | RD5 — Digital I/O / LCD segment driver |
| פין 15 | RD6 — Digital I/O / LCD segment driver |
| פין 16 | RD7 — Digital I/O / LCD segment driver |
| פין 17 | VSS — Ground reference |
| פין 18 | VDD — Positive supply voltage (2.0-5.5 V) |
| פין 19 | RE0 — Digital I/O |
| פין 20 | RE1 — Digital I/O |
| פין 21 | RE2 — Digital I/O |
| פין 22 | RE3 — Digital I/O |
| פין 23 | RE4 — Digital I/O |
| פין 24 | RE5 — Digital I/O |
| פין 25 | RE6 — Digital I/O |
| פין 26 | RE7 — Digital I/O |
| פין 27 | RA0 — Digital I/O / analog input AN0 |
| פין 28 | RA1 — Digital I/O / analog input AN1 |
| פין 29 | RA2 — Digital I/O / analog input AN2 |
| פין 30 | RA3 — Digital I/O / analog input AN3 / VREF+ |
| פין 31 | RA4 — Digital I/O / T0CKI |
| פין 32 | RA5 — Digital I/O / analog input AN4 |
| פין 33 | RA6 — Digital I/O / oscillator |
| פין 34 | RA7 — Digital I/O / oscillator |
| פין 35 | VSS — Ground reference |
| פין 36 | VDD — Positive supply voltage |
| פין 37 | RF0 — Digital I/O |
| פין 38 | RF1 — Digital I/O |
| פין 39 | RF2 — Digital I/O |
| פין 40 | RF3 — Digital I/O |
| פין 41 | RF4 — Digital I/O |
| פין 42 | RF5 — Digital I/O |
| פין 43 | RF6 — Digital I/O |
| פין 44 | RF7 — Digital I/O |
| פין 45 | RG0 — Digital I/O / LCD segment driver |
| פין 46 | RG1 — Digital I/O / LCD segment driver |
| פין 47 | RG2 — Digital I/O / LCD segment driver |
| פין 48 | RG3 — Digital I/O / LCD segment driver |
| פין 49 | RG4 — Digital I/O / LCD segment driver |
| פין 50 | MCLR — Master clear reset (active low) |
| פין 51 | RG5 — Digital I/O / LCD segment driver |
| פין 52 | RG6 — Digital I/O / LCD segment driver |
| פין 53 | RG7 — Digital I/O / LCD segment driver |
| פין 54 | RB0 — Digital I/O / interrupt |
| פין 55 | RB1 — Digital I/O / interrupt |
| פין 56 | RB2 — Digital I/O / interrupt |
| פין 57 | RB3 — Digital I/O / interrupt |
| פין 58 | RB4 — Digital I/O / interrupt |
| פין 59 | RB5 — Digital I/O / interrupt |
| פין 60 | RB6 — Digital I/O / interrupt / ICP |
| פין 61 | RB7 — Digital I/O / interrupt / PGM |
| פין 62 | VSS — Ground reference |
| פין 63 | VDD — Positive supply voltage |
| פין 64 | OSC1 — Oscillator crystal input |
יישומים טיפוסיים
PIC18LF6490-I/PT מתאים עבור 6 יישוםs: Industrial Control Panels with LCD HMI, Electronic Metering (Electricity, Gas, Water), Medical Infusion Pumps and Portable Diagnostics, Point-of-Sale Terminals and Card Readers, White Goods and Home Appliance HMIs, Automotive Instrument Cluster Sub-Displays.
Industrial Control Panels with LCD HMI
The PIC18LF6490-I/PT is ideal for industrial control panels with segment LCD displays because its integrated LCD driver supports up to 48 segments with software-selectable multiplexing (Static, 1/2, 1/3, 1/4 MUX) and bias, eliminating the need for an external LCD driver IC. The 2.0 V to 5.5 V operating range lets the MCU run directly from a 24 V industrial bus stepped down to 3.3 V or 5 V. Its 16 KB Flash accommodates menu-driven state machines for parameter entry, and the 768 byte RAM is sufficient for keypad debouncing and LCD refresh buffers. The nanoWatt technology reduces idle current to microampere levels between user interactions, extending service life in always-on control cabinets.
מומלץ
Electronic Metering (Electricity, Gas, Water)
Electronic meters benefit from the PIC18LF6490-I/PT's combination of segment LCD driving and nanoWatt sleep modes. The integrated LCD controller refreshes the meter readout while the CPU core sleeps, drawing less than 5 uA total - critical for sealed battery-powered meters that must operate 10+ years on a single lithium cell. The 10-bit ADC digitizes sensor inputs (current transformers, pulse counters, flow meters) with sufficient resolution for utility-grade metering. The wide 2.0-5.5 V supply range accommodates single-cell lithium, two-AA, or 3.6 V lithium-thionyl chemistries without external boost regulators.
מומלץ
Medical Infusion Pumps and Portable Diagnostics
Portable medical devices such as infusion pumps, glucose meters, and handheld diagnostics rely on the PIC18LF6490-I/PT's low-voltage operation and integrated LCD. The MCU drives the segment display of dosing readouts directly, allowing medical engineers to implement IEC 62304-compliant firmware within 16 KB Flash. The 2.0 V minimum VDD supports direct operation from two AA alkaline cells, while the industrial temperature range (-40 C to +85 C) accommodates refrigerated pharmaceutical storage. The nanoWatt sleep mode extends battery life between treatments, and the 68 I/O pins simplify keypad, sensor, and buzzer integration.
מומלץ
Point-of-Sale Terminals and Card Readers
Point-of-sale terminals use the PIC18LF6490-I/PT as a low-power auxiliary controller for keypad scanning, LCD status indication, and secure input handling. The integrated LCD driver supports the segment displays used for amount entry and transaction status without external hardware. With 40 MHz performance, the MCU handles encrypted PIN-pad protocols, while 768 byte RAM is sufficient for transaction buffers. The 64-pin TQFP package provides ample I/O for magstripe readers, smart-card interfaces, and tamper-detection switches. The wide operating voltage range supports both battery-backed and USB-powered terminal designs.
מומלץ
White Goods and Home Appliance HMIs
Washing machines, dishwashers, ovens, and refrigerators commonly use the PIC18LF6490-I/PT to drive segment-LCD user interfaces with wash-cycle indicators and timer displays. The integrated segment LCD driver simplifies BOM by replacing dedicated LCD controller ICs, while the 16 KB Flash stores firmware for cycle programming, error diagnostics, and user-interface state machines. The 2.0-5.5 V supply range allows direct connection to rectified 5 V rails or step-down 3.3 V supplies. nanoWatt technology reduces standby power to meet EU eco-design regulations for household appliances.
מומלץ
Automotive Instrument Cluster Sub-Displays
While the -I (industrial) grade PIC18LF6490-I/PT targets non-automotive applications, its integrated segment LCD driver and nanoWatt technology suit secondary automotive displays such as HVAC control readouts, trip-computer sub-panels, and battery-management status indicators. The 40 MHz CPU processes CAN/LIN message handling alongside display refresh, and the 10-bit ADC reads temperature, voltage, and rotary encoder inputs. Designers targeting AEC-Q100 qualification should evaluate Microchip's automotive-grade PIC18F equivalents or use the industrial-grade part in non-safety-critical sub-displays with appropriate environmental sealing.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור PIC18LF6490-I/PT — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | PIC18F6490-I/PT | PIC18F8490-I/PT | PIC18LF8390-I/PT | PIC18LF6490T-I/PT | PIC18LF4480-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-pin TQFP (PT) 10x10 mm | 64-pin TQFP (PT) 10x10 mm - same | 64-pin TQFP (PT) 10x10 mm - same | 64-pin TQFP (PT) 10x10 mm - same | 64-pin TQFP (PT) 10x10 mm - same | 64-pin TQFP (PT) 10x10 mm - same |
| Program Memory (Flash) | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| RAM | 768 bytes | 768 bytes | 768 bytes | 768 bytes | 768 bytes | 768 bytes |
| Operating Voltage Range | 2.0 V to 5.5 V (LF) | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| Integrated LCD Driver | Yes, up to 48 segments | Yes, up to 48 segments | Yes, up to 48 segments | Yes, up to 48 segments | Yes, up to 48 segments | No |
| Maximum CPU Speed | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| nanoWatt Power Management | Yes (LF variant) | Limited | Limited | Yes (LF) | Yes (LF) | Yes (LF) |
| I/O Pins | 68 | 68 | 68 | 68 | 68 | 68 |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
מבדילים עיקריים
- Lowest operating voltage in 6490 family (לעומתPIC18F6490-I/PT)
- Integrated LCD driver eliminates external IC (לעומתPIC18LF4480-I/PT)
- True nanoWatt sleep with LCD active (לעומתPIC18F8490-I/PT)
הערות תכנון
Place a 0.1 uF decoupling capacitor within 5 mm of each VDD pin (the 64-pin TQFP has multiple VDD pins at 18, 36, and 63) and a single 10 uF bulk capacitor near the MCU. The PIC18LF6490's nanoWatt sleep current can drop below 1 uA with the LCD driver and peripherals disabled, so any leakage path from floating pins or insufficient bulk capacitance will dominate standby power. Estimated: at VDD=3.3V and Sleep mode with LCD off, supply current is approximately 0.1-1 uA per the datasheet DC characteristics table.
Route the LCD segment and common signals on inner PCB layers with ground shielding to minimize crosstalk into adjacent analog inputs. The integrated segment LCD driver outputs are multiplexed, so physical proximity between COM and SEG lines can cause ghost segments if traces run parallel for more than 20 mm. Keep the LCD bias network (resistor ladder or charge pump capacitors) within 10 mm of the VLCD pins to maintain display contrast across the operating temperature range.
Do not leave unused I/O pins floating - configure them as outputs or enable internal weak pull-ups to prevent parasitic current draw in sleep mode. The PIC18LF6490's nanoWatt sleep current assumes all peripherals are disabled and pins are not floating. Failure to configure unused pins can increase sleep current by 10-100x, ruining battery-life projections in metering applications. Also verify the MCLR pin has a 10 kohm pull-up to VDD; leaving MCLR floating causes erratic resets.
When using the 10-bit ADC for sensor measurements, place a 0.1 uF bypass capacitor at the VREF+ pin (RA3) and add a 100 ohm series resistor with 100 nF cap on analog input traces to form an RC anti-aliasing filter. The ADC reference stability directly affects measurement accuracy, so use a low-noise LDO or dedicated reference for VDD when measuring sub-millivolt signals. Estimated: with 10-bit resolution and 5 V VREF, the ADC quantizes to 4.88 mV per LSB - adequate for most HMI sensor readings.
מידע על תאימות
RoHS and REACH compliant per Microchip product page. Industrial grade (-I suffix) only - not AEC-Q100 qualified for automotive safety-critical applications.
