PIC18F8493-I/PT - 16KB Flash LCD MCU 12-bit ADC | Microchip
N.º de pieza: PIC18F8493-I/PT ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $8.95 | $8,95 |
| 10 | $8.05 | $80,50 |
| 100 | $7.15 | $715,00 |
| 500 | $6.35 | $3.175,00 |
| 1.000 | $5.65 | $5.650,00 |
PIC18F8493-I/PT Descripción general
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.
Alternativas directas para PIC18F8493-I/PT — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con PIC18F8493-I/PT (mismo factor de forma y huella) — difiere en Package, ADC, LCD Driver, Core, MSL Level.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
PIC18F8490-I/PT
✅ Sustitución directa✓ En stock
$5.55 / unidad
Ver hoja de datos →PIC18F8493-I/PT
✅ Sustitución directa✓ En stock
$5.65 / unidad
Ver hoja de datos →PIC18F8493-I/PT Valores máximos y características eléctricas
| 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 |
| Encapsulado | 80-pin TQFP (PT) |
| Temperatura de funcionamiento | -40C to +85C (Industrial) |
| Tipo de montaje | Surface Mount |
| Nivel MSL | 3 (per JEDEC J-STD-020) |
| Estado RoHS | Compliant |
| Lead-Free | Yes |
| Peripherals | CCP, USART, SPI, I2C, 10-bit DAC ref |
| Power Technology | nanoWatt |
Configuración de pines de PIC18F8493-I/PT
| Pin 1 | RC0 — I/O port C bit 0 / digital I/O |
| Pin 2 | RC1 — I/O port C bit 1 / digital I/O |
| Pin 3 | RC2 — I/O port C bit 2 / digital I/O |
| Pin 4 | RC3 — I/O port C bit 3 / digital I/O |
| Pin 5 | RC4 — I/O port C bit 4 / digital I/O |
| Pin 6 | RC5 — I/O port C bit 5 / digital I/O |
| Pin 7 | RC6 — I/O port C bit 6 / TX1 |
| Pin 8 | RC7 — I/O port C bit 7 / RX1 |
| Pin 9 | RD0 — I/O port D bit 0 / PSP |
| Pin 10 | RD1 — I/O port D bit 1 / PSP |
| Pin 11 | RD2 — I/O port D bit 2 / PSP |
| Pin 12 | RD3 — I/O port D bit 3 / PSP |
| Pin 13 | RD4 — I/O port D bit 4 / PSP |
| Pin 14 | RD5 — I/O port D bit 5 / PSP |
| Pin 15 | RD6 — I/O port D bit 6 / PSP |
| Pin 16 | RD7 — I/O port D bit 7 / PSP |
| Pin 17 | VSS1 — Ground |
| Pin 18 | VDD1 — Positive supply (2.0V-5.5V) |
| Pin 19 | VSS2 — Ground |
| Pin 20 | VDD2 — Positive supply (2.0V-5.5V) |
| Pin 21 | RB0 — I/O port B bit 0 / INT0 |
| Pin 22 | RB1 — I/O port B bit 1 / INT1 |
| Pin 23 | RB2 — I/O port B bit 2 / INT2 |
| Pin 24 | RB3 — I/O port B bit 3 / CCP2 |
| Pin 25 | RB4 — I/O port B bit 4 |
| Pin 26 | RB5 — I/O port B bit 5 |
| Pin 27 | RB6 — I/O port B bit 6 / PGC (ICSP clock) |
| Pin 28 | RB7 — I/O port B bit 7 / PGD (ICSP data) |
| Pin 29 | MCLR — Master Clear (reset) input |
| Pin 30 | RA0 — I/O port A bit 0 / AN0 |
| Pin 31 | RA1 — I/O port A bit 1 / AN1 |
| Pin 32 | RA2 — I/O port A bit 2 / AN2 |
| Pin 33 | RA3 — I/O port A bit 3 / AN3 / VREF+ |
| Pin 34 | RA4 — I/O port A bit 4 / T0CKI |
| Pin 35 | RA5 — I/O port A bit 5 / AN4 |
| Pin 36 | RE0 — I/O port E bit 0 / LCD segment driver |
| Pin 37 | RE1 — I/O port E bit 1 / LCD segment driver |
| Pin 38 | RE2 — I/O port E bit 2 / LCD segment driver |
| Pin 39 | RE3 — I/O port E bit 3 / LCD segment driver |
| Pin 40 | RE4 — I/O port E bit 4 / LCD segment driver |
| Pin 41 | RE5 — I/O port E bit 5 / LCD segment driver |
| Pin 42 | RE6 — I/O port E bit 6 / LCD segment driver |
| Pin 43 | RE7 — I/O port E bit 7 / LCD segment driver |
| Pin 44 | RF0 — I/O port F bit 0 / LCD segment driver |
| Pin 45 | RF1 — I/O port F bit 1 / LCD segment driver |
| Pin 46 | RF2 — I/O port F bit 2 / LCD segment driver |
| Pin 47 | RF3 — I/O port F bit 3 / LCD segment driver |
| Pin 48 | RF4 — I/O port F bit 4 / LCD segment driver |
| Pin 49 | RF5 — I/O port F bit 5 / LCD segment driver |
| Pin 50 | RF6 — I/O port F bit 6 / LCD segment driver |
| Pin 51 | RF7 — I/O port F bit 7 / LCD segment driver |
| Pin 52 | RG0 — I/O port G bit 0 / LCD segment driver |
| Pin 53 | RG1 — I/O port G bit 1 / LCD segment driver |
| Pin 54 | RG2 — I/O port G bit 2 / LCD segment driver |
| Pin 55 | RG3 — I/O port G bit 3 / LCD segment driver |
| Pin 56 | RG4 — I/O port G bit 4 / LCD segment driver |
| Pin 57 | RG5 — I/O port G bit 5 / LCD segment driver |
| Pin 58 | RG6 — I/O port G bit 6 / LCD segment driver |
| Pin 59 | RG7 — I/O port G bit 7 / LCD segment driver |
| Pin 60 | RH0 — I/O port H bit 0 / LCD segment driver |
| Pin 61 | RH1 — I/O port H bit 1 / LCD segment driver |
| Pin 62 | RH2 — I/O port H bit 2 / LCD segment driver |
| Pin 63 | RH3 — I/O port H bit 3 / LCD segment driver |
| Pin 64 | RH4 — I/O port H bit 4 / LCD segment driver |
| Pin 65 | RH5 — I/O port H bit 5 / LCD segment driver |
| Pin 66 | RH6 — I/O port H bit 6 / LCD segment driver |
| Pin 67 | RH7 — I/O port H bit 7 / LCD segment driver |
| Pin 68 | RJ0 — I/O port J bit 0 / LCD segment driver |
| Pin 69 | RJ1 — I/O port J bit 1 / LCD segment driver |
| Pin 70 | RJ2 — I/O port J bit 2 / LCD segment driver |
| Pin 71 | RJ3 — I/O port J bit 3 / LCD segment driver |
| Pin 72 | RJ4 — I/O port J bit 4 / LCD segment driver |
| Pin 73 | RJ5 — I/O port J bit 5 / LCD segment driver |
| Pin 74 | RJ6 — I/O port J bit 6 / LCD segment driver |
| Pin 75 | RJ7 — I/O port J bit 7 / LCD segment driver |
| Pin 76 | AVSS — Analog ground |
| Pin 77 | AVDD — Analog positive supply |
| Pin 78 | VREF- — ADC reference low |
| Pin 79 | VREF+ — ADC reference high |
| Pin 80 | NC — Not connected (per datasheet) |
Aplicaciones típicas
PIC18F8493-I/PT es adecuado para 6 aplicacións: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para PIC18F8493-I/PT — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | 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 |
Diferenciadores clave
- Doubled Flash vs PIC18F8490 (frente a PIC18F8490-I/PT)
- Integrated 192-segment LCD driver (frente a External LCD driver IC approach)
- nanoWatt power management (frente a Standard PIC16F MCU)
Notas de diseño
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.
Información de cumplimiento
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.
