PIC18LF4523-I/P - 8-bit 40MHz 32KB Flash MCU | Microchip | DIP-40
Référence : PIC18LF4523-I/P ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $8.08 | $8,08 |
| 10 | $7.27 | $72,70 |
| 100 | $5.96 | $596,00 |
| 500 | $5.05 | $2 525,00 |
| 1 000 | $4.32 | $4 320,00 |
PIC18LF4523-I/P Présentation
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, Flash program memory, and peripherals such as timers, ADC, and communication interfaces onto one silicon die. Within the Microchip hierarchy, the PIC18F/LF family sits above the PIC16 baseline and enhanced cores and below the PIC24/dsPIC 16-bit families, providing a balance of processing throughput, peripheral richness, and code density that has made it the workhorse of industrial embedded designs.
Key features of the PIC18LF4523-I/P include 32 KB Flash, 1536 bytes of RAM, 256 bytes of EEPROM, a 12-channel 10-bit ADC, two analog comparators, four 16-bit timers, two capture/compare/PWM (ECCP) modules, MSSP (SPI/I2C), enhanced USART, and two comparators with a reference. The 36 digital I/O pins are 5 V tolerant on the digital inputs when VDD is present, supporting direct interfacing to legacy 5 V logic. The RISC architecture delivers 10 MIPS at 40 MHz, with a hardware multiplier and C-friendly instruction set.
Typical applications include industrial control panels, sensor signal conditioning front-ends, motor-drive companion controllers, USB-to-UART bridges (via MSSP + USART), HVAC thermostats, low-cost instrumentation, and educational/development boards. The wide 2.0-5.5 V operating range allows the same firmware to run from a Li-ion cell or a regulated 5 V rail.
When laying out a board, provide at least 100 nF decoupling on each VDD/AVDD pair close to the pins, route the 40 MHz crystal traces symmetrically with a guard ring, and reserve MCLR with a 10 kohm pull-up plus an inline resistor for in-circuit serial programming (ICSP).
This page synthesizes distributor pricing, drop-in alternative MPNs, and practical design notes not found in the manufacturer datasheet alone, helping engineers select and qualify the PIC18LF4523-I/P for new designs and legacy maintenance.
Alternatives de remplacement direct pour PIC18LF4523-I/P — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec PIC18LF4523-I/P (même facteur de forme et même empreinte) — différant par Package, Timers, ADC, Core, Mounting Type.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC18LF4523-I/ML
✅ Remplacement direct✓ En stock
$4.12 / unité
Voir la fiche technique →PIC18LF4523T-I/PT
✅ Remplacement direct✓ En stock
$4.3 / unité
Voir la fiche technique →PIC18F4523-I/P
✅ Remplacement direct✓ En stock
$2.82 / unité
Voir la fiche technique →PIC18LF4520-I/PT
✅ Remplacement direct✓ En stock
$5.21 / unité
Voir la fiche technique →PIC18F4520-I/P
✅ Remplacement direct✓ En stock
$5.35 / unité
Voir la fiche technique →PIC18LF4420-I/P
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC18LF4523-I/P Valeurs maximales et caractéristiques électriques
| Core | PIC18 (8-bit RISC) |
| CPU Speed | 40 MHz (10 MIPS) |
| Program Memory (Flash) | 32 KB (16K x 16) |
| RAM | 1536 bytes |
| EEPROM | 256 bytes |
| Operating Voltage (VDD) | 2.0 V to 5.5 V |
| I/O Pins | 36 |
| ADC | 12-channel, 10-bit |
| Analog Comparators | 2 |
| Timers (16-bit) | 4 |
| ECCP/PWM Modules | 2 |
| MSSP (SPI / I2C) | 1 |
| EUSART | 1 |
| Boîtier | 40-pin PDIP (0.600") |
| Température de fonctionnement | -40C to +85C (Industrial) |
| Type de montage | Through Hole |
| Niveau MSL | 1 (unlimited) |
| Statut RoHS | Compliant |
Configuration des broches de PIC18LF4523-I/P
| Broche 1 | MCLR — Master Clear (Reset) input, active low |
| Broche 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Broche 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Broche 4 | RA2/AN2/VREF- — PORTA bit 2 / Analog input 2 / VREF- |
| Broche 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / VREF+ |
| Broche 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Broche 7 | RA5/AN4 — PORTA bit 5 / Analog input 4 |
| Broche 8 | RE0/RD — PORTE bit 0 / Read control |
| Broche 9 | RE1/WR — PORTE bit 1 / Write control |
| Broche 10 | RE2/CS — PORTE bit 2 / Chip select |
| Broche 11 | VDD — Positive supply voltage |
| Broche 12 | VSS — Ground |
| Broche 13 | OSC1/CLKI — Crystal oscillator input / external clock |
| Broche 14 | OSC2/CLKO — Crystal oscillator output |
| Broche 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator |
| Broche 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / CCP2 I/O |
| Broche 17 | RC2/CCP1 — PORTC bit 2 / CCP1 I/O |
| Broche 18 | RC3/SCK/SCL — PORTC bit 3 / MSSP SPI clock / I2C clock |
| Broche 19 | RD0/PSP0 — PORTD bit 0 / Parallel slave port |
| Broche 20 | RD1/PSP1 — PORTD bit 1 / Parallel slave port |
| Broche 21 | RD2/PSP2 — PORTD bit 2 / Parallel slave port |
| Broche 22 | RD3/PSP3 — PORTD bit 3 / Parallel slave port |
| Broche 23 | RC4/SDI/SDA — PORTC bit 4 / MSSP SPI data in / I2C data |
| Broche 24 | RC5/SDO — PORTC bit 5 / MSSP SPI data out |
| Broche 25 | RC6/TX/CK — PORTC bit 6 / EUSART TX / clock |
| Broche 26 | RC7/RX/DT — PORTC bit 7 / EUSART RX / data |
| Broche 27 | RD4/PSP4 — PORTD bit 4 / Parallel slave port |
| Broche 28 | RD5/PSP5 — PORTD bit 5 / Parallel slave port |
| Broche 29 | RD6/PSP6 — PORTD bit 6 / Parallel slave port |
| Broche 30 | RD7/PSP7 — PORTD bit 7 / Parallel slave port |
| Broche 31 | VSS — Ground |
| Broche 32 | VDD — Positive supply voltage |
| Broche 33 | RB0/INT0 — PORTB bit 0 / External interrupt 0 |
| Broche 34 | RB1/INT1 — PORTB bit 1 / External interrupt 1 |
| Broche 35 | RB2/INT2 — PORTB bit 2 / External interrupt 2 |
| Broche 36 | RB3/CCP2 — PORTB bit 3 / CCP2 alternate |
| Broche 37 | RB4 — PORTB bit 4 (interrupt-on-change) |
| Broche 38 | RB5 — PORTB bit 5 (interrupt-on-change) |
| Broche 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Broche 40 | RB7/PGD — PORTB bit 7 / ICSP data |
Applications typiques
PIC18LF4523-I/P convient pour 6 applications: Industrial Control Panels, Battery-Powered Sensor Hubs, Motor Drive Companion Controller, USB-to-UART Bridge Firmware, HVAC Thermostat Controllers, Educational & Development Boards.
Industrial Control Panels
The PIC18LF4523-I/P's 36 I/O pins and 40 MHz CPU deliver responsive panel logic for PLCs and operator interfaces. With 32 KB Flash and 1.5 KB RAM, the part hosts Modbus RTU slave stacks over EUSART plus HMI key-scan routines on PORTB without external memory. The 2.0-5.5 V range lets the panel share a 24 V-to-5 V back-converter with analog sensors. Designers benefit from 10-bit ADC resolution for thermocouple-amplifier readout and dual ECCP modules for PWM-controlled indicator dimming.
Recommandé
Battery-Powered Sensor Hubs
Low-voltage LF silicon lets the PIC18LF4523-I/P run from a 2-cell AA or Li-ion pack down to 2.0 V, extending runtime in wireless sensor nodes. The MSSP (SPI/I2C) interfaces directly to sensors like the MCP9808 or LSM6DS, while deep-sleep current (~100 nA typical) preserves battery life. A 10-bit ADC with 12 channels monitors multiple analog inputs simultaneously, and the internal EEPROM (256 bytes) retains calibration constants across sleep cycles.
Recommandé
Motor Drive Companion Controller
The PIC18LF4523-I/P works as a supervisory MCU alongside dedicated motor-driver ICs, handling encoder feedback (via CCP), current sensing (via 10-bit ADC), and CAN or RS-485 host comms. Dual ECCP modules can output complementary PWMs for gate-driver signaling in 3-phase inverter bridges. The 40-pin DIP package remains popular for hand-soldered prototype motor boards, while 32 KB Flash fits closed-loop firmware with tuning tables in EEPROM.
Recommandé
USB-to-UART Bridge Firmware
The PIC18LF4523-I/P pairs naturally with USB-to-UART converters (FT232R, MCP2200) by handling protocol translation on the EUSART and protocol framing in firmware. With 1.5 KB RAM and 32 KB Flash, designers can implement Modbus, DMX512, or proprietary RS-485 stacks in the same chip. The 40-MIPS throughput handles up to 1 Mbaud UART cleanly. Industrial bridge enclosures use this MCU as the host controller for the converter.
Recommandé
HVAC Thermostat Controllers
Wall-mount HVAC thermostats use the PIC18LF4523-I/P for temperature sensing (10-bit ADC + external NTC), relay switching (via ECCP/PWM for TRIAC firing), and backlit LCD driving. The 2.0 V minimum lets the unit survive brownouts on shared 24 VAC transformers, while 1.5 KB RAM supports weekly scheduling tables. EEPROM stores user-setpoints across power cycles, and the wide industrial temperature range (-40C to +85C) suits attic-mounted equipment.
Recommandé
Educational & Development Boards
Through-hole 40-pin DIP packaging makes the PIC18LF4523-I/P a favorite for university embedded-systems labs and hobbyist development boards. Students breadboard the MCU directly, program via ICSP, and learn peripherals (ADC, timers, PWM) without reflow equipment. The wide 2.0-5.5 V VDD simplifies lab supply selection, and the same firmware scales to surface-mount siblings (PIC18LF4523-I/ML) once the prototype matures. MPLAB X IDE and XC8 compiler support is mature.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC18LF4523-I/P — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC18LF4523-I/ML | PIC18LF4523T-I/PT | PIC18F4523-I/P | PIC18LF4520-I/P | PIC18F4520-I/P | PIC18LF4420-I/P |
|---|---|---|---|---|---|---|---|
| Package | 40-PDIP (0.600") | 44-QFN (ML) | 44-TQFP (PT) | 40-PDIP (P) - same | 40-PDIP (P) - same | 40-PDIP (P) - same | 40-PDIP (P) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | PIC18 8-bit | PIC18 8-bit | PIC18 8-bit | PIC18 8-bit | PIC18 8-bit | PIC18 8-bit | PIC18 8-bit |
| CPU Speed | 40 MHz (10 MIPS) | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB |
| RAM | 1536 bytes | 1536 bytes | 1536 bytes | 1536 bytes | 1536 bytes | 1536 bytes | 768 bytes |
| Operating Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 4.2 V to 5.5 V | 2.0 V to 5.5 V | 4.2 V to 5.5 V | 2.0 V to 5.5 V |
| I/O Pins | 36 | 36 | 36 | 36 | 36 | 36 | 36 |
| ADC | 12-ch, 10-bit | 12-ch, 10-bit | 12-ch, 10-bit | 12-ch, 10-bit | 13-ch, 10-bit | 13-ch, 10-bit | 13-ch, 10-bit |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Principaux différenciateurs
- Low-voltage operation down to 2.0 V (vs PIC18F4523-I/P)
- Through-hole PDIP-40 package (vs PIC18LF4523-I/ML (QFN-44))
- Richer peripheral set than PIC18LF4520 (vs PIC18LF4520-I/P)
- 32 KB Flash vs 16 KB on PIC18LF4420 (vs PIC18LF4420-I/P)
Notes de conception
Place a 100 nF decoupling capacitor as close as possible to each VDD pin (pins 11 and 32) and another 100 nF at the AVSS/AVDD pair if separate analog rails are used. Estimated total bulk decoupling for 40 MHz operation is one 10 uF tantalum or ceramic bulk capacitor plus two local 100 nF ceramics. Avoid sharing VDD traces with high-current drivers; the MCU can corrupt Flash if the supply droops below 2.0 V during in-circuit programming.
Keep the 40 MHz crystal traces (OSC1/OSC2, pins 13/14) symmetric and short - maximum trace length 5 mm to avoid stray capacitance shifts that push the oscillator off-frequency. Add a guard ring tied to GND around the crystal and load capacitors. For ICSP, dedicate RB6 (PGC) and RB7 (PGD) pins to programming and add 4.7 kohm pull-downs to prevent spurious resets during board bring-up.
Do not substitute PIC18F4523-I/P into a 3.3 V design - the F variant requires VDD >= 4.2 V to start, while the LF variant starts at 2.0 V. Estimated power-on reset (POR) trip for LF silicon is ~1.8 V typical. Always check the CONFIG register settings: a wrong oscillator config (HS vs XT vs RC) is the most common cause of an apparently dead PIC18 after first programming. Verify CONFIG1H bits via MPLAB X before debugging hardware.
The PIC18LF4523-I/P in PDIP-40 has a thermal resistance theta_JA of approximately 50 C/W in still air. Estimated worst-case power dissipation at 40 MHz with all peripherals active is 250 mW, yielding a junction rise of ~12.5 C above ambient - well within the -40C to +85C industrial range. No heatsink is required for normal operation, but air flow is recommended if the part is sealed inside a plastic enclosure.
Informations de conformité
RoHS and REACH compliant per Microchip material declaration. Not AEC-Q100 qualified - industrial grade only. For automotive designs, select PIC18F4620-I/P or PIC18F46K22-I/P with explicit AEC-Q100 certification.
