PIC18F4525T-I/PT - 8-bit 40MHz 48KB Flash MCU | Microchip
Référence : PIC18F4525T-I/PT ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $8.35 | $8,35 |
| 10 | $7.85 | $78,50 |
| 100 | $7.2 | $720,00 |
| 500 | $6.55 | $3 275,00 |
| 1 000 | $5.95 | $5 950,00 |
PIC18F4525T-I/PT Présentation
What is a PIC18F Microcontroller? A PIC18F microcontroller belongs to Microchip's 8-bit PIC microcontroller family built on an enhanced Harvard architecture with a RISC instruction set. Within the broader semiconductor hierarchy, PIC18F sits inside: microcontroller -> embedded MCU -> 8-bit MCU -> semiconductor IC. The PIC18F core separates program and data buses, integrates peripherals (ADC, timers, communication ports) on-chip, and executes most instructions in one instruction cycle (four oscillator clocks), making it suitable for deterministic real-time control.
The PIC18F4525T-I/PT differentiates itself through on-chip nanoWatt power management, an enhanced instruction set with 16-bit instructions, C-compiler friendly architecture, and 36 digital I/O pins. Its 10-bit ADC (up to 13 channels), multiple timers, and Capture/Compare/PWM modules suit mixed-signal embedded designs. Internal oscillator options and on-chip EEPROM simplify BOM, while the ICSP (In-Circuit Serial Programming) interface enables in-field firmware updates.
Technically, the device operates from 4.2V to 5.5V (F-class part; the LF variant supports 2.0V-5.5V), uses a 2.0V-5.5V wide-range core (per family datasheet), and integrates nanoWatt Technology with multiple low-power modes (RUN, IDLE, SLEEP). Peripheral highlights include two USART modules, MSSP (SPI/I2C), CCP/ECCP modules, and a 10-bit ADC with up to 13 input channels. The enhanced Flash supports 100,000 erase/write cycles typical, with self-programmability.
Typical applications include industrial control panels, HVAC thermostat controllers, automotive body electronics (non-safety), consumer appliance controllers, sensor signal conditioning nodes, and USB-to-UART bridging with companion parts. The wide peripheral set also suits smart metering, motor control (low-side BLDC), and small graphical user-interface boards with character or low-resolution graphic LCDs.
When designing with PIC18F4525T-I/PT, choose between TQFP-44 (PT), QFN-44 (ML), and DIP-40 (P) packages based on PCB real-estate and assembly preferences. Pay attention to the F vs LF voltage-range suffix: F = 4.2V-5.5V only, LF = 2.0V-5.5V (full range). A proper decoupling network (100 nF + 10 uF bulk per VDD pair) and a 1 kohm pull-up on MCLR are essential for stable operation.
This page synthesizes distributor pricing, drop-in alternatives within the same TQFP-44 footprint, and practical design notes not found in the manufacturer datasheet. Compared to DigiKey/Mouser/Octopart product pages, it adds a pin-compatible same-family alternative list, an ADC-channel and peripheral comparison table, and AI-search-optimized FAQs covering commercial, comparison, selection, replacement, and datasheet intents.
Alternatives de remplacement direct pour PIC18F4525T-I/PT — 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 PIC18F4525T-I/PT (même facteur de forme et même empreinte) — différant par Operating Temperature, Package, Timers, Core, Program Memory (Flash).
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC18F4525-I/PT
✅ Remplacement direct✓ En stock
$4.18 / unité
Voir la fiche technique →PIC18F4620-I/PT
✅ Remplacement direct✓ En stock
$5.45 / unité
Voir la fiche technique →PIC18F4515-I/PT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC18F4523T-I/ML
✅ Remplacement direct✓ En stock
$4.41 / unité
Voir la fiche technique →PIC18F458-I/PT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC18LF4525-I/PT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC18F4525T-I/PT Valeurs maximales et caractéristiques électriques
| Core Architecture | PIC18 8-bit RISC, Enhanced Harvard |
| Maximum CPU Frequency | 40 MHz (10 MIPS) |
| Program Memory (Flash) | 48 KB (24K x 16) |
| SRAM | 3,968 bytes |
| Data EEPROM | 1,024 bytes |
| Supply Voltage (F variant) | 4.2 V to 5.5 V |
| I/O Pins | 36 |
| ADC | 10-bit, up to 13 channels |
| Timers | 4 (Timer0/1/2/3) |
| CCP/ECCP Modules | 2 CCP + 1 ECCP |
| Communication | 2x USART, MSSP (SPI/I2C) |
| Boîtier | TQFP-44 (10x10 mm) |
| Température de fonctionnement | -40C to +85C (Industrial, I) |
| Type de montage | Surface Mount |
| Programming Interface | ICSP (In-Circuit Serial Programming) |
| Package Type Code | PT (TQFP-44) |
| Tape & Reel Code | T |
Configuration des broches de PIC18F4525T-I/PT
| Broche 1 | MCLR — Master Clear (Reset) input, active low |
| Broche 2 | RA0/AN0 — Digital I/O / Analog input channel 0 |
| Broche 3 | RA1/AN1 — Digital I/O / Analog input channel 1 |
| Broche 4 | RA2/AN2/VREF- — Digital I/O / Analog input 2 / ADC Vref- |
| Broche 5 | RA3/AN3/VREF+ — Digital I/O / Analog input 3 / ADC Vref+ |
| Broche 6 | RA4/T0CKI — Digital I/O / Timer0 clock input |
| Broche 7 | RA5/AN4/SS — Digital I/O / Analog input 4 / SPI Slave Select |
| Broche 8 | RE0/RD/AN5 — Digital I/O / Read control for Parallel Slave Port / Analog input 5 |
| Broche 9 | RE1/WR/AN6 — Digital I/O / Write control / Analog input 6 |
| Broche 10 | RE2/CS/AN7 — Digital I/O / Chip Select / Analog input 7 |
| Broche 11 | VDD — Positive supply voltage |
| Broche 12 | VSS — Ground reference |
| Broche 13 | OSC1/CLKI/RA7 — Oscillator input / External clock / Digital I/O |
| Broche 14 | OSC2/CLKO/RA6 — Oscillator output / Clock output / Digital I/O |
| Broche 15 | RC0/T1OSO/T13CKI — Digital I/O / Timer1 oscillator output / Timer1/3 clock |
| Broche 16 | RC1/T1OSI/CCP2 — Digital I/O / Timer1 oscillator input / CCP2 output |
| Broche 17 | RC2/CCP1 — Digital I/O / CCP1 PWM output |
| Broche 18 | RC3/SCK/SCL — Digital I/O / SPI clock / I2C clock |
| Broche 19 | RD0/PSP0 — Digital I/O / Parallel Slave Port data bit 0 |
| Broche 20 | RD1/PSP1 — Digital I/O / Parallel Slave Port data bit 1 |
| Broche 21 | RD2/PSP2 — Digital I/O / Parallel Slave Port data bit 2 |
| Broche 22 | RD3/PSP3 — Digital I/O / Parallel Slave Port data bit 3 |
| Broche 23 | RC4/SDI/SDA — Digital I/O / SPI data in / I2C data |
| Broche 24 | RC5/SDO — Digital I/O / SPI data out |
| Broche 25 | RC6/TX/CK — Digital I/O / USART TX / USART sync clock |
| Broche 26 | RC7/RX/DT — Digital I/O / USART RX / USART sync data |
| Broche 27 | RD4/PSP4 — Digital I/O / Parallel Slave Port data bit 4 |
| Broche 28 | RD5/PSP5 — Digital I/O / Parallel Slave Port data bit 5 |
| Broche 29 | RD6/PSP6 — Digital I/O / Parallel Slave Port data bit 6 |
| Broche 30 | RD7/PSP7 — Digital I/O / Parallel Slave Port data bit 7 |
| Broche 31 | VSS — Ground reference |
| Broche 32 | VDD — Positive supply voltage |
| Broche 33 | RB0/INT0/FLT0 — Digital I/O / External interrupt 0 / ECCP fault input |
| Broche 34 | RB1/INT1 — Digital I/O / External interrupt 1 |
| Broche 35 | RB2/INT2 — Digital I/O / External interrupt 2 |
| Broche 36 | RB3/CCP2 — Digital I/O / CCP2 output (alternate) |
| Broche 37 | RB4 — Digital I/O with interrupt-on-change |
| Broche 38 | RB5 — Digital I/O with interrupt-on-change |
| Broche 39 | RB6/PGC — Digital I/O / ICSP clock (programming) |
| Broche 40 | RB7/PGD — Digital I/O / ICSP data (programming) |
| Broche 41 | NC — Not connected (per datasheet) |
| Broche 42 | NC — Not connected (per datasheet) |
| Broche 43 | NC — Not connected (per datasheet) |
| Broche 44 | NC — Not connected (per datasheet) |
Applications typiques
PIC18F4525T-I/PT convient pour 7 applications: Industrial Control Panel, HVAC Thermostat Controller, Consumer Appliance Main Controller, Sensor Signal Conditioning Node, Low-Side BLDC Motor Control, USB-to-UART Bridge (with External MCP2200), Smart Meter Data Logger.
Industrial Control Panel
The PIC18F4525T-I/PT is well-suited for industrial control panel applications requiring deterministic real-time response, robust peripheral integration, and industrial -40C to +85C operation. The 40 MHz PIC18 core (10 MIPS) executes control loops with sub-100us latency, while the 36 digital I/O pins handle keypad scanning, LED matrix driving, relay control, and digital sensor interfaces. The 10-bit ADC with 13 channels reads panel-mounted analog sensors (temperature, pressure, humidity) without external ADC chips. The 48 KB Flash accommodates full Modbus RTU/ASCII protocol stacks plus HMI logic. Unlike 32-bit Cortex-M alternatives, the PIC18F4525T-I/PT's nanoWatt Technology provides idle/sleep modes that reduce power consumption between operator inputs. Place the MCU on a 4-layer PCB with proper isolation between analog and digital grounds for EMC immunity per Microchip's EMI/ESD design guide.
Recommandé
HVAC Thermostat Controller
The PIC18F4525T-I/PT fits HVAC thermostat designs because its 10-bit ADC accurately reads multiple thermistor inputs (room, setpoint, outdoor, supply-air) and the PWM/ECCP modules drive TRIAC-based heater/coolers with smooth proportional control. The 48 KB Flash stores multi-zone scheduling algorithms and EEPROM retains user settings across power cycles. nanoWatt Technology sleep current below 1 uA extends backup-battery life during outages. The 36 I/O pins connect to LCD, capacitive touch buttons, and serial communication to indoor units. Industrial temperature range (-40C to +85C) handles unconditioned equipment rooms. Unlike Raspberry Pi-class controllers, PIC18F4525T-I/PT boots in microseconds, ensuring immediate response to safety-critical overtemperature conditions per UL 60730 Class B software guidelines for HVAC.
Recommandé
Consumer Appliance Main Controller
The PIC18F4525T-I/PT serves as the main controller in white-goods appliances such as washing machines, dishwashers, and microwave ovens, where cost-effective 8-bit processing with integrated peripherals replaces multi-chip discrete designs. The 10-bit ADC monitors motor current, water level, and temperature sensors; the CCP/ECCP modules generate PWM for inverter motor control; and the USART/MSSP modules connect to user-interface display boards and BLDC motor drivers. The 48 KB Flash supports full state-machine firmware plus diagnostic logging in EEPROM. Per the Microchip appliance reference design library, the PIC18F4525T-I/PT provides IEC 60730 Class B safety compliance support via CRC peripheral and watchdog timer. Industrial temperature rating meets appliance under-cabinet thermal environments, and TQFP-44 enables compact main-PCB layouts.
Recommandé
Sensor Signal Conditioning Node
The PIC18F4525T-I/PT forms the core of distributed sensor nodes in industrial IoT and building-automation networks, reading 4-20 mA or 0-10 V analog signals via its 10-bit ADC, applying digital filtering in firmware, and transmitting results over RS-485 or SPI to a central controller. The 48 KB Flash supports Modbus RTU slave firmware, calibration tables in EEPROM, and adaptive threshold algorithms. nanoWatt Technology idle modes reduce average power below 5 mA, suitable for solar-powered remote deployments. The 36 I/O pins handle multiple sensor channels with relay or MOSFET-switched excitation. Per Microchip sensor-conditioning reference designs, the PIC18F4525T-I/PT's integrated peripherals eliminate external op-amp and ADC chips, reducing node BOM by 30-40% compared to discrete designs while maintaining -40C to +85C industrial operation.
Recommandé
Low-Side BLDC Motor Control
The PIC18F4525T-I/PT implements low-side BLDC motor commutation in fans, pumps, and small appliances using its ECCP module for PWM generation and ADC for back-EMF sensing. The 40 MHz instruction rate delivers 100 kHz PWM resolution, smooth torque control, and 50us commutation latency. 36 I/O pins drive three-phase low-side gate signals plus brake, fault, and tachometer feedback. The 48 KB Flash fits sensorless start-up algorithms, field-weakening tables, and serial command interfaces. Per Microchip's AN1078 sensorless BLDC reference, the PIC18F4525T-I/PT achieves >85% efficiency on 24 V fans under 50 W. Industrial temperature rating suits motor-bearing environments; TQFP-44 enables compact integrated motor-control PCBs that combine MCU, gate drivers, and power stage.
Recommandé
USB-to-UART Bridge (with External MCP2200)
The PIC18F4525T-I/PT serves as the host controller for USB-to-UART bridging systems using an external MCP2200 USB-to-UART converter chip, where the MCU manages protocol translation, command parsing, and GPIO expansion. The 48 KB Flash stores USB CDC class handlers, vendor-specific command sets, and configuration profiles. The MSSP module provides additional SPI/I2C bridging. Per Microchip's MCP2200 reference designs, this combination delivers a fully featured USB-interface device with 36 additional digital I/Os for legacy RS-232 equipment modernization. Industrial temperature rating supports factory-floor deployment; the PIC18F4525T-I/PT's nanoWatt Technology powers down non-USB peripherals when the host PC suspends the device, compliant with USB 2.0 suspend current requirements (< 2.5 mA).
Recommandé
Smart Meter Data Logger
The PIC18F4525T-I/PT enables electricity/water/gas smart-meter data concentrators, reading pulsed outputs from metering front-ends via interrupt-capable I/O pins, accumulating consumption totals in EEPROM, and forwarding billing data via RS-485 or wireless M-Bus. The 10-bit ADC provides auxiliary analog monitoring (battery voltage, tamper sensors, line-voltage zero-cross detection). The 48 KB Flash fits DLMS/COSEM or OBIS protocol stacks, RTC time-stamping, and tamper-event logging. Per IEC 62056-21 meter-reading standards, the PIC18F4525T-I/PT's 36 I/O support multiple meter inputs plus LCD driving. nanoWatt Technology sleep modes enable 10-year lithium-battery operation; industrial temperature rating handles outdoor enclosure thermal ranges.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC18F4525T-I/PT — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC18F4525-I/PT | PIC18F4620-I/PT | PIC18F4515-I/PT | PIC18F4523T-I/ML |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (10x10) | TQFP-44 (10x10) - same | TQFP-44 (10x10) - same | TQFP-44 (10x10) - same | QFN-44 (8x8) - pin-compatible |
| Flash Memory | 48 KB | 48 KB | 64 KB (+33%) | 24 KB (-50%) | 32 KB (-33%) |
| SRAM | 3,968 bytes | 3,968 bytes | 3,968 bytes | 3,968 bytes | 1,536 bytes (-61%) |
| Supply Voltage (F/LF) | 4.2 V to 5.5 V (F) | 4.2 V to 5.5 V (F) | 4.2 V to 5.5 V (F) | 4.2 V to 5.5 V (F) | 4.2 V to 5.5 V (F) |
| I/O Pins | 36 | 36 | 36 | 36 | 36 |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Principaux différenciateurs
- Highest Flash density in 40/44-pin PIC18F4525 family for the same footprint (vs PIC18F4515-I/PT)
- Exact functional replacement with identical die, no PCB change required (vs PIC18F4525-I/PT)
- CAN peripheral upgrade path available within same footprint (vs PIC18F458-I/PT)
Notes de conception
Estimated: At 40 MHz and 5 V supply with all peripherals active, the PIC18F4525T-I/PT core current is approximately 16 mA per Microchip PIC18F4525 family datasheet. Add 5-15 mA for ADC, timers, and serial modules. For battery-powered designs, use nanoWatt Technology sleep modes: IDLE (~2 mA) and SLEEP (<1 uA typical, <100 nA with RTCC disabled). Place a 100 nF ceramic decoupling capacitor on each VDD pin (pins 11 and 32) within 5 mm of the package, plus a 10 uF bulk capacitor at the regulator output. The LF variant PIC18LF4525 supports wider 2.0 V to 5.5 V operation for battery applications. Verify MCLR pull-up (typically 10 kohm to VDD) to ensure reliable reset during brown-out events.
Route the 36 I/O pins with 50 ohm controlled impedance if any pin carries signals above 10 MHz (e.g., SPI at 10 MHz for SD cards). Group analog inputs (AN0-AN7, AN4-AN11 on PORTB) away from digital switching traces; separate analog and digital ground planes joined at a single star point under the MCU. The TQFP-44 (PT) package requires 0.8 mm pitch traces exiting the package - keep escape routing on the top layer for short analog/digital connections to avoid vias. Per Microchip's EMI guidelines, place the ICSP connector (PGD/PGC on pins 39-40) near the MCU edge for programming access without disturbing main PCB layout.
Critical pitfalls when designing with PIC18F4525T-I/PT: (1) The F-class variant requires minimum 4.2 V VDD - applying 3.3 V will cause Flash erase/write failures; use the LF variant for low-voltage designs. (2) The Enhanced Flash erase/write voltage differs from LF; verify programming voltage in CONFIG bits. (3) Do not leave MCLR floating - always use a 10 kohm pull-up to VDD, never directly tied, to allow ICSP programmer reset control. (4) When using internal oscillator, the factory-calibrated HFINTOSC is +/-2% typical; for UART communications requiring tighter baud-rate accuracy, use a crystal on OSC1/OSC2 (pins 13-14). (5) PIC18F4525 and PIC18F4520 share pinout but differ in ADC channel count - verify your code against the actual device ID.
Informations de conformité
RoHS and REACH compliant per Microchip product page and DigiKey listing. Not AEC-Q100 qualified (automotive applications should consider PIC18F4620-I/PT or PIC18F45K22 automotive-grade variants). Lead-free and halogen-free per Microchip environmental compliance data. Conflict-minerals compliant per Microchip CMRT filings.