PIC18F6525T-I/PT - 8-bit 40MHz 48KB Flash MCU | Microchip
MPN: PIC18F6525T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $11.2 | $11.20 |
| 10 | $10.15 | $101.50 |
| 100 | $8.95 | $895.00 |
| 500 | $8.05 | $4,025.00 |
| 1,000 | $7.4 | $7,400.00 |
PIC18F6525T-I/PT Overview
A microcontroller (MCU) is a single-chip computer containing a processor core, program memory, data memory, and programmable I/O peripherals. The PIC18 family sits at the high-performance end of Microchip's 8-bit PIC portfolio, employing an enhanced Harvard architecture with separate program and data buses and a hardware multiplier for 16-bit operations. Within the broader taxonomy, PIC18F parts are general-purpose 8-bit microcontrollers -> microcontrollers -> microcontrollers (MCUs) -> microcontrollers and processors -> semiconductors.
Key features include 75 instruction set (83 with extended instruction set enabled), a 10 MIPS sustained execution rate at 40 MHz, a self-programmable FLASH with ICSP (In-Circuit Serial Programming), and nanoWatt technology for low-power sleep modes drawing under 100 nA. The 12-bit A/D converter supports up to 16 input channels, while two capture/compare/PWM modules provide flexible motor-control and signal-generation capability.
The PIC18F6525 architecture uses a 16-bit instruction word with an 8-bit data path and a 31-level hardware stack, enabling deterministic interrupt response suitable for real-time control. Internal oscillator options support operation up to 32 MHz without an external crystal, and the device supports both 3.3V and 5V operation across the industrial temperature range. The nanoWatt power-management features include Idle and Sleep modes with peripheral disable registers, allowing battery-powered applications to achieve quiescent currents well below 1 uA.
Typical applications include industrial control panels, HVAC actuators, automotive body and chassis subsystems, home appliances with user interfaces, and embedded data-acquisition modules. Its high pin count and rich peripheral set also suit multi-axis motor control, sensor hubs, and USB device controllers (with external transceiver).
When designing with this part, confirm supply voltage compatibility (2.0V to 5.5V for LF variants, 4.2V to 5.5V for F variants), allocate adequate FLASH endurance budget for firmware updates, and follow Microchip's recommended decoupling and ICSP layout guidelines. The "T" suffix requires the part to be ordered in 1,000-unit reels for production; for prototypes use PIC18F6525-I/PT in tray.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC18F6525T-I/PT — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC18F6525T-I/PT (same form factor and footprint) — differing in Operating Temperature, Package, Timers, Data EEPROM, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F6525-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F6527-I/PT
✅ Drop-In✓ In Stock
$3.95 / Unit
View Datasheet →PIC18F6621-I/PT
✅ Drop-In✓ In Stock
$8.15 / Unit
View Datasheet →PIC18F6525T-I/PT Maximum Ratings & Electrical Characteristics
| Core | PIC18 (8-bit RISC, enhanced Harvard) |
| Program Memory (FLASH) | 48 KB (24K x 16) |
| Data EEPROM | 1 KB |
| RAM | 3,840 bytes |
| Maximum CPU Speed | 40 MHz (10 MIPS) |
| Operating Voltage | 4.2 V to 5.5 V |
| Digital I/O Pins | 52 |
| ADC | 12-bit, up to 16 channels |
| Timers | 5 (3 x 16-bit, 2 x 8-bit) |
| Capture/Compare/PWM | 2 CCP modules |
| Serial Interfaces | 2x USART, 1x SPI, 1x I2C (MSSP) |
| Package | 64-pin TQFP (PT) 10x10 mm |
| Operating Temperature | -40 C to +85 C (industrial, "I") |
| Mounting Type | Surface Mount (Tape & Reel, "T") |
| MSL Level | 3 (per JEDEC J-STD-020) |
| RoHS Status | Compliant |
| Instruction Set | 75 base instructions (83 extended) |
| Program Memory Type | Enhanced FLASH with self-programming and ICSP |
PIC18F6525T-I/PT Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, active-low; tie to VDD through 10 kohm for normal operation |
| Pin 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Pin 4 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| Pin 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / ADC VREF+ |
| Pin 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 7 | RA5/AN4 — PORTA bit 5 / Analog input 4 |
| Pin 8 | RE0/RD — PORTE bit 0 / Read control for PSP |
| Pin 9 | RE1/WR — PORTE bit 1 / Write control for PSP |
| Pin 10 | RE2/CS — PORTE bit 2 / Chip select for PSP |
| Pin 11 | VDD — Positive supply for I/O and logic (4.2V to 5.5V) |
| Pin 12 | VSS — Ground reference for logic and I/O |
| Pin 13 | OSC1/CLKI/RA7 — Oscillator crystal input / external clock in |
| Pin 14 | OSC2/CLKO/RA6 — Oscillator crystal output / clock out |
| Pin 15 | RC0/T1OSO — PORTC bit 0 / Timer1 oscillator output |
| Pin 16 | RC1/T1OSI — PORTC bit 1 / Timer1 oscillator input |
| Pin 17 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| Pin 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock (MSSP) |
| Pin 19 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data (MSSP) |
| Pin 20 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 21 | RC6/TX1/CK1 — PORTC bit 6 / USART1 transmit / clock |
| Pin 22 | RC7/RX1/DT1 — PORTC bit 7 / USART1 receive / data |
| Pin 23 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port data 0 |
| Pin 24 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port data 1 |
| Pin 25 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port data 2 |
| Pin 26 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port data 3 |
| Pin 27 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port data 4 |
| Pin 28 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port data 5 |
| Pin 29 | RD6/PSP6 — PORTD bit 6 / Parallel Slave Port data 6 |
| Pin 30 | RD7/PSP7 — PORTD bit 7 / Parallel Slave Port data 7 |
| Pin 31 | VSS — Ground |
| Pin 32 | VDD — Positive supply (4.2V to 5.5V) |
| Pin 33 | RB0/INT0 — PORTB bit 0 / External interrupt 0 |
| Pin 34 | RB1/INT1 — PORTB bit 1 / External interrupt 1 |
| Pin 35 | RB2/INT2 — PORTB bit 2 / External interrupt 2 |
| Pin 36 | RB3/INT3 — PORTB bit 3 / External interrupt 3 |
| Pin 37 | RB4 — PORTB bit 4 (interrupt-on-change) |
| Pin 38 | RB5 — PORTB bit 5 (interrupt-on-change) |
| Pin 39 | RB6/PGC — PORTB bit 6 / ICSP clock (programming) |
| Pin 40 | RB7/PGD — PORTB bit 7 / ICSP data (programming) |
| Pin 41 | RF0 — PORTF bit 0 |
| Pin 42 | RF1 — PORTF bit 1 |
| Pin 43 | RF2 — PORTF bit 2 |
| Pin 44 | RF3 — PORTF bit 3 |
| Pin 45 | RF4 — PORTF bit 4 |
| Pin 46 | RF5 — PORTF bit 5 |
| Pin 47 | RF6 — PORTF bit 6 |
| Pin 48 | RF7 — PORTF bit 7 |
| Pin 49 | AVDD — Analog positive supply (5V typical) |
| Pin 50 | AVSS — Analog ground |
| Pin 51 | RG0 — PORTG bit 0 |
| Pin 52 | RG1 — PORTG bit 1 |
| Pin 53 | RG2 — PORTG bit 2 |
| Pin 54 | RG3 — PORTG bit 3 |
| Pin 55 | RG4 — PORTG bit 4 |
| Pin 56 | RH0/AN5 — PORTH bit 0 / Analog input 5 |
| Pin 57 | RH1/AN6 — PORTH bit 1 / Analog input 6 |
| Pin 58 | RH2/AN7 — PORTH bit 2 / Analog input 7 |
| Pin 59 | RH3/AN8 — PORTH bit 3 / Analog input 8 |
| Pin 60 | RH4/AN9 — PORTH bit 4 / Analog input 9 |
| Pin 61 | RH5/AN10 — PORTH bit 5 / Analog input 10 |
| Pin 62 | RH6/AN11 — PORTH bit 6 / Analog input 11 |
| Pin 63 | RH7/AN12 — PORTH bit 7 / Analog input 12 |
| Pin 64 | VSS — Ground |
Typical Applications
PIC18F6525T-I/PT is suitable for 6 applications: Industrial Control Panels, HVAC Actuator and Damper Control, Automotive Body and Chassis Modules, Home Appliance User Interfaces, Multi-Axis Motor Control, Embedded Data Acquisition Modules.
Industrial Control Panels
The PIC18F6525T-I/PT is well suited for industrial HMI and control panels where its 52 I/O pins drive keypads, character or graphic LCDs, status LEDs, and relay or SSR drivers. The 12-bit ADC with 16 channels directly reads potentiometers, analog sensors (4-20 mA conditioned, 0-10V divided), and temperature probes such as NTC thermistors or RTDs. Operating from -40C to +85C industrial temperature with 5V supply, it tolerates factory floor electrical environments when paired with TVS and bulk decoupling. Engineers pair it with external RS-485 transceivers (e.g. MAX3082) for Modbus RTU links, and with HC-06 or AT command-set Bluetooth modules for wireless commissioning. MPLAB X IDE with XC8 compiler supports a full software ecosystem for ladder-logic-equivalent and C-based control firmware.
Recommended
HVAC Actuator and Damper Control
HVAC damper actuators, valve positioners, and variable-speed blower controllers benefit from the PIC18F6525T-I/PT's two CCP modules driving PWM outputs at up to 40 MHz, enabling precise 0-10V or 4-20 mA actuator commands and triac phase-angle firing. Its five timers support simultaneous tachometer feedback, zero-cross detection, and software PWM generation without burdening the core. Industrial temperature rating suits rooftop unit enclosures, and the nanoWatt sleep modes drop quiescent current below 100 nA between calls for heating/cooling. The 12-bit ADC provides closed-loop position feedback, while ICSP allows in-the-field firmware updates without disassembly. Design for surge immunity by adding MOVs across line inputs and following Microchip's HVAC reference design DN0042.
Recommended
Automotive Body and Chassis Modules
Body control modules (BCM), seat controllers, mirror adjusters, and lighting node ECUs frequently use the PIC18F6525T-I/PT for its 52 I/O, 5V tolerance, and robust industrial temperature operation. The 48 KB FLASH supports CAN/LIN gateway stacks, while the 12-bit ADC reads switch and wiper-potentiometer positions. Although not AEC-Q100 qualified, automotive tier-2 suppliers often use industrial-grade PIC18F parts for non-safety subsystems where cost is paramount. Add external CAN transceivers such as MCP2551 or MCP2515 controllers, and use the CCP modules for PWM dimming of LED arrays. For AEC-Q100-qualified pin-compatible alternatives, evaluate PIC18F6621 family with automotive grade suffix.
Recommended
Home Appliance User Interfaces
Washing machines, dishwashers, microwave ovens, and induction cooktops use the PIC18F6525T-I/PT to drive seven-segment or TFT displays, capacitive touch panels (via software or external CTMU), and rotary encoder inputs. With 48 KB FLASH the device accommodates complex menu trees, multilingual strings, and adaptive control algorithms. The two USART interfaces connect to inverter motor drivers and Wi-Fi/BT modules for IoT-ready appliances. Built-in nanoWatt power management extends standby efficiency, and the 64-pin TQFP package fits behind the control panel in slim enclosures. Engineers pair it with external EEPROM (24LC256) for storing cycle history and fault logs.
Recommended
Multi-Axis Motor Control
Three-phase BLDC and stepper motor controllers for robotics, CNC auxiliaries, and small-format 3D printers exploit the PIC18F6525T-I/PT's 40 MHz core, two CCP modules, and five timers for trapezoidal and pseudo-sinusoidal commutation. With 12-bit ADC sampling back-EMF at high PWM duty cycles and 16 KB of free FLASH, designers can implement sensorless startup routines. The 52 I/O pins control six-step or FOC inverter gate drivers directly, while the enhanced USART links to host controllers for trajectory commands. Industrial temperature operation suits enclosed motor housings, and nanoWatt sleep enables low-power standby in battery-fed applications. Microchip AN1078 and AN1083 application notes provide validated BLDC and PMSM firmware patterns.
Recommended
Embedded Data Acquisition Modules
Portable and rack-mount data loggers benefit from the PIC18F6525T-I/PT's 12-bit ADC with 16 channels, 48 KB FLASH for on-device buffer management, and dual USART for GPS or cellular telemetry. SD-card over SPI (via external MCP23S17 expansion if needed) gives gigabytes of timestamped storage, while the I2C bus attaches sensors such as MCP9808 temperature, SHT humidity, and ADXL345 accelerometers. Industrial temperature operation supports outdoor and field-deployed monitoring. The ICSP interface permits field firmware updates, and nanoWatt sleep extends battery life between scheduled acquisition windows. Pair it with external RTCs like MCP79410 for accurate timestamping and with MRF24J40MA for sub-GHz wireless mesh.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F6525T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F6525-I/PT | PIC18F6527-I/PT | PIC18F6621-I/PT | PIC18F8525-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-64 (PT) 10x10 mm | TQFP-64 (PT) 10x10 mm - same | TQFP-64 (PT) 10x10 mm - same | TQFP-64 (PT) 10x10 mm - same | TQFP-80 (PT) 12x12 mm - different |
| Program Memory (FLASH) | 48 KB | 48 KB - same | 48 KB - same | 96 KB (+100%) | 48 KB - same |
| RAM | 3,840 bytes | 3,840 bytes - same | 4,096 bytes (+7%) | 3,840 bytes - same | 3,840 bytes - same |
| EEPROM | 1 KB | 1 KB - same | 1 KB - same | 1 KB - same | 1 KB - same |
| CPU Speed | 40 MHz / 10 MIPS | 40 MHz - same | 40 MHz - same | 40 MHz - same | 40 MHz - same |
| USB 2.0 OTG | No | No | Yes (integrated) | No | No |
| Digital I/O Pins | 52 | 52 - same | 52 - same | 52 - same | 70 (TBD pins on TQFP-80) |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same |
| Pin-to-Pin Compatible | Reference | Yes (identical silicon) | Yes (same package and pinout) | Yes (same package and pinout) | No (different package) |
Key Differentiators
- Higher FLASH and RAM than PIC18F4525 predecessor in same 64-pin TQFP (vs PIC18F4525-I/PT)
- Integrated USB 2.0 OTG option in pin-compatible variant (vs PIC18F6527-I/PT)
- Drop-in 96 KB FLASH upgrade path within the same datasheet family (vs PIC18F6621-I/PT)
Design Notes
Decouple VDD and VSS pairs with 100 nF ceramic capacitors placed within 5 mm of each supply pin, plus a single 10 uF bulk tantalum or ceramic capacitor near the package. AVDD and AVSS require their own 100 nF decoupling plus a small ferrite bead or 10 ohm resistor to isolate analog reference from digital switching noise. The PIC18F6525's ADC achieves data-sheet accuracy only when VREF+ noise is below 100 uVrms; share VDD with a dedicated LDO (MCP1700 or MCP1755) if the board has switching converters nearby.
Route the ICSP signals (RB6/PGC and RB7/PGD) to a 6-pin header or 2x3 ribbon connector placed at the board edge for production programming. Keep trace lengths under 100 mm and avoid routing them near switching nodes or oscillators. The 64-pin TQFP has 0.5 mm pitch; follow IPC-7351 land pattern with 0.3 mm pad width and 1.0 mm pad length, and use NSMD (non-solder mask defined) pads to improve solder joint reliability per IPC-A-610 acceptance criteria.
Never leave MCLR floating - tie it to VDD through a 10 kohm resistor with a 100 nF cap to ground for noise immunity; an open MCLR pin picks up injected noise and causes spurious resets. Verify the configuration bits match the oscillator mode (HS, XT, EC, INTRC) - mis-setting HS for an internal RC clock is a common factory programming error. The 'T' suffix requires the part to be soldered within 168 hours of MSL3 bag opening; bake at 125 C for 24 hours if exceeded. Do not exceed 5.5V on any pin or 10 mA per I/O (20 mA total sink/source across all pins) without aggregation limits.
Compliance Information
RoHS and REACH compliant per Microchip product page; lead-free matte-tin plating. Not AEC-Q100 qualified - not suitable for automotive safety-critical applications.
