PIC18F8525T-I/PT - 8-Bit 40MHz 48KB Flash MCU | Microchip
MPN: PIC18F8525T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.55 | $8.55 |
| 10 | $7.69 | $76.90 |
| 100 | $6.83 | $683.00 |
| 500 | $5.97 | $2,985.00 |
| 1,000 | $5.12 | $5,120.00 |
PIC18F8525T-I/PT Overview
A microcontroller (MCU) is a single-chip computer that contains a CPU, non-volatile program memory, volatile data memory, and peripheral interfaces such as timers, ADC, UART, I2C, and SPI on one die. PIC18 microcontrollers use Microchip's enhanced RISC Harvard architecture with 16-bit opcodes and 8-bit data path, positioning them in the 8-bit MCU family that also includes PIC16 and PIC10/12/14 families, occupying the middle performance tier above baseline PIC16 devices.
Key features include a 10-bit analog-to-digital converter with up to 16 channels, two USART modules, an MSSP (Master Synchronous Serial Port) configurable for SPI or I2C, a CAN 2.0B module, multiple capture/compare/PWM modules, and a 16-bit wide data path for high-throughput memory access. The -I suffix indicates the industrial operating temperature range from -40°C to +85°C, while the TQFP-80 (PT) package suits industrial and commercial designs that demand high pin counts.
The device operates from 4.2 V to 5.5 V and supports in-circuit serial programming (ICSP) plus in-circuit debugger (ICD) interfaces, enabling field firmware updates and accelerated development cycles. Its enhanced flash memory supports endurance of 100K cycles minimum and retention of more than 40 years, reducing field maintenance for long-life industrial installations.
Typical applications include industrial automation controllers, building automation, HVAC control panels, automotive body and comfort modules, point-of-sale terminals, and embedded human-machine interface (HMI) controllers. The wide I/O count and rich peripheral set suit designs that aggregate many discrete functions onto a single MCU.
When designing with this part, allocate a 4.7 µF bulk capacitor plus a 0.1 µF decoupling capacitor for each VDD/VSS pair and follow Microchip's recommended layout for MCLR reset to ensure reliable in-circuit programming. Plan voltage rails within the 4.2 V to 5.5 V window and reserve RA4/RB0 for low-voltage ICD if debugging tools are required.
This page synthesizes distributor pricing, drop-in alternatives, and practical engineering notes not found in the manufacturer datasheet, giving engineers a faster route from specification to purchase order.
Drop-in alternatives for PIC18F8525T-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 PIC18F8525T-I/PT (same form factor and footprint) — differing in Core Architecture, Package, Data RAM, Operating Temperature, ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F8525-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F8525T-E/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F8527T-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F8621-I/PT
✅ Drop-In✓ In Stock
$12.4 / Unit
View Datasheet →PIC18F8520T-E/PT
✅ Drop-In✓ In Stock
$5.52 / Unit
View Datasheet →PIC18F8520-I/PT
✅ Drop-In✓ In Stock
$5.1586 / Unit
View Datasheet →PIC18F8525T-I/PT Maximum Ratings & Electrical Characteristics
| Family | PIC18F |
| Core | PIC 8-bit enhanced RISC |
| Data Bus Width | 8-bit (16-bit instruction) |
| Program Memory | 48 KB (24K x 16) FLASH |
| RAM | 3840 bytes |
| EEPROM | 1024 bytes |
| Maximum Clock Speed | 40 MHz |
| Supply Voltage Range | 4.2 V to 5.5 V |
| Number of I/O Pins | 70 |
| Number of ADC Channels | 16 (10-bit) |
| Package Type | 80-TQFP (12x12 mm) |
| Operating Temperature | -40°C to +85°C (industrial) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC18F8525T-I/PT Pin Configuration
| Pin 1 | RH0 — General purpose I/O / Parallel slave port |
| Pin 2 | RH1 — General purpose I/O / Parallel slave port |
| Pin 3 | RH2 — General purpose I/O / Parallel slave port |
| Pin 4 | RH3 — General purpose I/O / Parallel slave port |
| Pin 5 | RF1 — General purpose I/O / Analog input AN6 |
| Pin 6 | RF2 — General purpose I/O / Analog input AN7 |
| Pin 7 | RF3 — General purpose I/O / Analog input AN8 |
| Pin 8 | RF4 — General purpose I/O / Analog input AN9 |
| Pin 9 | RF5 — General purpose I/O / Analog input AN10 |
| Pin 10 | RF6 — General purpose I/O / Analog input AN11 |
| Pin 11 | RF7 — General purpose I/O / Analog input AN12 |
| Pin 12 | VSS — Ground reference |
| Pin 13 | VDD — Power supply (4.2V to 5.5V) |
| Pin 14 | AVDD — Analog power supply |
| Pin 15 | AVSS — Analog ground |
| Pin 16 | RB0 — General purpose I/O / External interrupt / ICSP data |
| Pin 17 | RB1 — General purpose I/O / ICSP clock |
| Pin 18 | RB2 — General purpose I/O / CAN RX |
| Pin 19 | RB3 — General purpose I/O / CAN TX |
| Pin 20 | RA0 — General purpose I/O / Analog input AN0 |
Typical Applications
PIC18F8525T-I/PT is suitable for 6 applications: Industrial Automation Controllers, Building Automation and HVAC, Automotive Body and Comfort Modules, Point-of-Sale Terminals, Embedded HMI Controllers, Data Acquisition and Instrumentation.
Industrial Automation Controllers
The PIC18F8525T-I/PT's 48KB flash and 3840 bytes of RAM suit mid-complexity industrial controllers where deterministic 8-bit execution, robust -40C to +85C operation, and 70 GPIO are required. Its dual USART, MSSP (SPI/I2C), and CAN 2.0B module allow simultaneous connectivity to sensors, HMI panels, motor drives, and PLC backbones on the factory floor. The 16-channel 10-bit ADC handles analog transducer inputs from thermocouples or 4-20 mA loops via external signal conditioning. Per Microchip datasheet DS39609B, in-circuit serial programming enables field firmware updates, critical for conveyor, pump, or HVAC subsystems that cannot easily be returned to bench for software upgrades.
Recommended
Building Automation and HVAC
Building automation controllers demand low-power, reliable control and broad peripheral integration - exactly what the PIC18F8525T-I/PT delivers. Its 70 I/O pins support multiple relay drivers, triac outputs for AC dimming, and multiple keypad/scan interfaces for room thermostats and zone controllers. The 10-bit 16-channel ADC reads thermistor beads and pressure sensors, while I2C/SPI buses interface to external RTCs, EEPROMs, and humidity sensors. With 100K flash endurance cycles, the device survives multi-decade HVAC field deployments. The two USARTs enable simultaneous Modbus master/slave bridges to external equipment over RS-485.
Recommended
Automotive Body and Comfort Modules
The PIC18F8525T-I/PT is well positioned for non-safety automotive body controllers (door modules, seat controllers, HVAC panels) where its integrated CAN 2.0B module enables communication with the vehicle bus. The 70 GPIO drive LED arrays, switched illumination drivers, keypads, and motor bridges for window lift or mirror actuators. Industrial -40C to +85C operation handles interior environments; for under-hood duties choose the -E extended grade PIC18F8525T-E/PT instead. Its enhanced flash memory stores vehicle configuration data and supports OTA-like reprogramming via ICSP for OEM production-line flashing.
Recommended
Point-of-Sale Terminals
Point-of-Sale (POS) terminals need deterministic 8-bit performance, ample flash for secure payment protocol stacks, and rich peripherals for display, keypad, magstripe, and contactless interface chips. The PIC18F8525T-I/PT's 48KB enhanced flash accommodates TLS-lite libraries and receipt-printer handlers. MSSP provides SPI to graphic LCDs while USARTs link to magstripe readers or GSM/4G modems. The 70 GPIO drive matrix keypads and the SD-card socket for transaction logs. With operating temperature -40C to +85C, the part survives retail and warehouse environments.
Recommended
Embedded HMI Controllers
Human-machine interface (HMI) controllers for industrial equipment benefit from the PIC18F8525T-I/PT's high GPIO count and enhanced flash for graphical displays. The 48KB enhanced flash supports complex menu trees, custom fonts, and 9-bit UI protocols, while 3840 RAM buffers LCD frame updates. MSSP drives SPI-based TFT controllers, and dual USARTs bridge Modbus RTU or RS-232 to legacy equipment. The 16 ADC inputs read analog inputs from rotary encoders, sliders, or temperature probes. Datasheet DS39609B confirms the enhanced flash supports C optimized compilation with XC8.
Recommended
Data Acquisition and Instrumentation
Data acquisition (DAQ) front-ends combining many analog and digital sensors fit naturally on the PIC18F8525T-I/PT. Its 10-bit, 16-channel ADC samples thermocouples, RTDs, 4-20 mA loops, and strain gauges after external signal conditioning. The dual USART streams Modbus records to a host, while SPI/I2C expand memory or drive digital potentiometers. 48KB flash stores calibration tables, lookup conversions, and packetization code. Industrial temperature grade -40C to +85C ensures reliability in lab and field instrumentation enclosures. Per Microchip datasheet DS39609B, the ADC has 13.5 us typical conversion time, suiting 10 kHz aggregate sample rates.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F8525T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F8525-I/PT | PIC18F8525T-E/PT | PIC18F8527T-I/PT | PIC18F8621-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 80-TQFP (12x12 mm) | 80-TQFP (12x12 mm) - same | 80-TQFP (12x12 mm) - same | 80-TQFP (12x12 mm) - same | 80-TQFP (12x12 mm) - same |
| Program Memory (Flash) | 48 KB | 48 KB (identical) | 48 KB (identical) | 96 KB (+100%) | 64 KB (+33%) |
| RAM | 3840 bytes | 3840 bytes | 3840 bytes | 3936 bytes | 3840 bytes |
| Maximum Clock | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Operating Temperature | -40 to +85 C (industrial) | -40 to +85 C | -40 to +125 C (extended) | -40 to +85 C | -40 to +85 C |
| I/O Pins | 70 | 70 | 70 | 70 | 70 |
| ADC | 10-bit, 16 channels | 10-bit, 16 channels | 10-bit, 16 channels | 10-bit, 16 channels | 10-bit, 16 channels |
| CAN Module | Yes (CAN 2.0B) | Yes | Yes | Yes | Yes |
Key Differentiators
- Large flash with CAN 2.0B (vs PIC18F8520-I/PT)
- Lower flash option same package (vs PIC18F8520T-E/PT)
- Drop-in upgrade to PIC18F8621 (vs PIC18F8621-I/PT)
Design Notes
Per Microchip datasheet DS39609B, the PIC18F8525T-I/PT requires decoupling on every VDD/VSS pair: a 100 nF ceramic placed within 5 mm of each pin plus a single 4.7 µF bulk at the chip supply entry. AVDD and AVSS should also have a 100 nF cap close to those pins if ADC channels are used. Power-supply ripple below 50 mVpp is recommended when reading 10-bit ADC at full accuracy. Estimated current consumption at 40 MHz is approximately 25 mA from 5V excluding I/O drive.
A common pitfall is failing to provide the MCLR pin with the recommended pull-up network of 10 kΩ to VDD plus a 100 nF to ground for software-configurable reset. Forgetting this leaves the part in reset or vulnerable to noise. Another pitfall is leaving unused I/O pins floating - they must be configured as outputs low or inputs with weak pull-ups enabled; floating CMOS inputs can draw several µA each and inject noise. Lastly, configure the 48 KB flash linker script with proper bankswitching and reserved vector locations per Microchip MPLAB XC8 settings to avoid runtime exceptions.
Layout should keep the 40 MHz oscillator traces short (under 10 mm) and shielded by a ground guard ring. Separate analog and digital VDD traces with a star-ground at the chip's AVSS pin to avoid digital switching noise coupling into ADC readings; datasheet DS39609B shows reference layouts in the family design guide. The 80-pin TQFP's 12x12 mm body requires ~14x14 mm pad array, and thermal relief spokes under the chip improve soldering in mass-production reflow.
Compliance Information
RoHS/REACH compliant per Microchip product page; industrial temperature grade -I/PT is not AEC-Q100 qualified, automotive applications should select -E/PT extended grade or verify compliance per datasheet DS39609B.
