PIC18F8520T-E/PT - 25MHz 8-bit MCU 32KB Flash 80-TQFP | Microchip
MPN: PIC18F8520T-E/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.62 | $8.62 |
| 10 | $7.74 | $77.40 |
| 100 | $6.91 | $691.00 |
| 500 | $6.18 | $3,090.00 |
| 1,000 | $5.52 | $5,520.00 |
PIC18F8520T-E/PT Overview
An 8-bit microcontroller (MCU) is a self-contained programmable processor that integrates CPU, non-volatile program memory, volatile data RAM, and peripheral subsystems (timers, ADC, communication ports, I/O) onto a single silicon die. PIC18F-series MCUs use an enhanced Harvard RISC architecture with a 16-bit instruction word and 8-bit data path, achieving up to 10 MIPS at 40 MHz while retaining upward source compatibility with PIC16/PIC17 devices.
Key features of the PIC18F8520 include a second USART/serial port beyond the PIC18F452 baseline, multiple capture/compare/PWM modules, an on-chip 10-bit ADC, and code-protection fuses for secure firmware. The 70 I/O pins support extensive parallel expansion, making the device suitable for human-machine-interface panels, instrumentation, and motor-control front-ends. The flash program memory supports in-circuit serial programming (ICSP) and in-application reprogramming.
Architecturally the PIC18F8520 separates code (16-bit wide flash) and data (8-bit SRAM) buses for predictable real-time response. Power-management features include multiple oscillator modes (HS, XT, LP, RC), a power-on reset, brown-out reset, watchdog timer with separate on-chip oscillator, and an ultra-low-power SLEEP mode drawing microampere-level current.
Typical applications span industrial control panels, automotive instrument clusters, white-goods user interfaces, and embedded sensor hubs that require >64 I/O equivalents. Compared with smaller-package PIC18F variants, the 80-TQFP version exposes additional ports for character-LCD bus, keypad matrix, and analog front-end connectivity.
When designing with this device, ensure the supply rail sits between 4.2 V and 5.5 V and reserve a pair of pins for ICSP clock/data to maintain field-reprogramming capability. The 'E' temperature grade makes the part suitable for under-hood automotive or outdoor industrial enclosures where commercial-grade parts would drift outside spec.
This page synthesizes XAIPART distributor pricing, Microchip same-family drop-in alternatives, pin-compatibility analysis, and design guidance not aggregated on a single distributor product page.
Drop-in alternatives for PIC18F8520T-E/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 PIC18F8520T-E/PT (same form factor and footprint) — differing in Core Architecture, Package, ADC, Operating Temperature, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F8520-I/PT
✅ Drop-In✓ In Stock
$5.1586 / Unit
View Datasheet →PIC18F8520-E/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F8520T-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F8520T-I/PTG
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F6520-I/PT
✅ Drop-In✓ In Stock
$6.1 / Unit
View Datasheet →PIC18F8520T-E/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18F, 8-bit enhanced Harvard RISC |
| Instruction Set Width | 16-bit |
| Data Bus Width | 8-bit (data), 16-bit (instruction) |
| Maximum Clock Speed | 40 MHz (10 MIPS); 25 MHz specified at 5 V per distributor listings |
| Program Memory (Flash) | 32 KB (16K x 16) |
| Data RAM | 2 KB |
| I/O Ports | 70 |
| Supply Voltage (Vdd) | 4.2 V to 5.5 V |
| Operating Temperature | -40 °C to +125 °C (extended 'E' grade) |
| Package | 80-pin TQFP (PT), 12x12 mm, 1 mm height |
| Mounting Type | Surface Mount |
| ADC | 10-bit, multi-channel (on-chip) |
| Communication Peripherals | 2x USART/SCI, I2C, SPI |
| Timers / CCP | Multiple 8/16-bit timers, capture/compare/PWM modules |
| Programming Method | ICSP (In-Circuit Serial Programming), in-application reprogramming |
| ROM Type | Flash |
| Life Cycle Stage | Active |
| Packaging Format | Tape and Reel ('T' suffix) |
PIC18F8520T-E/PT Pin Configuration
| Pin 1 | OSC1/CLKI/RA7 — Oscillator input / external clock / PORTA bit 7 |
| Pin 2 | OSC2/CLKO/RA6 — Oscillator output / PORTA bit 6 |
| Pin 3 | MCLR — Master clear (reset) input |
| Pin 4 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Pin 5 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Pin 6 | RA2/AN2/Vref- — PORTA bit 2 / analog input 2 / ADC Vref- |
| Pin 7 | RA3/AN3/Vref+ — PORTA bit 3 / analog input 3 / ADC Vref+ |
| Pin 8 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 9 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / SPI slave select |
| Pin 10 | Vss — Ground reference |
| Pin 11 | VDD — Positive supply (4.2 V to 5.5 V) |
| Pin 12 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| Pin 13 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| Pin 14 | RB2/INT2 — PORTB bit 2 / external interrupt 2 |
| Pin 15 | RB3/INT3/CCP2 — PORTB bit 3 / external interrupt 3 / CCP2 |
| Pin 16 | RB4 — PORTB bit 4 (interrupt-on-change) |
| Pin 17 | RB5 — PORTB bit 5 (interrupt-on-change) |
| Pin 18 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 19 | RB7/PGD — PORTB bit 7 / ICSP data |
| Pin 20 | Vss — Ground reference |
| Pin 21 | VDD — Positive supply |
| Pin 22 | RC0/T1OSO/T13CKI — PORTC bit 0 / Timer1 oscillator output / Timer1/Timer3 clock input |
| Pin 23 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| Pin 24 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| Pin 25 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pin 26 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin 27 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 28 | RC6/TX1/CK1 — PORTC bit 6 / USART1 transmit / USART1 clock |
| Pin 29 | RC7/RX1/DT1 — PORTC bit 7 / USART1 receive / USART1 data |
| Pin 30 | Vss — Ground reference |
| Pin 31 | VDD — Positive supply |
| Pin 32 | RD0 — PORTD bit 0 |
| Pin 33 | RD1 — PORTD bit 1 |
| Pin 34 | RD2 — PORTD bit 2 |
| Pin 35 | RD3 — PORTD bit 3 |
| Pin 36 | RD4 — PORTD bit 4 |
| Pin 37 | RD5 — PORTD bit 5 |
| Pin 38 | RD6 — PORTD bit 6 |
| Pin 39 | RD7 — PORTD bit 7 |
| Pin 40 | Vss — Ground reference |
| Pin 41 | VDD — Positive supply |
| Pin 42 | RE0/RD/AN5 — PORTE bit 0 / read strobe for parallel slave port / analog input 5 |
| Pin 43 | RE1/WR/AN6 — PORTE bit 1 / write strobe for PSP / analog input 6 |
| Pin 44 | RE2/CS/AN7 — PORTE bit 2 / chip select for PSP / analog input 7 |
| Pin 45 | Vss — Ground reference |
| Pin 46 | VDD — Positive supply |
| Pin 47 | RF0/AN8 — PORTF bit 0 / analog input 8 |
| Pin 48 | RF1/AN9/C2OUT — PORTF bit 1 / analog input 9 / comparator 2 output |
| Pin 49 | RF2/AN10/C1OUT — PORTF bit 2 / analog input 10 / comparator 1 output |
| Pin 50 | RF3/AN11 — PORTF bit 3 / analog input 11 |
| Pin 51 | RF4/AN12 — PORTF bit 4 / analog input 12 |
| Pin 52 | RF5/AN13 — PORTF bit 5 / analog input 13 |
| Pin 53 | RF6/AN14 — PORTF bit 6 / analog input 14 |
| Pin 54 | RF7/AN15 — PORTF bit 7 / analog input 15 |
| Pin 55 | Vss — Ground reference |
| Pin 56 | VDD — Positive supply |
| Pin 57 | RG0 — PORTG bit 0 |
| Pin 58 | RG1 — PORTG bit 1 |
| Pin 59 | RG2 — PORTG bit 2 |
| Pin 60 | RG3 — PORTG bit 3 |
| Pin 61 | RG4 — PORTG bit 4 |
| Pin 62 | RG5 — PORTG bit 5 |
| Pin 63 | RG6 — PORTG bit 6 |
| Pin 64 | RG7 — PORTG bit 7 |
| Pin 65 | Vss — Ground reference |
| Pin 66 | VDD — Positive supply |
| Pin 67 | RH0/A16 — PORTH bit 0 / external memory address bit 16 |
| Pin 68 | RH1/A17 — PORTH bit 1 / external memory address bit 17 |
| Pin 69 | RH2/A18 — PORTH bit 2 / external memory address bit 18 |
| Pin 70 | RH3/A19 — PORTH bit 3 / external memory address bit 19 |
| Pin 71 | Vss — Ground reference |
| Pin 72 | VDD — Positive supply |
| Pin 73 | RJ0 — PORTJ bit 0 |
| Pin 74 | RJ1 — PORTJ bit 1 |
| Pin 75 | RJ2 — PORTJ bit 2 |
| Pin 76 | RJ3 — PORTJ bit 3 |
| Pin 77 | RJ4 — PORTJ bit 4 |
| Pin 78 | RJ5 — PORTJ bit 5 |
| Pin 79 | RJ6 — PORTJ bit 6 |
| Pin 80 | RJ7 — PORTJ bit 7 |
Typical Applications
PIC18F8520T-E/PT is suitable for 6 applications: Industrial Control Panels, Automotive Instrument Clusters, White-Goods User Interfaces, Embedded Sensor Hubs, Motor Control Front-Ends, Point-of-Sale Terminal Peripherals.
Industrial Control Panels
The PIC18F8520T-E/PT's 70 general-purpose I/O pins and dual USART peripherals directly drive multi-row keypads, character LCD buses (4-bit or 8-bit), and RS-485/RS-232 control networks common in industrial panel PLCs. Its extended -40C to +125C temperature grade tolerates cabinet interiors near power contactors, while 32 KB flash accommodates full Modbus RTU and ladder-logic firmware. The on-chip 10-bit ADC scans up to 16 analog channels for temperature, pressure, and current sensing without external converters. Compared with smaller PIC18F variants, the 80-TQFP version eliminates external I/O expanders, reducing PCB area and BOM cost in multi-channel controller designs.
Recommended
Automotive Instrument Clusters
The PIC18F8520T-E/PT's extended -40C to +125C temperature grade and 70 I/O lines make it well suited for automotive instrument-cluster driver boards that must survive under-hood thermal stress and drive multiple gauge stepper motors, LED bargraphs, and a CAN or LIN gateway. The 10 MIPS core handles real-time speedometer, tachometer, and fuel-level smoothing while leaving headroom for diagnostic routines. The flash memory supports OTA-like firmware refresh via the on-board ICSP interface during end-of-line calibration. Pin-to-pin compatibility with the PIC18F8520-I/PT enables a cost-down variant for non-extreme-temperature clusters.
Recommended
White-Goods User Interfaces
Washing machines, dishwashers, and microwave-oven control boards benefit from the PIC18F8520T-E/PT's 70 I/O pins to scan capacitive touch matrices, rotary encoders, and 7-segment or TFT displays without external decoder ICs. Its 32 KB flash is sufficient for state-machine firmware governing wash cycles, door-lock interlocks, and fault-logging EEPROM emulation. The extended temperature rating protects against steam-condensation environments in laundry appliances. Dual USART ports enable simultaneous inverter-bus telemetry and BLE/Wi-Fi module communication for smart-home integration.
Recommended
Embedded Sensor Hubs
The PIC18F8520T-E/PT serves as a multi-protocol sensor aggregator in industrial IoT edge nodes, where its 70 I/O lines connect to SPI temperature/pressure sensors, I2C accelerometers, and analog load cells through the on-chip 10-bit ADC. The 10 MIPS core runs deterministic sensor-fusion loops at 1 kHz while serving Modbus queries on USART1 and an SPI-attached LoRa modem on USART2/SPI. In-application reprogramming allows remote firmware updates as sensor calibration evolves. The flash-based architecture simplifies UL/IEC 60730 household appliance safety pre-certification through Microchip's V&V libraries.
Recommended
Motor Control Front-Ends
The PIC18F8520T-E/PT's capture/compare/PWM modules generate complementary PWM signals for three-phase brushless DC (BLDC) motor control in fans, pumps, and small drives. With 70 I/O pins the MCU can simultaneously command six PWM channels, read Hall-effect rotor position sensors, monitor DC-link current via the on-chip ADC, and report status over CAN. The 10 MIPS throughput closes the current-control loop in under 20 microseconds at 40 MHz, well within typical 50 microsecond PWM periods. The extended temperature grade supports integration directly on the motor stator housing.
Recommended
Point-of-Sale Terminal Peripherals
POS terminals require multiple serial peripherals (magnetic-stripe reader, receipt printer, customer display, fiscal printer) plus a keypad, character LCD, and Ethernet module. The PIC18F8520T-E/PT's dual USART plus hardware SPI/I2C peripheral set covers these buses while its 70 I/O pins handle the keypad matrix and LCD bus in parallel. The 32 KB flash stores price-lookup tables, transaction journals, and encrypted firmware using Microchip's AES library. Extended temperature operation supports deployment in outdoor kiosks and refrigerated cabinets.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F8520T-E/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F8520-I/PT | PIC18F8520-E/PT | PIC18F8520T-I/PT | PIC18F8520T-I/PTG | PIC18F6520-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-80 (PT) 12x12 mm | TQFP-80 (PT) 12x12 mm | TQFP-80 (PT) 12x12 mm | TQFP-80 (PT) 12x12 mm | TQFP-80 (PT) 12x12 mm | TQFP-80 (PT) 12x12 mm |
| Core / Architecture | 8-bit PIC18F RISC | 8-bit PIC18F RISC | 8-bit PIC18F RISC | 8-bit PIC18F RISC | 8-bit PIC18F RISC | 8-bit PIC18F RISC |
| Program Memory (Flash) | 32 KB (16K x 16) | 32 KB | 32 KB | 32 KB | 32 KB | 64 KB (32K x 16) - 100% more flash |
| Data RAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| I/O Pins | 70 | 70 | 70 | 70 | 70 | 70 |
| Supply Voltage | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V |
| Operating Temperature | -40C to +125C (extended 'E') | -40C to +85C (industrial 'I') | -40C to +125C (extended 'E') | -40C to +85C (industrial 'I') | -40C to +85C (industrial 'I') | -40C to +85C (industrial 'I') |
| Packaging Format | Tape & Reel ('T') | Tray | Tray (no 'T' suffix) | Tape & Reel | Tape & Reel, lead-free | Tray |
Key Differentiators
- Extended industrial temperature grade -40C to +125C (vs PIC18F8520T-I/PT)
- Tape-and-reel packaging for high-volume SMT assembly (vs PIC18F8520-E/PT (tray))
- Native 80-TQFP for high-pin-count parallel interfaces (vs PIC18F6520-I/PT (same package, 64 KB flash))
Design Notes
Place 100 nF decoupling capacitors on every Vdd/Vss pin pair (10 pairs across the TQFP-80) located within 3 mm of each supply pin. Add a bulk 10 uF tantalum and 100 uF electrolytic at the regulator to suppress the inrush of CCP PWM outputs and ADC reference transients. Without these, brown-out resets can trigger under heavy PWM load. According to the PIC18F8520 family datasheet DS39622, Vdd must rise monotonically above 4.2 V within 50 ms for reliable power-on reset behavior.
Route the 40 MHz HS-mode oscillator traces (OSC1/OSC2) symmetrically and within 5 mm of the IC, guarded by a ground ring. Place the crystal case grounded and keep switching signals (PWM, USART) at least 10 mm away to avoid injection of jitter. The analog reference pins (Vref+/Vref-, AN0-AN15) should be isolated by a ground moat when the digital I/O rate exceeds 10 MHz, since the on-chip ADC achieves only 10-bit resolution without careful analog routing.
Do not exceed 5.5 V on any pin; the absolute maximum Vdd rating per the PIC18F8520 datasheet is 7 V, but extended operation above 5.5 V voids the -40C to +125C temperature guarantee. Always configure the BOR (Brown-Out Reset) voltage to 4.0 V via configuration bits to protect against slowly-decaying supplies. Enable the watchdog timer (WDT) for unattended deployments; default-disabled WDTs are a top cause of field-locked industrial panels. Lastly, reserve the RB6/RB7 pins for ICSP - reassigning them to general I/O prevents in-circuit field reprogramming.
Compliance Information
Lead-free 80-TQFP package; RoHS and REACH compliant per Microchip product environmental statements. Not AEC-Q100 qualified - automotive designs should validate thermal/EMC performance against AEC-Q100 specifications independently. PIC18F8520T-E/PT does not carry automotive PPAP documentation.
