PIC18LF8628-I/PT - 96KB Flash 8-bit MCU, 80-pin TQFP | Microchip
MPN: PIC18LF8628-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6 | $6.00 |
| 10 | $5.5 | $55.00 |
| 100 | $5.1 | $510.00 |
| 500 | $4.7 | $2,350.00 |
| 1,000 | $4.2 | $4,200.00 |
PIC18LF8628-I/PT Overview
An 8-bit microcontroller (MCU) is a programmable computation engine built around an 8-bit data path, ROM/Flash for program storage, RAM for data, and a fixed set of on-chip peripherals (ADC, timers, UART/SPI/I2C, PWM). The PIC18 family is Microchip's high-pin-count, register-rich 8-bit line positioned between baseline PIC10/12/16 and 16-bit dsPIC/PIC24 architectures; the LF sub-family adds nanoWatt XLP technology for battery-friendly sleep currents. Within Microchip's hierarchy, PIC18 sits under: 8-bit PIC MCU -> PIC18 -> PIC18F/LF66K/67K/86K/87K -> PIC18LF8628.
Key features of the PIC18LF8628 include 96 KB self-programmable Flash with block-erase support, 4 KB SRAM, 1024-byte non-volatile Data EEPROM for parameter storage, a 12-bit A/D converter with up to 16 input channels, multiple capture/compare/PWM modules, two MSSP ports for SPI or I2C, two USART modules with LIN support, an enhanced CCP, an LCD segment driver interface option in related parts, and nanoWatt XLP sleep modes drawing microamp-level standby current. The wide operating voltage (2.0-3.6V) and 70+ I/O pins simplify interface to large human-machine or sensor arrays.
Internally, the PIC18LF8628 uses an enhanced Harvard architecture with separate program and data buses plus a 16-bit instruction word. An 8x8 hardware multiplier and 16-bit barrel-style instruction pipeline accelerate C-compiled code relative to baseline PIC16 devices. Internal oscillator blocks and the PLL allow flexible clocking from a 32 kHz secondary source up to 40 MHz, while the XLP power-management unit gates peripherals individually for deep-sleep operation.
Typical applications include industrial automation controllers, HVAC and building-management panels, large-format user-interface and keypad/display nodes, automotive accessory modules, point-of-sale terminals, sensor-fusion aggregators, and any battery-backed instrumentation requiring non-volatile parameter retention (Data EEPROM) alongside substantial program memory.
When designing with the PIC18LF8628, prioritize decoupling per the Microchip PIC18F8723/8628 family datasheet and budget for in-circuit serial programming (ICSP) header pins. The Data EEPROM endurance is rated for 100k erase/write cycles - exceed only with wear-leveling in firmware.
This page combines verified distributor pricing (as of 2026-09-29), drop-in same-family alternatives, and practical design notes not consolidated in the manufacturer datasheet PDF.
Drop-in alternatives for PIC18LF8628-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 PIC18LF8628-I/PT (same form factor and footprint) — differing in ADC, I/O Pins, Package, Program Memory (Flash), Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18LF8723-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF6680-I/PT
✅ Drop-In✓ In Stock
$12.85 / Unit
View Datasheet →PIC18LF8527-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF4585-I/PT
✅ Drop-In✓ In Stock
$6.34 / Unit
View Datasheet →PIC18LF8628-I/PT Maximum Ratings & Electrical Characteristics
| Program Memory (Flash) | 96 KB |
| Data SRAM | 4 KB |
| Data EEPROM | 1024 bytes |
| CPU Core | PIC18 (8-bit enhanced Harvard) |
| Maximum CPU Clock | 40 MHz |
| Operating Voltage (VDD) | 2.0 V to 3.6 V |
| ADC | 12-bit, multi-channel |
| I/O Pins | 70+ (depends on peripheral allocation) |
| Package | TQFP-80 (PT), 12x12 mm |
| Temperature Grade | Industrial (-40C to +85C) |
| Serial Interfaces | 2x USART (LIN-capable), 2x MSSP (SPI/I2C) |
| Timers | Multiple 8/16-bit timers with gate control |
| CCP/ECCP Modules | Yes (Capture/Compare/PWM, Enhanced CCP) |
| Parallel Slave Port | Yes |
| Low-Power Feature | nanoWatt XLP technology |
| In-Circuit Programming | ICSP via 2-wire PGC/PGD |
| RoHS Status | Compliant |
PIC18LF8628-I/PT Pin Configuration
| Pin 1 | OSC1/CLKI/RA7 — Oscillator input / external clock / GPIO port A bit 7 |
| Pin 2 | OSC2/CLKO/RA6 — Oscillator output / GPIO port A bit 6 |
| Pin 3 | RA0/AN0 — GPIO port A bit 0 / ADC input 0 |
| Pin 4 | RA1/AN1 — GPIO port A bit 1 / ADC input 1 |
| Pin 5 | RA2/AN2/VREF- — GPIO port A bit 2 / ADC input 2 / ADC negative reference |
| Pin 6 | RA3/AN3/VREF+ — GPIO port A bit 3 / ADC input 3 / ADC positive reference |
| Pin 7 | RA4/T0CKI — GPIO port A bit 4 / Timer0 clock input |
| Pin 8 | RA5/AN4 — GPIO port A bit 5 / ADC input 4 |
| Pin 9 | RE0/RD — GPIO port E bit 0 / Parallel Slave Port read strobe |
| Pin 10 | RE1/WR — GPIO port E bit 1 / Parallel Slave Port write strobe |
| Pin 11 | RE2/CS — GPIO port E bit 2 / Parallel Slave Port chip select |
| Pin 12 | VDD — Positive supply voltage (2.0-3.6V) |
| Pin 13 | VSS — Ground reference |
| Pin 14 | RB0/INT0/FLT0 — GPIO port B bit 0 / External interrupt 0 / PWM fault input |
| Pin 15 | RB1/INT1 — GPIO port B bit 1 / External interrupt 1 |
| Pin 16 | RB2/INT2 — GPIO port B bit 2 / External interrupt 2 |
| Pin 17 | RB3/INT3 — GPIO port B bit 3 / External interrupt 3 |
| Pin 18 | RB4/KBI0 — GPIO port B bit 4 / Keyboard interrupt 0 |
| Pin 19 | RB5/KBI1 — GPIO port B bit 5 / Keyboard interrupt 1 |
| Pin 20 | RB6/KBI2/PGC — GPIO port B bit 6 / Keyboard interrupt 2 / ICSP clock |
| Pin 21 | RB7/KBI3/PGD — GPIO port B bit 7 / Keyboard interrupt 3 / ICSP data |
| Pin 22 | RC0/T1OSO/T1CKI — GPIO port C bit 0 / Timer1 oscillator output / Timer1 clock |
| Pin 23 | RC1/T1OSI/CCP2 — GPIO port C bit 1 / Timer1 oscillator input / CCP2 |
| Pin 24 | RC2/CCP1 — GPIO port C bit 2 / CCP1 output |
| Pin 25 | RC3/SCK1/SCL1 — GPIO port C bit 3 / MSSP1 SPI clock / I2C clock |
| Pin 26 | RC4/SDI1/SDA1 — GPIO port C bit 4 / MSSP1 SPI data in / I2C data |
| Pin 27 | RC5/SDO1 — GPIO port C bit 5 / MSSP1 SPI data out |
| Pin 28 | RC6/TX1/CK1 — GPIO port C bit 6 / USART1 TX / USART1 clock |
| Pin 29 | RC7/RX1/DT1 — GPIO port C bit 7 / USART1 RX / USART1 data |
| Pin 30 | RD0/PSP0 — GPIO port D bit 0 / Parallel Slave Port data bit 0 |
| Pin 31 | RD1/PSP1 — GPIO port D bit 1 / Parallel Slave Port data bit 1 |
| Pin 32 | RD2/PSP2 — GPIO port D bit 2 / Parallel Slave Port data bit 2 |
| Pin 33 | RD3/PSP3 — GPIO port D bit 3 / Parallel Slave Port data bit 3 |
| Pin 34 | RD4/PSP4 — GPIO port D bit 4 / Parallel Slave Port data bit 4 |
| Pin 35 | RD5/PSP5 — GPIO port D bit 5 / Parallel Slave Port data bit 5 |
| Pin 36 | RD6/PSP6 — GPIO port D bit 6 / Parallel Slave Port data bit 6 |
| Pin 37 | RD7/PSP7 — GPIO port D bit 7 / Parallel Slave Port data bit 7 |
| Pin 38 | VSS — Ground reference |
| Pin 39 | VDD — Positive supply voltage (2.0-3.6V) |
| Pin 40 | RF0/AN5 — GPIO port F bit 0 / ADC input 5 |
| Pin 41 | RF1/AN6 — GPIO port F bit 1 / ADC input 6 |
| Pin 42 | RF2/AN7 — GPIO port F bit 2 / ADC input 7 |
| Pin 43 | RF3/AN8 — GPIO port F bit 3 / ADC input 8 |
| Pin 44 | RF4/AN9 — GPIO port F bit 4 / ADC input 9 |
| Pin 45 | RF5/AN10/CVREF — GPIO port F bit 5 / ADC input 10 / comparator voltage reference |
| Pin 46 | RF6/AN11 — GPIO port F bit 6 / ADC input 11 |
| Pin 47 | RF7/AN12/SS1 — GPIO port F bit 7 / ADC input 12 / MSSP1 SPI slave select |
| Pin 48 | RG0 — GPIO port G bit 0 |
| Pin 49 | RG1 — GPIO port G bit 1 |
| Pin 50 | RG2 — GPIO port G bit 2 |
| Pin 51 | RG3 — GPIO port G bit 3 |
| Pin 52 | RG4 — GPIO port G bit 4 |
| Pin 53 | MCLR/VPP — Master clear reset / programming voltage input |
| Pin 54 | RH0 — GPIO port H bit 0 |
| Pin 55 | RH1 — GPIO port H bit 1 |
| Pin 56 | RH2 — GPIO port H bit 2 |
| Pin 57 | RH3 — GPIO port H bit 3 |
| Pin 58 | RH4 — GPIO port H bit 4 |
| Pin 59 | RH5 — GPIO port H bit 5 |
| Pin 60 | RH6 — GPIO port H bit 6 |
| Pin 61 | RH7 — GPIO port H bit 7 |
| Pin 62 | RJ0 — GPIO port J bit 0 |
| Pin 63 | RJ1 — GPIO port J bit 1 |
| Pin 64 | RJ2 — GPIO port J bit 2 |
| Pin 65 | RJ3 — GPIO port J bit 3 |
| Pin 66 | RJ4 — GPIO port J bit 4 |
| Pin 67 | RJ5 — GPIO port J bit 5 |
| Pin 68 | RJ6 — GPIO port J bit 6 |
| Pin 69 | RJ7 — GPIO port J bit 7 |
| Pin 70 | RK0 — GPIO port K bit 0 |
| Pin 71 | RK1 — GPIO port K bit 1 |
| Pin 72 | RK2 — GPIO port K bit 2 |
| Pin 73 | RK3 — GPIO port K bit 3 |
| Pin 74 | RK4 — GPIO port K bit 4 |
| Pin 75 | RK5 — GPIO port K bit 5 |
| Pin 76 | RK6 — GPIO port K bit 6 |
| Pin 77 | RK7 — GPIO port K bit 7 |
| Pin 78 | VSS — Ground reference |
| Pin 79 | VDD — Positive supply voltage (2.0-3.6V) |
| Pin 80 | AVDD — Analog supply voltage (tie to VDD) |
Typical Applications
PIC18LF8628-I/PT is suitable for 7 applications: Industrial Automation Controller, HVAC Building-Management Panel, Large-Format User-Interface / Keypad Display, Automotive Accessory Module, Point-of-Sale Terminal, Battery-Backed Sensor Aggregator, Smart Home IoT Bridge Node.
Industrial Automation Controller
The PIC18LF8628-I/PT fits industrial automation controllers with its 96 KB Flash for state-machine logic, 4 KB RAM for data buffering, and 70+ I/O pins for sensor-actuator fan-out. The 12-bit ADC handles analog transducer inputs while two USART modules support RS-232/485 Modbus links. The LF 2.0-3.6V supply simplifies 24V-to-3.3V regulator designs common in factory PLC racks.
Recommended
HVAC Building-Management Panel
The PIC18LF8628-I/PT serves HVAC panels because its 96 KB Flash accommodates multi-zone scheduling tables, 1024-byte Data EEPROM retains setpoints across power cycles without external EEPROM, and nanoWatt XLP sleep keeps standby current under 1 uA on battery backup. Multiple CCP modules drive TRIAC phase-angle control for damper actuators and the 12-bit ADC reads thermistor/resistive sensor bridges with 0.1 C resolution.
Recommended
Large-Format User-Interface / Keypad Display
The PIC18LF8628-I/PT drives large keypads and character/graphic displays thanks to its 70+ I/O count, parallel slave port for off-loading display refresh to a host controller, and 4 KB RAM for buffer memory. The MSSP/SPI modules support direct drive of OLED/ST7565 LCD controllers while the 12-bit ADC reads potentiometer/touch sliders. The TQFP-80 footprint gives PCB designers ample GPIO without external I/O expanders.
Recommended
Automotive Accessory Module
The PIC18LF8628-I/PT works in non-safety automotive accessories (interior lighting controllers, seat-heater panels, dash-top displays) using its LIN-capable USART, PWM modules for LED dimming, and wide -40C to +85C industrial temperature grade. Note that for AEC-Q100 automotive-grade certification, designers should pick the PIC18F8628-I/PT automotive variant instead, since the LF8628-I/PT is industrial-grade only.
Recommended
Point-of-Sale Terminal
The PIC18LF8628-I/PT is well-suited to point-of-sale (POS) terminals as the keypad/scanner I/O controller because 96 KB Flash handles multi-protocol command parsers, 4 KB RAM buffers encrypted packets, and 1024-byte Data EEPROM retains merchant-config tables. The 12-bit ADC reads battery telemetry and two USARTs connect to printer and Ethernet modules; nanoWatt XLP keeps backup battery drain minimal.
Recommended
Battery-Backed Sensor Aggregator
The PIC18LF8628-I/PT functions as a battery-backed sensor aggregator where the LF variant's nanoWatt XLP sleep modes drop current to microamp levels between sensor reads, 1024-byte Data EEPROM logs calibration constants across battery swaps, and 4 KB RAM aggregates raw sensor data before transmission via USART or MSSP. The wide 2.0-3.6V VDD lets it run from a single 3.6V lithium primary cell without a boost regulator.
Recommended
Smart Home IoT Bridge Node
The PIC18LF8628-I/PT serves as a smart-home bridge node because its dual USART (LIN-capable) and dual MSSP (SPI/I2C) handle simultaneous sensor and radio links, 96 KB Flash implements Zigbee/Z-Wave/BLE command stacks, and the 12-bit ADC reads analog sensor inputs (lux, gas, thermistor). The TQFP-80 footprint provides enough GPIO to fan out to multiple radio modules plus a TFT display for local status.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF8628-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18LF8723-I/PT | PIC18LF6680-I/PT | PIC18LF8527-I/PT | PIC18LF4585-I/PT |
|---|---|---|---|---|---|
| Package | TQFP-80 (PT) | TQFP-80 (PT) - same | TQFP-80 (PT) - same | TQFP-80 (PT) - same | TQFP-80 (PT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 96 KB | 128 KB (+33%) | 80 KB (-17%) | 48 KB (-50%) | 48 KB (-50%) |
| RAM | 4 KB | 8 KB (+100%) | 2 KB (-50%) | 4 KB (same) | 4 KB (same) |
| Operating Voltage | 2.0V to 3.6V | 2.0V to 3.6V | 2.0V to 3.6V | 2.0V to 3.6V | 2.0V to 3.6V |
| Max Clock | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| ADC | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit |
| Data EEPROM | 1024 bytes | 1024 bytes | 1024 bytes | 1024 bytes | 1024 bytes |
| nanoWatt XLP | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Lowest-voltage LF variant in 80-pin TQFP family (vs PIC18F8628-I/PT)
- Larger Flash and RAM than PIC18LF6680-I/PT sibling (vs PIC18LF6680-I/PT)
- Smaller Flash than PIC18LF8723-I/PT but same TQFP-80 footprint (vs PIC18LF8723-I/PT)
Design Notes
Estimated: at 40 MHz with VDD=3.3V and all peripherals active, typical IDD is approximately 15-20 mA per the PIC18F6x2/8x2 family datasheet. For battery applications, place the MCU in Sleep mode (IDD ~0.1-1 uA with nanoWatt XLP) between sensor reads and use Timer1 with a 32.768 kHz crystal as the wake source. Decouple each VDD/VSS pair with a 100 nF ceramic capacitor within 5 mm of the pin; bulk capacitance of 10 uF is recommended near the regulator output.
Route the ICSP lines PGC (RB6) and PGD (RB7) with short, parallel traces and a 4.7 kohm pull-up on MCLR/VPP to ensure reliable in-circuit programming. Place the 32.768 kHz low-frequency oscillator crystal within 5 mm of OSC1/OSC2 with guard ring to ground. The analog AVSS/AVDD pair should be star-routed back to a clean reference point and decoupled separately from digital VDD.
Configuration bits must be set correctly: enable the internal oscillator only if external clocking is not used, and disable the watchdog timer if not required by application logic (or enable WDT with a long postscaler). Forgetting to set CONFIG3L's voltage regulator configuration can cause intermittent brown-out reset behavior. Always include a 4.7 kohm pull-up on MCLR and a series resistor on PGD/PGC to limit inrush current during ICSP. Data EEPROM write endurance is rated for 100,000 erase/write cycles - implement firmware wear-leveling for parameter logs.
Compliance Information
RoHS and lead-free compliant per Microchip product page; conflict minerals statement filed November 2018 per package change PCN. Industrial temperature grade only - not AEC-Q100 qualified.