PIC18LF6627T-I/PT - 96KB Flash 8-bit MCU 40MHz TQFP-64 | Microchip
MPN: PIC18LF6627T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $10.8 | $10.80 |
| 10 | $9.95 | $99.50 |
| 100 | $9.1 | $910.00 |
| 500 | $8.5 | $4,250.00 |
| 1,000 | $7.85 | $7,850.00 |
PIC18LF6627T-I/PT Overview
A PIC microcontroller is a family of low-power, high-reliability 8-/16-/32-bit RISC microcontrollers built around Microchip's proprietary Harvard architecture. PIC18F-class devices sit in the upper tier of the 8-bit PIC portfolio, offering enhanced 16-bit-wide instruction words, linear program memory addressing up to 2 MB, a hardware multiply engine, C-compiler-friendly architecture, and rich on-chip peripherals. They function as the application's main control core - executing firmware, sampling sensors, driving actuators, and communicating with peripheral ICs over UART, SPI, I2C, USB, or CAN.
Key features of the PIC18LF6627 include 70 I/O pins (giving wide parallel bus or matrix-keypad headroom), a 10-bit ADC with up to 16 channels, multiple PWM modules, two enhanced USART modules, MSSP (SPI/I2C), a 16-bit timer/cascade, a CTMU charge-time measurement unit, an RTCC with timestamp functionality, and an on-chip 1% internal oscillator for BOM-cost reduction. The device supports In-Circuit Serial Programming (ICSP) and In-Circuit Debug (ICD) via two pins, allowing firmware updates in the field without removing the MCU.
Architecture-wise the PIC18LF6627 uses the standard PIC18 16-bit modified-Harvard core with a hardware stack, a single-cycle ALU, and table-read/table-write Flash access. The 64-pin TQFP gives access to virtually every peripheral simultaneously - critical for designs that need both a parallel external memory bus and multiple serial channels.
Typical applications include industrial control panels, HVAC and building automation gateways, automotive body and infotainment nodes, USB peripherals, sensor aggregators, medical monitoring devices, and consumer appliances. The wide voltage range plus industrial temperature grade makes it equally suitable for outdoor, factory-floor, and battery-powered portable products.
When designing with this part, allocate a 10 nF + bulk decoupling pair per power pin, place a 4.7 kohm pull-up on MCLR if not driven by a supervisor, and reserve the ICSPDAT/ICSPCLK pins for the programming/debug header - even on production boards. The LF variant is interchangeable with the F variant when VDD does not exceed 5.5 V, giving flexibility to switch F/LF based on inventory.
This page synthesizes distributor pricing, drop-in alternatives, parameter comparisons, and practical design notes not aggregated in the manufacturer datasheet alone.
Drop-in alternatives for PIC18LF6627T-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 PIC18LF6627T-I/PT (same form factor and footprint) — differing in Core Architecture, I/O Pins, Package, Program Memory (Flash), Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18LF6627-I/PT
✅ Drop-In✓ In Stock
$8.2 / Unit
View Datasheet →PIC18LF6622T-I/PT
✅ Drop-In✓ In Stock
$5.96 / Unit
View Datasheet →PIC18LF8722T-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF6627T-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 (8-bit RISC Harvard) |
| Program Memory (Flash) | 96 KB (48K x 16) |
| Data RAM | 4 KB |
| EEPROM | 1 KB |
| Maximum CPU Frequency | 40 MHz |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| I/O Pins | 70 (multiplexed) |
| A/D Converter | 10-bit, up to 16 channels |
| PWM Modules | Yes (multiple CCP/ECCP) |
| USART | 2x Enhanced USART |
| MSSP (SPI/I2C) | Yes |
| Timers | Multiple 8-bit and 16-bit |
| Internal Oscillator | 31 kHz + 8 MHz selectable (1% accuracy) |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 64-pin TQFP (PT), 10x10 mm |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| Lead-Free / RoHS | Yes (lead-free, RoHS compliant) |
| ICSP / ICD | Yes (2-wire) |
| Operating Voltage Rails Supported | 2.5 V / 3.3 V / 5 V |
PIC18LF6627T-I/PT Pin Configuration
| Pin 1 | RF0 — Digital I/O / analog input |
| Pin 2 | RF1 — Digital I/O / analog input |
| Pin 3 | RF2 — Digital I/O / analog input |
| Pin 4 | RF3 — Digital I/O / analog input |
| Pin 5 | RF4 — Digital I/O / analog input |
| Pin 6 | RF5 — Digital I/O / analog input |
| Pin 7 | RF6 — Digital I/O / analog input |
| Pin 8 | RF7 — Digital I/O / analog input |
| Pin 9 | RG0 — Digital I/O |
| Pin 10 | RG1 — Digital I/O |
| Pin 11 | RG2 — Digital I/O |
| Pin 12 | RG3 — Digital I/O |
| Pin 13 | MCLR — Master Clear / Reset input |
| Pin 14 | OSC1 — Crystal oscillator input |
| Pin 15 | OSC2 — Crystal oscillator output |
| Pin 16 | RA0 — Digital I/O / analog input |
| Pin 17 | RA1 — Digital I/O / analog input |
| Pin 18 | RA2 — Digital I/O / analog input |
| Pin 19 | RA3 — Digital I/O / analog input |
| Pin 20 | RA4 — Digital I/O / analog input |
| Pin 21 | RA5 — Digital I/O / analog input |
| Pin 22 | VDD — Power supply + |
| Pin 23 | VSS — Ground |
| Pin 24 | RA6 — Digital I/O / analog input |
| Pin 25 | RA7 — Digital I/O / analog input |
| Pin 26 | RB0 — Digital I/O / interrupt-on-change |
| Pin 27 | RB1 — Digital I/O / interrupt-on-change |
| Pin 28 | RB2 — Digital I/O / interrupt-on-change |
| Pin 29 | RB3 — Digital I/O / interrupt-on-change |
| Pin 30 | RB4 — Digital I/O / interrupt-on-change |
| Pin 31 | RB5 — Digital I/O / interrupt-on-change |
| Pin 32 | RB6 — Digital I/O / ICSP clock |
| Pin 33 | RB7 — Digital I/O / ICSP data |
| Pin 34 | RC0 — Digital I/O |
| Pin 35 | RC1 — Digital I/O |
| Pin 36 | RC2 — Digital I/O |
| Pin 37 | RC3 — Digital I/O |
| Pin 38 | RD0 — Digital I/O |
| Pin 39 | RD1 — Digital I/O |
| Pin 40 | RD2 — Digital I/O |
| Pin 41 | RD3 — Digital I/O |
| Pin 42 | RC4 — Digital I/O |
| Pin 43 | RC5 — Digital I/O |
| Pin 44 | RC6 — Digital I/O / TX |
| Pin 45 | RC7 — Digital I/O / RX |
| Pin 46 | RD4 — Digital I/O |
| Pin 47 | RD5 — Digital I/O |
| Pin 48 | RD6 — Digital I/O |
| Pin 49 | RD7 — Digital I/O |
| Pin 50 | VSS — Ground |
| Pin 51 | VDD — Power supply + |
| Pin 52 | RE0 — Digital I/O / analog input |
| Pin 53 | RE1 — Digital I/O / analog input |
| Pin 54 | RE2 — Digital I/O / analog input |
| Pin 55 | RE3 — Digital I/O / analog input |
| Pin 56 | RE4 — Digital I/O / analog input |
| Pin 57 | RE5 — Digital I/O / analog input |
| Pin 58 | RE6 — Digital I/O / analog input |
| Pin 59 | RE7 — Digital I/O / analog input |
| Pin 60 | VSS — Ground |
| Pin 61 | VDD — Power supply + |
| Pin 62 | RG4 — Digital I/O |
| Pin 63 | RH0 — Digital I/O / analog input |
| Pin 64 | RH1 — Digital I/O / analog input |
Typical Applications
PIC18LF6627T-I/PT is suitable for 6 applications: Industrial Control Panels, Building Automation Gateways, Automotive Body & Infotainment Nodes, USB Peripherals and HIDs, Medical Monitoring Devices, Sensor Aggregators and IoT Edge Nodes.
Industrial Control Panels
The PIC18LF6627T-I/PT suits industrial control panels requiring up to 70 I/O lines for keypad, LCD, relay drivers and sensor inputs. Its 96 KB Flash hosts large protocol stacks (Modbus RTU, CANopen) plus HMI logic, while 4 KB RAM keeps message buffers and LCD framebuffers in chip. The 10-bit ADC with 16 channels reads multiple analog sensor signals simultaneously, and 2.0-5.5 V operation tolerates noisy 24 V-derived rails after regulation. Compared with smaller PIC18F variants, this part's memory headroom removes the need for an external EEPROM and simplifies BOM.
Recommended
Building Automation Gateways
Building automation gateways aggregate BACnet, Modbus or LonWorks traffic from HVAC, lighting and access-control subsystems. The PIC18LF6627T-I/PT's two enhanced USARTs handle RS-485 trunks at 1 Mbps while MSSP serves an I2C sensor bus. The 70 I/O drive LCD keypads, LEDs and dry-contact relays directly. Industrial -40C to +85C temperature grade supports unconditioned mechanical rooms. The wide 2.0-5.5 V supply lets the same board run from 3.3 V sensor power or 5 V relay power, simplifying dual-voltage designs.
Recommended
Automotive Body & Infotainment Nodes
Body control modules, mirror controllers, instrument-cluster nodes and infotainment sub-modules benefit from the PIC18LF6627T-I/PT's automotive cousin PIC18LF6627T-I/PT (industrial grade here, with AEC-Q100 grade available as PIC18F6627-I/PT). 70 I/O drive indicator LEDs, switches, motors and LIN/CAN buses. The CTMU charge-time measurement unit enables capacitive touch keys for door handles and infotainment sliders. 96 KB Flash stores bootloader plus full feature firmware; 4 KB RAM serves CAN/LIN mailbox buffers. Wide voltage tolerance handles cranking transients down to 4.0 V nominal.
Recommended
USB Peripherals and HIDs
The PIC18LF6627T-I/PT hosts USB Full-Speed device firmware stacks for HID-class peripherals such as custom keyboards, pointer devices, audio controls and measurement instruments. The on-chip USB SIE (where present on the LF66xx sub-family) plus 96 KB Flash holds USB stack, class descriptors and application logic. 70 I/O scan matrices up to 8x8 for keypads. The industrial temperature range keeps the part working in automotive and outdoor environments. Compared with smaller PIC16F variants, the LF6627 eliminates external RAM for descriptor buffering.
Recommended
Medical Monitoring Devices
Patient monitors, infusion pumps and portable diagnostic tools benefit from the PIC18LF6627T-I/PT's 96 KB Flash for protocol stacks (Bluetooth command sets, USB CDC, custom RF), 4 KB RAM for sample buffers, and 16-channel 10-bit ADC for multi-signal acquisition. The LF variant's 2.0 V rail supports single-cell Li-ion designs without boost converters. Industrial -40C to +85C operation covers hospital, ambulatory and home environments. The CTMU enables accurate temperature, capacitance and pulse-oximetry front-end measurements.
Recommended
Sensor Aggregators and IoT Edge Nodes
IoT edge nodes aggregate sensor traffic from I2C, SPI and analog sources and forward via UART, USB or radio. The PIC18LF6627T-I/PT runs a TCP/IP-over-UART or LoRaWAN stack in 96 KB Flash, with 4 KB RAM for socket buffers and 70 I/O to host many sensor breakouts. The 2.0-5.5 V range lets the node share a coin-cell or USB-derived supply. The PIC18LF6627T-I/PT's low-power sleep modes and CTMU wake-on-touch add useful energy-saving features for battery deployments. Compared with ESP-class parts, the PIC18 has a far more deterministic interrupt latency and -40C to +85C industrial range.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF6627T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18LF6627-I/PT | PIC18LF6622T-I/PT | PIC18LF8722T-I/PT |
|---|---|---|---|---|
| Package | TQFP-64 (PT) | TQFP-64 (PT) - same | TQFP-64 (PT) - same | TQFP-80 (PT) - different, larger |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 96 KB | 96 KB | 64 KB | 128 KB |
| RAM | 4 KB | 4 KB | 3.8 KB | 3.8 KB |
| I/O Pins | 70 | 70 | 70 | 70 (80-pin package) |
| CPU Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Supply Voltage | 2.0 - 5.5 V | 2.0 - 5.5 V | 2.0 - 5.5 V | 2.0 - 5.5 V |
| A/D Channels | 16 x 10-bit | 16 x 10-bit | 16 x 10-bit | 16 x 10-bit |
Key Differentiators
- Highest Flash density in the LF662x family (vs PIC18LF6622T-I/PT)
- Most I/O pins in a 64-pin TQFP (vs PIC18LF46K22)
- Industrial -40C to +85C temperature range with automotive cousin available (vs consumer-grade PIC16F variants)
Design Notes
Place a 100 nF ceramic decoupling capacitor as close as possible to every VDD/VSS pair (4 pairs total on this 64-pin TQFP). Add a single 10 uF bulk capacitor near the package. Estimated: with 70 I/O pins each toggling 5 pF at 10 MHz, dynamic current peaks can reach 35 mA; the bulk cap absorbs these spikes. Keep analog VDD/VSS (AVDD/AVSS) tied to the digital rails through a ferrite bead on analog designs.
Route ICSPDAT (RB7) and ICSPCLK (RB6) directly to a 2x3 or 1x6 programming header on every production board - even field-deployed units - so firmware updates never require board removal. Keep the trace length under 50 mm and surround them with ground. Route the 32.768 kHz crystal traces short and symmetric, with a ground guard ring, to maintain RTCC accuracy within +/- 2 minutes per month per Microchip PIC18F6627 datasheet DS39746F.
Do not leave MCLR floating - tie to VDD through a 4.7 kohm resistor or drive it from a dedicated supervisor. Always configure CONFIG registers (#pragma config) for the brown-out reset, watchdog timer and oscillator mode BEFORE the main code starts; missing CONFIG settings can lock the MCU on a bad oscillator at power-up. Estimated: a missing BOR setting can cause ~1 in 1000 boards to fail to start on slow-rising supplies.
When using the MSSP in I2C mode with bus speeds above 400 kHz, add 4.7 kohm pull-ups on SDA/SCL and keep total bus capacitance below 200 pF. For SPI peripherals running above 10 MHz, series-terminate SCK/MOSI with 33 ohm resistors near the source. The PIC18LF6627T-I/PT does not have internal pull-ups on every pin - check the pin map for RB0-RB5 which have weak pull-ups only.
Compliance Information
RoHS compliant per Microchip product page; lead-free TQFP package. The LF variant is industrial-grade -40C to +85C; for AEC-Q100 qualified automotive use, choose PIC18F6627-I/PT or PIC18LF6627T-I/PTQ1.
