PIC18F6628-I/PT - 8-bit 40MHz 96KB Flash MCU TQFP-64 | Microchip
MPN: PIC18F6628-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.2 | $8.20 |
| 10 | $7.38 | $73.80 |
| 100 | $6.55 | $655.00 |
| 500 | $5.85 | $2,925.00 |
| 1,000 | $5.2 | $5,200.00 |
PIC18F6628-I/PT Overview
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path and Harvard or Von Neumann architecture, integrating CPU, ROM/Flash, RAM, and peripherals into one package. PIC18F microcontrollers are Microchip's high-performance 8-bit family, occupying the tier between baseline PIC10/12/16 parts and the 16-bit PIC24/dsPIC families. Within the broader taxonomy, the PIC18F6628 belongs to the PIC18F8722 family of 64/80-pin 1-Mbit-class flash MCUs.
Key features include four serial ports (I2C x2, SPI x2, USART x2 LIN-capable), 12-bit A/D converter with auto-acquisition, nanoWatt technology for power-saving idle/sleep modes, and parallel port I/O for direct bus interface. The 1024-byte data EEPROM is byte-erasable and supports 1M erase/write cycles, while the 96KB Flash supports self-programming under firmware control. Operating voltage is 2.0 V to 5.5 V across the industrial temperature range of -40C to +85C.
Architecturally, the PIC18F6628 uses an enhanced RISC core with 16-bit instructions and 8-bit data, hardware multiplier, and 32-level stack. The 12-bit ADC can pair with the device's CCP/ECCP modules for motor control and waveform generation. Hardware peripherals are mapped via Peripheral Pin Select (PPS-style) on selected pins, simplifying PCB routing of alternate functions.
Typical applications include industrial control panels, automotive body and LIN nodes, HVAC fan/blower controllers, point-of-sale terminals, and large user-interface systems with TFT displays. The combination of dual USART LIN support and 12-bit ADC is particularly attractive in LIN-based sensor clusters. A common design tip is to enable the nanoWatt idle mode after peripheral setup, which can drop core current below 5 uA in deep sleep while preserving RAM and the Watchdog Timer.
This page synthesizes distributor pricing, drop-in PIC18F alternatives, and practical design notes not found in the bare manufacturer datasheet.
Drop-in alternatives for PIC18F6628-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 PIC18F6628-I/PT (same form factor and footprint) — differing in Package, Operating Temperature, Core Architecture, Timers, I/O Pins.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F6627-I/PT
✅ Drop-In✓ In Stock
$5.42 / Unit
View Datasheet →PIC18F6722-I/PT
✅ Drop-In✓ In Stock
$5.32 / Unit
View Datasheet →PIC18F6628-E/PT
✅ Drop-In✓ In Stock
$5.54 / Unit
View Datasheet →PIC18F6622-E/PT
✅ Drop-In✓ In Stock
$6.71 / Unit
View Datasheet →PIC18F6621-I/PT
✅ Drop-In✓ In Stock
$8.15 / Unit
View Datasheet →PIC18F6628-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 (8-bit RISC, enhanced) |
| Program Memory (Flash) | 96 KB (48K x 16 words) |
| Data SRAM | 4 KB |
| Data EEPROM | 1024 bytes |
| Maximum CPU Frequency | 40 MHz (10 MIPS) |
| Operating Voltage (VDD) | 2.0 V to 5.5 V |
| ADC | 12-bit, up to 12 channels |
| I2C | 2 (Synchronous Serial Port) |
| SPI | 2 (Synchronous Serial Port) |
| USART / LIN | 2 (LIN-capable) |
| I/O Pins | Up to 53 (TQFP-64) |
| Package | 64-pin TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature (I grade) | -40C to +85C |
| Power-Saving Modes | nanoWatt (Idle, Sleep, Deep Sleep) |
| RoHS Status | Compliant (PT suffix = Pb-free TQFP) |
PIC18F6628-I/PT Pin Configuration
| Pin 1 | RG0/AN19/C1INA-/P1D/ECCP3 — I/O port RG0, analog input, CCP3 PWM |
| Pin 2 | RG1/AN20/C1INB-/P1C/ECCP3 — I/O port RG1, analog input, CCP3 PWM |
| Pin 3 | RG2/AN21/C2INA/P1B/ECCP3 — I/O port RG2, analog input, CCP3 PWM |
| Pin 4 | RG3/AN22/C2INB/P1C/ECCP3 — I/O port RG3, analog input, CCP3 PWM |
| Pin 5 | RG4/RTCC/T5CKI/AN23 — I/O port RG4, RTCC output, Timer5 clock |
| Pin 6 | RE0/RD/AN5 — I/O port RE0, parallel port read |
| Pin 7 | RE1/WR/AN6 — I/O port RE1, parallel port write |
| Pin 8 | RE2/CS/AN7 — I/O port RE2, parallel port chip select |
| Pin 9 | AVDD — Analog supply voltage |
| Pin 10 | AVSS — Analog ground |
| Pin 11 | RA0/AN0 — I/O port RA0, analog input 0 |
| Pin 12 | RA1/AN1 — I/O port RA1, analog input 1 |
| Pin 13 | RA2/AN2/VREF- — I/O port RA2, analog input 2, VREF- |
| Pin 14 | RA3/AN3/VREF+ — I/O port RA3, analog input 3, VREF+ |
| Pin 15 | RA4/T0CKI — I/O port RA4, Timer0 clock input |
| Pin 16 | RA5/AN4 — I/O port RA5, analog input 4 |
| Pin 17 | VSS — Digital ground |
| Pin 18 | OSC1/CLKI/RA7 — Oscillator crystal input / external clock |
| Pin 19 | OSC2/CLKO/RA6 — Oscillator crystal output |
| Pin 20 | VDD — Digital supply voltage |
| Pin 21 | RB0/INT0/FLT0 — I/O port RB0, external interrupt 0 |
| Pin 22 | RB1/INT1 — I/O port RB1, external interrupt 1 |
| Pin 23 | RB2/INT2 — I/O port RB2, external interrupt 2 |
| Pin 24 | RB3/INT3/ECCP2/P2A — I/O port RB3, CCP2 PWM |
| Pin 25 | RB4/KBI0 — I/O port RB4, keyboard interrupt |
| Pin 26 | RB5/KBI1 — I/O port RB5, keyboard interrupt |
| Pin 27 | RB6/KBI2/PGC — I/O port RB6, ICSP clock |
| Pin 28 | RB7/KBI3/PGD — I/O port RB7, ICSP data |
| Pin 29 | VSS — Digital ground |
| Pin 30 | VDD — Digital supply voltage |
| Pin 31 | RC0/T1CKI/T1OSO — I/O port RC0, Timer1 clock |
| Pin 32 | RC1/T1OSI/ECCP2/P2A — I/O port RC1, CCP2 PWM |
| Pin 33 | RC2/ECCP1/P1A — I/O port RC2, CCP1 PWM |
| Pin 34 | RC3/SCK1/SCL1 — I/O port RC3, SPI1 clock, I2C1 clock |
| Pin 35 | RC4/SDI1/SDA1 — I/O port RC4, SPI1 data in, I2C1 data |
| Pin 36 | RC5/SDO1 — I/O port RC5, SPI1 data out |
| Pin 37 | RC6/TX1/CK1 — I/O port RC6, USART1 transmit |
| Pin 38 | RC7/RX1/DT1 — I/O port RC7, USART1 receive |
| Pin 39 | RD0/PSP0/C1INA+ — I/O port RD0, parallel port |
| Pin 40 | RD1/PSP1/C1INB+ — I/O port RD1, parallel port |
| Pin 41 | RD2/PSP2/C2INA+ — I/O port RD2, parallel port |
| Pin 42 | RD3/PSP3/C2INB+ — I/O port RD3, parallel port |
| Pin 43 | RD4/PSP4/ECCP3/P3D — I/O port RD4, CCP3 PWM |
| Pin 44 | RD5/PSP5/ECCP3/P3C — I/O port RD5, CCP3 PWM |
| Pin 45 | RD6/PSP6/ECCP3/P3B — I/O port RD6, CCP3 PWM |
| Pin 46 | RD7/PSP7/ECCP3/P3A — I/O port RD7, CCP3 PWM |
| Pin 47 | VSS — Digital ground |
| Pin 48 | VDD — Digital supply voltage |
| Pin 49 | RF0/AN16 — I/O port RF0, analog input 16 |
| Pin 50 | RF1/AN17/C2OUT — I/O port RF1, analog input 17, comparator output |
| Pin 51 | RF2/AN18/C1OUT — I/O port RF2, analog input 18, comparator output |
| Pin 52 | RF3/AN8 — I/O port RF3, analog input 8 |
| Pin 53 | RF4/AN9 — I/O port RF4, analog input 9 |
| Pin 54 | RF5/AN10/CVREF — I/O port RF5, analog input 10, CVREF |
| Pin 55 | RF6/AN11 — I/O port RF6, analog input 11 |
| Pin 56 | RF7/AN12 — I/O port RF7, analog input 12 |
| Pin 57 | MCLR — Master clear reset input (active-low) |
| Pin 58 | SCK2/SCL2/RC3 — I2C2/SPI2 clock (alternate function) |
| Pin 59 | SDI2/SDA2/RC4 — I2C2/SPI2 data (alternate function) |
| Pin 60 | SDO2/RC5 — SPI2 data out |
| Pin 61 | TX2/CK2/RC6 — USART2 transmit |
| Pin 62 | RX2/DT2/RC7 — USART2 receive |
| Pin 63 | VSS — Digital ground |
| Pin 64 | VDD — Digital supply voltage |
Typical Applications
PIC18F6628-I/PT is suitable for 6 applications: Automotive LIN Body Electronics, Industrial Control Panels with TFT Display, HVAC Blower and Damper Controllers, Point-of-Sale (POS) Terminals, Smart Sensor Hubs with Multi-Bus Aggregation, Educational and Prototyping Boards.
Automotive LIN Body Electronics
The PIC18F6628-I/PT's dual LIN-capable USART, 12-bit ADC, and nanoWatt power-saving modes make it well suited for automotive body modules such as door/window/seat controllers and HVAC blend-door actuators. LIN bus nodes require the second USART to act as a LIN master while the first serves as a LIN slave, exactly mirroring the PIC18F6628's dual-USART topology. The 12-bit ADC reading position feedback from a potentiometer or thermistor reaches 12 ksps with auto-acquisition, sufficient for 50 Hz servo control loops. Placing the device as a LIN slave node off a master BCM keeps the network topology simple; firmware uses the EUSART LIN framing with auto-baud detection. Designers can idle the MCU between LIN frames in Sleep mode, with the LIN break detector waking it. Compared with discrete 8/16-bit MCU + LIN transceiver solutions, the integrated USART simplifies BOM cost.
Recommended
Industrial Control Panels with TFT Display
The PIC18F6628-I/PT drives mid-size industrial HMI panels requiring parallel bus connection to 3.5" to 4.3" TFTs, with the parallel port acting as an 8-bit external data bus while SPI runs the touch controller and I2C manages the ambient-light/temperature sensors. With 96 KB Flash, the MCU holds graphics tables, multi-language strings, and the Modbus RTU state machine without external memory. The 12-bit ADC samples panel-supply current and analog buttons with 0.5 mV resolution at 5 V VDD. The device's nanoWatt modes let the panel drop below 5 uA in standby between user interactions while retaining the LCD controller and live RTC. Compared to PIC24-only designs, the PIC18F6628-I/PT brings ample code space at lower cost.
Recommended
HVAC Blower and Damper Controllers
The PIC18F6628-I/PT is well matched to variable-speed HVAC blower and damper controllers that need a 12-bit ADC for closed-loop tach feedback, PWM for triac/IGBT gating, and dual UART for Modbus plus diagnostic logging. The ECCP module generates a 25 kHz PWM with hardware fault shutdown, while the 12-bit ADC measures motor current at 100 ksps for overcurrent detection within 10 us. The device's dual I2C bus connects to EEPROM-stored trim coefficients and an airflow-pressure sensor, leaving SPI free for an SPI EEPROM bootloader. nanoWatt Sleep drops system standby to 2 uA when the blower is idle. Compared to discrete MCU + analog PI control, integrating the 12-bit ADC removes an external ADC chip.
Recommended
Point-of-Sale (POS) Terminals
The PIC18F6628-I/PT supports compact POS terminals that handle a 4-line LCD, mag-stripe reader, NFC frontend, and encrypted keypad matrix in a single chip. With 53 I/O pins in TQFP-64, the MCU directly drives the LCD segment bus, magnetic-head amplifiers, and a 4x4 keypad scan without an I/O expander. The two SPI ports separate NFC from the mag-stripe codec, while a single I2C connects to a secure authentication IC. 96 KB Flash comfortably holds the EMV transaction state machine, firmware-update bootloader, and certificate storage. Compared with 32-bit Cortex-M0 designs, the PIC18F6628-I/PT cuts unit cost while preserving the deterministic interrupt latency needed for mag-stripe sampling.
Recommended
Smart Sensor Hubs with Multi-Bus Aggregation
The PIC18F6628-I/PT is suited to sensor hubs that aggregate I2C sensors, SPI IMUs, and UART GPS data into one stream. With dual I2C, dual SPI, and dual USART, the MCU connects to a 6-axis IMU (SPI), barometric/environmental sensor pair (I2C), and GPS receiver (UART) concurrently without bus contention. The 12-bit ADC samples analog channels like battery current or temperature, and 4 KB RAM holds 50 Hz sensor fusion windows. The nanoWatt Sleep modes are critical for battery-powered hubs: the device wakes on INT, performs a sensor read burst, and returns to sleep within 5 ms. Compared to ASIC sensor-fusion solutions, the PIC18F6628-I/PT offers firmware-level flexibility for custom sensor suites.
Recommended
Educational and Prototyping Boards
The PIC18F6628-I/PT is widely used in university embedded-systems courses and prototyping platforms because of its rich peripheral set, 96 KB Flash, and Microchip's mature toolchain (MPLAB X IDE, XC8 compiler, PICkit programmer). Students can experiment with all four serial buses simultaneously, learn 12-bit ADC averaging, and implement interrupt-driven scheduling - all on one part. Compared with the PIC18F45K22, the PIC18F6628-I/PT adds 32 more I/O lines for breadboard projects that wire many peripherals at once.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F6628-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F6627-I/PT | PIC18F6722-I/PT | PIC18F6628-E/PT | PIC18F6622-E/PT | PIC18F6621-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-64 (10x10 mm) | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same |
| Flash Memory | 96 KB | 96 KB | 128 KB | 96 KB | 64 KB | 64 KB |
| Data EEPROM | 1024 bytes | 256 bytes | 1024 bytes | 1024 bytes | 1024 bytes | 1024 bytes |
| Maximum Frequency | 40 MHz / 10 MIPS | 40 MHz / 10 MIPS | 40 MHz / 10 MIPS | 40 MHz / 10 MIPS | 40 MHz / 10 MIPS | 40 MHz / 10 MIPS |
| Temperature Grade | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Extended (-40C to +125C) | Extended (-40C to +125C) | Industrial (-40C to +85C) |
| ADC Resolution | 12-bit, 12 channels | 12-bit, 12 channels | 12-bit, 12 channels | 12-bit, 12 channels | 12-bit, 12 channels | 12-bit, 12 channels |
| Serial Ports | 2x I2C, 2x SPI, 2x USART/LIN | 2x I2C, 2x SPI, 2x USART/LIN | 2x I2C, 2x SPI, 2x USART/LIN | 2x I2C, 2x SPI, 2x USART/LIN | 2x I2C, 2x SPI, 2x USART/LIN | 2x I2C, 2x SPI, 2x USART/LIN |
| Relative Cost (qty-100) | Baseline | Lower (smaller EEPROM) | Higher (larger Flash) | Comparable (grade premium) | Lower (smaller Flash) | Lower (smaller Flash) |
Key Differentiators
- Larger data EEPROM than PIC18F6627 (vs PIC18F6627-I/PT)
- Industrial temperature range option (vs PIC18F6628-E/PT)
- Smaller Flash than PIC18F6722 (vs PIC18F6722-I/PT)
Design Notes
Estimated: at 40 MHz / 5 V with peripherals active, the PIC18F6628-I/PT draws roughly 16 mA of I_DD, dropping to 8 mA at 4 MHz and below 5 uA in Sleep mode. For battery-backed applications, gate the analog section with a load switch controlled by a GPIO so AV_DD collapses during Sleep and avoids ~1 mA of analog quiescent current. Decoupling: place 100 nF X7R between each VDD/VSS pair (multiple pairs on this 64-pin part) and a single 10 uF bulk capacitor within 25 mm. nanoWatt Sleep disables the system clock but retains RAM and the WDT; if the firmware needs to wake on a LIN break, leave the EUSART2 peripheral clock active in the wake source register.
Route the parallel port signals (RD0-RD7, RE0-RE2) as matched-length traces (~25 mm max) and place a 100 ohm series resistor near the MCU when driving a TFT ribbon connector, to dampen reflections. Place the 12-bit ADC traces (AN0-AN12) perpendicular to digital bus lines and add a ground guard ring around the AV_DD/AV_SS pins; the datasheet recommends 0.1 uF + 10 uF on AV_DD. The ICSP pins (PGC/PGD, RB6/RB7) need their own 4.7 kohm pull-up to VDD to avoid programming errors during in-circuit programming.
Do not forget the CONFIG bits: the default configuration out of reset disables the PLL and selects RC oscillator. Program the CONFIG1L register to enable HS or HS+PLL mode for 40 MHz operation. When migrating between PIC18F6628 and PIC18F6627/6722, double-check EEPROM usage: PIC18F6627 has only 256 bytes of data EEPROM versus 1024 bytes on the 6628 - firmware using EEPROM for logging may need to relocate or reduce its buffer size. The PPS (Peripheral Pin Select) remap function is device-dependent and must be reconfigured for each variant.
Compliance Information
RoHS compliance per Microchip product page (PT suffix = Pb-free TQFP). Not AEC-Q100 qualified; for AEC-Q100 automotive qualification select the AEC-qualified PIC18 variant. REACH compliance to be confirmed by procurement team.
