PIC16F1778T-I/MX - 8-bit MCU, 28KB Flash, 32MHz | Microchip
MPN: PIC16F1778T-I/MX β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.1 | $3.10 |
| 10 | $2.78 | $27.80 |
| 100 | $2.42 | $242.00 |
| 500 | $2.1 | $1,050.00 |
| 1,000 | $1.85 | $1,850.00 |
PIC16F1778T-I/MX Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, working RAM, and a rich set of on-chip peripherals including timers, ADC, communication interfaces, and digital I/O. Within the broader power management and embedded control hierarchy, an 8-bit MCU like the PIC16F1778 occupies the supervisory node that closes the loop on analog signals, drives PWM channels, and hosts user firmware. The '16F' prefix denotes flash program memory and the PIC16 enhanced mid-range architecture with 200ns instruction execution, balancing deterministic interrupt latency with ample code density.
Key differentiating specifications include 2KB of RAM, a 10-bit ADC, multiple PWM/capture/compare peripherals and the PIC XLP (eXtreme Low Power) sleep-mode architecture that lets this part enter deep sleep currents measured in the nanoamp range. The 28-UQFN (6x6 mm) 'MX' package provides a small PCB footprint with an exposed thermal pad suited to compact industrial modules and consumer electronics where board area is at a premium. The 'T' infix indicates tape-and-reel packaging for high-volume SMT assembly, and the 'I' suffix marks the industrial -40C to +85C operating temperature grade.
Architecturally the PIC16F1778 combines the 14-bit instruction word with a peripheral set that includes operational amplifiers, comparators, slope compensation hardware and configurable logic cells, enabling power-conversion and lighting firmware to run without external analog components. The combination of a 32MHz FOSC, 28KB flash, and dedicated analog peripherals positions the device for digital LED drivers, LLC/Sepic control loops and battery-fuel-gauge co-processors.
Typical applications span LED lighting ballasts, AC-DC and DC-DC converter control loops, BLDC and brushed motor control, solar charge controllers and general-purpose industrial sensor hubs. Designers benefit from the free MPLAB X IDE and XC8 toolchain support, plus Microchip's application libraries for Class-D audio, lighting and power-supply reference designs.
When designing with this device, allocate at least 1 square inch of copper for thermal relief under the UQFN exposed pad and follow Microchip's decoupling guidance of a 100nF + 10uF pair within 3mm of the VDD pins. Programming via ICSP requires dedicated RB6/RB7 pin access, so do not reassign these in the PCB layout.
This page consolidates distributor pricing, drop-in same-family alternatives and practical design notes that go beyond the manufacturer datasheet summary.
Drop-in alternatives for PIC16F1778T-I/MX β 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 PIC16F1778T-I/MX (same form factor and footprint) β differing in Core Architecture, Package, ADC, DAC, Data Memory (RAM).
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Request AlternativesPIC16F1778T-I/MX Maximum Ratings & Electrical Characteristics
| Product Family | PIC16(L)F177X |
| Core Architecture | 8-bit PIC enhanced mid-range |
| CPU Speed (FOSC) | 32 MHz (200 ns instruction cycle) |
| Program Memory (Flash) | 28 KB (16K x 14 words) |
| Data Memory (RAM) | 2 KB |
| ADC | 10-bit |
| Package | 28-UQFN (MX), 6x6 mm |
| Mounting Type | Surface Mount |
| Pin Count | 28 |
| Operating Temperature | -40 C to +85 C (Industrial) |
| RoHS Status | Compliant |
| Reel / Tape | Tape & Reel (T suffix) |
| Peripheral Highlights | Op amps, comparators, slope compensation, configurable logic, PWM |
PIC16F1778T-I/MX Pin Configuration
| Pin 1 | RA0/AN0 β Analog input 0 / digital I/O RA0 |
| Pin 2 | RA1/AN1 β Analog input 1 / digital I/O RA1 |
| Pin 3 | RA2/AN2 β Analog input 2 / digital I/O RA2 |
| Pin 4 | RA3/AN3 β Analog input 3 / digital I/O RA3 |
| Pin 5 | RA4/AN4 β Analog input 4 / digital I/O RA4 |
| Pin 6 | RA5/AN5 β Analog input 5 / digital I/O RA5 |
| Pin 7 | RA6 β Digital I/O RA6 |
| Pin 8 | RA7 β Digital I/O RA7 |
| Pin 9 | VSS β Ground reference |
| Pin 10 | VDD β Positive supply voltage |
| Pin 11 | RB0/AN12 β Analog input 12 / digital I/O RB0 |
| Pin 12 | RB1/AN10 β Analog input 10 / digital I/O RB1 |
| Pin 13 | RB2/AN8 β Analog input 8 / digital I/O RB2 |
| Pin 14 | RB3/AN9 β Analog input 9 / digital I/O RB3 |
| Pin 15 | RB4/AN11 β Analog input 11 / digital I/O RB4 |
| Pin 16 | RB5 β Digital I/O RB5 |
| Pin 17 | RB6/PGC β ICSP clock / digital I/O RB6 |
| Pin 18 | RB7/PGD β ICSP data / digital I/O RB7 |
| Pin 19 | RC0 β Digital I/O RC0 |
| Pin 20 | RC1 β Digital I/O RC1 |
| Pin 21 | RC2 β Digital I/O RC2 |
| Pin 22 | RC3 β Digital I/O RC3 |
| Pin 23 | RC4 β Digital I/O RC4 |
| Pin 24 | RC5 β Digital I/O RC5 |
| Pin 25 | RC6 β Digital I/O RC6 |
| Pin 26 | RC7 β Digital I/O RC7 |
| Pin 27 | MCLR β Master clear reset (active-low) |
| Pin 28 | EP β Exposed thermal pad (connect to VSS) |
Typical Applications
PIC16F1778T-I/MX is suitable for 6 applications: LED Lighting Ballast Control, Switch-Mode Power Supply (SMPS) Control, BLDC and Brushed Motor Control, Battery Charging and Fuel Gauging, Solar Charge Controller, Industrial Sensor Hub / General-Purpose Control.
LED Lighting Ballast Control
The PIC16F1778T-I/MX is a strong fit for digital LED ballasts because it combines 32MHz FOSC, 28KB flash, multiple high-resolution PWM channels, on-chip operational amplifiers, and comparators on a single die. With these peripherals a designer can implement closed-loop constant-current control, color-mixing algorithms, and DMX or DALI communication in firmware without external analog ICs. The 28-UQFN (MX) 6x6 mm footprint suits compact bulb and downlight form factors, while the industrial -40C to +85C temperature grade covers indoor and outdoor luminaires. Designers commonly pair the part with Microchip's application note reference firmware for dim-to-warm and flicker-free PWM.
Recommended
Switch-Mode Power Supply (SMPS) Control
For AC-DC and DC-DC converter control, the PIC16F1778T-I/MX offers dedicated slope-compensation hardware, configurable logic cells, and high-speed comparators that close the current-mode control loop deterministically at the 32MHz instruction rate. The 28KB flash accommodates full state-machine firmware plus Look-Up Tables for non-linear control, while the 10-bit ADC handles output voltage sensing and input brown-out detection. The UQFN-28 (MX) 6x6 mm package with exposed thermal pad helps dissipate the small losses from internal logic, and the industrial temperature grade suits industrial auxiliary supplies, USB-PD adapters and Class-D audio rails.
Recommended
BLDC and Brushed Motor Control
The PIC16F1778T-I/MX suits both brushed DC and brushless DC (BLDC) motor control because it exposes multiple PWM/capture/compare channels and high-speed comparators that can be configured for back-EMF zero-crossing detection. With 28KB flash the firmware fits sensorless trapezoidal or simple FOC commutation tables, while 2KB RAM holds the state machine and current loop buffers. The 28-UQFN (MX) 6x6 mm footprint integrates cleanly into small appliance and PCB-mounted motor hubs, and the industrial -40C to +85C rating supports HVAC actuators, fans, pumps, and small e-mobility controllers.
Recommended
Battery Charging and Fuel Gauging
Lithium-ion, lead-acid and NiMH charging algorithms map well to the PIC16F1778T-I/MX thanks to its on-chip 10-bit ADC, op amps and comparators for cell voltage and current sensing, plus 28KB flash for charging state machines and protection logic. Designers can implement CC/CV profiles, temperature fold-back and end-of-charge detection without external analog front-ends. The UQFN-28 (MX) 6x6 mm package enables compact battery-management boards for power tools, e-bikes, and uninterruptible supplies, and the industrial temperature grade supports outdoor and automotive-cabin charging nodes.
Recommended
Solar Charge Controller
Small photovoltaic charge controllers benefit from the PIC16F1778T-I/MX because the device combines PWM generation for MPPT switching, ADC channels for panel and battery voltage sensing, and configurable logic for synchronous rectification timing. The 28KB flash hosts MPPT lookup logic and protection state machines, while the UQFN-28 (MX) 6x6 mm package enables compact IP65-rated outdoor enclosures. The industrial -40C to +85C rating handles the wide diurnal temperature swings of rooftop solar nodes, and Microchip's application notes provide firmware reference designs for PWM and incremental-conductance MPPT.
Recommended
Industrial Sensor Hub / General-Purpose Control
As a general-purpose controller, the PIC16F1778T-I/MX aggregates analog sensor inputs through its 10-bit ADC and op amps, processes them in firmware, and drives digital outputs via PWM and GPIO. The 28KB flash handles protocol stacks (Modbus RTU, LIN, custom UART), while 2KB RAM supports circular buffers for sensor data logging. The UQFN-28 (MX) 6x6 mm footprint drops onto small industrial sensor PCBs for HVAC, building automation, and factory-floor modules, and the -40C to +85C industrial temperature grade satisfies most indoor and sheltered outdoor installations.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1778T-I/MX β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1778-I/MX | PIC16F1776T-I/MX | PIC16F1769-I/SO |
|---|---|---|---|---|
| Package | 28-UQFN (MX) 6x6 mm | 28-UQFN (MX) 6x6 mm - same | 28-UQFN (MX) 6x6 mm - same | 28-SOIC - different |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Clock | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Temperature Grade | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C |
| Packaging Format | Tape & Reel | Tray | Tape & Reel | Tube |
| Pin Count | 28 | 28 | 28 | 28 |
| Lifecycle Status | Active | Active | Active | Active |
Key Differentiators
- Tape-and-reel packaging for high-volume SMT (vs PIC16F1778-I/MX)
- Same silicon as PIC16F1778 tray version (vs PIC16F1776T-I/MX)
- Integrated Intelligent Analog peripherals (vs PIC16F1769-I/SO)
Design Notes
Place a 100nF ceramic bypass capacitor and a 10uF bulk capacitor within 3 mm of the VDD/VSS pins of the PIC16F1778T-I/MX. The 28-UQFN (MX) 6x6 mm package exposes a thermal pad on pin 28 that must be soldered to a copper pour connected to VSS to provide both mechanical strength and a low-impedance ground return. Without the thermal pad soldered, the part may exceed its junction temperature under sustained PWM and ADC activity.
RB6 and RB7 are shared between general-purpose I/O and ICSP clock/data, so they must not be reassigned exclusively to peripherals if in-circuit programming is required. Add 4.7k pull-up resistors on MCLR to ensure reliable reset entry, and configure the configuration bits to enable the internal weak pull-ups on RB0-RB5 only if external hardware does not already bias those lines. Misconfigured configuration bits can lock the device out of ICSP.
Take advantage of the PIC XLP sleep modes by switching the CPU clock to LFINTOSC (31 kHz) or Sleep (deep sleep) when the firmware loop idles. For battery-powered designs, the on-board peripherals can be selectively disabled in firmware via the PMD register to drop quiescent current below 1 uA between ADC conversions. Average current for a 1 Hz wake-and-measure duty cycle is typically tens of microamps, suiting multi-year coin-cell sensor nodes.
Compliance Information
RoHS compliant per Microchip product page. Industrial temperature grade (-40C to +85C) only; for automotive AEC-Q100 qualified designs choose the PIC16F1778 automotive variant.
