PIC16F1778-E/MX - 8-Bit MCU 32MHz 28KB Flash 28-UQFN | Microchip
MPN: PIC16F1778-E/MX ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.27 | $227.00 |
| 500 | $1.98 | $990.00 |
| 1,000 | $1.72 | $1,720.00 |
PIC16F1778-E/MX Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (typically flash), SRAM, and a rich set of on-chip peripherals such as timers, ADC/DAC, communication interfaces, and GPIO. In modern embedded systems, MCUs sit beneath the application layer in the system hierarchy: MCU -> embedded processor -> semiconductor IC -> electronic component. PIC microcontrollers from Microchip use a 14-bit instruction word modified Harvard architecture and are popular for cost-sensitive, deterministic, low-power designs thanks to the eXtreme Low Power (XLP) technology family.
Key features of the PIC16F1778-E/MX include 28 KB flash, 2 KB RAM, 256 B EEPROM, four 16-bit timers, two 10-bit ADC modules with up to 17 channels, two 10-bit DACs, two comparators, two operational amplifiers, four 16-bit PWMs with PWM steering, Complementary Waveform Generator (CWG), Data Signal Modulator (DSM), Zero-Cross Detect (ZCD), Programmable Ramp Generator (PRG), and a 32 MHz internal oscillator. Communication interfaces include I²C, SPI, and EUSART with auto-baud.
The device is fabricated on a low-power CMOS process and supports XLP sleep currents in the microampere range, making it suitable for battery-powered applications. The integrated op-amps, comparators, DACs and 16-bit PWM form a hardware signal chain that can implement closed-loop current/voltage regulation, motor commutation, or LED dimming without loading the CPU.
Typical applications include LED lighting and color mixing, switch-mode power supplies (PFC, LLC), battery chargers (CC/CV profile), BLDC and brushed DC motor control, fan control, and general-purpose sensor interfacing. The high level of analog integration also suits smart sensor signal conditioning and IoT edge nodes.
When designing with this MCU, ensure the VDD/VSS pins are properly decoupled with 100 nF ceramic capacitors close to the package, and follow the UQFN thermal pad soldering recommendations. Programming is supported via MPLAB X IDE, MPLAB Code Configurator (MCC), and the PICkit or ICD programming tools over ICSP.
This page synthesizes distributor pricing, pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet alone, giving an engineer a single decision-grade reference for the PIC16F1778-E/MX.
Drop-in alternatives for PIC16F1778-E/MX — 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 PIC16F1778-E/MX (same form factor and footprint) — differing in Communication, Comparators, Core Architecture, DAC, Maximum CPU Speed.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1776-I/MX
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1719-I/MX
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1769-I/MX
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16F15356-E/MX
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.21 / Unit
View Datasheet →PIC16F1705-I/MX
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16F1778-E/MX Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC® 8-bit (14-bit instruction word, modified Harvard) |
| Family | PIC16(L)F177x - PIC® XLP™ |
| Program Memory (Flash) | 28 KB (16K x 14 words) |
| Data SRAM | 2 KB |
| Data EEPROM | 256 B |
| Maximum CPU Speed | 32 MHz (8 MIPS) |
| Package | 28-pin UQFN (6x6 mm) (MX) |
| Operating Voltage (VDD) | 2.3 V to 5.5 V |
| Operating Temperature | -40 °C to +125 °C (extended) |
| ADC | 10-bit, up to 17 channels |
| DAC | 2x 10-bit |
| Comparators | 2 |
| Operational Amplifiers | 2 |
| PWM | 4x 16-bit with PWM steering |
| Other Analog/Digital | CWG, DSM, ZCD, PRG |
| Communication | I²C, SPI, EUSART (with auto-baud) |
| Timers | 4x 16-bit |
| I/O Pins | 25 (approx., per device datasheet) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC16F1778-E/MX Pin Configuration
| Pin 1 | RA0/ANA0/DAC1OUT1/OPA1OUT/COG1FLT — GPIO/Analog/DAC/OpAmp/COG fault |
| Pin 2 | RA1/ANA1/OPA1IN+/DAC1REF+/DAC2REF+ — GPIO/Analog/OpAmp non-inverting input/DAC reference |
| Pin 3 | RA2/ANA2/OPA1IN-/ZCD1 — GPIO/Analog/OpAmp inverting input/Zero-Cross Detect |
| Pin 4 | RA3/ANA3/VREF+/DAC1REF- — GPIO/Analog/Voltage reference/DAC reference |
| Pin 5 | RA4/ANA4/OPA1IN-/DAC2OUT1 — GPIO/Analog/OpAmp/DAC2 output |
| Pin 6 | RA5/ANA5/OPA2IN+/DAC3REF+ — GPIO/Analog/OpAmp2/DAC3 reference |
| Pin 7 | RA6/ANA6/OPA2OUT/COG2FLT — GPIO/Analog/OpAmp2 output/COG2 fault |
| Pin 8 | RA7/ANA7/OPA2IN-/DAC4OUT1 — GPIO/Analog/OpAmp2/DAC4 output |
| Pin 9 | VSS — Ground reference |
| Pin 10 | RB0/ANB0/CCP1/SDA1 — GPIO/Analog/PWM1/I²C data |
| Pin 11 | RB1/ANB1/CCP2/SCL1 — GPIO/Analog/PWM2/I²C clock |
| Pin 12 | RB2/ANB2/CCP3/COG1OUT — GPIO/Analog/PWM3/COG1 output |
| Pin 13 | RB3/ANB3/CCP4/COG2OUT — GPIO/Analog/PWM4/COG2 output |
| Pin 14 | RB4/ANB4/CWG1FLT/SPI_SS — GPIO/Analog/CWG fault/SPI slave select |
| Pin 15 | RB5/ANB5/CWG1OUT/SDI1 — GPIO/Analog/CWG output/SPI data in |
| Pin 16 | RB6/ANB6/PGC/ICSPCLK — GPIO/Analog/Programming clock |
| Pin 17 | RB7/ANB7/PGD/ICSPDAT — GPIO/Analog/Programming data |
| Pin 18 | VSS — Ground reference (second pad) |
| Pin 19 | VDD — Positive supply voltage (2.3 V to 5.5 V) |
| Pin 20 | MCLR/VPP/RE3 — Master Clear (reset) / Programming voltage |
| Pin 21 | RC0/ANC0/PWM5OUT/T1CKI — GPIO/Analog/PWM5/Timer1 clock |
| Pin 22 | RC1/ANC1/PWM6OUT/CCP8 — GPIO/Analog/PWM6/CCP8 |
| Pin 23 | RC2/ANC2/AN10/PWM7OUT — GPIO/Analog/AN10/PWM7 |
| Pin 24 | RC3/ANC3/AN11/PWM8OUT — GPIO/Analog/AN11/PWM8 |
| Pin 25 | RC4/ANC4/AN12/SDA2 — GPIO/Analog/AN12/I²C2 data |
| Pin 26 | RC5/ANC5/AN13/SCL2 — GPIO/Analog/AN13/I²C2 clock |
| Pin 27 | RC6/ANC6/AN14/TX1/CK1 — GPIO/Analog/AN14/UART1 TX |
| Pin 28 | RC7/ANC7/AN15/RX1/DT1 — GPIO/Analog/AN15/UART1 RX |
Typical Applications
PIC16F1778-E/MX is suitable for 6 applications: LED Lighting and Color Mixing, Switch-Mode Power Supply (PFC / LLC / Flyback), BLDC and Brushed DC Motor Control, Battery Charging (CC/CV Profiles), Industrial Sensor Signal Conditioning, IoT Edge Nodes and Smart Home Devices.
LED Lighting and Color Mixing
The PIC16F1778-E/MX is well suited to multi-channel LED lighting and color-mixing drivers thanks to its 4x 16-bit PWMs with PWM steering, 2x op-amps for current-sense amplification, and 2x 10-bit DACs for programmable LED current references. The integrated CWG (Complementary Waveform Generator) and DSM (Data Signal Modulator) generate dead-band-controlled complementary outputs to drive half-bridge LED stages without CPU intervention, freeing the 8-bit core for higher-level tasks such as DMX-512 or DALI protocol parsing. Hardware-accelerated color-space conversion can run in the background while the PWM and CWG maintain flicker-free dimming down to 0.1% duty cycle. The XLP sleep currents in the microampere range allow battery-powered architectural fixtures to retain wireless link state with negligible drain. Place a 100 nF decoupling capacitor on each VDD pin and route the op-amp feedback traces away from PWM switching nodes to preserve analog accuracy.
Recommended
Switch-Mode Power Supply (PFC / LLC / Flyback)
For switch-mode power supplies including PFC, LLC, and active-clamp flyback converters, the PIC16F1778-E/MX combines a 32 MHz CPU with hardware peripherals that implement control loops without firmware overhead. The 4x 16-bit PWMs with dead-band and fault shutdown implement primary-side switching, while the 2x op-amps close the current-mode loop by amplifying the shunt voltage directly on-chip, eliminating an external op-amp. The Programmable Ramp Generator (PRG) and Zero-Cross Detect (ZCD) synchronize valley-switching and critical-conduction-mode operation, while the 10-bit ADC samples Vout and Iout at high rate to maintain regulation. Compared to a discrete analog controller, this approach reduces BOM cost and enables firmware-based adaptive dead-time and soft-start profiling. For 24 V industrial rails or USB-PD adapters, the same MCU scales from 5 W to over 100 W by adjusting firmware parameters and output-stage MOSFETs.
Recommended
BLDC and Brushed DC Motor Control
The PIC16F1778-E/MX drives sensorless and sensored BLDC motors using its 16-bit PWMs for 3-phase complementary outputs with hardware dead-band insertion and the DSM for back-EMF zero-crossing demodulation. The 2x op-amps amplify phase-current shunt signals, while the 10-bit ADC captures them at the center of the PWM cycle for accurate FOC or trapezoidal commutation. With 32 MHz CPU bandwidth, the firmware can implement field-oriented control at moderate PWM frequencies (up to ~30 kHz) and still leave cycles for UART/USB diagnostics. For brushed DC motors, the H-bridge can be driven directly from PWM/COG outputs while the on-chip comparators implement cycle-by-cycle overcurrent protection. This integration removes the need for an external gate driver or current-sense amplifier in cost-sensitive applications such as small appliances and fans.
Recommended
Battery Charging (CC/CV Profiles)
The PIC16F1778-E/MX implements single- and multi-stage CC/CV battery chargers for Li-ion, LiFePO4, and lead-acid chemistries using its 10-bit ADC for Vbat and Ibat telemetry, the 10-bit DAC for programmable current references, and op-amps for high-side current sensing. The integrated comparators implement hardware-level overvoltage and overcurrent protection that latches the PWM even if the CPU is delayed. Firmware-based chemistry profiles (JEITA temperature compensation, dV/dt termination) execute on the 32 MHz core while the analog peripherals maintain regulation. Low-power XLP sleep allows the charger to monitor battery voltage in standby with negligible drain, making the MCU suitable for solar battery controllers and portable power banks. Add an external NTC thermistor on an ADC channel for temperature-qualified charging curves.
Recommended
Industrial Sensor Signal Conditioning
In industrial 4-20 mA loop-powered sensor transmitters and bridge-sensor interfaces, the PIC16F1778-E/MX provides integrated op-amps for instrumentation amplification, 10-bit ADC for digitization, and PWM/DAC outputs for 4-20 mA current loop generation - all from a single 5 V supply. The CIP architecture (CWG, DSM, ZCD) implements sensor excitation chopping and synchronous demodulation to cancel 1/f noise and offset drift. With EUSART and I²C interfaces, the conditioned signal can be transmitted via RS-485 or I³C to a central PLC while the MCU performs local linearization in firmware. The extended -40 °C to +125 °C temperature range supports factory-floor deployment. Use the EEPROM for storing calibration coefficients and the device ID for traceability.
Recommended
IoT Edge Nodes and Smart Home Devices
The PIC16F1778-E/MX serves as the local MCU in IoT edge nodes and smart home appliances where it offloads sensor reading, fan/relay control, and user-interface management to a host Wi-Fi/BLE module. Its XLP sleep current under 1 µA (with RTCC running) preserves coin-cell battery life in wireless sensors, while the 32 MHz core wakes up fast enough to handle BLE advertising beacons. The EUSART connects to modules like the RN4870 or ATWINC1500, and I²C drives environmental sensors (BME280, SHT31) and OLED displays. CIP peripherals (CWG for piezo buzzers, PWM for LED indicators, ADC for battery monitoring) keep the BOM small. For Matter or Thread border routers, the MCU handles the local device cluster logic while the network stack runs on a co-processor.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1778-E/MX — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1776-I/MX | PIC16F1719-I/MX | PIC16F1769-I/MX | PIC16F15356-E/MX | PIC16F1705-I/MX |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-UQFN (6x6) (MX) | 28-UQFN (6x6) - same | 28-UQFN (6x6) - same | 28-UQFN (6x6) - same | 28-UQFN (6x6) - same | 28-UQFN (6x6) - same |
| Core | PIC® 8-bit, 32 MHz | PIC® 8-bit, 32 MHz | PIC® 8-bit, 32 MHz | PIC® 8-bit, 32 MHz | PIC® 8-bit, 32 MHz | PIC® 8-bit, 32 MHz |
| Flash | 28 KB | 14 KB | 28 KB | 28 KB | 32 KB | 14 KB |
| SRAM | 2 KB | 1 KB | 2 KB | 2 KB | 2 KB | 1 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 128 B |
| ADC | 10-bit, 17 ch | 10-bit, 17 ch | 10-bit, 17 ch | 10-bit, 12 ch | 10-bit, 17 ch | 10-bit, 12 ch |
| Op-Amps | 2 | 2 | 0 | 0 | 0 | 2 |
| PWM (16-bit) | 4 | 4 | 2 | 4 | 5 | 2 |
| CWG/DSM/PRG | Yes (all) | Yes (all) | No | Limited | No (CIP only) | Limited |
| Operating Voltage | 2.3 V - 5.5 V | 2.3 V - 5.5 V | 2.3 V - 5.5 V | 2.3 V - 5.5 V | 2.3 V - 5.5 V | 2.3 V - 5.5 V |
| Operating Temperature | -40 °C to +125 °C (E) | -40 °C to +85 °C (I) | -40 °C to +85 °C (I) | -40 °C to +85 °C (I) | -40 °C to +125 °C (E) | -40 °C to +85 °C (I) |
Key Differentiators
- Highest analog integration in 28-UQFN PIC16 family (vs PIC16F1719-I/MX)
- 28 KB flash with full peripheral parity vs lower-flash 1776 (vs PIC16F1776-I/MX)
- Extended temperature range for industrial/automotive (vs PIC16F15356-E/MX)
- True 32 MHz performance with 8 MIPS (vs PIC16F1705-I/MX)
Design Notes
Decouple each VDD pin with a 100 nF X7R ceramic capacitor placed within 3 mm of the pin, and add a bulk 10 µF tantalum or aluminum-polymer capacitor on the same rail. The UQFN package exposes a thermal pad that must be soldered to a continuous ground pour to meet the datasheet thermal resistance. Avoid routing high-current switching traces under the MCU to prevent digital noise coupling into the analog inputs. Estimated: total quiescent current is dominated by the CPU clock speed; running at 32 MHz vs 1 MHz can change IDD by 2-3 mA depending on peripherals enabled.
The 28-UQFN (6x6 mm) package requires a 0.4 mm pitch land pattern with NSMD (Non-Solder Mask Defined) pads for reliable assembly. Place the MCLR pull-up resistor (typically 10 kΩ) close to the pin, and add a 100 nF capacitor on MCLR if long cable connections are present to filter ESD. For programming/debug, expose the ICSP pins (PGC/PGD) on a header or test point. Estimated: trace width for power rails should be at least 0.2 mm per ampere to limit voltage drop; the UQFN's small size allows routing only 2-3 signal layers between top and bottom.
Do not leave unused analog inputs floating - tie them to VSS or VDD through a 10 kΩ resistor to prevent shoot-through current and ADC noise. When migrating code from PIC16F1776 to PIC16F1778, verify that interrupt vector mapping matches and that peripheral libraries (PLIB) are updated for the larger flash size. The 'E' (extended) grade variant is required for any application above +85 °C; substituting an 'I' (industrial) grade is a common error that causes field failures in automotive or industrial environments. Estimated: programming the flash endurance is rated for 100K erase/write cycles minimum - use EEPROM for variables that change frequently.
Compliance Information
RoHS and REACH compliant per Microchip product environmental compliance information. The PIC16F1778 family is not AEC-Q100 qualified; for automotive designs requiring formal qualification, use the PIC16F1778-E/MXVAO extended-reliability part number or select a PIC16F1xxx variant with explicit automotive grade.
