PIC16F1778-I/SS - 8-bit MCU 28KB Flash 2KB RAM 28-SSOP | Microchip
MPN: PIC16F1778-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.8 | $2.80 |
| 10 | $2.52 | $25.20 |
| 100 | $2.24 | $224.00 |
| 500 | $1.96 | $980.00 |
| 1,000 | $1.75 | $1,750.00 |
PIC16F1778-I/SS Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (Flash for program storage and SRAM for data), and programmable peripheral interfaces into one package. The 8-bit class is the simplest, lowest-cost, and lowest-power tier of MCUs, well suited to deterministic real-time control loops. PIC16F1xxx parts sit in Microchip's enhanced mid-range (XLP™) family with the MIPS-based Harvard architecture, placing them above basic PIC10/12/14 devices in peripheral richness while staying far below 32-bit Cortex-M parts in price and complexity.
Key features of the PIC16F1778 include four 10-bit ADC modules with up to 28 analog channels, two 10-bit DACs, four 8-bit DACs, four operational amplifiers, three comparators, a 16-bit PWM with four outputs, complementary waveform generators, and a 32 MHz internal oscillator with ±1 % accuracy. The 28-SSOP package offers a low-profile surface-mount footprint well suited to compact LED-driver, sensor-hub, and appliance control boards. The 'XLP' (eXtreme Low Power) technology provides sleep currents below 50 nA, allowing battery-powered designs to run for years on a single cell.
Typical applications include LED lighting drivers, primary- or secondary-side SMPS control, BLDC and stepper motor control, battery charging, and general-purpose analog/mixed-signal systems. Designers choose this part when they need rich on-chip analog integration without the cost or complexity of a 32-bit MCU.
Drop-in alternatives for PIC16F1778-I/SS — 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-I/SS (same form factor and footprint) — differing in Package, ADC, Core Architecture, Program Memory (Flash), Comparators.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1776-I/SS
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View Datasheet →PIC16F1769-I/SS
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View Datasheet →PIC16F1708-I/SS
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View Datasheet →PIC16F1713-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F15344-I/SS
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View Datasheet →PIC16F1518-I/SS
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View Datasheet →PIC16F1778-I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16 (8-bit enhanced mid-range, Harvard) |
| Family | PIC® XLP™ 16F1xxx |
| Program Memory (Flash) | 28 KB |
| RAM | 2 KB |
| Maximum CPU Speed | 32 MHz |
| Operating Voltage Range | 1.8 V to 5.5 V |
| I/O Pins | 25 (28-pin package) |
| ADC | 4 x 10-bit, up to 28 channels |
| DAC | 2 x 10-bit + 4 x 8-bit |
| Op Amps | 4 on-chip |
| Comparators | 3 |
| PWM Channels | 16-bit, 4 outputs (with complementary) |
| Package | 28-pin SSOP (5.30 mm body) |
| Temperature Grade (I) | -40 °C to +85 °C (industrial) |
| RoHS Status | Compliant |
PIC16F1778-I/SS Pin Configuration
| Pin 1 | RA2/AN2 — Port A bit 2 / Analog input 2 |
| Pin 2 | RA3/AN3/Vref+ — Port A bit 3 / Analog input 3 / Positive reference voltage |
| Pin 3 | RA4/T0CKI/AN4 — Port A bit 4 / Timer0 clock input / Analog input 4 |
| Pin 4 | RA5/AN5 — Port A bit 5 / Analog input 5 |
| Pin 5 | VDD — Positive supply voltage |
| Pin 6 | VSS — Ground reference |
| Pin 7 | RA6/AN6/OSC2/CLKOUT — Port A bit 6 / Analog input 6 / Oscillator output / Clock out |
| Pin 8 | RA7/AN7/OSC1/CLKIN — Port A bit 7 / Analog input 7 / Oscillator input / Clock in |
| Pin 9 | RB0/AN8 — Port B bit 0 / Analog input 8 |
| Pin 10 | RB1/AN10 — Port B bit 1 / Analog input 10 |
| Pin 11 | RB2/AN8 — Port B bit 2 / Analog input 8 (alt) |
| Pin 12 | RB3/AN9 — Port B bit 3 / Analog input 9 |
| Pin 13 | RB4/AN11 — Port B bit 4 / Analog input 11 |
| Pin 14 | RB5/AN13 — Port B bit 5 / Analog input 13 |
| Pin 15 | RB6/ICSPCLK — Port B bit 6 / In-circuit serial programming clock |
| Pin 17 | RB7/ICSPDAT — Port B bit 7 / In-circuit serial programming data |
| Pin 18 | RC0 — Port C bit 0 |
| Pin 19 | RC1 — Port C bit 1 |
| Pin 20 | RC2 — Port C bit 2 |
| Pin 21 | RC3 — Port C bit 3 |
| Pin 22 | RC4 — Port C bit 4 |
| Pin 23 | RC5 — Port C bit 5 |
| Pin 24 | RC6 — Port C bit 6 |
| Pin 25 | RC7 — Port C bit 7 |
| Pin 26 | RE3/MCLR — Reset / Master Clear (active low) |
| Pin 27 | VDD — Positive supply voltage (alt pin) |
| Pin 28 | VSS — Ground reference (alt pin) |
Typical Applications
PIC16F1778-I/SS is suitable for 7 applications: LED Lighting and Color-Mixing Drivers, Switch-Mode Power Supply (SMPS) Control, BLDC and Stepper Motor Control, Battery Charging and Battery Management, Industrial Sensor Hubs and IoT Edge Nodes, Consumer Appliance Control Boards, Power Conversion and Digital Power Loops.
LED Lighting and Color-Mixing Drivers
The PIC16F1778-I/SS is purpose-built for LED-lighting applications, integrating four 10-bit ADC modules, two 10-bit DACs, four 8-bit DACs, and four op-amps on a single die. Its four 8-bit DACs can drive individual LED-channel current references in RGBW or tunable-white luminaires with up to 28 analog inputs available on the 28-SSOP pinout. Compared with a discrete analog front-end, the on-chip DACs and op-amps eliminate several external op-amp ICs and trim pots, shrinking BOM cost and PCB area. The 16-bit complementary PWM supports high-frequency constant-current buck/boost LED-driver stages without external gate-driver logic.
Recommended
Switch-Mode Power Supply (SMPS) Control
The PIC16F1778-I/SS is well suited to primary- and secondary-side control of isolated and non-isolated SMPS topologies. Its high-speed 10-bit ADC combined with comparators and op-amps enables peak-current-mode control loops and cycle-by-cycle current limiting on a single chip. The complementary 16-bit PWM provides deterministic dead-time generation, which is essential for full-bridge, half-bridge, and active-clamp flyback topologies operating above 200 kHz. The on-chip op-amps can be used as current-sense amplifiers, replacing external current-sense ICs and reducing total solution cost in sub-100 W adapters.
Recommended
BLDC and Stepper Motor Control
Sensorless BLDC commutation is enabled on the PIC16F1778-I/SS by its three comparators and four op-amps, which can be configured as a back-EMF zero-crossing detector network without external analog circuitry. The complementary 16-bit PWM with hardware dead-time generation drives three-phase half-bridges directly, while the 32 MHz MIPS core handles state-machine transitions and field-oriented-control math for steppers. Industrial-grade -40 °C to +85 °C operation makes it suitable for small fans, pumps, appliance compressors, and robotics actuators. For higher-power designs the firmware migrates easily to the PIC16F1779 in the 40/44-pin packages.
Recommended
Battery Charging and Battery Management
The PIC16F1778-I/SS integrates the analog front-end needed for multi-chemistry battery chargers - four ADC modules and four op-amps combine to monitor pack voltage, cell voltage, charge current, and temperature with minimal external components. Its eXtreme Low Power (XLP) technology reduces sleep current below 50 nA, allowing long battery standby in portable and IoT applications. Closed-loop charge-termination and JEITA temperature profile handling can run entirely on-chip while the comparator-driven PWM regulates the charge current. The 1.8 V minimum operating voltage supports single-cell LiFePO4 packs that drop below 2.5 V at deep discharge.
Recommended
Industrial Sensor Hubs and IoT Edge Nodes
Industrial sensor-hub designs leverage the PIC16F1778-I/SS's 28 analog channels to aggregate multiple 4-20 mA, 0-10 V, or thermistor inputs on a single MCU without external multiplexers. Its 32 MHz core runs protocol stacks such as Modbus RTU, IO-Link, and LIN, while the 2 KB SRAM buffers local data and the on-chip comparators provide fast over-voltage or over-current trip responses. The XLP sleep modes at sub-50 nA make it attractive for line-powered and battery-backed sensor installations. The 28-SSOP industrial temperature rating (-40 °C to +85 °C) satisfies IEC 60068-2-1 and -2-2 environmental requirements for indoor industrial cabinets.
Recommended
Consumer Appliance Control Boards
In consumer appliances such as coffee machines, induction cooktops, washing machines, and air purifiers, the PIC16F1778-I/SS acts as the main control MCU. Its 28-SSOP low-profile footprint fits beneath I/O connectors and next to high-voltage sections, while its 5.5 V maximum operating voltage supports direct connection to a 5 V regulated rail. The on-chip op-amps and comparators handle zero-crossing detection for TRIAC-based heater or motor drivers, and the complementary PWM with dead-time drives IGBT half-bridges in small inverter stages. eXtreme Low Power (XLP) sleep modes keep standby power consumption in standby well below EU Ecodesign limits for connected appliances.
Recommended
Power Conversion and Digital Power Loops
Digital-loop power conversion is one of the PIC16F1778-I/SS's design targets. With 32 MIPS of compute, four 10-bit ADC modules sampled near-simultaneously, and a hardware 16-bit PWM with complementary outputs and programmable dead-time, the MCU can implement average-current-mode and peak-current-mode control loops for buck, boost, SEPIC, Cuk, and PFC stages. The on-chip op-amps and comparators close the current-sense and voltage-sense feedback loops without external analog ICs, reducing BOM cost. Industrial-grade -40 °C to +85 °C operation supports telecom, industrial, and renewable-energy distributed-power applications.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1778-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1776-I/SS | PIC16F1769-I/SS | PIC16F1708-I/SS | PIC16F1713-I/SS | PIC16F15344-I/SS | PIC16F1518-I/SS |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Flash | 28 KB | 28 KB (same) | 28 KB (same) | 16 KB (-43%) | 7 KB (-75%) | 7 KB (-75%) | 28 KB (same) |
| RAM | 2 KB | 2 KB (same) | 2 KB (same) | 1 KB (-50%) | 512 B (-75%) | 512 B (-75%) | 1 KB (-50%) |
| Max CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Op Amps (on-chip) | 4 | 4 | 3 | 0 | 2 | 2 | 0 |
| ADC Modules | 4 x 10-bit | 4 x 10-bit | 4 x 10-bit | 1 x 10-bit | 1 x 10-bit | 2 x 10-bit | 1 x 10-bit |
| XLP Sleep Current | <50 nA | <50 nA | <50 nA | <50 nA | <50 nA | <30 nA | <50 nA |
| Operating Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 1.8 V to 5.5 V |
Key Differentiators
- Four integrated op-amps plus four 10-bit ADC modules on-chip (vs PIC16F1708-I/SS)
- Larger Flash and RAM than the lower-tier family members (vs PIC16F1713-I/SS)
- Industrial-grade -40 °C to +85 °C operation across the family (vs PIC16F1768-I/SS)
Design Notes
Estimated: at 32 MHz active current is approximately 130 µA/MHz × 32 MHz = 4.16 mA from a 3.3 V supply, totaling ~13.7 mW. Place a 100 nF ceramic decoupling capacitor as close as possible to the VDD pin and a bulk 4.7 µF capacitor on the same rail. For battery-powered designs, leverage the PIC16F1778-I/SS's XLP sleep modes - sleep current drops below 50 nA, allowing a CR2032 to power periodic sensing for several years. Always tie MCLR (pin 26) to VDD through a 10 kΩ pull-up for normal operation, or leave it driven by a supervisor for reliable brown-out behavior.
The 28-SSOP has a 0.65 mm pitch and 5.30 mm body width, so routed escape between pads must use thin traces with vias in the pad or just outside. Place the decoupling capacitor within 2 mm of each VDD/VSS pin pair and route the analog AVSS/AVDD reference traces away from switching PWM lines to minimize digital-to-analog crosstalk. The exposed thermal pad is not present on the 28-SSOP, but a solid ground pour directly under the package improves thermal dissipation and reduces EMI on PWM outputs. Keep the ICSP programming lines (RB6/ICSPCLK and RB7/ICSPDAT) routed so the programming header is accessible.
Do not assume the PIC16F1778-I/SS defaults to 32 MHz on reset - the configuration words must explicitly select the HFINTOSC and set the oscillator frequency. Forgetting to configure the IRCF bits leaves the device at 500 kHz, which appears as sluggish analog sampling and missed PWM updates. Also, the analog inputs are multiplexed with digital I/O - always clear the corresponding ANSEL bit to enable analog mode, otherwise the ADC reading will be floating. Finally, the complementary PWM dead-time is in hardware but must be configured via the PWMxCON register; without proper dead-time, half-bridge drivers risk shoot-through in motor-control applications.
Compliance Information
RoHS-compliant and lead-free per Microchip product page. Industrial temperature grade (-40 °C to +85 °C) suitable for indoor industrial and consumer applications; AEC-Q100 automotive variants are not applicable in the 28-SSOP package.
