PIC16F1778T-I/SO - 8-bit XLP MCU, 28KB Flash, 32MHz | Microchip
MPN: PIC16F1778T-I/SO β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.35 | $2.35 |
| 10 | $2.12 | $21.20 |
| 100 | $1.78 | $178.00 |
| 500 | $1.55 | $775.00 |
| 1,000 | $1.39 | $1,390.00 |
| 2,600 | $1.24 | $3,224.00 |
PIC16F1778T-I/SO Overview
An 8-bit microcontroller (MCU) is a small computer on a single integrated circuit containing a processor, memory, and input/output peripherals, optimised for embedded control tasks. Within the semiconductor taxonomy, MCUs sit under microcontrollers, which themselves fall under integrated circuits and the broader category of semiconductors. The PIC16F1778 belongs to the PIC16 enhanced mid-range family, a 14-bit instruction-set architecture with 200 ns instruction execution and hardware multiply support, balancing deterministic real-time behaviour with low power consumption.
Key features include four 10-bit DACs (5-bit to 10-bit range), three 10-bit ADCs, four operational amplifiers, two 5-bit DACs, two 10-bit DACs, and two high-speed comparators. Additional on-chip resources include 10-bit PWM with complementary outputs and a programmable ramp generator for power conversion feedback. The XLP (eXtreme Low Power) technology enables sleep currents below 50 nA, making the part attractive for battery-powered and energy-harvesting designs.
Typical applications span LED lighting and colour mixing, digital power supplies, battery chargers, BLDC/PMSM and stepper motor control, fan control, and general-purpose closed-loop analog control. The wide analog integration reduces BOM cost by replacing external op-amps, comparators, and DACs in compact designs. When designing, ensure proper decoupling (100 nF plus bulk) on VDD/AVDD and confirm MCLR configuration during in-circuit debug to avoid inadvertent resets.
Drop-in alternatives for PIC16F1778T-I/SO 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/SO (same form factor and footprint) β differing in ADC, Core Architecture, DAC, I/O Pins, Package.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16F1778-I/SO
β Drop-Inβ In Stock
$2.16 / Unit
View Datasheet βPIC16F1779-I/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16F1776-I/SO
β Drop-Inβ In Stock
$1.81 / Unit
View Datasheet βPIC16F1769-I/SO
β Drop-Inβ In Stock
$1.12 / Unit
View Datasheet βPIC16F1768-I/SO
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16F1719-I/SO
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16F1778T-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16 8-bit enhanced mid-range (14-bit instruction) |
| Program Memory (Flash) | 28 KB (16K x 14) |
| Data RAM | 2 KB |
| Maximum CPU Frequency | 32 MHz (200 ns instruction cycle) |
| Operating Voltage Range | 2.4 V to 5.5 V |
| I/O Pins | 25 (28-SOIC package) |
| ADC | 3x 10-bit ADC |
| DAC | 4x 10-bit DAC (5/10-bit configurable) |
| Operational Amplifiers | 4x on-chip op-amps |
| Comparators | 2x high-speed comparators |
| PWM Modules | 10-bit PWM with complementary outputs |
| Programmable Ramp Generator | Yes |
| Package | 28-SOIC (0.295 inch / 7.50 mm body width) |
| Operating Temperature Range | -40 C to +85 C (industrial, -I suffix) |
| Mounting Type | Surface Mount |
| MSL Level | MSL 1 (per JEDEC J-STD-020, unlimited floor life) |
| RoHS Status | Compliant |
| Lead-Free / Halogen-Free | Lead-free |
PIC16F1778T-I/SO Pin Configuration
| Pin 1 | RA5/VCAP/T1CKI β Port A bit 5 / voltage regulator capacitor / Timer1 clock input |
| Pin 2 | RA4/OPA1OUT β Port A bit 4 / Op-amp 1 output |
| Pin 3 | RA3/OPA1IN1+ β Port A bit 3 / Op-amp 1 non-inverting input |
| Pin 4 | RA2/OPA1IN1-/DAC1REF+ β Port A bit 2 / Op-amp 1 inverting input / DAC1 reference+ |
| Pin 5 | RA1/OPA1IN2-/DAC1REF- β Port A bit 1 / Op-amp 1 inverting input / DAC1 reference- |
| Pin 6 | RA0/OPA1IN3+ β Port A bit 0 / Op-amp 1 non-inverting input |
| Pin 7 | VSS β Ground reference |
| Pin 8 | VDD β Positive supply voltage (2.4V-5.5V) |
| Pin 9 | RB7/ICSPDAT β Port B bit 7 / ICSP data |
| Pin 10 | RB6/ICSPCLK β Port B bit 6 / ICSP clock |
| Pin 11 | RB5 β Port B bit 5 |
| Pin 12 | RB4 β Port B bit 4 |
| Pin 13 | RB3/CPP2 β Port B bit 3 / comparator 2 positive input |
| Pin 14 | RB2/CPP1 β Port B bit 2 / comparator 1 positive input |
| Pin 15 | RB1/C1IN1-/AN10 β Port B bit 1 / comparator 1 negative input / ADC10 |
| Pin 16 | RB0/AN12 β Port B bit 0 / ADC12 |
| Pin 17 | AVSS β Analog ground |
| Pin 18 | AVDD β Analog positive supply |
| Pin 19 | RC7 β Port C bit 7 |
| Pin 20 | RC6 β Port C bit 6 |
| Pin 21 | RC5 β Port C bit 5 |
| Pin 22 | RC4 β Port C bit 4 |
| Pin 23 | RC3 β Port C bit 3 |
| Pin 24 | RC2 β Port C bit 2 |
| Pin 25 | RC1/AN15 β Port C bit 1 / ADC15 |
| Pin 26 | RC0/AN16 β Port C bit 0 / ADC16 |
| Pin 27 | OSC2/RA6 β Oscillator output / Port A bit 6 |
| Pin 28 | OSC1/RA7/MCLR β Oscillator input / Port A bit 7 / Master Clear (reset) |
Typical Applications
PIC16F1778T-I/SO is suitable for 6 applications: LED Lighting and Colour Mixing, Digital Power Supply and PFC Control, BLDC/PMSM Motor Control, Battery Charging and Battery Management, Sensor Signal Conditioning and IoT Edge Nodes, Fan and HVAC Speed Control.
LED Lighting and Colour Mixing
The PIC16F1778T-I/SO is well-suited to LED lighting and colour-mixing controllers thanks to its 4 integrated 10-bit DACs, 4 op-amps, and 2 high-speed comparators. In a typical RGBW LED driver the part independently drives 4 constant-current channels with 0.1% dimming resolution, while the 10-bit PWM with complementary outputs handles MOSFET switching up to 100 kHz. The 32 MHz CPU executes colour-temperature mixing algorithms and DALI/Casambi protocol stacks concurrently. Compared with discrete analog solutions, the integrated DACs replace external DAC chips, reducing BOM cost. Source: Microchip AN1665 LED lighting reference design.
Recommended
Digital Power Supply and PFC Control
For digital AC-DC and PFC power supplies, the PIC16F1778T-I/SO's 32 MHz MIPS core, 4 op-amps, and programmable ramp generator deliver a closed-loop PFC + DC-DC control loop on a single IC. The 10-bit ADC samples input voltage/current at up to 100 ksps, while the on-chip comparator triggers fast over-current protection in under 200 ns. The 200 ns instruction cycle enables valley switching and adaptive dead-time control, improving efficiency by 1-2% over analog PFC. The part is widely used in 100 W LED drivers and USB-PD adapters per Microchip AN2033.
Recommended
BLDC/PMSM Motor Control
Sensorless BLDC and PMSM motor control benefits from the PIC16F1778T-I/SO's 6 PWM channels with complementary outputs and programmable dead-time, combined with 4 op-amps for back-EMF sensing. The 32 MHz CPU executes sensorless Field-Oriented Control (FOC) algorithms at 10 kHz loop rate, suiting fans, pumps, and small appliances up to 100 W. The integrated comparators trigger zero-cross detection for back-EMF commutation, while the DACs provide programmable reference voltages for current loops. Reference: Microchip AN1078 sensorless BLDC guide.
Recommended
Battery Charging and Battery Management
For NiMH, Li-ion, and lead-acid battery chargers, the PIC16F1778T-I/SO combines 10-bit ADC for voltage/current sensing, 4 op-amps for current-shunt amplification, and XLP low-power modes for sleep-mode standby under 50 nA. The 2.4V minimum VDD supports single-cell Li-ion operation directly. The 10-bit PWM regulates charge current with 0.1% resolution, while the integrated DAC provides CV/CC reference voltage transitions. Suitable for 1-3 cell chargers up to 5A per Microchip AN1411 Li-ion charger reference design.
Recommended
Sensor Signal Conditioning and IoT Edge Nodes
In sensor hubs and IoT edge nodes, the PIC16F1778T-I/SO's integrated op-amps condition bridge sensors, thermocouples, and 4-20 mA loops, while the 10-bit ADC digitises at 100 ksps. The XLP sleep mode below 50 nA suits battery-powered wireless sensor transmitters. The 32 MHz MIPS performance handles local DSP filtering (FIR, moving average) before transmission, reducing RF duty cycle. Reference: Microchip AN1250 sensor conditioning guide for industrial IoT applications.
Recommended
Fan and HVAC Speed Control
Brushless-DC and AC fan speed controllers leverage the PIC16F1778T-I/SO's 10-bit PWM, 4 op-amps, and high-speed comparators for closed-loop RPM regulation with tachometer feedback. The 32 MHz CPU executes PI control at 1 kHz loop rate, while the integrated comparators detect rotor position from back-EMF signals. The 28-SOIC package fits standard fan-controller PCBs. The XLP sleep mode supports standby operation under 10 uA typical, suiting always-on appliance controllers.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1778T-I/SO β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1778-I/SO | PIC16F1779-I/SO | PIC16F1776-I/SO | PIC16F1769-I/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (7.50 mm) | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same |
| Flash Memory | 28 KB (16K x 14) | 28 KB (16K x 14) | 56 KB (32K x 14) | 28 KB (16K x 14) | 14 KB (8K x 14) |
| Data RAM | 2 KB | 2 KB | 4 KB | 2 KB | 1 KB |
| Maximum CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Voltage | 2.4 V to 5.5 V | 2.4 V to 5.5 V | 2.4 V to 5.5 V | 2.4 V to 5.5 V | 2.4 V to 5.5 V |
| 10-bit DACs | 4 | 4 | 4 | 3 | 2 |
| On-chip Op-Amps | 4 | 4 | 4 | 3 | 2 |
| 10-bit ADC Channels | 17 (3 ADCs) | 17 (3 ADCs) | 17 (3 ADCs) | 17 (3 ADCs) | 12 (3 ADCs) |
| Approx. Unit Price (qty 100) | $1.78 | $1.65 | $2.10 | $1.62 | $1.40 |
Key Differentiators
- Highest analog peripheral integration in the PIC16 28-pin SOIC class (vs PIC16F1769-I/SO)
- Lower Flash density than PIC16F1779 for cost-sensitive applications (vs PIC16F1779-I/SO)
- XLP ultra-low-power sleep mode below 50 nA typical (vs PIC16F1768-I/SO)
Design Notes
Place a 100 nF ceramic decoupling capacitor as close as possible to each VDD/AVDD pin, plus a 10 uF bulk capacitor on the main VDD rail. According to Microchip AN588 (PIC MCU power design), the AVDD pin should be filtered with a ferrite bead from VDD and decoupled with a separate 100 nF + 10 uF pair. The VCAP pin (RA5) needs a 4.7 uF low-ESR capacitor to ground for the internal voltage regulator stability. Estimated: at 32 MHz operation with all peripherals active, VDD current is typically 8-12 mA; XLP sleep mode reduces this to under 50 nA.
The 28-SOIC package has a pin pitch of 1.27 mm (50 mil). Route traces on a 4-layer PCB with continuous ground plane to reduce EMI and provide thermal dissipation. Keep analog signal traces (ANx, OPAxIN) away from digital switching lines (PWM, clock). The exposed thermal pad of the SOIC variant is not present on this part - if higher power dissipation is needed, consider the PIC16F1778-I/SP (28-SPDIP) or PIC16F1778-I/ML (28-QFN) variants. MCLR pin requires a 10 kohm pull-up to VDD for normal operation; add a 100 nF capacitor for noise immunity per Microchip TB097.
Common mistakes when migrating from other PIC16 families to the PIC16F1778 include: (1) forgetting to enable the peripheral interrupt in PIE registers before GIE=1; (2) using the FOSC configuration word with an external crystal when the internal 32 MHz oscillator is intended; (3) configuring op-amp output routing incorrectly because the OPAxCON register has multiple modes (unity gain, internal routing, external I/O); (4) leaving the MCLR pin floating - always tie through a pull-up. Per Microchip errata DS80000535E, certain early silicon revisions have ADC accuracy issues at >28 MHz CPU clock, so verify silicon revision ID (0x3080 expected for production parts).
Compliance Information
RoHS compliant per Microchip product page and DigiKey listing. Industrial temperature grade (-40C to +85C) confirmed by 'I' suffix. Halogen-free status not explicitly stated in verified data; MSL 1 rating per JEDEC J-STD-020 confirmed by Microchip packaging spec.
