PIC16F1778-I/SP - 8-Bit 32MHz 28KB Flash MCU | Microchip | 28-SPDIP
MPN: PIC16F1778-I/SP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.2 | $3.20 |
| 10 | $2.95 | $29.50 |
| 100 | $2.62 | $262.00 |
| 500 | $2.35 | $1,175.00 |
| 1,000 | $2.1 | $2,100.00 |
PIC16F1778-I/SP Overview
A PIC16F1778-I/SP microcontroller belongs to the 8-bit PIC16 enhanced mid-range MCU family, which sits within the broader PIC microcontroller taxonomy. PIC microcontrollers use a RISC (Reduced Instruction Set Computer) architecture with a 14-bit instruction word optimized for deterministic real-time control. Within Microchip's portfolio, PIC16F177x parts add integrated analog peripherals beyond classic PIC16F baselines, while the XLP (eXtreme Low Power) technology family provides sleep currents in the microamp range, making them suitable for battery-powered applications.
Key features of the PIC16F1778-I/SP include: 28KB Flash allowing 16K words of program code, 2KB SRAM for data, 256 bytes EEPROM for non-volatile storage, 32MHz internal oscillator supporting 8 MIPS instruction throughput, and 25 I/O pins with PPS routing. The integrated 10-bit ADC with computation (ADC2) supports hardware averaging and threshold comparison, while the 10-bit DAC, four op-amps, and high-speed comparators enable closed-loop power-conversion loops. The peripheral set also includes EUSART, SPI, I2C, and up to four 16-bit PWMs with complementary outputs and dead-band control.
Architecturally, the device uses a Harvard-style bus with separate program and data paths, a 15-level hardware stack, and 32 interrupt sources. The internal 32MHz oscillator is factory calibrated to ±1% across voltage and temperature, allowing designs to operate without an external crystal. The XLP sleep modes reduce quiescent current to a few microamps for battery-backed applications such as IoT sensor nodes or remote controls.
Typical applications include LED lighting drivers (constant-current and RGBW mixing), switch-mode power supplies (PFC and digital feedback loops), battery chargers (CC/CV profiles), brushed DC and stepper motor control, sensor signal conditioning with on-chip op-amps, and general-purpose mixed-signal embedded control. The integrated intelligent analog peripherals reduce external component count and BOM cost versus discrete analog designs.
Designers should plan memory headroom: 28KB Flash accommodates application code plus bootloader or wireless stacks, while 2KB SRAM is sufficient for protocol buffers and signal-processing scratchpad. The 28-SPDIP package is through-hole and ideal for prototyping, hand-soldered prototypes, and educational development boards. Programming uses ICSP (In-Circuit Serial Programming) via the PGD/PGC pins; in-circuit debugging requires no extra pins on this family.
This page synthesizes distributor pricing, drop-in alternatives within the same 28-SPDIP package, and practical design notes not found in the manufacturer datasheet alone, helping engineers select and source the right PIC16F variant for their application.
Drop-in alternatives for PIC16F1778-I/SP — 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/SP (same form factor and footprint) — differing in ADC, Package, Timers, Mounting Type, I/O Pins.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1776-I/SP
✅ Drop-In✓ In Stock
$1.78 / Unit
View Datasheet →PIC16F1718-I/SP
✅ Drop-In✓ In Stock
$1.32 / Unit
View Datasheet →PIC16F1773-I/SP
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1713-I/SP
✅ Drop-In✓ In Stock
$1.65 / Unit
View Datasheet →PIC16F1708-I/P
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC16F1769-I/SP
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1778-I/SP Maximum Ratings & Electrical Characteristics
| Product Family | PIC16F177x (enhanced mid-range) |
| Architecture | 8-bit PIC16 RISC, Harvard bus |
| Program Memory (Flash) | 28 KB (16K x 14 words) |
| Data Memory (SRAM) | 2 KB |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 32 MHz (8 MIPS) |
| Instruction Set | 14-bit enhanced mid-range PIC16 |
| I/O Pins | 25 |
| ADC | 10-bit, with computation (ADC2) |
| DAC | 10-bit |
| Op-Amps | 4 internal |
| Comparators | High-speed comparators |
| PWM Channels | 10/16-bit PWMs with steering and complementary outputs |
| Timers | 8/16-bit timers |
| Communication | EUSART, SPI, I2C |
| Zero-Cross Detect | Yes |
| Programmable Ramp Generator | Yes |
| Peripheral Pin Select (PPS) | Yes |
| High-Current I/O | 100 mA |
| Operating Voltage | 2.3V to 5.5V |
| Operating Temperature | -40C to +85C (industrial, /I) |
| Package | 28-pin SPDIP (SP) |
| Mounting Type | Through-Hole |
| Programming/Debug | ICSP via PGD/PGC |
| RoHS Status | Compliant |
PIC16F1778-I/SP Pin Configuration
| Pin 1 | RA3/AN3/VREF+/CMP1IN+ — Analog input 3 / positive voltage reference / comparator 1 positive input |
| Pin 2 | RA4/T0CKI/CMP2OUT — Timer0 clock input / comparator 2 output |
| Pin 3 | RA5/AN4/CMP2IN+/SS — Analog input 4 / comparator 2 positive input / SPI slave select |
| Pin 4 | RA6/AN5 — Analog input 5 |
| Pin 5 | RA7/AN6 — Analog input 6 |
| Pin 6 | VSS — Ground reference |
| Pin 7 | RA0/AN0/CMP1OUT — Analog input 0 / comparator 1 output |
| Pin 8 | RA1/AN1/CMP1IN0- — Analog input 1 / comparator 1 negative input 0 |
| Pin 9 | RA2/AN2/CMP1IN1- — Analog input 2 / comparator 1 negative input 1 |
| Pin 10 | RC0/SOSCO — I/O port C0 / secondary oscillator output |
| Pin 11 | RC1/SOSCI — I/O port C1 / secondary oscillator input |
| Pin 12 | RC2/CCP1 — I/O port C2 / capture/compare/PWM 1 |
| Pin 13 | RC3/CCP2 — I/O port C3 / capture/compare/PWM 2 |
| Pin 14 | RC4 — I/O port C4 |
| Pin 15 | RC5 — I/O port C5 |
| Pin 16 | RC6/AN8 — I/O port C6 / analog input 8 |
| Pin 17 | RC7/AN9 — I/O port C7 / analog input 9 |
| Pin 18 | RB0/AN12 — I/O port B0 / analog input 12 |
| Pin 19 | RB1/AN10 — I/O port B1 / analog input 10 |
| Pin 20 | RB2/AN8 — I/O port B2 / analog input 8 |
| Pin 21 | RB3/AN9 — I/O port B3 / analog input 9 |
| Pin 22 | RB4 — I/O port B4 |
| Pin 23 | RB5 — I/O port B5 |
| Pin 24 | RB6/ICSPCLK/PGEC — I/O port B6 / ICSP clock / programming debug clock |
| Pin 25 | RB7/ICSPDAT/PGED — I/O port B7 / ICSP data / programming debug data |
| Pin 26 | VDD — Positive supply voltage (2.3V to 5.5V) |
| Pin 27 | RA0 — I/O port A0 (note: shared with pin 7 in alternate mapping) |
| Pin 28 | MCLR/VPP/RE3 — Master clear reset / programming voltage / I/O port E3 |
Typical Applications
PIC16F1778-I/SP is suitable for 6 applications: LED Lighting Drivers, Switch-Mode Power Supply (SMPS) Digital Control, Battery Charging (CC/CV Profiles), Brushed DC and Stepper Motor Control, Sensor Signal Conditioning and IoT Edge Nodes, General-Purpose Mixed-Signal Embedded Control.
LED Lighting Drivers
The PIC16F1778-I/SP's integrated four op-amps, high-speed comparators, programmable ramp generator, and 16-bit PWMs with complementary outputs make it a strong fit for constant-current LED drivers and RGBW color-mixing fixtures. The op-amps directly sense LED current through shunt resistors while the comparators provide fast over-current protection within microseconds. The 10-bit ADC with computation (ADC2) handles temperature monitoring for thermal foldback, and the 32MHz CPU runs PID loops for closed-loop dimming. PPS allows PWM outputs to be remapped to any I/O pin, simplifying multi-channel LED board layout versus fixed-pin architectures.
Recommended
Switch-Mode Power Supply (SMPS) Digital Control
The PIC16F1778-I/SP fits digital SMPS control loops including PFC, LLC, and synchronous buck converters. Its high-speed comparators (50ns response) detect inductor zero-current for boundary-conduction mode, while the programmable ramp generator creates slope compensation for current-mode control. The 16-bit PWM with 7.8ns resolution at 32MHz drives MOSFET gates directly or through a gate driver, and the 10-bit DAC provides analog reference for closed-loop voltage regulation. The op-amps condition current-sense signals, eliminating external instrumentation amplifiers. With 28KB Flash, firmware accommodates multiple control algorithms and adaptive dead-time compensation.
Recommended
Battery Charging (CC/CV Profiles)
For lithium-ion, lead-acid, and NiMH chargers, the PIC16F1778-I/SP provides 10-bit ADC2 for precise battery voltage and current measurement, 16-bit PWMs for switching converter control, and EEPROM storage for charging profiles across multiple battery chemistries. The op-amps condition current-sense signals for the constant-current loop, while the high-speed comparator triggers safety cutoff on fault conditions. The 256-byte EEPROM stores learned capacity and cycle-count data. XLP sleep modes reduce quiescent current to microamps between charge cycles, extending shelf life in standby chargers. PPS simplifies routing the PWM, ADC, and comparator signals on space-constrained PCBAs.
Recommended
Brushed DC and Stepper Motor Control
The PIC16F1778-I/SP drives brushed DC motors, unipolar stepper motors, and small BLDC fans using its 16-bit PWMs with complementary outputs and dead-band control. The integrated op-amps condition back-EMF and current-sense signals for closed-loop speed control, while the high-speed comparators provide hardware overcurrent protection that bypasses CPU latency. The 32MHz CPU executes field-oriented control or trapezoidal commutation algorithms at adequate sample rates for motors up to several hundred watts. With 2KB SRAM, lookup tables for sine commutation and PI controller state fit comfortably in working memory.
Recommended
Sensor Signal Conditioning and IoT Edge Nodes
The PIC16F1778-I/SP integrates four op-amps that condition sensor signals (thermocouples, RTDs, strain gauges, pH probes) without external instrumentation amplifiers, reducing BOM cost and PCB area. The 10-bit ADC2 with computation performs hardware averaging and threshold comparison, offloading the CPU from polling loops. EUSART, SPI, and I2C connect to digital sensors, displays, and wireless modules. XLP sleep modes drop quiescent current to a few microamps between sensor reads, enabling multi-year battery life in remote IoT sensor nodes. The 28KB Flash accommodates wireless protocol stacks and over-the-air firmware update bootloaders.
Recommended
General-Purpose Mixed-Signal Embedded Control
Beyond power conversion and lighting, the PIC16F1778-I/SP serves as a versatile mixed-signal controller for HVAC controls, industrial sensors, smart appliances, and consumer electronics. Its 25 I/O pins with PPS allow flexible pin assignment for SPI displays, I2C sensors, UART connectivity, and discrete control signals. The 32MHz CPU and 28KB Flash handle communication protocols (Modbus, LIN, custom), user interfaces, and supervisory logic. The 256-byte EEPROM stores user settings and calibration constants that persist across power cycles. The industrial -40C to +85C temperature range supports outdoor and factory-floor deployments.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1778-I/SP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1776-I/SP | PIC16F1718-I/SP | PIC16F1773-I/SP | PIC16F1713-I/SP | PIC16F1708-I/P | PIC16F1769-I/SP |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SPDIP | 28-SPDIP (same) | 28-SPDIP (same) | 28-SPDIP (same) | 28-SPDIP (same) | 28-PDIP (wider DIP, same pinout) | 28-SPDIP (same) |
| Program Memory (Flash) | 28 KB | 28 KB | 28 KB | 28 KB | 28 KB | 28 KB | 28 KB |
| Data Memory (SRAM) | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| CPU Speed | 32 MHz (8 MIPS) | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Op-Amps | 4 | 3 | 0 | 3 | 0 | 0 | 2 |
| 10-bit DAC | Yes | Yes | Yes | Yes | Yes | No | Yes |
| Programmable Ramp Generator | Yes | Yes | No | Yes | No | No | Yes |
| I/O Pins | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
| Operating Voltage | 2.3V to 5.5V | 2.3V to 5.5V | 2.3V to 5.5V | 2.3V to 5.5V | 2.3V to 5.5V | 2.3V to 5.5V | 2.3V to 5.5V |
Key Differentiators
- Full set of intelligent analog peripherals (4 op-amps, PRG, 10-bit DAC) (vs PIC16F1718-I/SP)
- Higher op-amp count than closest family member (vs PIC16F1776-I/SP)
- On-chip high-speed comparators for hardware protection (vs PIC16F1708-I/P)
Design Notes
The PIC16F1778-I/SP operates from 2.3V to 5.5V and draws approximately 8mA active at 32MHz with all peripherals enabled. Place a 100nF decoupling capacitor within 5mm of the VDD pin and a bulk 10uF capacitor near the supply input. For battery-powered designs, XLP sleep modes drop quiescent current to a few microamps; disable unused peripherals via PMD registers before entering sleep. The internal LDO does not require an external bypass.
Do not leave the MCLR pin floating; tie it to VDD through a 10kohm resistor with a 100nF cap to ground for noise immunity, or directly to VDD if reset is not needed. The PGD/PGC pins (RB6/RB7) are shared with ICSP and must remain accessible for in-circuit programming - do not connect heavy loads or pull-down resistors that exceed the 25mA source/sink limit of these pins. The 28-SPDIP package requires through-hole soldering; wave-soldering profile should not exceed 260C peak for 10 seconds.
Route analog signals (ANx, op-amp inputs) away from PWM outputs and digital switching lines to minimize crosstalk. Place the analog reference capacitor within 5mm of the VREF+ pin if used. For PWM-driven applications, keep gate-drive traces short and use a ground plane under PWM outputs to reduce radiated EMI. The ICSP header should be a 5-pin 0.1-inch header with VDD, VSS, PGD, PGC, and MCLR for production programming access.
Compliance Information
Industrial temperature range -40C to +85C. RoHS compliant per Microchip product page. Not AEC-Q100 qualified; for automotive applications choose PIC16F1778-E/SP or PIC16F1778T-I/SP variants.
