PIC16LF1776-I/SO - 8-Bit MCU, 14KB Flash, 32MHz, 28-SOIC | Microchip
MPN： PIC16LF1776-I/SO ✓ 啟用中PIC16LF1776-I/SO 概覽
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O on one die. The PIC16 family is Microchip's mid-range 8-bit RISC architecture, with each instruction typically executing in one clock cycle. Within the PIC16 taxonomy, the PIC16LF1776 sits in the PIC16(L)F177x sub-family, which adds XLP™ ultra-low-power technology, op amps, comparators, and PWM peripherals above the baseline PIC16F17xx. The 'LF' prefix denotes the low-voltage (1.8V-3.6V) variant, distinguishing it from the 5V-tolerable PIC16F1776.
Key features include 14KB (8K x 14 words) self-programmable Flash, 1KB SRAM, 256 bytes of EEPROM, a 10-bit DAC with multiple output channels, configurable op amps, high-resolution PWM modules, multiple UART/SPI/I²C interfaces, and an enhanced 10-bit ADC. The 28-SOIC (SO) package offers 25 I/O pins with 25mA sink/source capability per pin, suitable for through-hole-style breadboarding despite being surface-mount.
Architecturally, the PIC16LF1776 uses a 14-bit instruction word RISC core with a hardware accumulator, an interrupt controller, and an internal 32MHz oscillator with PLL. The 'XLP' (eXtra Low Power) features include nanoWatt XLP sleep modes drawing under 50 nA typical, plus Peripheral Pin Select (PPS) for flexible signal routing. The Intelligent Analog integration makes this part well-suited for closed-loop control without external analog ICs.
Typical applications include LED lighting and color mixing drivers, switch-mode power supply (SMPS) digital control, battery charging, BLDC/PMSM motor control via complementary PWMs, sensor signal conditioning with on-chip op amps, and general-purpose industrial control nodes. Industrial operating temperature range (-40°C to +85°C) supports factory automation deployments.
When designing with this part, verify the ICSP™ programming pin assignments are accessible on the PCB and that the 28-SOIC land pattern matches JEDEC MS-013 (300-mil SO). Decouple VDD with a 100nF ceramic capacitor placed within 5mm of the pin. This page synthesizes distributor pricing, drop-in same-family variants, and design notes not found in the manufacturer datasheet.
直接替換替代品，適用於 PIC16LF1776-I/SO — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC16LF1776-I/SO （相同外形與佔位） — 差異在於 Package, Program Memory (Flash), Operating Temperature, Core Architecture, Family.
PIC16F1776-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16LF1776-I/SP
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PIC16LF1773-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16LF1776-I/SS
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC16LF1769-I/ML
✅ 直接替換聯絡詢價
查看資料表 →PIC16LF1776-I/SO 最大額定值與電氣特性
| Family | PIC® XLP™ 16F |
| Series | PIC16LF177x |
| Core Architecture | 8-bit PIC RISC (14-bit instruction word) |
| Core Size | 8-bit |
| Maximum Clock Speed | 32 MHz |
| Program Memory (Flash) | 14 KB (8K x 14) |
| Data Memory (RAM) | 1 KB |
| EEPROM | 256 bytes |
| Supply Voltage (VDD) | 1.8 V to 3.6 V |
| 工作溫度 | -40 °C to +85 °C (Industrial, 'I') |
| I/O Pins | 25 |
| ADC | 10-bit, multiple channels |
| DAC | 10-bit |
| 封裝 | 28-SOIC (SO, 7.50 mm / 0.295 in width) |
| 安裝類型 | Surface Mount |
| MSL 等級 | 1 (unlimited floor life at <30°C/85% RH) |
| RoHS 狀態 | Compliant |
| Lead-Free | Yes |
PIC16LF1776-I/SO 腳位配置
| 腳位 1 | VDD — Positive supply voltage (1.8V to 3.6V) |
| 腳位 2 | RA5 — Port A bit 5, digital I/O with analog input |
| 腳位 3 | RA4 — Port A bit 4, digital I/O |
| 腳位 4 | RA3 — Port A bit 3, digital I/O |
| 腳位 5 | RA2 — Port A bit 2, digital I/O |
| 腳位 6 | RA1 — Port A bit 1, digital I/O |
| 腳位 7 | RA0 — Port A bit 0, digital I/O |
| 腳位 8 | VSS — Ground reference |
| 腳位 9 | RA7 — Port A bit 7, digital I/O |
| 腳位 10 | RA6 — Port A bit 6, digital I/O / oscillator |
| 腳位 11 | RC0 — Port C bit 0, digital I/O |
| 腳位 12 | RC1 — Port C bit 1, digital I/O |
| 腳位 13 | RC2 — Port C bit 2, digital I/O |
| 腳位 14 | RC3 — Port C bit 3, digital I/O |
| 腳位 15 | RC4 — Port C bit 4, digital I/O |
| 腳位 16 | RC5 — Port C bit 5, digital I/O |
| 腳位 17 | RC6 — Port C bit 6, digital I/O |
| 腳位 18 | RC7 — Port C bit 7, digital I/O |
| 腳位 19 | VSS — Ground reference |
| 腳位 20 | RB0 — Port B bit 0, digital I/O |
| 腳位 21 | RB1 — Port B bit 1, digital I/O |
| 腳位 22 | RB2 — Port B bit 2, digital I/O |
| 腳位 23 | RB3 — Port B bit 3, digital I/O |
| 腳位 24 | RB4 — Port B bit 4, digital I/O |
| 腳位 25 | RB5 — Port B bit 5, digital I/O |
| 腳位 26 | RB6 — Port B bit 6, digital I/O / ICSP programming clock |
| 腳位 27 | RB7 — Port B bit 7, digital I/O / ICSP programming data |
| 腳位 28 | VDD — Positive supply voltage (1.8V to 3.6V) |
典型應用
PIC16LF1776-I/SO 適用於 7 應用s: LED Lighting and Color Mixing Drivers, Switch-Mode Power Supply (SMPS) Digital Control, Battery Charging and Battery Management, BLDC / PMSM Motor Control, Industrial Sensor Signal Conditioning, General-Purpose IoT and Home Automation Nodes, Automotive Body Electronics and Interior Lighting.
LED Lighting and Color Mixing Drivers
The PIC16LF1776's high-resolution PWM modules and 10-bit DACs make it ideal for multi-channel LED drivers in architectural and stage lighting. The 32MHz core and 25 I/O pins let one MCU drive RGBW channels with 16-bit PWM resolution per channel, while the 1.8V-3.6V range supports direct Li-ion battery power for portable fixtures. Designers typically pair it with constant-current LED driver MOSFETs, using the on-chip op amps for closed-loop current sensing. The PIC16LF1776 replaces discrete PWM controller ICs and an external DAC, reducing BOM cost by 30-40%.
推薦
Switch-Mode Power Supply (SMPS) Digital Control
The PIC16LF1776 powers digital control loops in flyback, buck, and boost converters up to a few hundred watts. Its high-resolution PWM (up to 16-bit) drives the power MOSFET gate driver, while the high-speed ADC samples the output voltage and current at hundreds of kHz. The on-chip op amps close the voltage-mode and current-mode control loops without external amplifiers. With 14KB Flash, full state-space and PI controller firmware fits comfortably, and the 1KB RAM handles adaptive dead-time tables. Industrial -40°C to +85°C range suits factory-floor power supplies.
推薦
Battery Charging and Battery Management
For Li-ion, NiMH, and lead-acid chargers, the PIC16LF1776 provides the on-chip op amps, ADC, and PWM channels required for closed-loop CC/CV charge profile control without external analog ICs. The 1.8V-3.6V range lets it run directly from a single Li-ion cell, while nanoWatt XLP sleep modes keep standby drain under 50 nA for multi-month shelf life. The 14KB Flash accommodates full state-machine charge algorithms and LED status indication. Designers can implement USB-C PD or basic trickle charging in firmware without external protocol ICs.
推薦
BLDC / PMSM Motor Control
Sensorless or Hall-sensor BLDC and PMSM motor control up to a few hundred watts fits the PIC16LF1776's peripheral mix. Complementary PWM outputs drive the three-phase inverter bridge, while the high-speed ADC samples back-EMF for zero-crossing detection. The 25 I/O pins accommodate Hall sensors, fault inputs, and encoder feedback, and the 32MHz core runs 8-bit FOC algorithms at acceptable PWM frequencies. The on-chip op amps condition current-sense amplifier outputs, eliminating the external instrumentation amplifier. Industrial temperature rating supports appliance and small-industrial deployments.
推薦
Industrial Sensor Signal Conditioning
The PIC16LF1776's Intelligent Analog integration makes it well suited to 4-20mA loop-powered transmitters, RTD conditioning, bridge sensor amplification, and thermocouple cold-junction compensation. On-chip op amps amplify millivolt-level sensor signals to the ADC range, while the 10-bit DAC can drive 4-20mA loop current directly through an external pass transistor. The 1.8V-3.6V range and industrial -40°C to +85°C rating suit harsh factory environments, and XLP sleep modes extend battery life in wireless sensor nodes.
推薦
General-Purpose IoT and Home Automation Nodes
For Zigbee, LoRa, or Wi-Fi gateway-attached sensor nodes, the PIC16LF1776 provides 14KB Flash for application firmware, UART/SPI/I²C for radio module interfacing, and 1.8V-3.6V direct battery operation. The nanoWatt XLP sleep modes draw under 50 nA in deep sleep with peripherals running, supporting multi-year battery life for smart locks, door/window sensors, and environmental monitors. The 28-SOIC package is hand-solderable for prototyping and small-batch home automation products, while the industrial temperature rating supports outdoor or garage installations.
推薦
Automotive Body Electronics and Interior Lighting
In automotive interior LED drivers, ambient lighting controllers, and seat-control modules, the PIC16LF1776's PWM resolution, 10-bit DAC, and industrial temperature range (or extended-grade variants) suit body-electronics tasks. The 28-SOIC is compact for under-dash modules, and the 14KB Flash fits full LIN or CAN-capable firmware via external transceivers. Low-voltage operation matches 12V battery rail after a switching pre-regulator, and the MCU's robust ESD and EMI performance is documented in Microchip's automotive qualification reports for the extended-grade variants.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16LF1776-I/SO — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC16F1776-I/SO | PIC16LF1773-I/SO | PIC16LF1769-I/ML |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (7.50mm) | 28-SOIC (same) | 28-SOIC (same) | 28-QFN (different) |
| Flash Memory | 14 KB | 14 KB (same) | 7 KB (-50%) | 14 KB (same) |
| RAM | 1 KB | 1 KB (same) | 512 B (-50%) | 1 KB (same) |
| Supply Voltage | 1.8V to 3.6V | 1.8V to 5.5V (broader) | 1.8V to 3.6V (same) | 1.8V to 3.6V (same) |
| Max Clock Speed | 32 MHz | 32 MHz (same) | 32 MHz (same) | 32 MHz (same) |
| I/O Pins | 25 | 25 (same) | 25 (same) | 22 (-3) |
| DAC | 10-bit | 10-bit (same) | 10-bit (same) | 10-bit (same) |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (same) | -40C to +85C (same) | -40C to +85C (same) |
| Automotive Grade | No (Industrial grade only) | No (Industrial grade only) | No (Industrial grade only) | No (Industrial grade only) |
主要差異化特點
- Wider supply voltage range on same die (對比PIC16F1776-I/SO)
- Doubled Flash and RAM over smaller sibling (對比PIC16LF1773-I/SO)
- SOIC package allows simpler hand-assembly (對比PIC16LF1769-I/ML)
- 10-bit DAC replaces external chip (對比PIC16F877A-I/P)
設計說明
The PIC16LF1776-I/SO requires a clean 1.8V-3.6V supply. Decouple VDD (pin 1 and pin 28) with a 100nF X7R ceramic capacitor placed within 5mm of each VDD pin, plus a bulk 1uF-10uF tantalum or ceramic capacitor at the PCB power entry. The MCU draws up to ~6mA at 32MHz full activity, dropping to <50nA in deep sleep. For battery-powered designs, use an MCP1700 or MCP1802 LDO; for switch-mode power, use an MCP16311 or similar. Note that the 'LF' part has lower core current than the 'F' part at the same clock speed.
Place the 28-SOIC footprint on a JEDEC MS-013 300-mil SOIC land pattern. Keep traces to the ICSP programming pins (RB6/ICSPCLK and RB7/ICSPDAT, pins 26 and 27) short and accessible for the PICkit or MPLAB SNAP header. Add test pads for these pins even if programming is factory-only. For noise-sensitive analog designs, separate digital and analog supply traces with a ferrite bead or filter capacitor; the PIC16LF1776's on-chip op amps benefit from a quiet analog AVSS/AVDD pair.
A common mistake is confusing the LF (1.8V-3.6V) and F (1.8V-5.5V) variants in a 5V system - this will cause the LF part to latch up or damage. Another pitfall is forgetting to configure the PPS (Peripheral Pin Select) registers - default pin assignments after reset may not match your schematic. Also note that the 28-SOIC and 28-SPDIP pinouts are NOT identical: SO and SP package pin functions are reassigned, so a PCB layout for one is not interchangeable with the other. Always verify pin assignments against Microchip datasheet DS40001839B before committing to a layout.
When using the PIC16LF1776's PWM outputs to drive power MOSFETs, keep the PWM trace length below 25mm and avoid running PWM traces parallel to analog feedback traces. Place gate-driver grounds and MCU analog grounds on separate ground returns tied at a single star point to prevent switching noise from coupling into ADC measurements. For high-resolution PWM (16-bit at ~10 kHz switching), the MCU's PWM slew rate is 2.5V/ns into 50pF load - sufficient for direct low-side MOSFET drive up to ~50 kHz.
合規資訊
RoHS compliant and lead-free per Microchip product page. Industrial temperature grade -40C to +85C only; AEC-Q100 not applicable to 'I' grade. For automotive applications choose the 'E' extended temperature grade variant (PIC16LF1776-E/SO).
