PIC16F1778T-I/SO - 8-bit XLP MCU, 28KB Flash, 32MHz | Microchip
MPN： PIC16F1778T-I/SO ✓ 啟用中PIC16F1778T-I/SO 概覽
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.
直接替換替代品，適用於 PIC16F1778T-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： PIC16F1778T-I/SO （相同外形與佔位） — 差異在於 Core Architecture, Package, Program Memory (Flash), ADC, DAC.
PIC16F1778-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16F1779-I/SO
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16F1776-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16F1769-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16F1768-I/SO
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PIC16F1719-I/SO
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PIC16F1778T-I/SO 最大額定值與電氣特性
| 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 |
| 封裝 | 28-SOIC (0.295 inch / 7.50 mm body width) |
| 工作溫度範圍 | -40 C to +85 C (industrial, -I suffix) |
| 安裝類型 | Surface Mount |
| MSL 等級 | MSL 1 (per JEDEC J-STD-020, unlimited floor life) |
| RoHS 狀態 | Compliant |
| Lead-Free / Halogen-Free | Lead-free |
PIC16F1778T-I/SO 腳位配置
| 腳位 1 | RA5/VCAP/T1CKI — Port A bit 5 / voltage regulator capacitor / Timer1 clock input |
| 腳位 2 | RA4/OPA1OUT — Port A bit 4 / Op-amp 1 output |
| 腳位 3 | RA3/OPA1IN1+ — Port A bit 3 / Op-amp 1 non-inverting input |
| 腳位 4 | RA2/OPA1IN1-/DAC1REF+ — Port A bit 2 / Op-amp 1 inverting input / DAC1 reference+ |
| 腳位 5 | RA1/OPA1IN2-/DAC1REF- — Port A bit 1 / Op-amp 1 inverting input / DAC1 reference- |
| 腳位 6 | RA0/OPA1IN3+ — Port A bit 0 / Op-amp 1 non-inverting input |
| 腳位 7 | VSS — Ground reference |
| 腳位 8 | VDD — Positive supply voltage (2.4V-5.5V) |
| 腳位 9 | RB7/ICSPDAT — Port B bit 7 / ICSP data |
| 腳位 10 | RB6/ICSPCLK — Port B bit 6 / ICSP clock |
| 腳位 11 | RB5 — Port B bit 5 |
| 腳位 12 | RB4 — Port B bit 4 |
| 腳位 13 | RB3/CPP2 — Port B bit 3 / comparator 2 positive input |
| 腳位 14 | RB2/CPP1 — Port B bit 2 / comparator 1 positive input |
| 腳位 15 | RB1/C1IN1-/AN10 — Port B bit 1 / comparator 1 negative input / ADC10 |
| 腳位 16 | RB0/AN12 — Port B bit 0 / ADC12 |
| 腳位 17 | AVSS — Analog ground |
| 腳位 18 | AVDD — Analog positive supply |
| 腳位 19 | RC7 — Port C bit 7 |
| 腳位 20 | RC6 — Port C bit 6 |
| 腳位 21 | RC5 — Port C bit 5 |
| 腳位 22 | RC4 — Port C bit 4 |
| 腳位 23 | RC3 — Port C bit 3 |
| 腳位 24 | RC2 — Port C bit 2 |
| 腳位 25 | RC1/AN15 — Port C bit 1 / ADC15 |
| 腳位 26 | RC0/AN16 — Port C bit 0 / ADC16 |
| 腳位 27 | OSC2/RA6 — Oscillator output / Port A bit 6 |
| 腳位 28 | OSC1/RA7/MCLR — Oscillator input / Port A bit 7 / Master Clear (reset) |
典型應用
PIC16F1778T-I/SO 適用於 6 應用s: 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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16F1778T-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 | 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 |
主要差異化特點
- Highest analog peripheral integration in the PIC16 28-pin SOIC class (對比PIC16F1769-I/SO)
- Lower Flash density than PIC16F1779 for cost-sensitive applications (對比PIC16F1779-I/SO)
- XLP ultra-low-power sleep mode below 50 nA typical (對比PIC16F1768-I/SO)
設計說明
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).
合規資訊
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.
