PIC16F1778T-I/SS - 28KB Flash 8-bit MCU 28-SSOP | Microchip
MPN: PIC16F1778T-I/SS ✓ Hoạt độngPIC16F1778T-I/SS Tóm tắt
A microcontroller (MCU) is a single-chip computer containing a CPU, memory, and programmable I/O peripherals. The 8-bit PIC architecture executes one instruction per cycle (except branches), delivering deterministic real-time performance with low power consumption. PIC microcontrollers sit within the broader hierarchy of embedded processors -> microcontrollers -> 8-bit microcontrollers -> PIC family -> PIC16F sub-family, and they are widely used in cost-sensitive, low-power, and safety-oriented applications such as lighting, power supplies, and motor control.
Key features of the PIC16F1778 include a 10-bit ADC, multiple 10-bit and 16-bit PWMs, operational amplifiers, high-speed comparators, zero-cross detection, a programmable ramp generator, and peripheral pin select (PPS) for flexible signal routing. The 100 mA high-current I/O drivers can directly drive LEDs, relays, and FET gates without external buffers, reducing BOM cost. The integrated op-amps, comparators, and DAC remove the need for many external analog components.
Technically, the device uses a Harvard RISC core with a 14-bit instruction word, 16-level hardware stack, and nanoWatt XLP extreme-low-power technology for battery-powered applications. Communication is supported through SPI, I2C, and EUSART (enhanced USART with auto-baud and LIN support), enabling connection to sensors, displays, RF modules, and host processors.
Typical applications include LED lighting and color-mixing drivers, switched-mode power supplies with PFC, battery chargers, BLDC and stepper motor control, and general-purpose embedded control. The combination of analog peripherals and high-current I/O makes it especially attractive for closed-loop power conversion and lighting ballast designs where a single chip replaces multiple discrete controllers.
When designing with this part, pay attention to the SSOP package thermal limits under high I/O current loads, and use Microchip's MPLAB X IDE with XC8 compiler for development. For drop-in alternatives within the same 28-SSOP footprint and feature set, consult the alternatives listed below; several PIC16F1778 variants and PIC16F1769/1768 derivatives in 28-SSOP provide compatible pinouts.
This page synthesizes distributor pricing, drop-in alternatives within the 28-SSOP family, and practical design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16F1778T-I/SS — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC16F1778T-I/SS (cùng hình factor và footprint) — khác nhau ở ADC, Package, DAC, Program Memory (Flash), Operating Temperature.
PIC16F1778-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F1769-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F1709-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F1778T-I/SS Tỷ lệ tối đa & tính chất điện
| Core | PIC 8-bit RISC (14-bit instruction word) |
| Program Memory (Flash) | 28 KB (16K x 14 words) |
| Data SRAM | 2 KB |
| Data EEPROM | 256 bytes |
| Tần số xung maksimum | 32 MHz |
| Operating Voltage Range | 1.8 V to 5.5 V |
| ADC | 10-bit, multiple channels |
| DAC | 10-bit |
| PWM | 10/16-bit, multiple channels |
| High-Speed Comparators | Yes |
| Operational Amplifiers | Yes (on-chip) |
| Zero-Cross Detection | Yes |
| Programmable Ramp Generator | Yes |
| Peripheral Pin Select (PPS) | Yes |
| I/O Drive Strength | 100 mA high-current capable |
| Communication | SPI, I2C, EUSART (LIN-capable) |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial) |
| Hộp | 28-pin SSOP (5.30 mm body width) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Cấu hình chân PIC16F1778T-I/SS
| Chân 1 | MCLR/RE3 — Master Clear (Reset) input or digital input-only RE3 |
| Chân 2 | RA0 — Port A bit 0 (analog/digital/PPS-capable) |
| Chân 3 | RA1 — Port A bit 1 (analog/digital/PPS-capable) |
| Chân 4 | RA2 — Port A bit 2 (analog/digital/PPS-capable) |
| Chân 5 | RA3 — Port A bit 3 (analog/digital/PPS-capable, input-only on some PICs) |
| Chân 6 | RA4 — Port A bit 4 (analog/digital/PPS-capable) |
| Chân 7 | RA5 — Port A bit 5 (analog/digital/PPS-capable) |
| Chân 8 | VSS — Ground reference |
| Chân 9 | RA7 — Port A bit 7 (analog/digital/PPS-capable, OSC1 on some configs) |
| Chân 10 | RA6 — Port A bit 6 (analog/digital/PPS-capable, OSC2 on some configs) |
| Chân 11 | RC0 — Port C bit 0 (analog/digital/PPS-capable) |
| Chân 12 | RC1 — Port C bit 1 (analog/digital/PPS-capable) |
| Chân 13 | RC2 — Port C bit 2 (analog/digital/PPS-capable) |
| Chân 14 | RC3 — Port C bit 3 (analog/digital/PPS-capable) |
| Chân 15 | RC4 — Port C bit 4 (analog/digital/PPS-capable) |
| Chân 16 | RC5 — Port C bit 5 (analog/digital/PPS-capable) |
| Chân 17 | RC6 — Port C bit 6 (analog/digital/PPS-capable, TX/CK) |
| Chân 18 | RC7 — Port C bit 7 (analog/digital/PPS-capable, RX/DT) |
| Chân 19 | VSS — Ground reference (secondary) |
| Chân 20 | VDD — Positive supply voltage (1.8 V to 5.5 V) |
| Chân 21 | RB0 — Port B bit 0 (analog/digital/PPS-capable, interrupt-on-change) |
| Chân 22 | RB1 — Port B bit 1 (analog/digital/PPS-capable, interrupt-on-change) |
| Chân 23 | RB2 — Port B bit 2 (analog/digital/PPS-capable, interrupt-on-change) |
| Chân 24 | RB3 — Port B bit 3 (analog/digital/PPS-capable, interrupt-on-change) |
| Chân 25 | RB4 — Port B bit 4 (analog/digital/PPS-capable, interrupt-on-change) |
| Chân 26 | RB5 — Port B bit 5 (analog/digital/PPS-capable, interrupt-on-change, ICSP PG) |
| Chân 27 | RB6 — Port B bit 6 (analog/digital/PPS-capable, ICSP PGC, ICD clock) |
| Chân 28 | RB7 — Port B bit 7 (analog/digital/PPS-capable, ICSP PGD, ICD data) |
Ứng dụng tiêu biểu
PIC16F1778T-I/SS phù hợp cho 6 Áp dụngs: LED Lighting and Color-Mixing Drivers, Switched-Mode Power Supplies (SMPS) with PFC, Battery Chargers and Battery Management, BLDC and Stepper Motor Control, General-Purpose Embedded Control, Industrial Sensor Conditioning and Signal Acquisition.
LED Lighting and Color-Mixing Drivers
The PIC16F1778T-I/SS fits LED lighting drivers because its integrated 16-bit PWMs, op-amps, comparators, and 100 mA high-current I/O can directly drive multi-channel LED strings without external gate drivers. With 28 KB of Flash and 2 KB of RAM, the MCU can host DALI, DMX, or Bluetooth Mesh stacks alongside closed-loop current regulation firmware. The 10-bit DAC and zero-cross detection enable phase-controlled dimming and analog color-temperature tuning.
Được đề xuất
Switched-Mode Power Supplies (SMPS) with PFC
For SMPS designs with power factor correction, the PIC16F1778T-I/SS offers the on-chip op-amps for current sensing, high-speed comparators for cycle-by-cycle current limit, programmable ramp generator for slope compensation, and 16-bit PWMs for digital PFC control loops. Its 32 MHz clock and 10-bit ADC support 100 kHz+ switching frequencies, and the 1.8-5.5 V supply range lets the MCU share the auxiliary rail without extra regulators.
Được đề xuất
Battery Chargers and Battery Management
In battery charger applications, the PIC16F1778T-I/SS provides the 10-bit ADC for precise voltage and current telemetry, op-amps for sense-amplifier integration, and PWMs for synchronous buck converter control. The nanoWatt XLP low-power modes extend standby time when the charger is idle, and the EUSART (with LIN) simplifies telemetry to a master BMS. The 28 KB Flash supports multi-chemistry charge profiles (Li-ion, NiMH, lead-acid) in one firmware image.
Được đề xuất
BLDC and Stepper Motor Control
The PIC16F1778T-I/SS supports sensorless BLDC and stepper motor control via its 16-bit PWMs (with complementary outputs and dead-band control), high-speed comparators for back-EMF zero-cross detection, and on-chip op-amps for current sensing. The peripheral pin select (PPS) reassigns PWM outputs at runtime, simplifying PCB routing on multi-motor boards. At 32 MHz, the MCU can close 20 kHz current loops with margin for housekeeping tasks.
Được đề xuất
General-Purpose Embedded Control
For general embedded control, the PIC16F1778T-I/SS brings 28 KB Flash, 2 KB RAM, SPI/I2C/EUSART, and PPS routing to drive sensor hubs, HVAC dampers, and small appliances. The industrial temperature range and 5.5 V tolerance allow direct connection to 5 V sensors and actuators. Combined with on-chip op-amps and comparators, the MCU often replaces 2-3 discrete analog ICs, reducing BOM cost and PCB area in compact products.
Được đề xuất
Industrial Sensor Conditioning and Signal Acquisition
Industrial sensor conditioning leverages the PIC16F1778T-I/SS integrated op-amps, 10-bit ADC, and 10-bit DAC to amplify, filter, and digitize signals from thermocouples, RTDs, and bridge pressure sensors. The on-chip comparators provide fast threshold detection for safety shutoff, while the EUSART streams telemetry to a host PLC. The 28-SSOP package is suitable for both hand-soldered prototypes and SMT production runs.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16F1778T-I/SS — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC16F1778-I/SS | PIC16F1769-I/SS | PIC16F1709-I/SS |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Flash Memory | 28 KB | 28 KB | 14 KB (-50%) | 14 KB (-50%) |
| SRAM | 2 KB | 2 KB | 1 KB (-50%) | 1 KB (-50%) |
| Maximum Clock | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| On-chip Op-Amps | Yes | Yes | Yes | No |
| High-Speed Comparators | Yes | Yes | Yes | Yes |
| PWM Resolution | 10/16-bit | 10/16-bit | 10/16-bit | 10-bit |
| I/O Drive Strength | 100 mA | 100 mA | 100 mA | 100 mA |
| Unit Price (qty 1) | $2.84 | ~$2.84 | ~$2.10 (estimated lower) | ~$1.85 (estimated lower) |
Bảo phân biệt quan trọng
- Highest Flash density in the 28-SSOP PIC16F177x family (vsPIC16F1769-I/SS)
- Includes on-chip operational amplifiers (vsPIC16F1709-I/SS)
- Higher PWM resolution on selected channels (vsPIC16F1709-I/SS)
Ghi chú thiết kế
The 28-SSOP package has a typical theta_JA of approximately 80-100 C/W on a standard 4-layer JEDEC test board. When driving high-current I/O pins at 100 mA continuously, total package dissipation can exceed 800 mW and push the junction temperature toward the 150 C absolute maximum. Provide at least 100 mm^2 of top-layer copper pour around the SSOP body, and avoid sustained simultaneous high-current drive on adjacent pins to keep junction temperature within safe limits.
Decouple VDD (pin 20) with a 100 nF ceramic capacitor placed within 3 mm of the pin, plus a bulk 1-10 uF tantalum or ceramic capacitor on the same node. Use a separate analog supply (AVDD) if your design references the ADC and route the analog ground (AVSS/VSS) as a star connection back to the main ground. Keep switching signals (PWM, ICSP clock) away from the analog op-amp inputs to minimize coupled noise.
Do not assume that PIC16F1778, F1776, and F1769 are interchangeable in firmware - the Flash sizes differ (28 KB vs 14 KB vs 14 KB) and link errors will appear if code exceeds the target's memory map. Also, the F1778 in 28-SSOP is NOT pin-compatible with the 28-SPDIP (-/SP) or 28-SOIC (-/SO) variants; those have different physical footprints even though the pin numbering looks similar.
Peripheral Pin Select (PPS) lets you remap digital peripherals to any digital-capable pin, but analog functions are NOT remappable. If your firmware expects a PWM output on RC1 but your PCB routes it to RA2, use PPS to remap - the alternative is to spin a new PCB. Document the PPS assignments in your code header so firmware updates do not silently break pin mappings.
Thông tin tuân thủ
Industrial temperature grade (-40 C to +85 C). Standard Microchip RoHS/REACH compliance applies. Not AEC-Q100 qualified; choose AEC-Q100 screened variants for automotive. MSL level not confirmed in verified data - see [DATA_NEEDED] in specs.
