ATTINY816-SF - 20MHz 8KB AVR MCU | Microchip Technology
MPN: ATTINY816-SF ✓ Hoạt độngATTINY816-SF Tóm tắt
An 8-bit AVR microcontroller is a compact embedded-processing component that executes firmware, samples analog signals, controls digital outputs, and manages system peripherals. The ATTINY816 belongs to the tinyAVR 1-series, a low-power branch of the AVR family that combines an event-driven architecture, core-independent peripherals, and picoPower technology. This hierarchy places the device between general-purpose embedded control and highly integrated low-power sensing designs.
The ATTINY816-SF's 20 MHz maximum clock speed supports faster control-loop execution and more responsive peripheral servicing than lower-frequency 8-bit devices. Its 8 KB Flash capacity provides room for application firmware, while 512 bytes of SRAM support working variables and data buffers. The 128-byte EEPROM supports nonvolatile parameters. A 10-bit ADC and 18 I/O positions suit compact analog-measurement and discrete-control products.
Microchip's tinyAVR architecture uses hardware events to connect timers, analog functions, and I/O ports without requiring continuous polling. Core Independent Peripherals allow selected functions to operate while the CPU is idle, and SleepWalking can support responsive low-power behavior. These characteristics make the ATTINY816 useful when a conventional MCU would consume unnecessary power while waiting for an external event.
Typical uses include industrial control modules, compact sensor nodes, building automation, appliance controls, lighting modules, and compact instrumentation. The combination of 20-pin packaging, low-voltage operation, and 18 I/O positions is especially useful when the PCB needs several inputs and outputs without moving to a larger package.
Designers should follow the pin-description and decoupling guidance in the manufacturer datasheet, preserve clear programming access to UPDI, and validate timing at the intended operating voltage. When firmware or peripheral requirements approach the memory limit, check code size and SRAM allocation before committing the PCB, because 8 KB of Flash is modest for feature-heavy connected products.
This page consolidates the official device characteristics, package information, searchable documentation topics, parameter comparisons, and practical design guidance. It also distinguishes true same-package alternatives from devices that merely share the broad 8-bit MCU category, helping engineers make a package-aware replacement decision.
Bộ thay thế dễ dàng lắp đặt cho ATTINY816-SF — 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 ATTINY816-SF (cùng hình factor và footprint) — khác nhau ở Operating Temperature Range, Package.
ATTINY816-SN
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATTINY416-SF
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
ATTINY1616-SF
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
ATTINY1614-SF
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
ATTINY1617-SF
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
ATTINY816-SF Tỷ lệ tối đa & tính chất điện
| Product Type | 8-bit AVR Flash Microcontroller |
| Tần số xung maksimum | 20 MHz |
| Program Memory Size | 8 KB Flash |
| Data RAM Size | 512 bytes |
| EEPROM Size | 128 bytes |
| CPU Architecture | AVR with hardware multiplier |
| Bề rộng đường dữ liệu | 8 bits |
| Number of I/O | 18 I/O |
| ADC Resolution | 10 bits |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Khoảng nhiệt độ hoạt động | -40 C to +125 C |
| Hộp | 20-pin SOIC |
| Kiểu lắp đặt | SMD |
| Low-Power Technology | picoPower |
| Peripheral Architecture | Core Independent Peripherals and Event System |
| Programming Interface | UPDI |
| Green Classification | Green |
Cấu hình chân ATTINY816-SF
| Chân 1 | PA0 — Port A input/output 0 |
| Chân 2 | PA1 — Port A input/output 1 |
| Chân 3 | PA2 — Port A input/output 2 |
| Chân 4 | PA3 — Port A input/output 3 |
| Chân 5 | PA4 — Port A input/output 4 |
| Chân 6 | PA5 — Port A input/output 5 |
| Chân 7 | PA6 — Port A input/output 6 |
| Chân 8 | PA7 — Port A input/output 7 |
| Chân 9 | PB0 — Port B input/output 0 |
| Chân 10 | PB1 — Port B input/output 1 |
| Chân 11 | PB2 — Port B input/output 2 |
| Chân 12 | PB3 — Port B input/output 3 |
| Chân 13 | PB4 — Port B input/output 4 |
| Chân 14 | PB5 — Port B input/output 5 |
| Chân 15 | PB6 — Port B input/output 6 |
| Chân 16 | PB7 — Port B input/output 7 |
| Chân 17 | VCC — Power supply input |
| Chân 18 | GND — Ground |
| Chân 19 | RESET — Reset input |
| Chân 20 | UPDI — Unified programming and debug interface |
Ứng dụng tiêu biểu
ATTINY816-SF phù hợp cho 6 Áp dụngs: Industrial Sensor and Control Module, Low-Power IoT Sensor Node, Building Automation Controller, Appliance and HVAC Control, LED Lighting and Dimming Control, Compact Instrumentation and Data Logger.
Industrial Sensor and Control Module
The ATTINY816-SF fits compact industrial modules that combine a 10-bit ADC with multiple digital control signals. Its 20 MHz AVR core provides short execution times for filtering, threshold evaluation, and actuator updates, while 18 I/O positions reduce the need for an I/O expander. The 1.8 V to 5.5 V operating range supports both low-voltage sensors and conventional industrial signal levels. Its -40 C to +125 C rating suits equipment expected to operate across extended ambient temperatures. The primary design trade-off is limited Flash: reserve space for diagnostics, calibration, and communication code before freezing the firmware release.
Được đề xuất
Low-Power IoT Sensor Node
The ATTINY816-SF is well suited to a compact IoT sensor node that periodically measures an analog input and wakes to service a digital peripheral. Its event-driven tinyAVR architecture and core-independent peripherals can reduce CPU activity during idle periods, while picoPower technology supports low-power operation. The 10-bit ADC is suitable for resistive sensors and simple analog front ends, and 512 bytes of SRAM provides working space for short measurement sequences. Designers should use the sleep modes and event configuration documented for the family, then verify average current and wake-up latency across the intended temperature and voltage range.
Được đề xuất
Building Automation Controller
The ATTINY816-SF can serve as a local controller for building-automation equipment such as a room module, occupancy interface, or HVAC actuator controller. Its 18 I/O positions accommodate switches, alarm outputs, and status indicators, while the 10-bit ADC supports environmental sensing or potentiometer-based configuration. At 20 MHz, the processor can service multiple timers and event-driven I/O updates without moving to a larger MCU. The main engineering consideration is firmware partitioning: keep protocol handling and diagnostics compact enough for the 8 KB Flash limit while preserving deterministic update timing.
Được đề xuất
Appliance and HVAC Control
The ATTINY816-SF is appropriate for appliance and HVAC control modules that coordinate inputs, motors, relays, and status indicators. Its hardware-multiplier AVR core executes control calculations efficiently, while 18 I/O positions provide direct connections to sensors and discrete outputs. The 1.8 V to 5.5 V range allows the controller to operate from regulated low-voltage rails, and the -40 C to +125 C specification supports demanding equipment environments. Designers should allocate pins carefully for motor-related isolation and verify that protection, snubbing, and grounding controls keep switching transients away from sensitive analog inputs.
Được đề xuất
LED Lighting and Dimming Control
The ATTINY816-SF can coordinate dimming, button handling, and status functions in a compact LED lighting controller. Its 20 MHz clock rate supports time-sensitive PWM and sequencing, and its 18 I/O positions can serve keys, indicator outputs, and control signals. The 10-bit ADC also permits analog dimming-set inputs or simple light-level feedback where required. Because LED drivers can create switching noise, keep the MCU supply filtering separate from high-current power paths and validate the logic ground strategy. Firmware must include startup, fade, and fault states without exceeding the 8 KB program-memory budget.
Được đề xuất
Compact Instrumentation and Data Logger
The ATTINY816-SF fits a compact instrument that samples slow-changing analog signals and records operating events in EEPROM. Its 10-bit ADC provides sufficient resolution for basic process measurement, while 128 bytes of EEPROM can retain calibration constants, counters, and operating history. The 512-byte SRAM supports local buffering, and the 20-pin SOIC package helps keep the PCB compact. For longer records, use an external nonvolatile memory device and keep the internal EEPROM for frequently changed parameters. Validate ADC accuracy and noise at the selected clock and reference configuration before calibrating the measurement chain.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATTINY816-SF — 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 | ATTINY816-SN | ATTINY416-SF | ATTINY1616-SF | ATTINY1614-SF | ATTINY1617-SF |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin SOIC | 20-pin SOIC - same | 20-pin SOIC - same package family | 20-pin SOIC - same package family | 20-pin SOIC - same package family | 20-pin SOIC - same package family |
| Flash Memory | 8 KB | 8 KB | 4 KB | 4 KB | 2 KB | 4 KB |
Bảo phân biệt quan trọng
- Doubled memory within the same tinyAVR 1-series family (vsATTINY416-SF)
- Exact core-memory match for direct family substitution (vsATTINY816-SN)
- Larger memory headroom for feature-rich control firmware (vsATTINY1614-SF)
Ghi chú thiết kế
Place the device-side decoupling capacitor close to the VCC and GND pins and route its return directly to the ground pin. Keep analog inputs away from switching-node traces, relay contacts, and high-current LED returns. If the PCB combines the ATTINY816-SF with a switching converter or LED driver, use a defined ground partition and join it at the appropriate power-return point rather than relying on broad copper coupling.
Do not approve a firmware build solely because it fits on a development board. The ATTINY816-SF has 8 KB of Flash and 512 bytes of SRAM, so library variants, debug code, stack depth, and event-handler buffers can consume the margin. Check the worst-case SRAM allocation at interrupt entry and retain a production map for the exact compiler and optimization settings. This prevents a working prototype from becoming an unstable production image.
Keep UPDI accessible through a programming header or test pads and follow the manufacturer's recommended UPDI interface layout. Place RESET sensing and decoupling paths away from noisy analog or switching sections. Verify programming operation after final PCB assembly, including operation under the intended supply range and during power transitions; a successful programming test on an unwired board does not validate a noisy assembled system.
Estimated: the MCU's average dissipation depends on supply voltage, active time, peripheral load, and ambient temperature, so calculate it from the final power budget rather than using the 20 MHz clock frequency alone. Confirm that the selected SOIC assembly and exposed copper meet the manufacturer layout guidance. For a 5 V system operating near 20 MHz, minimize high-duty-cycle GPIO drive to reduce simultaneous switching loss and ground bounce.
Thông tin tuân thủ
The product listing identifies the ATTINY816-SF as Green, but explicit RoHS, REACH, lead-free, halogen-free, conflict-minerals, and AEC-Q100 declarations are not included. Use the manufacturer product documentation or a request to XAIPART for current compliance documentation.