ATTINY412-SSFR - 8-bit AVR tinyAVR 1 MCU, 4KB Flash, SOIC-8 | Microchip
MPN: ATTINY412-SSFR ✓ Hoạt độngATTINY412-SSFR Tóm tắt
An 8-bit AVR microcontroller is aRISC-architecture CPU that executes one instruction per clock cycle, enabling deterministic real-time response with very low active power. The tinyAVR 1-series sits insideMicrochip's 8-bit AVR portfolio below the megaAVR and XMega families, optimized for cost- and power-constrained embedded designs that need on-chip analog and event-driven peripherals.Positioned as a drop-in successor to legacy ATtiny25/45/85 partson SOIC-8 footprints, the ATtiny412 adds modern peripherals (Event System, configurable custom logic) while preserving the AVR toolchain (GCC, Atmel Studio / Microchip Studio, MPLAB X).
Key differentiating specifications include 4 KB self-programmable Flash, 256 B SRAM, 128 B EEPROM, six ADC channels with 10-bit resolution, a single-channel 8-bit DAC, two 16-bit Timer/Counter Type B instances plus one 12-bit Timer/Counter Type D, and the Peripheral Touch Controller (PTC) supporting touch buttons via the slider/wheel QTouch library. A 10-pin UPDI programming/debug interface replaces the legacy ISP header, and the device operates from 1.8 V to 5.5 V with picoPower sleep modes down to sub-microamp current.
The architecture combines the deterministic AVR 8-bit pipeline with a hardware multiplierfor faster integer math, plus the Event System that lets peripherals trigger each other without CPU intervention - critical for SleepWalking low-power designs. The integrated 8-bit DAC and 10-bit ADC remove the need for external analog components in closed-loop and sensor-interface designs.
Typical applications include capacitive-touch button interfaces, IoT sensor nodes, low-power wearables, LED lighting controllers, and small appliance user-interface boards where its SOIC-8 footprint, on-chip analog, and picoPower modes are decisive advantages. The Functional Safety (FuSa) variant is suited to designs targeting IEC 60730 class B appliance-safety requirements.
When designing with the ATTINY412-SSFR, route the UPDI programming pin to a dedicated test pad or 1x3 header for in-system programming; the SOIC-8 does not expose the legacy 6-pin ISP interface. Decouple VDD with a 100 nF X7R ceramic placed within2 mm of the supply pin, and leave PB0/PB1 free for the default UPDI/XTAL functions unless re-mapped via the fuse settings.
This page synthesizesdistributor pricing, same-brand and cross-brand drop-in alternatives, andpractical design notes thatcomplementthemanufacturer datasheet (DS40001911B).
Bộ thay thế dễ dàng lắp đặt cho ATTINY412-SSFR — 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 ATTINY412-SSFR (cùng hình factor và footprint) — khác nhau ở ADC, Core, EEPROM, Operating Temperature, Package.
ATTINY412-SSF
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATTINY212-SSN
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATTINY1624-SSU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATTINY412-SSFR Tỷ lệ tối đa & tính chất điện
| Core | 8-bit AVR RISC with hardware multiplier |
| Series | tinyAVR 1-series (Functional Safety, FuSa) |
| Flash Memory | 4 KB |
| SRAM | 256 B |
| EEPROM | 128 B |
| Max CPU Speed | 20 MHz |
| Operating Voltage (VDD) | 1.8 V to 5.5 V |
| ADC | 10-bit, 6 channels |
| DAC | 8-bit, 1 channel |
| Timers | 2 x 16-bit + 1 x 12-bit |
| PTC (Touch Controller) | Peripheral Touch Controller supporting QTouch library |
| Custom Logic | Configurable (LUT-based) |
| Programming Interface | UPDI (10-pin) |
| Hộp | SOIC-8 |
| Nhiệt độ hoạt động | -40C to +125C |
| Trạng thái RoHS | Compliant |
| Kiểu lắp đặt | Surface Mount |
Cấu hình chân ATTINY412-SSFR
| Chân 1 | VDD — Supply voltage (1.8 V to 5.5 V) |
| Chân 2 | PB3 — Digital I/O / ADC input / peripheral function |
| Chân 3 | PB2 — Digital I/O / UPDI programming / debug data line |
| Chân 4 | PB1 — Digital I/O / peripheral function |
| Chân 5 | PB0 — Digital I/O / peripheral function / CLKI |
| Chân 6 | PA3 — Digital I/O / ADC input / peripheral function |
| Chân 7 | PA2 — Digital I/O / ADC input / default RESET / TDI |
| Chân 8 | GND — Ground |
Ứng dụng tiêu biểu
ATTINY412-SSFR phù hợp cho 6 Áp dụngs: Capacitive-Touch User Interface, Battery-Powered IoT Sensor Node, Home Appliance Control Board (Class B / Functional Safety), LED Lighting Controller, Low-Cost Wearable / Fitness Sensor, Industrial Sensor Module / 4-20 mA Loop Transmitter.
Capacitive-Touch User Interface
The ATTINY412-SSFR integratesthe Peripheral Touch Controller (PTC) supporting self- and mutual-capacitance electrodes withMicrochip QTouch library support.A typical 4- to 6-button touch keypad draws under 1 mA active and sub-microamp in SleepWalking touch wake - making the part ideal for white-good and lighting control panels.According to the Microchip ATtiny212/412 datasheet family, the PTC coupled with the Event System wakes the CPU only on a validated touch, eliminating polling.Recommended companion: AT42QT2120 (touch IC), ATTINY1626 (touch MCU upgrade), and 100 nF X7R decoupling.
Được đề xuất
Battery-Powered IoT Sensor Node
The ATTINY412-SSFR's picoPower SleepWalking mode drops active current below 1 uA while the Event System / ADC autonomously wakes the CPU only when a measured threshold crosses - ideal for coin-cell and 2xAAA sensor nodes reporting every few seconds. The 1.8 V to 5.5 V VDD range supports single-cell Li-Ion / alkaline chemistries directly, while the 6 ADC inputs interface with thermistor, photodiode, and gas-sensor analog front-ends.According toMicrochip ATtiny212/412 datasheet family DS40001911B, retention current is well under 1 uA in Power-Down with RTC running. Companion: a sub-GHz or BLE module, MCP1643 boost for single-cell, and a low-quiescent LDO.
Được đề xuất
Home Appliance Control Board (Class B / Functional Safety)
As a Functional Safety (FuSa) variant ofthe tinyAVR 1-series, the ATTINY412-SSFR is suitable for IEC 60730 Class B appliance-safety designs requiring watchdog, brown-out, and clock-monitoring firmware support.The 16 MIPS CPU throughput executes closed-loop motor / heater control loops while the 6-channel 10-bit ADC reads NTC thermistors and current-sense amplifierswith 10-bit resolution - sufficient for over-temperature and over-current detection. The 8-bit DAC drives setpoint outputs for analog-controlled stages.According to the Microchip datasheet family, the FuSa documentation package includes FMEDA and diagnostic-library reference code. Companion: an isolated gate-driver IC for AC-line switching and an ADC-front-end op-amp.
Được đề xuất
LED Lighting Controller
The ATTINY412-SSFR is well-suited to constant-current LED driver boards where the 8-bit DAC controls the analog setpoint of a current-regulator stage and the 16-bit Timer/Counter Type B instances generate high-resolution PWM dimming curves.The 4 KB Flash stores mood-lighting profiles and the 128-byte EEPROM preserves user settings across power cycles.According to theMicrochip ATtiny212/412 datasheet family DS40001911B, the Event System allows the 16-bit PWM to update on a hardware event - useful for cross-fade animations without jitter. The wide 1.8 V - 5.5 V VDD range supports both 3.3 V and 5 V LED-driver rails. Companion: a high-current constant-current LED driver, MOSFETs, and a temperature sensor for thermal foldback.
Được đề xuất
Low-Cost Wearable / Fitness Sensor
With picoPower active current below 1 mA andsub-microamp sleepcurrent, the ATTINY412-SSFR extends coin-cell life in wearables like heart-rate straps, fitness bands, and BLE beacon tags. The 6-channel 10-bit ADC reads PPG / pulse-oximeter photodiode signals, while the I2C / SPI master interfaces connect to low-energy sensor ICs and a host BLE SoC. The 20 MHz CPU provides sufficient throughput to filter sensor data without offloading.According toMicrochipATtiny212/412 datasheet family DS40001911B, SleepWalking mode allows the ADC to autonomously monitor signals and wake the CPU onlywhen a threshold is crossed, preserving battery. Companion: a low-Iq LDO, an analog front-end, and an external BLE / ANT module.
Được đề xuất
Industrial Sensor Module / 4-20 mA Loop Transmitter
The ATTINY412-SSFR's industrial -40C to +125C temperature range and 4 KB Flash make it a fit for industrial sensor-conditioning modules.The 6-channel 10-bit ADC reads bridge / RTD / pressure / load-cell signals, the 8-bit DAC generates the 4-20 mA loop setpoint via an external op-amp + transistor driver, and the Event System handles fault detection without CPU load. According to the Microchip datasheetfamily, the brown-out detector and watchdog timer support industrial reliability expectations. Companion: an instrumentation amplifier, a 4-20 mA loop driver, and an isolated DC-DC for loop-powered designs.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATTINY412-SSFR — 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 | ATTINY412-SSF | ATTINY212-SSN | ATTINY1624-SSU |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SOIC-8 | SOIC-8 - same | SOIC-8 - same | SOIC-8 (extendedSOIC) - verify land pattern |
| Core | 8-bit AVRRISC @ 20 MHz | 8-bit AVR RISC @ 20 MHz | 8-bit AVR RISC @ 20 MHz | 8-bit AVR RISC @ 20 MHz |
| Operating Voltage | 1.8 V - 5.5 V | 1.8 V - 5.5 V | 1.8 V - 5.5 V | 1.8 V - 5.5 V |
Bảo phân biệt quan trọng
- Functional Safety (FuSa) tinyAVR 1-seriesdevice in SOIC-8 (vsATTINY212-SSN)
- PTC touch controller + Event System on-chip (vsLegacy ATtiny25/45/85 in SOIC-8)
- picoPower SleepWalking with autonomous ADC monitoring (vsLarger pin-count tinyAVR / megaAVR MCUs)
Ghi chú thiết kế
The ATTINY412-SSFR uses the UPDI one-wire programming interfaceon pin 3 (PB2), not the legacy 6-pin AVR ISP.For prototype bring-up, route PB2 to a dedicated 1x3 or 2x3 through-hole header with VDD and GND - you cannot reuse the old ATtiny25/45/85 ISP footprint. If the firmware disables the UPDI pin function via fuses, a high-voltage UPDI programmer is required to recover the part.
Decouple VDD (pin 1) with a 100 nF X7R ceramic placed within 2 mm of the supply pin and a 10 uF bulk capacitor on the rail.In SleepWalking designs, the Event System / ADC should handle threshold detection autonomously to keep CPU wake duration and active Energy measurable.According to the Microchip ATtiny212/412 datasheet family, retention current in Power-Down with RTC is well below 1 uA when peripherals are properly disabled.
Route the UPDI / PB2 trace toa dedicated test pad or 1x3 header that can be probed during firmware development. Keep PB2 away from switching signals / oscillators; on-board noise on UPDI reduces programming reliability. Use a small-series resistor (e.g. 100 ohm) inline with UPDI if the trace length exceeds ~50 mm or runs near a high-current switching node. The PA2 / RESET pin (pin 7) can be reconfigured as GPIO only after disabling its reset function via fuse - leave the bootloader dark.
Thông tin tuân thủ
RoHS and lead-free per Microchip product page. The -SSFR ordering code is the Functional Safety (FuSa) variant suitablefor IEC 60730 Class B appliance-safety designs but is not AEC-Q100 qualified.
