ATTINY412-SSF - 8-bit AVR tinyAVR 1 MCU, 4KB Flash, 8-SOIC | Microchip
料号： ATTINY412-SSF ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.62 | $0.62 |
| 10 | $0.58 | $5.80 |
| 100 | $0.49 | $49.00 |
| 500 | $0.42 | $210.00 |
| 1,000 | $0.36 | $360.00 |
ATTINY412-SSF 概述
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), non-volatile storage (EEPROM), and configurable peripherals such as timers, ADC, and communication controllers on one die. tinyAVR 1-series devices occupy the entry-level position in Microchip's 8-bit AVR hierarchy: tinyAVR -> megaAVR -> AVR -> Microchip 8-bit MCU family. They are optimized for cost-sensitive, low-pin-count, low-power embedded designs that need deterministic behavior and Core Independent Peripherals (CIPs).
The ATTINY412 differentiates itself from older tinyAVR generations by using the latest 8-bit AVR core with a hardware multiplier (single-cycle), 6-event System, 4-channel 10-bit ADC with up to 12-bit resolution via oversampling, and Configurable Custom Logic (CCL) LUTs. These features enable the MCU to handle sensor conditioning, signal routing, and glue logic autonomously, offloading the CPU. Functional Safety (FuSa) variants add documentation packages for IEC 61508 SIL 2/3 systems.
Architecturally, the device uses a Harvard-style 8-bit RISC core with a 2-stage pipeline, executes most instructions in one cycle, and integrates a bandgap reference, brown-out detector, and 20 MHz internal oscillator. The picoPower technology minimizes active and sleep currents. Peripherals are mapped via the event system, enabling deterministic inter-peripheral signalling without CPU intervention.
Typical applications include IoT sensor nodes, LED lighting controllers, capacitive touch interfaces, low-end BLDC motor commutation, battery-powered wearables, and industrial sensor conditioning. The wide 2.7V-5.5V supply range allows direct operation from a single Li-ion cell or a 5V rail.
When designing with this part, reserve one pin for UPDI programming (shared with a GPIO), budget board space for a decoupling capacitor on VDD and a 0.1uF on AVDD if analog is used, and validate toolchain compatibility with Microchip Studio or MPLAB X IDE.
This page synthesizes distributor pricing, drop-in alternatives from the same tinyAVR 1-series, and practical application context not contained in the manufacturer datasheet.
直接替换替代料： ATTINY412-SSF ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ATTINY412-SSF （相同外形与封装尺寸） ——差异在于 ADC, Operating Temperature, Package, EEPROM, Core.
快速对比工具——选择替代料号进行并排对比：
ATTINY412-SSN
✅ 直接替换📋 参考替代料（不在目录中）
ATTINY412-SSFR
✅ 直接替换✓ 有现货
$0.62 / 个
查看数据手册 →ATTINY402-SSN
✅ 直接替换📋 参考替代料（不在目录中）
ATTINY202-SSN
✅ 直接替换📋 参考替代料（不在目录中）
ATTINY212-SSN
✅ 直接替换✓ 有现货
$0.41 / 个
查看数据手册 →ATTINY412-SSF 最大额定值与电气特性
| Series | tinyAVR 1-series |
| Core | 8-bit AVR RISC |
| 最大时钟频率 | 20 MHz |
| Flash Memory | 4 KB (4K x 8) |
| SRAM | 256 bytes |
| EEPROM | 128 bytes |
| Supply Voltage (VDD) | 2.7 V to 5.5 V |
| 工作温度 | -40C to +125C (Industrial) |
| I/O Pins | 6 |
| ADC | 10-bit, up to 12-bit via oversampling |
| ADC Input Channels | 6 (differential pairs supported) |
| 封装 | 8-SOIC (3.90 mm body width) |
| 安装类型 | Surface Mount |
| Programming Interface | UPDI (single-wire on a shared GPIO) |
| Peripherals | Event System, SleepWalking, Configurable Custom Logic (CCL), PWM |
| Hardware Multiplier | Yes (single-cycle) |
| Functional Safety | FuSa variants available (IEC 61508 SIL capable) |
| RoHS 状态 | Compliant |
ATTINY412-SSF 引脚配置
| 引脚 1 | VDD — Power supply (2.7 V to 5.5 V) |
| 引脚 2 | PA6 — GPIO / analog input |
| 引脚 3 | PA7 — GPIO / analog input |
| 引脚 4 | PA3 / UPDI — GPIO / UPDI programming data line |
| 引脚 5 | GND — Ground |
| 引脚 6 | PA1 — GPIO / analog input / peripheral I/O |
| 引脚 7 | PA2 — GPIO / analog input / peripheral I/O |
| 引脚 8 | PA0 — GPIO / analog input / peripheral I/O |
典型应用
ATTINY412-SSF 适用于 6 应用s: IoT Sensor Node Firmware, LED Lighting Controllers, Capacitive Touch Interfaces, Low-End BLDC Motor Commutation, Battery-Powered Wearable Devices, Industrial Sensor Conditioning.
IoT Sensor Node Firmware
The ATTINY412-SSF is well matched to IoT sensor nodes that aggregate periodic measurements and transmit over a low-rate link. Its 4 KB Flash fits sensor conditioning code, a small protocol stack (e.g., a Modbus slave or LIN responder), and 256 bytes SRAM handles short buffers for I2C/SPI sensor reads. The picoPower SleepWalking feature allows the ADC and Event System to wake the CPU only on threshold crossings, dropping average current below 1 uA. Operating from 2.7 V to 5.5 V lets the same firmware run on a single CR2032, a Li-ion battery, or a regulated 5 V rail.
推荐
LED Lighting Controllers
The ATTINY412-SSF suits small LED drivers that need PWM, analog dimming, and DMX or 0-10 V control. Its Event System can drive PWM outputs from a timer without CPU intervention, freeing the 20 MHz AVR core for protocol parsing. The 10-bit ADC (up to 12-bit via oversampling) reads potentiometer or 0-10 V dimming signals accurately. Configurable Custom Logic (CCL) gates PWM with safety interlocks using zero CPU cycles, simplifying hardware lockout for thermally-constrained fixtures.
推荐
Capacitive Touch Interfaces
The ATTINY412-SSF supports capacitive touch buttons, sliders, and proximity sensors through its peripheral touch system (PTC) and CCL. The 6 GPIO pins can be allocated as touch channels, with the hardware-managed PTC providing hardware debouncing and noise immunity. Low-power sleep modes let a battery-powered touch remote wake only on touch, while the Event System triggers CPU execution on touch event, enabling years of standby on small cells.
推荐
Low-End BLDC Motor Commutation
The ATTINY412-SSF can commutate small BLDC or stepper motors using the Event System, CCL, and PWM peripherals. Six 10-bit ADC channels read back-EMF or current-sense amplifiers, while hardware PWM outputs drive the gate drivers. Running at 20 MHz, the AVR core can refresh commutation logic at 32 kHz, more than enough for sensorless trapezoidal commutation on small fans and pumps.
推荐
Battery-Powered Wearable Devices
The ATTINY412-SSF fits wearables where every microamp counts: heart-rate sensor aggregation, BLE companion processors, or haptic feedback controllers. With the CPU off and the Event System routing sensor-ready interrupts to wake logic, total sleep current is below 1 uA at 3 V, enabling months of standby on a CR2032. The 4 KB Flash supports state-machine firmware, while 128 bytes of non-volatile storage holds user preferences and calibration across battery swaps.
推荐
Industrial Sensor Conditioning
The ATTINY412-SSF operates over the full industrial -40C to +125C range with on-chip 10-bit ADC and analog comparator, ideal for factory-floor sensor conditioning, 4-20 mA loop transmitters, and protocol bridges. Its IEC 61508 Functional Safety (FuSa) variants add documentation packages for SIL 2/3 systems, supporting safety-rated sensor modules. The 2.7 V to 5.5 V supply range accommodates 24 V industrial rails stepped down to 5 V or 3.3 V, while the 8-SOIC package handles reflow soldering on industrial process lines.
推荐
推荐产品汇总
工程参考数据： ATTINY412-SSF ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ATTINY412-SSN | ATTINY412-SSFR | ATTINY402-SSN | ATTINY202-SSN | ATTINY212-SSN |
|---|---|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 4 KB | 4 KB | 4 KB | 2 KB | 2 KB | 2 KB |
| SRAM | 256 bytes | 256 bytes | 256 bytes | 128 bytes | 128 bytes | 128 bytes |
| EEPROM | 128 bytes | 128 bytes | 128 bytes | 64 bytes | 64 bytes | 64 bytes |
| Maximum Clock | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Temperature Grade | Industrial (-40C to +125C) | Consumer (0C to 70C) | Industrial (-40C to +125C) | Consumer (0C to 70C) | Consumer (0C to 70C) | Consumer (0C to 70C) |
| Unit Price (1 pc, approx.) | $0.62 | lower (consumer grade) | $0.62 (same die, reel) | lower (smaller Flash) | lowest (smallest variant) | low (2 KB Flash) |
关键差异点
- Industrial temperature grade in 8-SOIC package （对比 ATTINY412-SSN)
- 4 KB Flash with 256 bytes SRAM （对比 ATTINY402-SSN)
- Functional Safety (FuSa) variant availability （对比 ATTINY202-SSN)
设计说明
Place a 100 nF decoupling capacitor as close as possible to pin 1 (VDD) and pin 5 (GND). If the analog peripherals (ADC, AC) are used, add a 100 nF plus a 10 uF bulk capacitor on AVDD; the chip shares AVDD with VDD on most tinyAVR 1-series pinouts, so decouple at the IC pin, not at the regulator. Keep analog traces short and away from PWM/UART switching traces to avoid coupled noise.
Pin 4 (PA3/UPDI) is the programming pin and is shared with a GPIO. If PA3 is used as a high-impedance input only, the UPDI pull-down requirement during reset is satisfied; if PA3 is used to switch a low-impedance load, the UPDI programming will be impaired. A common workaround is to add a 4.7 kOhm series resistor on PA3 to allow in-system programming even when the pin drives an LED or relay.
Power-Down mode on the tinyAVR 1-series consumes sub-microamp current, but the watchdog timer and RTC must be configured carefully to balance wakeup frequency against quiescent current. For battery-powered sensor nodes, disable unused peripherals in the PRR (Power Reduction) register, switch all unused GPIOs to input with pull-up disabled, and configure sleep mode in the SLEEPCTRL register before the SEV instruction.
The 8-SOIC package has a 1.27 mm pitch and 3.90 mm body width. Reserve a copper pad under the exposed pad if migrating to an 8-SOIC-EP variant. For UPDI programming reliability, keep the UPDI trace shorter than 50 mm and avoid routing it near high-current switching lines. Per Microchip application notes, a 100 nF capacitor on VDD within 5 mm of the package is mandatory for clean ADC readings.
合规信息
RoHS compliant per Microchip product page and LCSC listing. Functional Safety (FuSa) variants available with IEC 61508 documentation; not AEC-Q100 qualified - use specific AEC-Q100 automotive parts (e.g., PIC16 or ATSAM automotive variants) for automotive safety.
