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ATTINY804-SSFR
Microchip Technology
IC MCU 8BIT 8KB FLASH 14SOIC
1307 Pcs New Original In Stock
AVR tinyAVR™ 0, Functional Safety (FuSa) Microcontroller IC 8-Bit 16MHz 8KB (8K x 8) FLASH 14-SOIC
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5.0 / 5.0
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ATTINY804-SSFR
Product Overview
1266243
DiGi Electronics Part Number
ATTINY804-SSFR-DGManufacturer
Microchip Technology
ATTINY804-SSFR
Description
IC MCU 8BIT 8KB FLASH 14SOICInventory
1307 Pcs New Original In Stock
AVR tinyAVR™ 0, Functional Safety (FuSa) Microcontroller IC 8-Bit 16MHz 8KB (8K x 8) FLASH 14-SOIC
CAD Models - PCB Symbols & Footprints
Quantity
Minimum 1
Minimum 1
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ATTINY804-SSFR Technical Specifications
Category
Embedded, Microcontrollers
Packaging
Cut Tape (CT) & Digi-Reel®
Series
tinyAVR™ 0, Functional Safety (FuSa)
Product Status
Active
DiGi-Electronics Programmable
Not Verified
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
I2C, IrDA, LINbus, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, WDT
Number of I/O
12
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
EEPROM Size
128 x 8
RAM Size
512 x 8
Voltage - Supply (Vcc/Vdd)
2.7V ~ 5.5V
Data Converters
A/D 10x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C (TA)
Mounting Type
Surface Mount
Supplier Device Package
14-SOIC
Package / Case
14-SOIC (0.154", 3.90mm Width)
Base Product Number
ATTINY804
Datasheet & Documents
HTML Datasheet
ATTINY804-SSFR-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
3 (168 Hours)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.31.0001
Additional Information
Other Names
ATTINY804-SSFRDKR
ATTINY804-SSFRTR
ATTINY804-SSFRCT
Standard Package
3,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
грудня 02, 2025
プロフェッショナルなサポートで、初めてでも安心して購入できました。
грудня 02, 2025
DiGi Electronics' after-sales team ensures our concerns are addressed promptly.
грудня 02, 2025
Their attention to detail extends beyond product design; even their shipping process is fast and reliable.
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Frequently Asked Questions (FAQ)
What are the key reliability risks when replacing the ATTINY804-SSFR with a pin-compatible competitor like the STM8S003F3P6 in a 125°C industrial environment, and how do their functional safety certifications differ?
The ATTINY804-SSFR is explicitly designed and qualified for Functional Safety (FuSa) applications under the tinyAVR™ 0 series, with full documentation support for ISO 26262 and IEC 61508 workflows. In contrast, the STM8S003F3P6 lacks formal FuSa certification and has a maximum operating temperature of 125°C only under specific derating conditions, with less robust ESD protection (±2kV HBM vs. ±4kV on the ATTINY804-SSFR). Replacing the ATTINY804-SSFR with the STM8S003F3P6 in high-temperature or safety-critical designs introduces reliability risks due to differences in watchdog timer architecture, BOD hysteresis behavior, and long-term data retention in EEPROM—especially at sustained 125°C operation. Always validate thermal derating curves and conduct HALT testing if substitution is unavoidable.
Can the ATTINY804-SSFR safely drive inductive loads directly from its GPIO pins without additional protection circuitry, given its 12 I/Os and 16MHz internal oscillator?
No, the ATTINY804-SSFR should never drive inductive loads (e.g., relays, solenoids, or motors) directly from its GPIO pins, even though each pin can source/sink up to 20mA. The lack of integrated flyback diodes and limited transient energy absorption makes it vulnerable to voltage spikes that exceed the absolute maximum ratings (±1.0V beyond VDD/GND). Instead, use a low-side N-channel MOSFET or a dedicated driver IC (e.g., ULN2003A) with external flyback diodes. Additionally, ensure ground return paths are low-impedance to prevent latch-up, especially when operating near the 5.5V supply limit. This design practice protects the ATTINY804-SSFR’s internal ESD structures and maintains long-term reliability in noisy environments.
How does the ATTINY804-SSFR’s internal oscillator accuracy impact UART communication at 115200 baud over temperature, and what calibration steps are recommended for reliable LIN bus integration?
The ATTINY804-SSFR’s internal 16MHz RC oscillator has a factory-trimmed accuracy of ±3% at 3V and 25°C, but this degrades to ±5–7% over the full -40°C to 125°C range, which exceeds the ±2% tolerance required for reliable 115200 baud UART and LIN bus communication. To mitigate this, perform runtime oscillator calibration using the OSCCAL register based on a known reference (e.g., an external crystal or GPS PPS signal), or reduce baud rates to 57600 or lower. For LIN applications, consider using the built-in hardware LIN support with automatic synchronization, but always validate timing margins with an oscilloscope under worst-case temperature conditions. Failure to calibrate may result in framing errors or dropped packets in automotive or industrial networks.
Is it safe to reprogram the ATTINY804-SSFR’s flash memory in-system while operating from a 3.3V supply with brown-out detection (BOD) disabled, and what are the risks during field firmware updates?
Reprogramming the ATTINY804-SSFR’s flash at 3.3V with BOD disabled is highly discouraged and poses significant risks, including corrupted firmware and bricked devices. The ATTINY804-SSFR requires a stable supply above 2.7V for reliable flash writes, but voltage droops during programming—especially under load—can drop below this threshold. Without BOD, the MCU may continue executing erratic code instead of resetting cleanly. Always enable BOD at level 2.6V or 2.1V during firmware updates, and ensure the power supply can deliver peak current (>50mA) during flash write cycles. For field updates, implement a robust bootloader with checksum validation and dual-bank fallback to prevent permanent failure.
When designing a low-power sensor node with the ATTINY804-SSFR running at 32kHz from the internal oscillator, how does sleep current compare to the ATmega328P, and what peripheral configurations minimize leakage?
In power-down mode with the watchdog disabled, the ATTINY804-SSFR typically draws 100nA at 3.3V and 25°C, significantly lower than the ATmega328P’s ~500nA under similar conditions. However, to achieve this, you must disable all unused peripherals (ADC, USART, TWI), set unused GPIOs as outputs driven low or inputs with pull-ups disabled, and ensure no external components leak current into high-impedance pins. Unlike the ATmega328P, the ATTINY804-SSFR supports configurable I/O retention in sleep, but floating pins can increase leakage by several µA. Use the SLEEP_MODE_PWR_DOWN mode and validate total system current with a precision ammeter; even small parasitic paths can dominate battery life in multi-year deployments.
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ATTINY804-SSFR CAD Models
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