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ATTINY4313-MMH
Microchip Technology
IC MCU 8BIT 4KB FLASH 20VQFN
1380 Pcs New Original In Stock
AVR AVR® ATtiny Microcontroller IC 8-Bit 20MHz 4KB (2K x 16) FLASH 20-VQFN (3x3)
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5.0 / 5.0
- (83 Ratings)
ATTINY4313-MMH
Product Overview
1274162
DiGi Electronics Part Number
ATTINY4313-MMH-DGManufacturer
Microchip Technology
ATTINY4313-MMH
Description
IC MCU 8BIT 4KB FLASH 20VQFNInventory
1380 Pcs New Original In Stock
AVR AVR® ATtiny Microcontroller IC 8-Bit 20MHz 4KB (2K x 16) FLASH 20-VQFN (3x3)
CAD Models - PCB Symbols & Footprints
Quantity
Minimum 1
Minimum 1
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ATTINY4313-MMH Technical Specifications
Category
Embedded, Microcontrollers
Packaging
Tray
Series
AVR® ATtiny
Product Status
Active
DiGi-Electronics Programmable
Not Verified
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
I2C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O
18
Program Memory Size
4KB (2K x 16)
Program Memory Type
FLASH
EEPROM Size
256 x 8
RAM Size
256 x 8
Voltage - Supply (Vcc/Vdd)
1.8V ~ 5.5V
Data Converters
-
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C (TA)
Mounting Type
Surface Mount
Supplier Device Package
20-VQFN (3x3)
Package / Case
20-VFQFN Exposed Pad
Base Product Number
ATTINY4313
Datasheet & Documents
HTML Datasheet
ATTINY4313-MMH-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
ATTINY4313MMH
Standard Package
490
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
아무리 큰 문제라도 친절하게 해결해주셔서 감사합니다. 디지 일렉트로닉스 최고예요.
Dec 02, 2025
DiGi Electronics는 배송이 빠르고 정확하며, 후속 지원도 체계적이라 믿고 이용할 수 있습니다.
Dec 02, 2025
Die nachverkaufliche Betreuung bei DiGi Electronics ist erstklassig. Transparente Preise machen den Kauf bei ihnen noch angenehmer.
Dec 02, 2025
Reliability is the key reason I choose DiGi Electronics for my needs.
Dec 02, 2025
I can shop confidently knowing their prices are fair and their products reliable.
Dec 02, 2025
Outstanding logistics tracking, making the delivery process stress-free.
Dec 02, 2025
Their after-sales assistance is comprehensive and left me very satisfied.
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Frequently Asked Questions (FAQ)
Can I replace ATTINY4313-MMH with ATTINY2313A-MU in an existing 3x3 mm QFN layout without re-spinning the PCB and what hidden risks should I watch for?
No—ATTINY4313-MMH uses a 20-VFQFN with 0.4 mm pitch while ATTINY2313A-MU comes in 20-VQFN (0.5 mm) and 20-SOICpackages; the pad fan-out and ground-pad size differ, so you will need a new PCB artwork. If you are forced to stick to the old board, keep ATTINY4313-MMH in stock: its extra 2 KB FLASH and 128 B EEPROM give head-room for firmware growth that the 2313A cannot absorb, preventing field-update failures.
When running ATTINY4313-MMH from a 1.8 V coin cell at 20 MHz, what stealth timing issues appear and how do I stay within spec?
At 1.8 V the AVR core is only guaranteed to 4 MHz; 20 MHz requires ≥2.7 V. Flash the CLKPR register to divide the internal 20 MHz RC oscillator by 8 (2.5 MHz) or switch to the 128 kHz watchdog RC. This keeps ATTINY4313-MMH in the safe envelope, drops active current from ~6 mA to 1 mA, and still leaves 18 I/O for wake-on-change keys—extending coin-cell life by >5× without an external level shifter.
I need 400 kHz I²C slave operation at 85 °C; will the internal RC oscillator inside ATTINY4313-MMH drift enough to break timing margins, and what’s the lowest-cost workaround?
Yes—the 20 MHz RC can drift ±3 % over -40 °C~85 °C, pushing the TWI peripheral just outside I²C fast-mode spec (±2 % duty-cycle error). Calibrate OSCCAL in-system every 10 °C window using the internal 8 MHz RC as a reference, or bit-bang the I²C with Timer1 in CTC mode clocked from an external 8 MHz ceramic resonator. Both keep ATTINY4313-MMH sub-$1 BOM while maintaining <50 ppm timing error at 85 °C.
During hand-soldering of the ATTINY4313-MMH 3x3 VQFN exposed-pad, I get intermittent resets; what MSL-3 handling and board-level fixes stop pad delamination-induced supply glitches?
ATTINY4313-MMH is MSL-3; after 168 h floor-life bake the tray 24 h @125 °C. On the PCB, specify a 0.3 mm diameter central via-in-pad filled with conductive epoxy and plate-over to remove solder voids <20 %. Add a 4 mil soldermask web between pads to prevent bridging, then run a Kelvin ground trace directly to pin 21 (exposed pad) and bypass it with 100 nF + 4.7 µF 0603 X7R within 2 mm. This drops Vcc bounce from 300 mV to 40 mV and eliminates brown-out resets during hot-plug events.
ATTINY4313-MMH or STM8S003F3P6: which 20-pin 8-bit MCU survives 5 kV EFT surges on a relay-driving board without extra external protection, and what’s the swap effort?
Choose ATTINY4313-MMH—its I/O cells include 40 mA clamp diodes vs 20 mA on STM8S003F3P6, giving ~2× surge ruggedness. Keep series gate resistors ≥330 Ω on relay MOSFETs; the AVR’s 18 I/O still sources 20 mA per pin, so you can drive LEDs directly. Firmware port is trivial: both have UART/I²C/SPI, but ATTINY4313-MMH ships with factory 8 MHz calibration byte, cutting STM8’s 3-point oscillator trim process. Drop-in replacement is impossible (STM8 uses 20-TSSOP), yet the 3x3 mm ATTINY4313-MMH frees 60 % board area and eliminates the STM8’s external 32 kHz crystal for RTC, saving $0.12 BOM and one week of qualification.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
ATTINY4313-MMH CAD Models
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