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ATTINY461-20SUR
Microchip Technology
IC MCU 8BIT 4KB FLASH 20SOIC
18036 Pcs New Original In Stock
AVR AVR® ATtiny Microcontroller IC 8-Bit 20MHz 4KB (2K x 16) FLASH 20-SOIC
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(Ships tomorrow)
*Quantity
Minimum 1
Minimum 1
5.0 / 5.0
- (305 Ratings)
ATTINY461-20SUR
Product Overview
1264816
DiGi Electronics Part Number
ATTINY461-20SUR-DGManufacturer
Microchip Technology
ATTINY461-20SUR
Description
IC MCU 8BIT 4KB FLASH 20SOICInventory
18036 Pcs New Original In Stock
AVR AVR® ATtiny Microcontroller IC 8-Bit 20MHz 4KB (2K x 16) FLASH 20-SOIC
Quantity
Minimum 1
Minimum 1
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ATTINY461-20SUR Technical Specifications
Category
Embedded, Microcontrollers
Packaging
Cut Tape (CT) & Digi-Reel®
Series
AVR® ATtiny
Product Status
Active
DiGi-Electronics Programmable
Verified
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
USI
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O
16
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)
2.7V ~ 5.5V
Data Converters
A/D 11x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C (TA)
Mounting Type
Surface Mount
Supplier Device Package
20-SOIC
Package / Case
20-SOIC (0.295", 7.50mm Width)
Base Product Number
ATTINY461
Datasheet & Documents
HTML Datasheet
ATTINY461-20SUR-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
2 (1 Year)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.31.0001
Additional Information
Other Names
ATTINY461-20SURDKR
ATTINY461-20SURCT
ATTINY461-20SUR-DG
ATTINY46120SUR
ATTINY461-20SURTR
Standard Package
1,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
I am very satisfied with how quickly my order was shipped and how eco-friendly the packaging was.
Dec 02, 2025
DiGi Electronics ensures rapid fulfillment, which helps us stay competitive.
Dec 02, 2025
The reliable delivery times combined with top-quality products make every transaction satisfactory.
Dec 02, 2025
The checkout process was seamless and straightforward, which made shopping stress-free.
Dec 02, 2025
Affordable prices and dedicated customer care make DiGi Electronics stand out.
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Frequently Asked Questions (FAQ)
What are the primary design risks when migrating from a legacy ATTINY461 to the ATTINY461-20SUR in a 5V system that experiences significant voltage transients?
When migrating to the ATTINY461-20SUR, particularly in a 5V system prone to voltage transients, the primary risk centers around its specified operating voltage range of 2.7V to 5.5V. While the ATTINY461-20SUR is robust, extreme positive transients exceeding 5.5V can lead to latch-up or permanent damage. Mitigation strategies include implementing robust input voltage clamping circuitry (e.g., using Zener diodes or transient voltage suppressors) on all power supply lines connected to the ATTINY461-20SUR, and carefully verifying the power supply filtering to ensure it can handle the expected transient energy without exceeding the absolute maximum ratings of the ATTINY461-20SUR.
How can I effectively replace a discontinued ATTINY461A-PU (DIP package) with the ATTINY461-20SUR (SOIC package) in an existing PCB designed for through-hole components, considering signal integrity and assembly challenges?
Replacing a discontinued ATTINY461A-PU with the ATTINY461-20SUR requires careful planning. The main challenges are the package change (DIP to SOIC) and potential PCB layout modifications. To maintain signal integrity, ensure the new surface mount footprint for the ATTINY461-20SUR is properly routed, minimizing trace lengths and avoiding unnecessary vias. Consider using a small adapter board if direct PCB modification is not feasible. For assembly, ensure your manufacturing process can handle fine-pitch SOIC components. A risk assessment of potential solder bridging and rework procedures for the ATTINY461-20SUR is also recommended.
Under what specific application conditions might the 20MHz clock speed of the ATTINY461-20SUR become a bottleneck, and what alternative microcontrollers should I consider if I anticipate exceeding this limit?
The 20MHz clock speed of the ATTINY461-20SUR can become a bottleneck in applications requiring high-speed data acquisition from the 11x10-bit ADCs, rapid PWM signal generation with high resolution, or complex interrupt-driven routines that consume significant processing time. If your application demands faster execution, consider microcontrollers with higher clock speeds like the Microchip PIC16F17xxx series or other AVR devices with internal oscillators at 32MHz or higher, as these will offer more processing headroom for the ATTINY461-20SUR.
What are the potential long-term reliability concerns when operating the ATTINY461-20SUR at the upper end of its -40°C to 85°C temperature range, and how can I mitigate them?
Operating the ATTINY461-20SUR at the upper limit of its 85°C ambient temperature range can accelerate wear-out mechanisms, particularly for the FLASH memory and internal oscillator. To mitigate this, ensure adequate thermal management through PCB design (e.g., ground planes for heat dissipation) and consider airflow if the product is enclosed. Over-specifying the operating temperature slightly by designing for a maximum ambient of 70°C can significantly extend the operational lifespan of the ATTINY461-20SUR. Also, monitor the voltage regulator's performance at elevated temperatures, as its stability is critical for the ATTINY461-20SUR.
If I'm integrating the ATTINY461-20SUR into a battery-powered device with strict power consumption requirements, what are the key trade-offs between using its internal oscillator versus an external crystal, and what are the power saving implications for the ATTINY461-20SUR?
When integrating the ATTINY461-20SUR into a power-sensitive, battery-powered application, using its internal oscillator is generally more power-efficient than an external crystal. The internal oscillator for the ATTINY461-20SUR consumes less current and doesn't require additional external components, simplifying the design and reducing PCB space. However, external crystals offer higher frequency stability and accuracy, which might be crucial for precise timing applications like communication protocols. If power is paramount, and the application tolerates slight timing variations, the internal oscillator of the ATTINY461-20SUR is the preferred choice. Leverage the ATTINY461-20SUR's various sleep modes to further minimize power consumption.
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.
ATTINY461-20SUR CAD Models
Microchip Technology ATTINY461-20SUR PCB symbols & footprints
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