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ATTINY28V-1MU
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Product Detailed Parameters
- Description：IC MCU 8BIT 2KB FLASH 32VQFN
- Series：AVR® ATtiny
- Mfr：Atmel
- Package：Bulk
- Core Processor：AVR
- Core Size：8-Bit
- Speed：1.2MHz
- Connectivity：-
- Peripherals：POR, WDT
- Number of I/O：11
- Program Memory Size：2KB (1K x 16)
- Program Memory Type：FLASH
- EEPROM Size：-
- RAM Size：-
- 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：32-VQFN (5x5)
- Package / Case：32-VFQFN Exposed Pad
- Grade：-
- Qualification：-
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Overview
The ATTINY28V-1MU is an obsolete 8-bit AVR microcontroller from Microchip Technology, formerly Atmel. It features a 2 kB Flash program memory and operates within a voltage range of 1.8 V to 5.5 V. The device supports a maximum clock frequency of 1.2 MHz and includes 11 general-purpose I/O lines. It is housed in a 28-pin MLF-32 surface-mount package. The component is rated for industrial temperature ranges from -40°C to +85°C.
Feature Summary
- Integrates 2 kB non-volatile Flash memory with system-in-programmable capabilities.
- Supports low-voltage operation down to 1.8 V for energy-efficient applications.
- Provides 11 programmable digital input/output pins for peripheral control.
Applications
- Low-power embedded control systems
- Industrial sensor interfaces
- Battery-operated consumer electronics
Procurement Notes
This component is officially discontinued and no longer in production. Verification of availability should focus on surplus or secondary market sources rather than direct manufacturer distribution. Ensure that any acquired units are genuine Microchip products by checking markings and documentation, as obsolescence increases the risk of counterfeit replacements.
Selection Notes
Designers requiring active alternatives should consider current ATtiny series devices with similar pin counts and memory sizes. Verify that replacement parts support the required 1.8 V minimum operating voltage and offer compatible packaging such as MLF or QFN. Review updated datasheets for changes in peripheral configurations and instruction set compatibility before migration.
Part Context
The ATTINY28V-1MU belongs to the ATtinyAVR family, which utilizes an enhanced RISC architecture optimized for code density and power efficiency. This specific variant represents an older generation of 8-bit microcontrollers designed for cost-sensitive applications. Its discontinuation reflects Microchip's transition toward newer device families with expanded feature sets and improved performance metrics.
Replacement Considerations
No public confirmed substitute part numbers are available for this obsolete component. Engineers must evaluate modern ATtiny equivalents based on functional requirements and pin compatibility.
