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ATMEGA8HVA-4TU
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Product Detailed Parameters
- Description：IC MCU 8BIT 8KB FLASH 28TSOP
- Series：AVR® ATmega
- Mfr：Microchip Technology
- Package：Tray
- Core Processor：AVR
- Core Size：8-Bit
- Speed：4MHz
- Connectivity：SPI
- Peripherals：Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O：7
- Program Memory Size：8KB (4K x 16)
- Program Memory Type：FLASH
- EEPROM Size：256 x 8
- RAM Size：512 x 8
- Voltage - Supply (Vcc/Vdd)：1.8V ~ 9V
- Data Converters：A/D 5x12b
- Oscillator Type：Internal
- Operating Temperature：-20°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Supplier Device Package：28-TSOP
- Package / Case：28-TSSOP (0.465", 11.80mm Width)
- Grade：-
- Qualification：-
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Overview
The ATMEGA8HVA-4TU is an 8-bit AVR microcontroller designed for smart battery applications, featuring 8KB of In-System Programmable Flash, 256 bytes of EEPROM, and 512 bytes of SRAM. It operates within a voltage range of 1.8V to 9V with a maximum withstand voltage of 28V on high-voltage pins. The device supports speeds up to 4MHz and includes specialized peripherals such as a 12-bit ADC, a high-resolution Coulomb Counter ADC, and autonomous battery protection circuitry.
Feature Summary
- Integrated autonomous battery protection module for monitoring and safeguarding one or two series-connected Li-ion cells.
- High-resolution Coulomb Counter ADC enables precise accumulated current measurements and instantaneous current detection.
- Combines step-up and linear voltage regulators to ensure operation at supply voltages as low as 1.8V.
- Includes Deep Under-voltage Recovery mode to support pre-charging of deeply discharged battery cells.
Applications
- Smart battery packs requiring secure authentication and accurate monitoring
- Lithium-ion battery management systems with over-current and short-circuit protection
- Portable electronic devices utilizing single or dual-cell battery configurations
Procurement Notes
Verify the specific speed grade suffix '4' corresponds to the 4MHz operational limit during procurement. Confirm package availability matches the required form factor, as datasheet references include LGA and TSOP options while the model suffix implies a specific variant. Ensure design compliance with the specified operating temperature range and voltage tolerances before finalizing orders.
Selection Notes
Select this component for applications prioritizing integrated battery protection and fuel gauging capabilities. The device is suitable where space constraints favor a monolithic solution combining MCU, regulator, and protection logic. Consider the 8KB Flash capacity against application code requirements and verify compatibility with existing development tools like debugWIRE for debugging needs.
Part Context
This microcontroller belongs to the AVR Smart Battery family, specifically engineered for Lithium-ion cell management. It integrates the AVR RISC core with dedicated hardware for battery safety, distinguishing it from general-purpose AVR MCUs by including high-voltage tolerant I/O and specialized analog front-end features for coulomb counting.
Replacement Considerations
ATmega16HVA variants offer increased Flash memory but share similar peripheral sets. General-purpose ATmega8 models lack the integrated battery protection and high-voltage interfaces required for direct replacement in smart battery designs without significant schematic modifications.
