ATMEGA16HVA-4TU - 8-bit AVR MCU, 16KB Flash, 4MHz | Microchip
MPN: ATMEGA16HVA-4TU ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.47 | $34.70 |
| 100 | $3.08 | $308.00 |
| 500 | $2.75 | $1,375.00 |
| 1,000 | $2.42 | $2,420.00 |
ATMEGA16HVA-4TU Overview
A microcontroller unit (MCU) is a single-chip embedded computer that integrates a processor core, program memory, data memory, and peripherals on one die. Within the power-management hierarchy, battery-management MCUs form a specialized class between general-purpose microcontrollers and dedicated battery-management ICs, adding intelligence such as state-of-charge computation and authentication to cell monitoring.
Key features include the 16KB self-programmable FLASH, 512 bytes of data EEPROM for calibration and logging data, and a supply voltage range of 1.8V to 9.0V that spans one- and two-cell Li-ion stacks without an external regulator. The 4MHz speed grade matches the requirements of low-power monitoring loops where maximum clock speed is deliberately limited to reduce switching losses and noise coupling into precision cell measurements.
Architecturally, the device is based on the AVR enhanced RISC core, executing most instructions in a single clock cycle, which yields high code density and efficient interrupt handling for time-critical cell-voltage and current sampling routines. According to the FindIC product summary, the ATMEGA16HVA-4TU is an 8-bit battery-management microcontroller for 1-cell and 2-cell Li-ion applications that require high security and authentication, accurate monitoring, and high utilization of the cell energy.
Typical applications include single-cell and two-cell Li-ion battery packs for portable equipment, smart battery authentication and fuel-gauging subsystems, and industrial monitoring nodes powered directly from battery stacks. The wide supply range and dedicated analog peripherals reduce external component count in space-constrained pack electronics.
When designing with this part, respect the 4MHz speed-grade ceiling of this suffix and verify that your code size fits within 16KB FLASH with margin for firmware updates via self-programming. The 28-TSOP-I package is a fine-pitch surface-mount body, so specify adequate PCB land pattern tolerances.
This page synthesizes distributor availability data, drop-in family alternatives, and battery-management-specific design guidance not consolidated in the manufacturer datasheet.
Drop-in alternatives for ATMEGA16HVA-4TU — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ATMEGA16HVA-4TU (same form factor and footprint) — differing in Package, Program Memory Size, Supply Voltage Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATMEGA16HVA-4TUR
✅ Drop-In✓ In Stock
$2.64 / Unit
View Datasheet →ATMEGA16HVA-4CKU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
Contact for price
View Datasheet →ATMEGA8HVA-4TU
✅ Drop-In📋 Reference alternative (not in catalog)
ATMEGA16HVA-4TU Maximum Ratings & Electrical Characteristics
| Core Processor | AVR |
| Core Size | 8-Bit |
| Architecture | AVR RISC |
| Program Memory Size | 16KB (8K x 16) FLASH |
| Data EEPROM Size | 512 Bytes |
| Speed Grade | 4 MHz |
| Supply Voltage Range | 1.8 V to 9.0 V |
| Application Target | 1-cell and 2-cell Li-ion battery management |
| Package | 28-TSOP (TSOP-I) |
| Mounting Type | Surface Mount |
| Number of Pins | 28 |
| Product Family | AVR ATmega |
| Security Features | High security and authentication for battery packs |
ATMEGA16HVA-4TU 28-tsop (tsop-i) Pin Configuration Guide
Pin configuration for ATMEGA16HVA-4TU (28-tsop (tsop-i) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for ATMEGA16HVA-4TU.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA16HVA-4TU is suitable for 6 applications: Single-Cell Li-ion Battery Packs, Two-Cell Li-ion Stack Monitoring, Smart Battery Authentication and Security, Fuel Gauging and State-of-Charge Computation, Portable and Wearable Device Power Management, Industrial Battery-Backed Monitoring Nodes.
Single-Cell Li-ion Battery Packs
The ATMEGA16HVA-4TU was purpose-designed by Atmel/Microchip as a battery-management MCU for 1-cell Li-ion packs, per the FindIC product overview. Its 1.8V to 9.0V supply range means the device runs directly from a single cell (3.0V-4.2V) without a regulator, cutting quiescent cost and board area in compact packs for portable devices. The AVR RISC core executes most instructions in one cycle at up to the 4MHz speed grade, giving enough headroom for periodic cell-voltage sampling, current integration for fuel gauging, and protection-state decisions while keeping average current low. The 16KB FLASH hosts security and authentication stacks, and 512 bytes of EEPROM retain cycle counts and calibration data across power cycles.
Recommended
Two-Cell Li-ion Stack Monitoring
For 2-cell Li-ion series stacks (up to approximately 8.4V fully charged), the ATMEGA16HVA-4TU's 9.0V maximum supply rating provides direct-connection headroom, eliminating the level-shifting and regulator circuitry a generic 5V MCU would require. According to FindIC, the device targets applications requiring accurate monitoring and high utilization of cell energy, which maps directly to per-cell voltage measurement, balancing control, and charge/discharge current supervision in small 2S packs used in handheld instruments and backup devices. The 4MHz AVR core handles the interrupt-driven measurement scheduler deterministically, while the 28-TSOP-I package fits the thin flexible-PCB form factors typical of pack electronics. Firmware can implement cell imbalance detection and protective cutoffs within the 16KB code budget.
Recommended
Smart Battery Authentication and Security
The ATMEGA16HVA-4TU is specified for battery applications requiring high security and authentication, according to FindIC and Microchip USA product descriptions. The 16KB FLASH provides room for cryptographic challenge-response routines that let a host system verify that the attached pack is a genuine, manufacturer-approved cell stack, protecting against counterfeit batteries that pose safety risks. The 512-byte EEPROM stores per-pack unique keys, manufacturing data, and cycle counters that must survive power loss and pack removal. Because the AVR is programmable in-system, manufacturers can inject unique secrets during final pack test. The 4MHz grade is fully sufficient for authentication handshakes, which are latency-tolerant, while keeping the silicon optimized for low-power pack residency.
Recommended
Fuel Gauging and State-of-Charge Computation
Accurate state-of-charge estimation demands periodic voltage and current sampling with stable timing, which the ATMEGA16HVA-4TU delivers through its AVR timer resources and precision analog monitoring path in the 1.8V-9.0V direct-battery supply domain. Executing coulomb-counting and look-up-table correction algorithms in the single-cycle RISC core at 4MHz keeps each measurement cycle short, so the MCU spends most of its residency in low-power idle, maximizing energy utilization - exactly the high-utilization-of-cell-energy goal stated in the FindIC product overview. The 16KB FLASH accommodates temperature-compensated capacity tables, and the EEPROM preserves learned capacity values across discharge cycles, improving gauge accuracy over pack lifetime without external memory.
Recommended
Portable and Wearable Device Power Management
Portable electronics with thin form factors benefit from the ATMEGA16HVA-4TU's 28-TSOP-I package, a low-profile surface-mount body suited to 0.8mm-class fine-pitch assembly inside slim enclosures. Because the part regulates nothing and connects directly across the 1-cell Li-ion rail (1.8V-9.0V operating range), designers avoid the efficiency losses and startup complexity of an intermediate regulator between cell and supervisory MCU. The 4MHz speed grade limits switching noise that could couple into sensitive analog front ends such as audio codecs or biometric sensors sharing the battery rail. The AVR's mature Microchip Studio toolchain and in-system programming streamline firmware maintenance across product revisions in fast-moving consumer portfolios.
Recommended
Industrial Battery-Backed Monitoring Nodes
Industrial nodes that ride through mains outages on small Li-ion or LiFePO4 backup cells can use the ATMEGA16HVA-4TU as an intelligent pack supervisor: its 9.0V ceiling tolerates charged 2-cell stacks, and the AVR core logs cell voltage, temperature-derived events, and outage history into the 512-byte EEPROM. Authentication features let service equipment verify pack provenance during maintenance, an emerging requirement in managed industrial battery fleets. According to the Microchip USA description, the device combines the standard ATmega AVR architecture - familiar toolchain, wide third-party support - with battery-specific analog functions, reducing integration risk compared with pairing a generic MCU to a discrete gauge IC. The 16KB FLASH leaves headroom for custom reporting protocols.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA16HVA-4TU — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA16HVA-4TUR | ATMEGA16HVA-4CKU | ATMEGA8HVA-4TU |
|---|---|---|---|---|
| Package | 28-TSOP (TSOP-I) | 28-TSOP (TSOP-I) - same | 28-TSOP (TSOP-I) - same | 28-TSOP (TSOP-I) - same |
| Brand | Microchip Technology (Atmel) | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16KB (8K x 16) | 16KB (8K x 16) | 16KB (8K x 16) | 8KB |
| EEPROM | 512 Bytes | 512 Bytes | 512 Bytes | 512 Bytes (per family datasheet) |
| Speed Grade | 4 MHz | 4 MHz | 4 MHz class | 4 MHz |
| Supply Voltage Range | 1.8 V to 9.0 V | 1.8 V to 9.0 V | 1.8 V to 9.0 V | 1.8 V to 9.0 V (per Mouser family listing) |
| Target Application | 1/2-cell Li-ion battery management | 1/2-cell Li-ion battery management | 1/2-cell Li-ion battery management | 1/2-cell Li-ion battery management |
| Core / Architecture | 8-bit AVR RISC | 8-bit AVR RISC | 8-bit AVR RISC | 8-bit AVR RISC |
Key Differentiators
- Double the program memory for authentication and gauging firmware (vs ATMEGA8HVA-4TU)
- Guaranteed low-speed grade for minimal pack noise and power (vs ATMEGA16A-AU)
- Drop-in ordering flexibility via reel packing (vs ATMEGA16HVA-4TUR)
Design Notes
The 1.8V-9.0V supply range lets the ATMEGA16HVA-4TU sit directly across a 2-cell Li-ion stack (max ~8.4V charged), but hot-plug of a charged pack can produce transient overshoot above the nominal cell voltage. Add a small series impedance and local TVS or zener clamp near the VDD pin to absorb connection transients, and verify that charger tolerances (e.g., 4.2V/cell +2% charger accuracy) plus balancing behavior never push the stack above 9.0V during any operating mode, including open-circuit charging faults.
The -4 suffix denotes a 4MHz speed grade; code written for 8MHz or 16MHz ATmega16 derivatives will run at half or quarter speed here, breaking timing loops, UART baud rates, and I2C bit-bang timing if F_CPU is misdefined. Set F_CPU to 4000000UL in firmware and re-verify all delay_us/delay_ms based protocols after migration from any other ATmega part. This is the single most common defect when porting generic ATmega16 code onto the HVA battery-management variant.
The 28-TSOP-I is a fine-pitch (0.8mm-class) gull-wing package; specify the land pattern per the manufacturer datasheet footprint drawing rather than reusing a generic 28-SOIC or TQFP pad layout. Keep the precision cell-voltage sense traces as short as possible and guard them from the switching nodes of any pack-side load or charger FETs, since the accuracy of the monitoring function stated in the FindIC overview depends directly on clean analog routing at the sense pins.
Estimated: with 16KB FLASH, if you add a bootloader (typically 1-2KB for AVR SPM-based loaders) plus SHA-style authentication code, verify your linker map leaves margin before finalizing the architecture. If the total approaches 16KB, the pin-compatible ATMEGA16HVA-4TUR offers no more memory, so plan a firmware split or move to offloading host-side logic rather than discovering overflow at certification time.
Compliance Information
Lead-free inferred from the -TU ordering-code suffix convention for Microchip AVR parts; formal RoHS/REACH declarations not present in the provided web data and must be confirmed on the Microchip product page environmental documents.
