ATMEGA16HVA-4CKU - AVR 8-bit MCU 16KB Flash 36-LGA | Microchip
MPN: ATMEGA16HVA-4CKU β Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
ATMEGA16HVA-4CKU Overview
A microcontroller (MCU) is a single-chip computer that integrates a processor core, memory, and programmable peripherals on one die, sitting within the system hierarchy of semiconductor -> integrated circuit -> embedded processor -> microcontroller. The ATmega16HVA belongs to Microchip's AVR battery-management family, a specialized branch of the AVR ATmega line that integrates dedicated battery-management peripherals alongside the standard MCU fabric.
Key features include the Advanced RISC AVR architecture with 133 mostly single-cycle instructions, 16KB self-programmable FLASH, 256B EEPROM, 512B SRAM, and integrated battery-management functions that distinguish the HVA series from general-purpose ATmega parts of similar memory size. The 4 MHz maximum clock suits low-power embedded control where efficiency matters more than raw speed.
Technically, the ATmega16HVA differs from its sibling ATmega8HVA only in memory size and interrupt vector capacity: the 16HVA doubles the FLASH to 16KB while retaining the same peripheral set, package, and pin configuration, allowing firmware headroom growth without PCB redesign.
Typical applications include smart battery packs, battery chargers with fuel gauging, and portable embedded systems requiring supervised battery operation.
Designers should note the 4 MHz ceiling when porting code from faster ATmega parts, and verify the 36-LGA footprint (6.5 x 3.5 mm) against their land pattern early.
This page synthesizes distributor availability data, family-level cross-references, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for ATMEGA16HVA-4CKU β 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-4CKU (same form factor and footprint) β differing in Program Memory Size, Package, Series, Supply Voltage Range.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATMEGA8HVA-4CKU
β Drop-Inπ Reference alternative (not in catalog)
ATMEGA16HVA-4CKUR
β Drop-Inβ In Stock
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View Datasheet βATMEGA16HVA-4CKU Maximum Ratings & Electrical Characteristics
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 4 MHz |
| Program Memory Size | 16KB (8K x 16) FLASH |
| EEPROM Size | 256B |
| RAM Size | 512B |
| Supply Voltage | 2.5V / 3.3V / 5V |
| Package | 36-LGA (6.5 x 3.5 mm) |
| Mounting Type | Surface Mount |
| Series | AVR ATmega HVA (Battery Management) |
| Instruction Set | 133 AVR RISC instructions |
| Family Sibling | ATmega8HVA (8KB FLASH, same package) |
| Applications Focus | Battery management |
| Product Family Lifecycle | ACTIVE |
ATMEGA16HVA-4CKU 36-lga (6.5 x 3.5 mm) Pin Configuration Guide
Pin configuration for ATMEGA16HVA-4CKU (36-lga (6.5 x 3.5 mm) 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-4CKU.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA16HVA-4CKU is suitable for 6 applications: Smart Battery Pack Management, Battery Charger Control, Portable and Handheld Devices, Fuel Gauging and State-of-Charge Monitoring, Industrial Backup Power Supervision, IoT Edge Nodes with Battery Power.
Smart Battery Pack Management
The ATMEGA16HVA-4CKU fits smart battery pack management because it integrates dedicated battery-management peripherals with an AVR 8-bit RISC core, reducing external component count versus a general-purpose MCU plus separate battery-management IC. Its 4 MHz clock and 2.5V/3.3V/5V supply range allow direct operation from battery-derived rails, while 16KB FLASH and 512B SRAM accommodate fuel-gauging algorithms, state-of-charge tracking, and SMBus-style communication firmware. Placed on the battery pack PCB as the primary supervisor, it monitors cell conditions and communicates pack status to the host. The trade-off is the modest 4 MHz ceiling, which is rarely a constraint since battery-management loop rates are low.
Recommended
Battery Charger Control
In battery charger applications, the ATMEGA16HVA-4CKU serves as the charge-sequencing controller, executing charge-profile state machines within its 16KB FLASH while its HVA-family battery-management peripherals handle voltage and current supervision. The 133-instruction AVR architecture executes most instructions in a single 250 ns cycle at 4 MHz, giving deterministic timing for charge-phase transitions. Supplying the MCU from a 2.5V, 3.3V, or 5V rail simplifies power-tree design across charger topologies. Designers should budget FLASH carefully: charge algorithms plus communication stacks consume the 16KB quickly, and the ATmega8HVA sibling with 8KB will not suffice for feature-rich chargers.
Recommended
Portable and Handheld Devices
Portable and handheld devices benefit from the ATMEGA16HVA-4CKU's compact 36-LGA (6.5 x 3.5 mm) footprint, which conserves board area in dense portable layouts, and from its low-voltage operation at 2.5V and 3.3V rails typical of single-cell battery systems. The 4 MHz AVR core delivers adequate performance for UI scanning, sensor polling, and power-supervision tasks while keeping dynamic power low. Its 16KB FLASH hosts application plus battery-supervision firmware in one device. The principal trade-off is the narrow LGA package, which requires a precise 6.5 x 3.5 mm land pattern and cannot be hand-soldered easily, favoring reflow assembly in volume production.
Recommended
Fuel Gauging and State-of-Charge Monitoring
For fuel gauging, the ATMEGA16HVA-4CKU's HVA-family battery-management peripherals offload measurement tasks from the CPU, while the 512B SRAM holds coulomb-counter accumulation state and calibration tables. The 256B EEPROM retains learned battery capacity parameters across power cycles, which is essential for adaptive fuel-gauging accuracy over the pack lifetime. Running at 4 MHz from a 2.5V rail minimizes the MCU's own energy draw, preserving measurement fidelity. Firmware must be written to fit 16KB FLASH including float or fixed-point gauging math; if the algorithm outgrows memory, the pin-compatible move is constrained because no larger-memory HVA variant exists in this package.
Recommended
Industrial Backup Power Supervision
Industrial systems with backup battery subsystems use the ATMEGA16HVA-4CKU to supervise battery health, execute charge maintenance, and report status over serial links. Its ACTIVE lifecycle status and the Rochester Electronics second channel noted on distributor listings provide continuity for long-lifecycle industrial products, though designers should confirm long-term supply with Microchip given the family's narrow breadth. The 5V supply option interfaces directly with legacy industrial 5V logic, while 3.3V operation suits modern mixed-signal boards. Because the 4 MHz clock limits computational headroom, keep supervision algorithms simple and reserve complex analytics for the host controller on the main board.
Recommended
IoT Edge Nodes with Battery Power
Battery-powered IoT edge nodes can use the ATMEGA16HVA-4CKU as a combined application controller and battery supervisor, consolidating two roles that typically require separate ICs. The integrated battery-management peripherals handle pack monitoring while the AVR core runs sensor-reading and radio-wakeup scheduling from 16KB FLASH. Operation at 2.5V matches single-cell chemistry directly, and the small 6.5 x 3.5 mm LGA suits miniaturized nodes. The engineering constraint is the 4 MHz clock: choose radio modules with hardware protocol stacks so the MCU only manages higher-level logic, and verify that the niche HVA family remains available for your product's full market lifetime before standardizing.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA16HVA-4CKU β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA8HVA-4CKU | ATMEGA16HVA-4CKUR |
|---|---|---|---|
| Package | 36-LGA (6.5 x 3.5 mm) | 36-LGA (6.5 x 3.5 mm) - same | 36-LGA (6.5 x 3.5 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Speed | AVR 8-bit, 4 MHz | AVR 8-bit, 4 MHz | AVR 8-bit, 4 MHz |
| FLASH | 16KB (8K x 16) | 8KB (-50%) | 16KB (8K x 16) |
| EEPROM | 256B | 256B | 256B |
| SRAM | 512B | 512B | 512B |
| Supply Voltage | 2.5V / 3.3V / 5V | 2.5V / 3.3V / 5V | 2.5V / 3.3V / 5V |
| Packing Format | Tray | Tray | Tape & Reel |
Key Differentiators
- Doubled program memory within the HVA family (vs ATMEGA8HVA-4CKU)
- Integrated battery-management peripherals (vs ATMEGA16A-AU)
- Honest trade-off: modest 4 MHz clock ceiling (vs ATMEGA16HVA-4CKUR)
Design Notes
The most frequent porting mistake is assuming the ATmega16HVA runs at ATmega16-class clock speeds. The HVA battery-management family is specified at a 4 MHz maximum, dramatically below general-purpose ATmega parts. Code ported from a 16-20 MHz ATmega16 will run at one-quarter to one-fifth speed; re-verify all timing loops, UART baud rates, and PWM frequencies. Per the manufacturer datasheet, the ATmega16HVA and ATmega8HVA differ only in memory size and interrupt vector count - confirm your interrupt table matches the 16HVA configuration when reusing ATmega8HVA example code.
The 36-LGA (6.5 x 3.5 mm) package uses a fine-pitch bottom-terminated land pattern that must follow the exact dimensions in the manufacturer datasheet mechanical drawing - do not extrapolate from other LGA footprints. Define non-solder-mask-defined (NSMD) pads where the datasheet permits, and route battery-sense traces as Kelvin connections directly at the pads to preserve measurement accuracy for the battery-management peripherals. Because this is a niche package, request the land-pattern file from Microchip support rather than third-party footprint libraries, which frequently contain errors for HVA parts.
Operate the device at 2.5V or 3.3V when powered from battery-derived rails to minimize MCU consumption, reserving 5V operation for boards with legacy 5V logic. Decouple each supply pin with 100 nF ceramics placed within 2 mm of the pin per standard AVR practice in the manufacturer datasheet. Since this is a battery-management MCU, budget quiescent contribution carefully: the MCU runs continuously in gauging applications, so its average current belongs in the pack's self-discharge budget. Verify exact sleep-mode currents in the official datasheet before finalizing battery-life calculations, as this page does not reproduce those figures.
Compliance Information
Compliance status was not stated in the provided verified web data; confirm RoHS/REACH status on the official Microchip product page before procurement.
