ATMEGA64HVE2-PLPW - 8-Bit 15MHz 64KB Flash MCU | Microchip
MPN: ATMEGA64HVE2-PLPW ✓ Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
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ATMEGA64HVE2-PLPW Overview
An 8-bit AVR microcontroller is a Reduced Instruction Set Computing (RISC) processor in the broader hierarchy of embedded processing: core -> MCU -> system-on-chip for embedded control. AVR ATmega devices combine the CPU, program memory, data memory, and peripherals on a single die, making them voltage regulators of computation for automotive and industrial control tasks where a full application processor is unnecessary.
Key features of this device include the 64KB self-programmable FLASH, generous for battery-management state machines and charge-control firmware; the 4KB SRAM that supports measurement buffering and CAN-free communication stacks; and the ATmega AVR RISC architecture delivering most instructions in a single clock cycle at 15 MHz. Per the FindIC listing of the manufacturer datasheet, the part is rated for the 9V/12V/15V/18V/24V automotive supply range, which distinguishes the HVE2 family from standard 5V ATmega parts.
The ATMEGA64HVE2 belongs to Microchip's AVR HVE2 battery-management family, purpose-built for automotive lead-acid and standby battery monitoring. The wide-voltage tolerant I/O and supply architecture allow direct connection to battery-fed rails, reducing external conditioning circuitry. The exposed-pad VQFN package improves thermal dissipation and provides a low-inductance ground reference for accurate analog measurements.
Typical applications include automotive lead-acid battery management units, standby battery monitoring in telematics units, and 12V/24V industrial control nodes. The Mouser product listing explicitly categorizes the part under battery management for standard lead-acid batteries.
When designing with the ATMEGA64HVE2-PLPW, pay attention to the wide supply range: decoupling and transient suppression must be sized for automotive load-dump conditions, and the exposed pad must be soldered to a solid ground plane for thermal and EMC performance.
This page synthesizes distributor listings, datasheet-derived specifications, drop-in alternatives, and practical design notes not consolidated in the manufacturer datasheet alone.
Drop-in alternatives for ATMEGA64HVE2-PLPW — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATMEGA64HVE2-PLPR
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
ATMEGA32HVE2-PLPW
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$3.65 / Unit
View Datasheet →ATMEGA64HVE2-PLPW Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit AVR RISC |
| Core Series | AVR ATmega |
| Maximum Clock Frequency | 15 MHz |
| Program Memory Size | 64KB (64K x 8) FLASH |
| SRAM Size | 4KB |
| EEPROM Size | 1KB |
| Supply Voltage Range | 9V / 12V / 15V / 18V / 24V (automotive wide-range) |
| Package | 48-VQFN (7x7 mm) with Exposed Pad |
| Pin Count | 48 |
| Mounting Type | Surface Mount |
| Application Segment | Automotive, Lead-Acid Battery Management |
ATMEGA64HVE2-PLPW 48-vqfn (7x7 mm) with exposed pad Pin Configuration Guide
Pin configuration for ATMEGA64HVE2-PLPW (48-vqfn (7x7 mm) with exposed pad 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 ATMEGA64HVE2-PLPW.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA64HVE2-PLPW is suitable for 6 applications: Automotive Lead-Acid Battery Management, Standby Battery Monitoring in Telematics, 24V Industrial Control Nodes, Automotive Sensor Acquisition Modules, DC Power Supply Supervision, Heavy Equipment and Off-Highway Electronics.
Automotive Lead-Acid Battery Management
The ATMEGA64HVE2-PLPW was purpose-built by Microchip for automotive lead-acid battery management, as confirmed by Mouser's product categorization ('Stand. Lead Acid Btty Management'). Its wide 9V-24V supply tolerance allows direct connection to 12V and 24V vehicle battery rails without a pre-regulator, while the 64KB FLASH accommodates state-of-charge algorithms, charge/discharge state machines, and fault logging firmware. The 1KB EEPROM retains calibration data and historical battery state across power cycles. In a typical battery-management unit, the MCU supervises voltage and current measurement circuits, drives charge-control FETs via PWM, and reports status over the vehicle network. The exposed-pad 48-VQFN package provides the low-inductance ground and thermal dissipation needed for accurate analog measurement on a noisy automotive board.
Recommended
Standby Battery Monitoring in Telematics
Telematics and tracking units rely on standby lead-acid batteries that must be monitored for health and readiness. The ATMEGA64HVE2-PLPW fits this role because its automotive-rated 9V-24V input range covers both 12V float-charge and 24V dual-battery truck systems directly, and its 15 MHz AVR RISC core executes most instructions in a single cycle - enough headroom for periodic voltage/current sampling, coulomb-counting arithmetic, and communication handling within a tight power budget. The 64KB FLASH supports over-the-air-updateable monitoring firmware with ample margin, while the 4KB SRAM buffers measurement histories. In this application the MCU typically wakes on a timer or battery event, performs a measurement burst through its ADC, evaluates state-of-charge and state-of-health, and returns to low-power idle, extending standby battery life.
Recommended
24V Industrial Control Nodes
Industrial equipment commonly runs 24V control panels, and most general-purpose microcontrollers require a local 5V or 3.3V regulator. The ATMEGA64HVE2-PLPW eliminates that stage: per the FindIC datasheet summary it is rated for 9V/12V/15V/18V/24V operation, so it can be powered from the 24V rail directly, reducing BOM count, board area, and a common failure point. The 64KB FLASH and 4KB SRAM support sequencer logic, sensor polling, and operator-interface code, while the 48-VQFN (7x7 mm) exposed-pad package keeps the controller compact on dense I/O boards. Industrial designers should still add TVS protection and RC filtering ahead of the supply pin for surge robustness, and solder the exposed pad to a ground plane for EMC performance in motor-drive environments.
Recommended
Automotive Sensor Acquisition Modules
Automotive sensor modules - battery current sense, temperature arrays, voltage dividers on high-side rails - benefit from the ATMEGA64HVE2-PLPW's combination of wide-voltage operation and AVR analog capability. Because the HVE2 family tolerates automotive rail conditions natively, the MCU can sit close to the sensors it reads, shortening analog runs and improving measurement fidelity. The 15 MHz core performs oversampling and digital filtering on ADC data; the 1KB EEPROM stores per-unit calibration coefficients written at end-of-line test. The 48-VQFN exposed pad anchors the analog ground, minimizing ground bounce between the measurement and digital sections. Firmware stored in the 64KB FLASH can include per-sensor linearization tables and diagnostic routines, making the module self-contained and serviceable in the field.
Recommended
DC Power Supply Supervision
DC distribution and supply systems in vehicles and industrial cabinets need continuous supervision of rail voltage, load current, and fuse state. The ATMEGA64HVE2-PLPW operates across the 9V-24V span that covers common DC buses, per the FindIC datasheet data, so it monitors supplies without level-shifting circuitry on its own supply. The AVR core's deterministic single-cycle instruction execution simplifies watchdog and fault-response timing analysis, important in supervision logic. The 64KB FLASH holds fault tables, logging routines, and communication stacks, and the 4KB SRAM retains rolling event buffers during brown-out events long enough to persist them to EEPROM. Board designers should implement brown-out detection and validate the reset threshold against the monitored rail's sag profile during cranking or motor-start transients.
Recommended
Heavy Equipment and Off-Highway Electronics
Off-highway and heavy-equipment platforms use 12V or 24V battery systems with severe cranking transients - exactly the environment the ATMEGA64HVE2-PLPW's automotive HVE2 family targets. The device's wide supply rating keeps the controller alive through the 9V-18V excursions typical of cranking on 12V systems and up to 24V nominal on truck platforms. The 15 MHz AVR core handles machine-state sequencing, indicator drive, and simple operator feedback. The 48-VQFN (7x7 mm) exposed-pad package survives vibration-bonded assembly and, with the pad soldered to the ground plane, provides mechanical robustness plus EMC benefit in an environment full of alternator ripple and inductive switching noise. Use transient suppression on all board-level inputs entering from wiring harnesses.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA64HVE2-PLPW — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA64HVE2-PLPR | ATMEGA32HVE2-PLPW |
|---|---|---|---|
| Package | 48-VQFN (7x7 mm) EP | 48-VQFN (7x7 mm) EP - same | 48-VQFN (7x7 mm) EP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Clock | AVR ATmega 8-bit, 15 MHz | AVR ATmega 8-bit, 15 MHz | AVR ATmega 8-bit, 15 MHz |
| FLASH Program Memory | 64KB | 64KB | 32KB (-50%) |
| Supply Voltage Rating | 9V/12V/15V/18V/24V automotive | 9V/12V/15V/18V/24V automotive - same | 9V/12V/15V/18V/24V automotive - same |
| Target Application | Lead-acid battery management, automotive | Lead-acid battery management, automotive | Lead-acid battery management, automotive |
Key Differentiators
- Wide 9V-24V automotive supply range (vs ATMEGA64A-MUR)
- Largest FLASH in the HVE2 family (vs ATMEGA32HVE2-PLPW)
- Purpose-built battery-management targeting (vs ATMEGA32HVE2-PLPW)
Design Notes
The ATMEGA64HVE2-PLPW uses a 48-VQFN (7x7 mm) package with an exposed pad that must be soldered to a solid ground plane. The exposed pad is the primary ground connection and thermal path; an unsoldered or voided pad causes unreliable ground reference and degraded analog accuracy. Use an array of thermal vias (typically 4x4 or larger) under the pad to tie it to internal ground planes. Verify stencil apertures per standard QFN land-pattern guidance to avoid solder bridging on the 0.5 mm pitch leads.
The device is rated for 9V/12V/15V/18V/24V automotive systems per the datasheet summary, so supply decoupling must be designed for automotive transients, not benign 5V rails. Place a 100 nF ceramic capacitor within 2 mm of each supply pin pair plus bulk capacitance (10 uF class) at the board entry. Add TVS protection for load-dump and a series element (ferrite or resistor) with RC filtering if the rail experiences cranking sag. Validate brown-out detector settings against the minimum cranking voltage of the target vehicle platform.
Do not substitute standard 5V ATmega parts (e.g., ATmega64A) for the HVE2 without redesign: standard parts lack the wide 9V-24V automotive supply rating and require an added regulator stage. When using the ATMEGA32HVE2 pin-compatible option, recompile and confirm firmware fits within 32KB FLASH with margin for updates. QFN pin-1 orientation errors are common - verify the dot marker against the datasheet pinout before fab, since a rotated QFN is not recoverable after reflow.
Compliance Information
The part is positioned as automotive by distributor and FindIC datasheet data; exact AEC-Q100 grade and environmental compliance statuses are not stated in the retrieved data and must be confirmed on the Microchip product page.
