ATMEGA8HVA-4CKUR - 8-bit AVR MCU 8KB Flash 36-LGA | Microchip
MPN： ATMEGA8HVA-4CKUR ✗ 停產ATMEGA8HVA-4CKUR 概覽
An 8-bit microcontroller (MCU) is an integrated circuit that combines a processor core, program memory, data memory, and peripherals on a single chip, forming the lowest tier of the embedded-system hierarchy (MCU -> embedded processor -> semiconductor). The AVR architecture uses a Harvard-structure, single-cycle RISC core, executing most instructions in one clock cycle, which gives high code efficiency for battery-powered and cost-sensitive control tasks.
Key features of the ATMEGA8HVA-4CKUR include the AVR 8-bit RISC core at up to 4 MHz, 8KB self-programmable Flash, 512B of EEPROM for calibration data retention, 1KB of internal SRAM, and SPI plus LIN-relevant serial connectivity. The HVA variant integrates features aimed at automotive high-voltage environments, distinguishing it from generic ATmega8 commercial parts.
Architecturally, the device belongs to the ATmega series with single-cycle I/O access, interrupt-driven peripheral operation, and in-system programmable Flash that permits firmware update after board assembly. Peripherals typical of the family include timers, 10-bit ADC stages, and serial interfaces; exact peripheral counts should be confirmed against the manufacturer datasheet.
Typical applications include automotive LIN-bus nodes, battery-management and sensor-supervision modules, body-electronics control points, and industrial monitoring nodes where low supply-voltage flexibility (2.5V/3.3V/5V) and small LGA footprint matter.
A key design consideration: this part is classified as obsolete, so new designs should not start on it; existing designs should plan migration to an active AVR part and verify footprint compatibility before layout reuse.
This page synthesizes distributor listings, cross-reference comparisons, and lifecycle data not found in the manufacturer datasheet.
直接替換替代品，適用於 ATMEGA8HVA-4CKUR — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ATMEGA8HVA-4CKUR （相同外形與佔位） — 差異在於 Series, Connectivity, EEPROM Size, Package, Program Memory Size.
ATMEGA16HVA-4CKUR
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA8HVA-4CKU
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA8HVA-4CKUR 最大額定值與電氣特性
| Core Processor | AVR |
| Core Size | 8-Bit |
| Max Clock Speed | 4 MHz |
| Flash Memory | 8 KB |
| EEPROM | 512 B |
| SRAM | 1 KB |
| 供應電壓 | 2.5 V / 3.3 V / 5 V |
| Connectivity | SPI, LIN |
| 封裝 | 36-LGA |
| 安裝類型 | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Product Status | Obsolete (EOL) |
| Series | AVR ATmega (HVA automotive) |
| Programming | In-System Programmable (ISP) Flash |
ATMEGA8HVA-4CKUR 36-lga 腳位配置指南
ATMEGA8HVA-4CKUR（36-lga 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： ATMEGA8HVA-4CKUR.
請參閱 資料表 以查看完整腳位配置。
典型應用
ATMEGA8HVA-4CKUR 適用於 6 應用s: Automotive LIN Bus Nodes, Battery Management and Power Supervision, Body Electronics Control Modules, Sensor Acquisition and Monitoring Nodes, Industrial Control and Actuator Drivers, Legacy Board Repair and Sustaining Production.
Automotive LIN Bus Nodes
The ATMEGA8HVA-4CKUR fits LIN-bus slave node designs because the ATmega HVA family was developed for automotive subnetworks where a low-cost UART-based LIN interface handles window lifters, seat controls, mirrors, and wiper modules. The 2.5V/3.3V/5V supply range lets it sit on board-net rails with simple regulation, and the 4 MHz clock is sufficient for the 19.2 kbps LIN 2.0 data rate with generous CPU headroom. In a typical node the MCU reads switch or sensor states through the ADC, executes protocol handling in the 8KB Flash, and drives the LIN transceiver via SPI/UART pins. Because the part is obsolete, new LIN nodes should instead use active AVR parts, but existing modules can be repaired using ATMEGA16HVA-4CKUR drop-ins.
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Battery Management and Power Supervision
HVA (High-Voltage AVR) devices target battery-connected supervision circuits in vehicles, where the MCU monitors cell or rail voltage and reports status over LIN or SPI. The ATMEGA8HVA-4CKUR's flexible 2.5V-5V operation supports direct battery-rail derivatives with regulation, while 512B of EEPROM retains calibration and fault-history data across power cycles - essential for battery-log functions. The 1KB SRAM accommodates measurement buffering and averaging algorithms, and the single-cycle AVR core executes them efficiently at 4 MHz. In a typical implementation the device samples voltages through the internal ADC, compares against EEPROM-stored thresholds, and wakes or faults-out loads. Designers should verify the exact integrated high-voltage feature set in the datasheet, as family members differ in regulator and protection provisions.
推薦
Body Electronics Control Modules
Body-control subfunctions such as lighting drivers, door modules, and relay control benefit from the ATMEGA8HVA-4CKUR's combination of small 36-LGA footprint, low supply flexibility, and robust AVR interrupt architecture. The 8KB ISP Flash is large enough for the state machines and LIN communication stacks these modules require, while in-system programmability permits firmware updates at end-of-line or during service. The AVR core's deterministic single-cycle execution simplifies timing analysis for PWM light-dimming and relay sequencing tasks. Since the HVA family carries automotive-grade heritage, the part was commonly specified in tier-one body modules. With the part now obsolete, boards in this domain should be migrated: the ATMEGA16HVA-4CKUR preserves the footprint, while ATMEGA1608-class devices provide an active long-term path with a redesign.
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Sensor Acquisition and Monitoring Nodes
Distributed sensor nodes - temperature, pressure, and position sensing in vehicles and industrial equipment - suit the ATMEGA8HVA-4CKUR's ADC-based inputs and SPI connectivity to external converters. The 4 MHz clock is adequate for periodic sampling, digital filtering, and threshold reporting at LIN or UART data rates, while the 1KB SRAM buffers windowed samples for averaging. The 512B EEPROM stores per-unit calibration coefficients written during production, enabling node interchange without recompiling firmware. Operating from 2.5V allows direct connection to low-voltage sensor bridges, reducing level-shifting components. Engineers maintaining these nodes should confirm the ADC channel count and reference options in the HVA family datasheet, and consider the ATMEGA16HVA-4CKUR when firmware growth exceeds the 8KB Flash budget.
推薦
Industrial Control and Actuator Drivers
Small actuator controllers - valve drivers, fan speed controllers, and motor-assist circuits - leverage the ATMEGA8HVA-4CKUR's timer outputs for PWM generation and its robust AVR interrupt system for fault handling. Running at 5V provides noise margin in industrial cabinets, and the 36-LGA package keeps board area small in dense control cards. The 8KB Flash accommodates control loops, communication, and diagnostics simultaneously; typical code sizes for such applications fall well within budget. In-system programming supports field firmware updates through the SPI header without desoldering. Designers should add watchdog supervision and brown-out configuration because industrial supply dips are common; the HVA family includes brown-out detection that should be enabled in fuses. For long-term sourcing, plan migration to active ATmega parts.
推薦
Legacy Board Repair and Sustaining Production
The most practical current use of the ATMEGA8HVA-4CKUR is sustaining production or repair of legacy automotive and industrial boards designed between 2008 and the part's discontinuation. In this scenario, the ATMEGA16HVA-4CKUR serves as the first-line drop-in because it shares the 36-LGA footprint and upward-compatible 16KB Flash, and the ATMEGA8HVA-4CKU covers tray-based rework flows. Repair workflows should reprogram Flash and EEPROM (calibration data) after replacement, verify fuse settings including brown-out and clock configuration, and validate LIN timing against the module specification. Because broker-supplied obsolete parts carry counterfeit risk, purchase only from distributors providing date-code and provenance documentation, and consider a last-time-buy buffer of the 16KB variant.
推薦
推薦產品摘要
工程參考資料，適用於 ATMEGA8HVA-4CKUR — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ATMEGA16HVA-4CKUR | ATMEGA8HVA-4CKU | ATMEGA8A-MN | ATMEGA1608-AUR |
|---|---|---|---|---|---|
| Package | 36-LGA | 36-LGA - same | 36-LGA - same | VQFN/MLF - different | TQFP - different |
| Brand | Microchip Technology (Atmel) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 8 KB | 16 KB | 8 KB | 8 KB | 16 KB |
| Max Clock Speed | 4 MHz | 4 MHz class | 4 MHz | 16 MHz | 20 MHz |
| Supply Voltage | 2.5 V / 3.3 V / 5 V | HVA family supply range | 2.5 V / 3.3 V / 5 V | 2.7 V to 5.5 V | 1.8 V to 5.5 V |
| Lifecycle Status | Obsolete | Aging HVA family - verify | Obsolete | Active | Active |
| Drop-in Compatible | - | Yes (pin-to-pin) | Yes (pin-to-pin) | No (PCB redesign) | No (PCB redesign) |
| Connectivity | SPI, LIN | SPI, LIN | SPI, LIN | SPI, I2C, UART/USART | SPI, I2C, USART |
主要差異化特點
- Automotive HVA heritage in a compact 36-LGA (對比ATMEGA8A-MN)
- Only half the Flash of its pin-compatible sibling (對比ATMEGA16HVA-4CKUR)
- Flexible 2.5V/3.3V/5V supply range (對比ATMEGA1608-AUR)
設計說明
The ATMEGA8HVA-4CKUR is officially obsolete, so procurement risk is the primary design hazard. Authorized-distributor stock is largely depleted and remaining supply flows through broker channels with elevated counterfeit risk. For any new PCB, treat this part as unavailable; for legacy boards, qualify the ATMEGA16HVA-4CKUR (same 36-LGA footprint, 16KB Flash) and place a last-time-buy. Always request date codes, certificates of conformance, and provenance documentation when sourcing from Ampheo, integrated-circuit.com, or Lisleapex.
The device supports 2.5V, 3.3V, and 5V operation, which gives flexibility on mixed-rail boards but also creates brown-out margin concerns: at 2.5V operation the margin to the minimum operating voltage is small, so enable the AVR brown-out detector via fuses and set the threshold appropriate to the chosen rail. When replacing an ATMEGA8HVA-4CKUR with the ATMEGA16HVA-4CKUR, power consumption is nearly identical, but verify EEPROM contents and fuse bits are reprogrammed after the swap since fuses do not transfer with the physical part.
The 36-LGA package uses lands rather than protruding leads, so solder-joint inspection is limited to X-ray or electrical test. When reworking an existing board, use a profile matched to the original land pattern and avoid excessive temperature that could damage neighboring passives. LGA devices are sensitive to PCB warpage - ensure the land pattern follows the manufacturer datasheet land recommendations, and confirm clock-source and decoupling component placement match the reference layout in the HVA family datasheet to preserve LIN timing integrity.
合規資訊
Compliance status not stated in retrieved distributor data. Confirm on the Microchip product page or request certificate of conformance from the supplying distributor. The HVA family is automotive-oriented, but formal AEC-Q100 qualification status was not found in the retrieved data.
