ATMEGA32HVB-8X3R - 8MHz 32KB Flash 8-bit AVR MCU | Microchip
部品番号: ATMEGA32HVB-8X3R ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $5.62 | $5.62 |
| 10 | $5.18 | $51.80 |
| 100 | $4.55 | $455.00 |
| 500 | $3.94 | $1,970.00 |
| 1,000 | $3.42 | $3,420.00 |
ATMEGA32HVB-8X3R 概要
A microcontroller (MCU) is an integrated circuit that combines a CPU, memory (Flash for program, SRAM for data, EEPROM for non-volatile storage), and programmable peripherals on a single silicon die. The ATmega32HVB specifically falls into the 'application-specific 8-bit MCU' sub-category of embedded microcontrollers. Its role in a battery management system (BMS) hierarchy is to perform cell voltage scanning, coulomb counting, and safety monitoring at the cell or stack level, communicating results upstream to a higher-level BMS controller.
Key features of the ATMEGA32HVB-8X3R include the high-voltage differential amplifier (supporting 4V-25V absolute maximum cell voltages per channel with appropriate scaling), 8MHz internal RC oscillator, two hardware LIN/UART-compatible USARTs, one TWI (I2C) port, one SPI port, and up to 33 programmable I/O lines. The device operates from 1.8V to 3.6V logic supply while its HV inputs tolerate the full battery stack voltage. Sleep-mode current draw is below 1 µA in power-down mode, critical for always-on battery applications.
The architecture uses Microchip's mature enhanced AVR core with single-cycle instruction execution via a two-stage pipeline, deterministic interrupt response, and Harvard bus structure. The HVB variant adds dedicated HV analog front-end blocks shared with the regular I/O pins through an internal analog multiplexer. The 32KB self-programmable Flash supports in-application updates via bootloader, enabling field firmware revisions on installed battery packs.
Typical applications include 12V-48V Li-ion BMS modules, multi-cell battery fuel-gauges, e-bike and e-scooter battery packs, cordless power-tool battery management, and high-side current shunt monitors. The HVB family is also used in uninterruptible power supply (UPS) battery monitoring and solar storage battery management.
Designers should note that this is the '8X3R' tape-and-reel variant of the ATMEGA32HVB-8X3 with -40C to +85C industrial temperature range; the closely related ATMEGA32HVB-8X3 is the same die in tube packaging. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
ドロップイン代替品: ATMEGA32HVB-8X3R — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: ATMEGA32HVB-8X3R （同一形状・フットプリント） — 相違点: Operating Temperature, Package, RoHS Status, Communication Interfaces, I/O Pins.
クイック比較ツール — 並列比較する代替部品を選択:
ATMEGA32HVB-8X3
✅ ドロップイン✓ 在庫あり
$3.1 / 個
データシートを見る →ATMEGA16HVB-8X3R
✅ ドロップイン✓ 在庫あり
$2.7 / 個
データシートを見る →ATMEGA32HVB-4X3R
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ATMEGA32HVB-8X3R 最大定格＆電気的特性
| Core Processor | AVR |
| Core Size | 8-bit |
| Maximum Clock Speed | 8 MHz |
| Program Memory (Flash) | 32 KB (16K x 16) |
| SRAM | 2 KB |
| EEPROM | 1 KB |
| Operating Voltage (Logic) | 1.8 V to 3.6 V |
| High-Voltage Battery Inputs | 4 V to 25 V |
| ADC Channels | 8 x 12-bit |
| On-chip Comparators | 2 |
| High-Voltage Differential Amplifier | Yes (built-in, cell voltage sense) |
| Communication Interfaces | I2C (TWI), SPI, 2x USART (LIN-capable) |
| I/O Pins | 33 (programmable) |
| パッケージ | 44-TSSOP (4.4 mm body width, 0.8 mm pitch) |
| 動作温度 | -40 C to +85 C (industrial) |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant (Green) |
ATMEGA32HVB-8X3R ピン構成
| ピン 1 | VCC — Logic supply voltage (1.8V-3.6V) |
| ピン 2 | HV0 — High-voltage analog input channel 0 |
| ピン 3 | HV1 — High-voltage analog input channel 1 |
| ピン 4 | HV2 — High-voltage analog input channel 2 |
| ピン 5 | HV3 — High-voltage analog input channel 3 |
| ピン 6 | HV4 — High-voltage analog input channel 4 |
| ピン 7 | HV5 — High-voltage analog input channel 5 |
| ピン 8 | HV6 — High-voltage analog input channel 6 |
| ピン 9 | HV7 — High-voltage analog input channel 7 |
| ピン 10 | GND — Logic ground |
| ピン 11 | VBAT — Battery sense high-side reference |
| ピン 12 | AREF — ADC reference voltage |
| ピン 13 | AGND — Analog ground |
| ピン 14 | AVCC — Analog supply voltage |
| ピン 15 | ADC0 — ADC input channel 0 |
| ピン 16 | ADC1 — ADC input channel 1 |
| ピン 17 | ADC2 — ADC input channel 2 |
| ピン 18 | ADC3 — ADC input channel 3 |
| ピン 19 | ADC4 — ADC input channel 4 |
| ピン 20 | ADC5 — ADC input channel 5 |
| ピン 21 | ADC6 — ADC input channel 6 |
| ピン 22 | ADC7 — ADC input channel 7 |
| ピン 23 | PA0 — GPIO port A bit 0 |
| ピン 24 | PA1 — GPIO port A bit 1 |
| ピン 25 | PA2 — GPIO port A bit 2 |
| ピン 26 | PA3 — GPIO port A bit 3 |
| ピン 27 | PA4 — GPIO port A bit 4 |
| ピン 28 | PA5 — GPIO port A bit 5 |
| ピン 29 | PA6 — GPIO port A bit 6 |
| ピン 30 | PA7 — GPIO port A bit 7 |
| ピン 31 | PB0 — GPIO port B bit 0 |
| ピン 32 | PB1 — GPIO port B bit 1 |
| ピン 33 | PB2 — GPIO port B bit 2 (SS) |
| ピン 34 | PB3 — GPIO port B bit 3 (MOSI) |
| ピン 35 | PB4 — GPIO port B bit 4 (MISO) |
| ピン 36 | PB5 — GPIO port B bit 5 (SCK) |
| ピン 37 | PB6 — GPIO port B bit 6 |
| ピン 38 | PB7 — GPIO port B bit 7 |
| ピン 39 | PC0 — GPIO port C bit 0 (SCL) |
| ピン 40 | PC1 — GPIO port C bit 1 (SDA) |
| ピン 41 | PC2 — GPIO port C bit 2 |
| ピン 42 | PC3 — GPIO port C bit 3 |
| ピン 43 | RESET — Reset input (active low) |
| ピン 44 | VCC2 — Secondary logic supply |
主な用途
ATMEGA32HVB-8X3R の用途: 6 件s: 12V-48V Multi-Cell Li-ion BMS Module, Cordless Power Tool Battery Management, E-Bike and E-Scooter Battery Pack Monitor, Solar Battery Storage / UPS Monitoring, High-Side Current Shunt Monitor, Industrial Battery Fuel Gauge Module.
12V-48V Multi-Cell Li-ion BMS Module
The ATMEGA32HVB-8X3R is purpose-built for multi-cell Li-ion battery management systems where direct cell-voltage sensing without external resistor dividers is a major BOM and PCB-area win. Its integrated 4-25V high-voltage differential amplifier and 12-bit ADC allow accurate per-cell monitoring up to 15V cells, while the 1.8-3.6V logic supply runs from a low-current LDO. The 32KB Flash supports SOC estimation algorithms, coulomb counting, and CAN/LIN firmware stacks; 2KB SRAM holds real-time pack telemetry. The 44-TSSOP footprint fits compact pack-mounted modules. Compared with discrete MCU+op-amp solutions, the HVB cuts part count by 3-5 components.
おすすめ
Cordless Power Tool Battery Management
Cordless drill, saw, and outdoor tool packs run on 5S-10S Li-ion stacks that the ATMEGA32HVB-8X3R can monitor directly through its HV analog front-end, eliminating the discrete op-amp and divider network typical of older designs. The 8MHz AVR core executes state-of-charge calculations and pack-protection logic within 1-2ms per cycle, fast enough for the 100ms fault response required by tool-safety standards. Sub-1µA power-down current lets stored packs retain calibration data for years. The 44-TSSOP package sits flat on the pack PCB alongside the cell-tap connector and protection FETs.
おすすめ
E-Bike and E-Scooter Battery Pack Monitor
E-mobility battery packs demand accurate per-cell monitoring, temperature sensing, and robust communication with the motor controller - exactly the workload the ATMEGA32HVB-8X3R targets. Its two LIN-capable USARTs interface with the e-bike display and motor ECU, while I2C connects to the cell-temp sensors. The integrated 12-bit ADC and HV amplifier handle 13S or 14S packs directly. With -40C to +85C industrial temperature range, the HVB operates from cold winter rides to summer charging heat. The 32KB Flash accommodates state-of-health learning and pack-ID storage.
おすすめ
Solar Battery Storage / UPS Monitoring
Solar storage banks and UPS battery cabinets use 24V-48V lead-acid or LiFePO4 packs that need reliable cell-level monitoring. The ATMEGA32HVB-8X3R's HV analog front-end handles these strings directly, while its 1.8-3.6V logic supply can be derived from the same rail via a small LDO. The 32KB Flash stores charge/discharge cycle history and supports remote firmware updates via SPI bootloader, useful for installed UPS systems. Two hardware comparators provide fast over-voltage and under-voltage interrupt response independent of firmware timing.
おすすめ
High-Side Current Shunt Monitor
Battery monitors often need current sensing via a high-side shunt, where the common-mode voltage can swing across the full pack voltage during charge and discharge. The ATMEGA32HVB-8X3R's HV differential amplifier is designed for exactly this: it rejects common-mode shifts up to 25V while digitizing the differential shunt voltage through the 12-bit ADC at 8MHz throughput. Combined with internal timer/counters, the HVB can integrate current over time for accurate coulomb counting - the foundation of state-of-charge estimation.
おすすめ
Industrial Battery Fuel Gauge Module
Standalone fuel-gauge modules for industrial batteries, robotics, and AGV fleets rely on accurate SOC/SOH reporting over I2C or CAN. The ATMEGA32HVB-8X3R provides the MCU core plus analog front-end in a single 44-TSSOP package, dramatically simplifying fuel-gauge module design. The 1KB EEPROM stores pack-specific calibration constants and cycle-life counters. The 8MHz AVR core executes model-based SOC algorithms within microseconds, and the 33 programmable I/O lines accommodate status LEDs, pushbuttons, and pack-ID EEPROM.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: ATMEGA32HVB-8X3R — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | ATMEGA32HVB-8X3 | ATMEGA16HVB | ATMEGA32HVB-4X3R |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-TSSOP | 44-TSSOP (same) | 44-TSSOP (same) | 44-TSSOP (same) |
| Flash Memory | 32 KB | 32 KB (same) | 16 KB (-50%) | 32 KB (same) |
| SRAM | 2 KB | 2 KB (same) | 1 KB (-50%) | 2 KB (same) |
| EEPROM | 1 KB | 1 KB (same) | 0.5 KB (-50%) | 1 KB (same) |
| Max Clock Speed | 8 MHz | 8 MHz (same) | 8 MHz (same) | 4 MHz (-50%) |
| HV Analog Inputs | 4-25 V (8 channels) | 4-25 V (same) | 4-25 V (same) | 4-25 V (same) |
| Packaging | Tape & Reel | Tube | Tape & Reel | Tape & Reel |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C (same) | -40 C to +85 C (same) | -40 C to +85 C (same) |
主な差別化要因
- Integrated high-voltage differential amplifier for direct battery cell sensing （vs ATmega32A-PU)
- Drop-in same-die tube-packaged alternative for prototype builds （vs ATMEGA32HVB-8X3)
- Lower-clock variant for power-budget designs （vs ATMEGA32HVB-4X3R)
設計ノート
The ATMEGA32HVB-8X3R separates its logic supply (VCC, 1.8-3.6V) from its HV analog domain (VBAT up to 25V). Best practice is to power VCC from a low-Iq LDO such as MCP1700 or MCP1755 connected to the pack's lowest cell, so the MCU remains alive when the pack is partially discharged. Decouple VCC with a 100nF ceramic close to the pin and add a bulk 4.7uF for ADC reference stability. The HV inputs should have TVS diodes (e.g., SMAJ series) clamping to within 25V absolute maximum, since inductive transients during contactor opening can exceed 30V briefly.
Place the 44-TSSOP ATMEGA32HVB-8X3R so its HV input traces run straight to the cell-tap connector with no shared return path near the 12-bit ADC traces. Keep AGND and GND connected at a single star point near the IC. The exposed pad (if present in the TSSOP-44 EP variant) should be soldered to a copper pour tied to GND for thermal relief, even though the HVB's typical dissipation is below 100mW. Route the two USART traces (LIN-capable) as a differential pair with 100 ohm impedance if line length exceeds 50mm, to maintain LIN signal integrity at 19.2kbps.
The 12-bit ADC on the ATMEGA32HVB-8X3R achieves ~10 effective bits when AREF is driven from a low-noise reference (e.g., MCP1525) rather than VCC. The internal HV differential amplifier introduces about 2 LSBs of gain error that can be calibrated out using the internal bandgap reference at startup. For current-shunt measurements, average 16-64 ADC samples to reduce noise to within +/-2 LSB at full scale. The two hardware comparators provide sub-microsecond fault response independent of ADC conversion time - use them for over-voltage/under-voltage interrupts, not the ADC threshold polling.
Do not exceed the 25V absolute maximum on any HV input pin; even a brief overvoltage can permanently damage the on-chip HV amplifier. Ensure firmware sets the HV input range configuration bits (5V/9V/12V/15V) before enabling the amplifier, or the amplifier outputs may saturate and produce incorrect ADC readings. The '8X3R' suffix indicates tape-and-reel packaging - do not substitute the '8X3' (tube) part on a pick-and-place line without confirming reel compatibility. In I2C mode, external pull-ups of 4.7k are required; the HVB's internal pull-ups (typically 20-50k) are too weak for reliable 400kHz operation.
コンプライアンス情報
Green-compliant per Microchip product page (Pb-free, Halogen-free). Not AEC-Q100 qualified - for automotive BMS designs requiring AEC-Q100, consult Microchip automotive-grade alternatives. RoHS and REACH compliant per distributor listings.
