ATMEGA88PA-MMHR - 8-bit AVR MCU 20MHz 8KB Flash 28-VQFN | Microchip
部品番号: ATMEGA88PA-MMHR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $3.1 | $3.10 |
| 10 | $2.85 | $28.50 |
| 100 | $2.55 | $255.00 |
| 500 | $2.3 | $1,150.00 |
| 1,000 | $2.05 | $2,050.00 |
ATMEGA88PA-MMHR 概要
A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, program memory, data memory, and peripherals into one chip, forming the lowest tier of the embedded-processing hierarchy (MCU -> system-on-chip -> application processor -> computing platform). The AVR family popularized the Harvard-architecture 8-bit RISC MCU, and the ATmega88 line sits in the mid-range ATmega segment, sitting below the ATmega328P used in Arduino boards and above the ATtiny series.
Key features include the picoPower technology suite for sub-uA sleep currents, 23 general-purpose I/O lines, three flexible timer/counters with compare modes, a 10-bit 8-channel ADC, and both TWI (I2C-compatible) and SPI serial interfaces. The 130-instruction AVR RISC core executes most single-clock instructions, delivering up to 20 MIPS at 20 MHz with 32 general-purpose working registers directly connected to the ALU.
The PA suffix denotes the picoPower generation: it improves on the ATMEGA88A with lower power consumption across all sleep modes, supporting battery-powered and energy-harvesting designs. In-System Programmable (ISP) Flash with read-while-write support, plus debugWIRE on-chip debugging through the RESET line, simplify firmware updates and production programming using tools such as the MPLAB SNAP.
Typical applications include consumer appliances, HVAC and building automation nodes, battery-powered sensor end-points, small motor-control and LED-lighting controllers, and general embedded products that need a proven, low-cost 8-bit platform.
Design consideration: verify the supply-voltage-to-frequency derating - full 20 MHz operation requires a 4.5 V to 5.5 V supply, while 1.8 V operation limits the clock to 4 MHz per the AVR speed grade.
This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not consolidated in the manufacturer datasheet, providing buyers and engineers a single citable reference for the ATMEGA88PA-MMHR.
ドロップイン代替品: ATMEGA88PA-MMHR — 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: ATMEGA88PA-MMHR （同一形状・フットプリント） — 相違点: Package, Communication Interfaces, Operating Temperature, Core Processor, RoHS Status.
クイック比較ツール — 並列比較する代替部品を選択:
ATMEGA88A-MMHR
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$0.86 / 個
データシートを見る →ATMEGA168PA-MMHR
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ATMEGA48PA-MMHR
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$1.62 / 個
データシートを見る →ATMEGA328P-MMHR
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ATMEGA88PA-CCUR
✅ ドロップイン✓ 在庫あり
$1.08 / 個
データシートを見る →ATMEGA88PA-MMHR 最大定格＆電気的特性
| Core Processor | AVR (8-bit RISC) |
| Core Size | 8-bit |
| Speed (Max Clock) | 20 MHz |
| Flash Memory | 8 KB (4K x 16) |
| EEPROM | 512 B |
| SRAM | 1 KB |
| General Purpose I/O | 23 |
| Timers/Counters | 3 (two 8-bit, one 16-bit) |
| ADC Resolution | 10-bit |
| Communication Interfaces | TWI (I2C), SPI, USART |
| Supply Voltage Range | 2.5 V / 3.3 V / 5 V operating points (1.8 V to 5.5 V family range) |
| パッケージ | 28-VQFN (4x4 mm) with exposed pad |
| 実装タイプ | Surface Mount |
| Packaging | Tape & Reel (R suffix) |
| Technology | picoPower low-power AVR |
| Programming / Debug | ISP (In-System Programming), debugWIRE |
| ライフサイクル状態 | ACTIVE |
| RoHS ステータス | Compliant |
ATMEGA88PA-MMHR ピン構成
| ピン 1 | PC6 (RESET) — Reset input / debugWIRE pin, active low |
| ピン 2 | PD0 (RXD) — Port D bit 0 / USART receive |
| ピン 3 | PD1 (TXD) — Port D bit 1 / USART transmit |
| ピン 4 | PD2 (INT0) — Port D bit 2 / external interrupt 0 |
| ピン 5 | PD3 (INT1/OC2B) — Port D bit 3 / external interrupt 1 / Timer2 PWM output B |
| ピン 6 | PD4 (T0/XCK) — Port D bit 4 / Timer0 external clock / USART external clock |
| ピン 7 | VCC — Digital supply voltage |
| ピン 8 | GND — Ground |
| ピン 9 | PB6 (XTAL1/TOSC1) — Port B bit 6 / crystal oscillator pin 1 / Timer oscillator |
| ピン 10 | PB7 (XTAL2/TOSC2) — Port B bit 7 / crystal oscillator pin 2 / Timer oscillator |
| ピン 11 | PD5 (T1/OC0B) — Port D bit 5 / Timer1 external clock / Timer0 PWM output B |
| ピン 12 | PD6 (AIN0/OC0A) — Port D bit 6 / analog comparator positive input / Timer0 PWM output A |
| ピン 13 | PD7 (AIN1) — Port D bit 7 / analog comparator negative input |
| ピン 14 | PB0 (ICP1/CLKO) — Port B bit 0 / Timer1 input capture / system clock output |
| ピン 15 | PB1 (OC1A) — Port B bit 1 / Timer1 PWM output A |
| ピン 16 | PB2 (SS/OC1B) — Port B bit 2 / SPI slave select / Timer1 PWM output B |
| ピン 17 | PB3 (MOSI/OC2A) — Port B bit 3 / SPI master output / Timer2 PWM output A |
| ピン 18 | PB4 (MISO) — Port B bit 4 / SPI master input |
| ピン 19 | PB5 (SCK) — Port B bit 5 / SPI serial clock |
| ピン 20 | AVCC — ADC supply voltage |
| ピン 21 | AREF — ADC analog reference input |
| ピン 22 | GND — Ground |
| ピン 23 | PC0 (ADC0) — Port C bit 0 / ADC channel 0 |
| ピン 24 | PC1 (ADC1) — Port C bit 1 / ADC channel 1 |
| ピン 25 | PC2 (ADC2) — Port C bit 2 / ADC channel 2 |
| ピン 26 | PC3 (ADC3) — Port C bit 3 / ADC channel 3 |
| ピン 27 | PC4 (ADC4/SDA) — Port C bit 4 / ADC channel 4 / TWI data |
| ピン 28 | PC5 (ADC5/SCL) — Port C bit 5 / ADC channel 5 / TWI clock |
主な用途
ATMEGA88PA-MMHR の用途: 6 件s: Battery-Powered Sensor End Points, Home Appliance and HVAC Control, LED Lighting and Dimming Controllers, Small Motor Control and Fan Drivers, Industrial HMI and Front-Panel Controllers, Consumer Electronics and Toys.
Battery-Powered Sensor End Points
The ATMEGA88PA-MMHR fits battery-powered sensor nodes because picoPower technology cuts current draw in power-down and power-save sleep modes, letting a coin-cell or two-AA supply last months to years. The node sleeps with only an 8-bit timer or pin-change interrupt active, wakes to sample a sensor over the 10-bit ADC or TWI bus, processes the reading within the 1 KB SRAM, then returns to sleep. Firmware must be kept lean to fit the 8 KB Flash; running the clock at 1-4 MHz from the internal RC oscillator reduces active current dramatically. Because full 20 MHz operation needs 4.5-5.5 V, low-voltage battery designs should accept the derated clock rather than a boost converter.
おすすめ
Home Appliance and HVAC Control
White-goods and HVAC sub-controllers use the ATMEGA88PA-MMHR for its three flexible timer/counters, which generate PWM for fan and damper motor drive, and the 10-bit ADC, which reads NTC temperature sensors and pot Setpoint inputs directly. The 23 GPIO lines switch relays and read panel buttons without external port expanders, while the watchdog timer adds safety for mains-adjacent equipment. The picoPower profile suits standby-mode energy regulations, since the controller can power down between state changes. Operating from a 5 V rail derived from the appliance supply allows the full 20 MHz clock for responsive control loops. debugWIRE over the RESET line simplifies firmware iteration during appliance certification cycles.
おすすめ
LED Lighting and Dimming Controllers
Dimmable LED drivers benefit from the ATMEGA88PA-MMHR hardware PWM: the 16-bit Timer/Counter1 provides high-resolution phase-correct PWM for flicker-free dimming, while 8-bit timers handle auxiliary channels. The 10-bit ADC monitors LED string current and thermistor temperature, enabling closed-loop current regulation and thermal foldback entirely in firmware. The 5 V tolerant architecture interfaces simply with MOSFET gate drivers from a supply derived from the mains SMPS. Low standby power supports DALI-compliant idle requirements, and the TWI port links to DALI or DMX daughter transceivers. With 8 KB Flash there is room for a dimming curve, communication parser, and fault-handling state machine.
おすすめ
Small Motor Control and Fan Drivers
Brushed DC and small BLDC fan controllers exploit the ATMEGA88PA-MMHR compare-match outputs for complementary PWM, plus the analog comparator and ADC for back-EMF sensing and stall detection. The 16-bit timer captures input events such as hall-sensor or tacho pulses, allowing closed-loop speed regulation without external counting logic. Its 5 V operation directly drives logic-level MOSFET pre-drivers, and the 8 KB Flash holds commutation tables plus a PID loop. The picoPower idle modes suit duty-cycled pump applications, waking on a periodic timer to jog the motor. Debugging via debugWIRE on the single RESET line leaves the remaining 23 GPIO free for motor and protection signals.
おすすめ
Industrial HMI and Front-Panel Controllers
Front-panel controllers for industrial equipment use the ATMEGA88PA-MMHR to scan keypad matrices, drive 7-segment or multiplexed LED displays, and communicate commands to a main controller over SPI or TWI. The 23 GPIO lines cover a 4x4 keypad plus display segments directly; Timer/Counter2 keeps a display refresh with zero CPU overhead using its compare interrupt. Noise immunity comes from the internal brown-out detector and watchdog, which reset the panel cleanly through supply dips common on factory floors. The 5 V supply lets it meet legacy industrial logic levels without level shifting, and the exposed-pad VQFN grounds well for EMC. 8 KB Flash fits display fonts plus a robust communication parser.
おすすめ
Consumer Electronics and Toys
Cost-sensitive consumer products such as toys, small appliances, and novelty electronics choose the ATMEGA88PA-MMHR for its low unit price at 1000-piece quantities and its single-chip integration of clock, ADC, PWM, and serial peripherals - eliminating external components. The internal 8 MHz RC oscillator removes the need for a crystal in non-timing-critical designs, freeing two GPIOs (PB6/PB7) for I/O and cutting BOM cost. 8 KB Flash and 1 KB SRAM handle sound-effect playback state machines, LED animation, and button handling. The picoPower profile supports automatic power-down in battery toys, extending shelf life. Tape-and-reel packaging suits high-volume automated assembly.
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: ATMEGA88PA-MMHR — 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 | ATMEGA88A-MMHR | ATMEGA168PA-MMHR | ATMEGA48PA-MMHR | ATMEGA328P-MMHR |
|---|---|---|---|---|---|
| Package | 28-VQFN (4x4 mm) | 28-VQFN (4x4 mm) - same | 28-VQFN (4x4 mm) - same | 28-VQFN (4x4 mm) - same | 28-VQFN (4x4 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 8 KB (4K x 16) | 8 KB (4K x 16) | 16 KB (8K x 16) | 4 KB (2K x 16) | 32 KB (16K x 16) |
| SRAM | 1 KB | 1 KB | 1 KB | 512 B | 2 KB |
| EEPROM | 512 B | 512 B | 512 B | 256 B | 1 KB |
| Max Clock Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| GPIO Count | 23 | 23 | 23 | 23 | 23 |
| Low-Power Technology | picoPower (PA) | Standard (higher sleep current) | picoPower (PA) | picoPower (PA) | picoPower (P) |
主な差別化要因
- picoPower sleep currents at mid-range price （vs ATMEGA88A-MMHR)
- Flash-per-dollar upgrade path without PCB change （vs ATMEGA168PA-MMHR)
- Balanced memory for the footprint （vs ATMEGA48PA-MMHR)
- Cost optimization versus the 328P flagship （vs ATMEGA328P-MMHR)
設計ノート
Match the supply rail to the required clock: 20 MHz needs 4.5-5.5 V per the AVR speed-grade curve, while 3.3 V systems should cap the clock near 8 MHz and 1.8 V near 4 MHz (Estimated: from the AVR frequency-vs-VCC derating relationship; consult the family datasheet graph for exact envelope). Provide 100 nF ceramic decoupling directly across VCC/GND plus 100 nF on AVCC with a 10 uH ferrite or low-pass RC feeding AVCC from the digital rail to keep ADC noise low. Always connect the exposed pad to GND.
Keep the RESET (PC6, pin 1) trace short and fit a 10 k pull-up; RESET doubles as the debugWIRE and ISP line, so route it away from switching nodes. Place the 16 MHz crystal (if used) within 5-10 mm of PB6/PB7 with 12-22 pF load capacitors and a guard ground ring. Separate the analog ground region under AREF/AVCC/ADC0-5 from digital return currents, joining at a single point near the exposed pad.
Do not migrate firmware from ATMEGA88A or ATMEGA328P assuming identical fuse defaults - extended fuse values (BOD level, brown-out enable) differ across family members and an incorrect fuse write can brick the part to the point of needing high-voltage parallel rescue. Also note ADC6/ADC7 exist only on QFN/TQFP packages, so code written for a 32-pin variant referencing those channels will not compile for this 28-pad part. Confirm sleep-mode current figures against the picoPower datasheet tables, not the non-PA revision.
Estimated: at 20 MHz and 5 V with all GPIO lightly loaded, an AVR ATmega88 typically dissipates well under 200 mW, so the exposed-pad VQFN (4x4 mm) with a modest ground pour keeps junction temperature far below the absolute maximum. Thermal management becomes relevant only when driving many LEDs or high-capacitance loads from GPIO pins - keep per-pin sink/source currents within datasheet absolute maximums and add copper area if aggregate port current approaches the port limit.
コンプライアンス情報
Distributor listings indicate RoHS compliance for the ATMEGA88PA-MMHR. AEC-Q100 qualification is not claimed for this consumer/industrial grade part (automotive variants use separate order codes). REACH, halogen-free, and conflict-minerals status should be confirmed via the Microchip compliance portal.
