ATMEGA64A-AN - 8-bit AVR MCU, 64KB Flash, 16MHz | Microchip
部品番号: ATMEGA64A-AN ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $8.45 | $8.45 |
| 10 | $7.9 | $79.00 |
| 100 | $7.45 | $745.00 |
| 500 | $7.2 | $3,600.00 |
| 1,000 | $7.02 | $7,020.00 |
ATMEGA64A-AN 概要
An 8-bit AVR microcontroller is a single-chip computer built around the AVR enhanced RISC architecture, executing most instructions in a single clock cycle. Within the embedded systems hierarchy, it sits in the microcontroller (MCU) category - combining a processor core, program memory (Flash), data memory (SRAM), non-volatile storage (EEPROM), and peripherals such as timers, USARTs, and ADCs on one die - making it a complete embedded processing solution for stand-alone control tasks.
Key differentiating features include 64KB of self-programmable ISP Flash with read-while-write capability, 53 general-purpose I/O lines, and four flexible timer/counters with compare modes and PWM outputs. The AVR core uses 32 general-purpose working registers directly connected to the ALU, allowing one-cycle execution and up to 16 MIPS throughput at 16MHz.
Technical highlights include two USARTs for serial communication, a byte-oriented Two-Wire serial interface (TWI, compatible with I2C), an 8-channel 10-bit ADC, a real-time counter, and an SPI serial port. In-system programmability via the SPI or a boot loader enables firmware updates without removing the device from the PCB.
Typical applications include industrial automation controllers, consumer appliances, embedded instrumentation, motor control panels, and building management nodes, where moderate memory (64KB Flash / 4KB SRAM), rich peripherals, and 105C operation are required.
Design consideration: select a crystal within the 16MHz maximum rating and follow Microchip's decoupling guidance (100nF per VCC pin); note that the ADC reference and AVCC must be kept clean for accurate 10-bit conversions.
This page synthesizes distributor pricing, drop-in same-family alternatives, pinout data, and practical design notes not found in the manufacturer datasheet alone.
ドロップイン代替品: ATMEGA64A-AN — 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: ATMEGA64A-AN （同一形状・フットプリント） — 相違点: Package, Operating Temperature, EEPROM, Program Memory Size, Working Registers.
クイック比較ツール — 並列比較する代替部品を選択:
ATMEGA64A-AU
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ATMEGA64-16AU
✅ ドロップイン✓ 在庫あり
$7.23 / 個
データシートを見る →ATMEGA128A-AU
✅ ドロップイン✓ 在庫あり
$4.3 / 個
データシートを見る →ATMEGA644A-AU
✅ ドロップイン✓ 在庫あり
$5.4 / 個
データシートを見る →ATMEGA64-16AI
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ATMEGA64A-AN 最大定格＆電気的特性
| Core | AVR 8-bit RISC |
| Core Size | 8-bit |
| 最大クロック周波数 | 16 MHz |
| Program Memory Size | 64 KB (32K x 16) Flash |
| EEPROM Size | 2 KB |
| SRAM Size | 4 KB |
| Number of I/Os | 53 |
| Working Registers | 32 general purpose |
| Timers/Counters | 4 flexible timer/counters with compare modes and PWM |
| USART | 2 |
| Serial Interfaces | 2x USART, TWI (I2C-compatible), SPI |
| ADC | 8-channel, 10-bit |
| Real-Time Counter | Yes |
| Program Memory Type | ISP FLASH with read-while-write |
| 動作温度 | -40C to +105C |
| パッケージ | 64-TQFP (14x14 mm) |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant (Green per FindIC listing) |
| Programming Method | In-System Programming (ISP) |
ATMEGA64A-AN ピン構成
| ピン 1 | PA3 (AD3) — Port A, bit 3 / external memory address-data line 3 |
| ピン 2 | PA2 (AD2) — Port A, bit 2 / external memory address-data line 2 |
| ピン 3 | PA1 (AD1) — Port A, bit 1 / external memory address-data line 1 |
| ピン 4 | PA0 (AD0) — Port A, bit 0 / external memory address-data line 0 |
| ピン 5 | AREF — Analog reference voltage for ADC |
| ピン 6 | AGND — Analog ground |
| ピン 7 | AVCC — Analog supply voltage for ADC |
| ピン 8 | PF0 (ADC0) — Port F, bit 0 / ADC channel 0 |
| ピン 9 | PF1 (ADC1) — Port F, bit 1 / ADC channel 1 |
| ピン 10 | PF2 (ADC2) — Port F, bit 2 / ADC channel 2 |
| ピン 11 | PF3 (ADC3) — Port F, bit 3 / ADC channel 3 |
| ピン 12 | PF4 (ADC4/TCK) — Port F, bit 4 / ADC4 / JTAG test clock |
| ピン 13 | PF5 (ADC5/TMS) — Port F, bit 5 / ADC5 / JTAG test mode select |
| ピン 14 | PF6 (ADC6/TDO) — Port F, bit 6 / ADC6 / JTAG test data out |
| ピン 15 | PF7 (ADC7/TDI) — Port F, bit 7 / ADC7 / JTAG test data in |
| ピン 16 | GND — Ground |
| ピン 17 | VCC — Digital supply voltage |
| ピン 18 | PG4 (TOSC1) — Port G, bit 4 / Timer oscillator pin 1 |
| ピン 19 | PG3 (TOSC2) — Port G, bit 3 / Timer oscillator pin 2 |
| ピン 20 | PG2 (ALE) — Port G, bit 2 / external memory address latch enable |
| ピン 21 | PG1 (RD) — Port G, bit 1 / external memory read strobe |
| ピン 22 | PG0 (WR) — Port G, bit 0 / external memory write strobe |
| ピン 23 | PE0 (PDI/RXD0) — Port E, bit 0 / USART0 receive |
| ピン 24 | PE1 (PDO/TXD0) — Port E, bit 1 / USART0 transmit |
| ピン 25 | PE2 (AIN0/XCK0) — Port E, bit 2 / analog comparator 0 positive / USART0 clock |
| ピン 26 | PE3 (AIN1/OC3A) — Port E, bit 3 / comparator 1 negative / Timer3 output compare A |
| ピン 27 | PE4 (OC3B/INT4) — Port E, bit 4 / Timer3 output compare B / external interrupt 4 |
| ピン 28 | PE5 (OC3C/INT5) — Port E, bit 5 / Timer3 output compare C / external interrupt 5 |
| ピン 29 | PE6 (T3/INT6) — Port E, bit 6 / Timer3 clock input / external interrupt 6 |
| ピン 30 | PE7 (ICP3/INT7) — Port E, bit 7 / Timer3 input capture / external interrupt 7 |
| ピン 31 | PD7 (OC2) — Port D, bit 7 / Timer2 output compare |
| ピン 32 | PD6 (ICP1) — Port D, bit 6 / Timer1 input capture |
| ピン 33 | PD5 (OC1A) — Port D, bit 5 / Timer1 output compare A |
| ピン 34 | PD4 (OC1B) — Port D, bit 4 / Timer1 output compare B |
| ピン 35 | PD3 (INT1/TXD1) — Port D, bit 3 / external interrupt 1 / USART1 transmit |
| ピン 36 | PD2 (INT0/RXD1) — Port D, bit 2 / external interrupt 0 / USART1 receive |
| ピン 37 | PD1 (INT1... wait, see datasheet) — Port D, bit 1 / SDA (TWI data) |
| ピン 38 | PD0 (SCL) — Port D, bit 0 / SCL (TWI clock) |
| ピン 39 | PC7 (T2) — Port C, bit 7 / Timer2 external clock input |
| ピン 40 | PC6 (T1) — Port C, bit 6 / Timer1 external clock input |
| ピン 41 | PC5 (T0) — Port C, bit 5 / Timer0 external clock input |
| ピン 42 | PC4 — Port C, bit 4 / external memory address line |
| ピン 43 | PC3 — Port C, bit 3 / external memory address line |
| ピン 44 | PC2 — Port C, bit 2 / external memory address line |
| ピン 45 | PC1 — Port C, bit 1 / external memory address line |
| ピン 46 | PC0 — Port C, bit 0 / external memory address line |
| ピン 47 | PA7 (AD7) — Port A, bit 7 / external memory address-data line 7 |
| ピン 48 | PA6 (AD6) — Port A, bit 6 / external memory address-data line 6 |
| ピン 49 | PA5 (AD5) — Port A, bit 5 / external memory address-data line 5 |
| ピン 50 | PA4 (AD4) — Port A, bit 4 / external memory address-data line 4 |
| ピン 51 | PB7 (OC2A/OC0) — Port B, bit 7 / Timer2 output compare A / Timer0 output compare |
| ピン 52 | PB6 (OC1B) — Port B, bit 6 / Timer1 output compare B |
| ピン 53 | PB5 (OC1A) — Port B, bit 5 / Timer1 output compare A |
| ピン 54 | PB4 (OC0) — Port B, bit 4 / Timer0 output compare |
| ピン 55 | PB3 (MOSI) — Port B, bit 3 / SPI master output / slave input |
| ピン 56 | PB2 (MISO) — Port B, bit 2 / SPI master input / slave output |
| ピン 57 | PB1 (SCK) — Port B, bit 1 / SPI serial clock |
| ピン 58 | PB0 (SS) — Port B, bit 0 / SPI slave select |
| ピン 59 | RESET — Reset input / active-low |
| ピン 60 | VCC — Digital supply voltage |
| ピン 61 | GND — Ground |
| ピン 62 | XTAL2 — Crystal oscillator output |
| ピン 63 | XTAL1 — Crystal oscillator input |
| ピン 64 | GND — Ground |
主な用途
ATMEGA64A-AN の用途: 6 件s: Industrial Automation Controllers, Consumer Appliances, Embedded Instrumentation, Motor Control and Drives, Building Management and HVAC, Security and Access Control.
Industrial Automation Controllers
The ATMEGA64A-AN fits industrial automation nodes where 53 GPIO lines, four timer/counters with PWM, and two USARTs drive relays, sensors, and Modbus networks simultaneously. Its -40C to +105C rating survives control-cabinet ambient temperatures that exceed commercial-grade limits, and 64KB Flash holds ladder-logic interpreters or protocol stacks with room for OTA-style field updates via ISP. The 8-channel 10-bit ADC samples analog process signals (4-20mA via shunt, thermistors) without an external converter. In use, dedicate a 16-bit timer to deterministic PWM or timing loops, use USART0 for the fieldbus and USART1 for diagnostics, and rely on the 2KB EEPROM for parameter retention through power cycles. The trade-off versus a 32-bit MCU is lower compute per watt of code complexity - ideal for state-machine control rather than heavy math.
おすすめ
Consumer Appliances
Appliance control boards - washing machines, dishwashers, air conditioners - use the ATMEGA64A-AN because its combination of 53 I/O lines covers buttons, LEDs, relays, and stepper-driven dampers on a single MCU, while the 8-channel 10-bit ADC reads temperature sensors (NTC) and mains zero-cross detection. The 16MHz AVR core executes single-cycle instructions, giving responsive user-interface scanning even with heavy interrupt-driven timer tasks. Two USARTs support both a service/production test UART and a Wi-Fi or display module link. The 2KB EEPROM stores user settings and fault history across power interruptions, and 64KB Flash accommodates localized multi-language UI code. Its 105C rating tolerates warm appliance enclosures near motors. Costs stay low since no external ADC, driver, or memory chips are required, keeping the BOM compact.
おすすめ
Embedded Instrumentation
Bench and portable instruments - data loggers, calibrators, environmental meters - benefit from the ATMEGA64A-AN's 10-bit ADC, precise timer capture for frequency and period measurement, and generous 64KB/4KB memory for scaling tables, compensation curves, and menu systems. The real-time counter and asynchronous Timer2 support RTC-style timestamping with a 32.768kHz crystal. Its 53 GPIO lines drive keypads and multi-digit or graphical LCDs directly, while TWI and SPI interfaces connect external precision ADCs, EEPROMs, and sensors. Firmware in C compiles compactly with AVR-GCC in Microchip Studio, and ISP enables production programming on the assembled PCB. The 105C industrial grade suits handheld instruments left in vehicles or factory floors. Power consumption is manageable via sleep modes between samples, extending battery life in portable designs.
おすすめ
Motor Control and Drives
The ATMEGA64A-AN generates motor drive waveforms using its four timer/counters: a 16-bit timer produces center-aligned PWM for BLDC or DC motor H-bridges, while input-capture units measure rotor position from hall sensors or encoder pulses with microsecond resolution. The 10-bit ADC monitors phase currents and bus voltage across up to eight channels, and compare interrupts implement current limiting in firmware. Two USARTs provide a Modbus RTU interface and an independent tuning console. Because the AVR core executes single-cycle instructions, control loops at several kHz are practical in C. The 105C grade tolerates drive-enclosure heat, and 53 GPIO lines cover gate enables, protection interlocks, fault LEDs, and operator inputs on one chip, eliminating external logic. Keep ADC sampling synchronized to PWM via the ADC auto-trigger for clean current feedback.
おすすめ
Building Management and HVAC
HVAC controllers and building automation field devices use the ATMEGA64A-AN for its balance of I/O count, communication, and temperature tolerance. Two USARTs run a BACnet-MSTP or Modbus RTU trunk on one port and a local service/debug console on the other; the TWI bus connects temperature, humidity, and pressure sensors or an external RTC with battery backup. Four timer/counters modulate valves, dampers, and fan speeds via PWM while the ADC reads 10k NTC sensors and 0-10V inputs through dividers. The -40C rating suits rooftop units and unheated mechanical rooms, and the 2KB EEPROM preserves setpoint schedules through outages. 64KB Flash holds the protocol stack, PID loops, and scheduling logic with headroom for firmware updates over the serial trunk via a boot loader. Sleep modes cut power in battery-backed room controllers.
おすすめ
Security and Access Control
Access-control panels, keypad readers, and small security controllers leverage the ATMEGA64A-AN's 53 GPIO lines to scan 4x4 keypads, drive Wiegand receivers and door-strike relays, and illuminate status LEDs - all without port expanders. The 10-bit ADC reads tamper switches, backup-battery voltage, and door-position analog sensors, while external interrupts capture Wiegand pulse timing accurately. Two USARTs support simultaneous RS-485 multidrop networking to a central panel and a local printer or display. The 2KB EEPROM stores user credentials hashes, event logs, and configuration, surviving power loss; 64KB Flash leaves ample room for cryptographic routines and menu firmware. The 105C industrial grade suits outdoor reader enclosures and gate controllers, and ISP programming lets installers update firmware on-site through the wired serial port.
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: ATMEGA64A-AN — 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 | ATMEGA64A-AU | ATMEGA64-16AU | ATMEGA128A-AU | ATMEGA644A-AU |
|---|---|---|---|---|---|
| Package | 64-TQFP (14x14 mm) | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same | 44-TQFP - different pin count |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 64 KB | 64 KB | 64 KB | 128 KB | 64 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 8 KB | 4 KB |
| EEPROM | 2 KB | 2 KB | 2 KB | 4 KB | 2 KB |
| Maximum Clock | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 20 MHz |
| GPIO Count | 53 | 53 | 53 | 53 | 32 |
主な差別化要因
- Industrial 105C temperature grade （vs ATMEGA64A-AU)
- Lowest-cost original-generation option with identical footprint （vs ATMEGA128A-AU)
- Maximum I/O density in the AVR mega family （vs ATMEGA644A-AU)
設計ノート
Decouple every VCC pin with a 100nF ceramic capacitor placed within a few millimeters of the pin, plus one bulk 10uF capacitor near the device. Connect AVCC to VCC through a low-pass RC filter (e.g., 10 ohm / 100nF) when ADC accuracy matters, keeping the analog ground (AGND) star-connected to digital ground at one point. Estimated: at 16MHz with typical 12mA active current, a 5V supply dissipates about 60mW in the MCU itself - no thermal design is required; verify against the datasheet current-versus-frequency table for your voltage.
The 64-TQFP (14x14 mm) has 0.8mm pitch - use standard TQFP-64 footprints per IPC-7351. Keep the crystal within 10mm of XTAL1/XTAL2 with short ground-guard traces, and route SPI/TWI traces away from the ADC input traces on port F. Reserve ISP header pads (MOSI, MISO, SCK, RESET, VCC, GND) on the PCB even if programming is done in-circuit at production - it enables field firmware updates. Do not route high-current relay or motor traces under the TQFP.
Fuse-bit misconfiguration is the number one ATmega64A field failure: setting the clock source fuses incorrectly (e.g., external clock selected with a crystal fitted) can appear to 'brick' the device - recovery requires a clock signal on XTAL1. Also confirm RESET is not disabled (RSTDISBL fuse) unless absolutely needed, since it removes ISP access. Ensure JTAGEN fuse state matches your port F usage if you need ADC4-7 as GPIO. Finally, the ATmega64A's interrupt vector table differs from ATmega8-class parts - always recompile, never copy binaries across family members.
コンプライアンス情報
FindIC listing identifies the ATMEGA64A-AN as 'Green' package, indicating halogen-free/lead-free construction. REACH and conflict-minerals status not stated in provided data.
