ATMEGA1609-AUR - 8-bit AVR MCU 20MHz 16KB Flash | Microchip
MPN： ATMEGA1609-AUR ✓ 啟用中ATMEGA1609-AUR 概覽
An 8-bit microcontroller (MCU) integrates a processor core, program memory, data memory, and peripherals such as timers, ADC, and communication interfaces on a single chip. The megaAVR 0-series sits in the general-purpose 8-bit MCU hierarchy (AVR core -> megaAVR -> microcontroller -> embedded processor) and is designed for real-time control, sensing, and connectivity tasks in cost-sensitive embedded systems.
Key features include the AVR RISC core with hardware multiplier for efficient arithmetic, Core Independent Peripherals (CIPs) such as the Configurable Custom Logic (CCL), Event System, and Watchdog Timer that operate without CPU intervention, a 10-bit ADC with up to 12 input channels, and multiple communication interfaces including SPI, TWI (I2C), and USART. The wide 1.8V to 5.5V supply range supports battery and industrial designs.
The megaAVR 0-series architecture combines a single-cycle I/O register file with the Event System, a routing network that lets peripherals signal each other directly, cutting latency and power versus software-driven solutions. The device also carries Functional Safety (FuSa) support documentation, easing IEC 61508 and ISO 13849 design flows.
Typical applications include industrial automation and motor control, home appliances and HVAC systems, and capacitive-touch or sensor-driven IoT nodes. The 20 MHz clock, 41 GPIO, and rich peripheral set fit compact control boards.
Design consideration: use the unified UPDI (single-pin) programming interface to free board space, and validate 20 MHz operation across your full supply and temperature range per the datasheet derating guidance.
This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not consolidated in the manufacturer datasheet.
直接替換替代品，適用於 ATMEGA1609-AUR — 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： ATMEGA1609-AUR （相同外形與佔位） — 差異在於 Series, Core Processor, Peripherals, Package, Operating Temperature.
ATMEGA1609-AFR
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA1608-AFR
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA1609-AU
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATMEGA3209-AU
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATMEGA4809-AU
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ATMEGA809-AU
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATMEGA1609-AUR 最大額定值與電氣特性
| Core Processor | AVR 8-bit |
| Core Size | 8-bit |
| 最大時脈頻率 | 20 MHz |
| Program Memory Size | 16 KB (16K x 8) FLASH |
| Data RAM Size | 2 KB |
| EEPROM Size | 256 bytes |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Number of I/O | 41 I/O |
| ADC Resolution | 10 bit |
| 封裝 | 48-TQFP (7x7 mm) |
| 安裝方式 | SMD/SMT |
| Series | megaAVR 0, Functional Safety (FuSa) |
| Connectivity | I2C, SPI, USART |
| Program Memory Type | FLASH |
| Product Category | 8-bit Microcontrollers - MCU |
| Base Product Number | ATMEGA1609 |
| RoHS 狀態 | RoHS compliant (per distributor RoHS Details) |
| Packaging | Tape & Reel (TR) |
ATMEGA1609-AUR 腳位配置
| 腳位 1 | VDD — Power supply (1.8V to 5.5V) |
| 腳位 2 | GND — Ground |
| 腳位 3 | PB5 — Port B bit 5, digital I/O, analog/digital peripheral mux |
| 腳位 4 | PB4 — Port B bit 4, digital I/O, analog/digital peripheral mux |
| 腳位 5 | PB3 — Port B bit 3, digital I/O, analog/digital peripheral mux |
| 腳位 6 | PB2 — Port B bit 2, digital I/O, analog/digital peripheral mux |
| 腳位 7 | PB1 — Port B bit 1, digital I/O, analog/digital peripheral mux |
| 腳位 8 | PB0 — Port B bit 0, digital I/O, analog/digital peripheral mux |
| 腳位 9 | PA7 — Port A bit 7, digital I/O / ADC input |
| 腳位 10 | PA6 — Port A bit 6, digital I/O / ADC input |
| 腳位 11 | PA5 — Port A bit 5, digital I/O / ADC input |
| 腳位 12 | PA4 — Port A bit 4, digital I/O / ADC input |
| 腳位 13 | PA3 — Port A bit 3, digital I/O / ADC input |
| 腳位 14 | PA2 — Port A bit 2, digital I/O / ADC input |
| 腳位 15 | PA1 — Port A bit 1, digital I/O / ADC input |
| 腳位 16 | PA0 — Port A bit 0, digital I/O / ADC input |
| 腳位 17 | RESET/UPDI — Reset input or Unified Program Debug Interface |
| 腳位 18 | VDDIO2 — Port C separate I/O supply |
| 腳位 19 | GNDIO2 — Port C separate I/O ground return |
| 腳位 20 | PF7 — Port F bit 7, digital I/O / ADC input |
| 腳位 21 | PF6 — Port F bit 6, digital I/O / ADC input |
| 腳位 22 | PF5 — Port F bit 5, digital I/O / ADC input |
| 腳位 23 | PF4 — Port F bit 4, digital I/O / ADC input |
| 腳位 24 | PF3/XTAL1 — Port F bit 3 or crystal input |
| 腳位 25 | PF2/XTAL2 — Port F bit 2 or crystal output |
| 腳位 26 | PF1 — Port F bit 1, digital I/O / ADC input |
| 腳位 27 | PF0 — Port F bit 0, digital I/O / ADC input |
| 腳位 28 | GND — Ground |
| 腳位 29 | VDD — Power supply |
| 腳位 30 | PC7 — Port C bit 7, digital I/O (VDDIO2 domain) |
| 腳位 31 | PC6 — Port C bit 6, digital I/O (VDDIO2 domain) |
| 腳位 32 | PC5 — Port C bit 5, digital I/O (VDDIO2 domain) |
| 腳位 33 | PC4 — Port C bit 4, digital I/O (VDDIO2 domain) |
| 腳位 34 | PC3 — Port C bit 3, digital I/O (VDDIO2 domain) |
| 腳位 35 | PC2 — Port C bit 2, digital I/O (VDDIO2 domain) |
| 腳位 36 | PC1 — Port C bit 1, digital I/O (VDDIO2 domain) |
| 腳位 37 | PC0 — Port C bit 0, digital I/O (VDDIO2 domain) |
| 腳位 38 | PD7 — Port D bit 7, digital I/O / ADC input |
| 腳位 39 | PD6 — Port D bit 6, digital I/O / ADC input |
| 腳位 40 | PD5 — Port D bit 5, digital I/O / ADC input |
| 腳位 41 | PD4 — Port D bit 4, digital I/O / ADC input |
| 腳位 42 | PD3 — Port D bit 3, digital I/O / ADC input |
| 腳位 43 | PD2 — Port D bit 2, digital I/O / ADC input |
| 腳位 44 | PD1 — Port D bit 1, digital I/O / ADC input |
| 腳位 45 | PD0 — Port D bit 0, digital I/O / ADC input |
| 腳位 46 | PE3 — Port E bit 3, digital I/O / ADC input |
| 腳位 47 | PE2 — Port E bit 2, digital I/O / ADC input |
| 腳位 48 | PE1 — Port E bit 1, digital I/O / ADC input |
典型應用
ATMEGA1609-AUR 適用於 6 應用s: Industrial Automation and Control, Home Appliances and HVAC, Capacitive Touch HMI Panels, IoT Sensor Nodes, Motor Control and Fan Drivers, Functional Safety Subsystems.
Industrial Automation and Control
The ATMEGA1609-AUR fits industrial control nodes because its Core Independent Peripherals and Functional Safety documentation support deterministic real-time behavior required by factory automation. The Configurable Custom Logic (CCL) can implement glue logic and safety interlocks in hardware, while the Event System routes timer and comparator signals without CPU latency, offloading tasks such as gate-drive timing and fault shutdown. The 10-bit ADC with 41 GPIO handles sensor acquisition and actuator outputs on one chip, and the 1.8V to 5.5V supply range tolerates industrial supply variation. Placing time-critical functions in CIPs reduces interrupt jitter, improving control-loop repeatability versus software-only implementations on conventional 8-bit MCUs.
推薦
Home Appliances and HVAC
Appliance and HVAC boards benefit from the ATMEGA1609-AUR's low cost, wide 1.8V to 5.5V supply range, and rich peripheral set in a single 48-pin TQFP. The 20 MHz AVR core with hardware multiplier handles compressor or fan control algorithms, while the 10-bit ADC reads NTC thermistors and user potentiometers across 12 channels. The Watchdog Timer and BOD provide robust operation in noisy motor environments, and the Event System lets a TCB timer drive PWM outputs continuously even during firmware fault handling. With 16 KB Flash, both control logic and a user-interface state machine fit without banking, keeping the BOM to one MCU plus power components.
推薦
Capacitive Touch HMI Panels
The megaAVR 0-series includes Microchip's capacitive-touch acquisition peripherals, making the ATMEGA1609-AUR a natural fit for touch buttons, sliders, and wheels on appliance and industrial HMI panels. The ADC-based touch sensing combined with hardware-driven acquisition timing minimizes CPU overhead, while the remaining Flash and GPIO drive LEDs, buzzers, and displays from the same device. Using one MCU for both touch sensing and application logic removes a dedicated touch controller from the BOM. The 48-pin TQFP provides enough I/O to multiplex an LCD segment driver over GPIO plus a USART or I2C link to a host, with the Event System enabling low-latency touch-response indication.
推薦
IoT Sensor Nodes
For battery-powered IoT sensor nodes, the ATMEGA1609-AUR offers low-power sleep modes, a 1.8V minimum supply for direct lithium-cell operation, and integrated peripherals that reduce external component count. The node firmware typically sleeps in power-down with the RTC or PIT running, waking periodically to sample the 10-bit ADC, process data with the hardware multiplier, and transmit over a USART-linked radio module. With 16 KB Flash and 2 KB SRAM, protocol handling plus sensor filtering fits comfortably. The single-pin UPDI interface simplifies in-field firmware updates through one test point, and 41 GPIO allow direct drive of status LEDs, switches, and sensor power gating to cut quiescent current.
推薦
Motor Control and Fan Drivers
The ATMEGA1609-AUR drives BLDC fans and small motors using its TCA timer PWM outputs and Event System-based fault shutdown. The CCL can gate PWM immediately on a comparator over-current event without software intervention, protecting the power stage in microseconds. The 20 MHz core with hardware multiplier executes commutation and speed-control loops, while the 10-bit ADC samples current shunts and back-EMF for sensorless schemes. The 48-pin TQFP leaves ample GPIO for hall sensors, tachometer input, and I2C communication to a host controller. Operating from a 5V rail derived from the motor supply, the MCU's BOD and WDT ensure safe restart after supply disturbances.
推薦
Functional Safety Subsystems
As a member of Microchip's megaAVR 0-series Functional Safety (FuSa) family, the ATMEGA1609-AUR is intended for designs targeting safety standards, supported by Microchip's safety documentation package covering diagnostic coverage of the core, memory, and peripherals. Built-in mechanisms such as the CRC scan, WDT with window mode, BOD, and clock failure detection enable designers to implement safety functions like relay-test pulse supervision or sensor plausibility checking. The CCL and Event System allow independent hardware channels to cross-check software decisions, supporting structured diagnostic architectures on a single low-cost 8-bit device without a companion safety supervisor IC in many up-to-SIL-appropriate designs.
推薦
推薦產品摘要
工程參考資料，適用於 ATMEGA1609-AUR — 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 | ATMEGA1609-AFR | ATMEGA1608-AFR | ATMEGA3209-AU | ATMEGA4809-AU | ATMEGA809-AU |
|---|---|---|---|---|---|---|
| Package | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16 KB | 16 KB | 16 KB | 32 KB | 48 KB | 8 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 4 KB | 6 KB | 1 KB |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Number of I/O | 41 I/O | 41 I/O | 41 I/O | 41 I/O | 41 I/O | 41 I/O |
| Supply Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Qualification Grade | Standard industrial (FuSa supported) | Automotive (AEC-Q100) | Automotive (AEC-Q100) | Standard industrial | Standard industrial | Standard industrial |
| Packaging | Tape & Reel (AUR suffix) | Tape & Reel | Tape & Reel | Tray (AU) | Tray (AU) | Tray (AU) |
主要差異化特點
- Automotive-grade pin-compatible variant available (對比ATMEGA3209-AU)
- Balanced memory size at lowest cost in 48-pin family (對比ATMEGA4809-AU)
- Full 41-I/O pinout retained at smaller memory (對比ATMEGA809-AU)
- Core Independent Peripherals with FuSa documentation (對比ATMEGA1608-AFR)
設計說明
Decouple both VDD pins (pins 1 and 29) and the VDDIO2 pin (pin 18) with 100 nF ceramic capacitors placed within 2 mm of each pin, plus a single 4.7 uF to 10 uF bulk capacitor per supply domain. The separated VDDIO2/GNDIO2 domain lets you switch Port C levels (for example, 3.3V logic to a 5V MCU host) without perturbing the main core supply - route its return separately to avoid ground bounce coupling ADC measurements on Port A/D inputs.
Keep the 10-bit ADC analog inputs (Port A, D, F analog channels) away from the crystal traces on PF2/PF3 and high-slew digital lines. Use a dedicated analog ground island connected at one point to the digital ground. For the 20 MHz external crystal, keep the loop area small: load capacitors (typ 12-22 pF, per crystal datasheet) within 3 mm of the pins. Enable the internal BOD and CRC scan via fuse settings for noise-tolerant or safety-oriented designs.
Do not confuse the AUR (Tape & Reel) and AU (tray) suffixes when qualifying assembly lines - pick-and-place programs need the reel orientation data only for the AUR. Verify the RESET/UPDI pin configuration early: programming via single-pin UPDI frees a GPIO but requires a UPDI-capable programmer (PICkit 4, SNAP, or MegaCoreX-supported serial adapter). Also confirm 20 MHz operation is valid across your full temperature and voltage range per the datasheet frequency-vs-voltage derating curves before finalizing clocking.
When using the USART or SPI at full speed with cables longer than 30 cm, add series termination (22-47 ohm) at the driver pins to control ringing, and consider slew-rate limiting on output pins via the PORT configuration registers. The Event System and CCL route internal signals that never leave the die, so prefer CIP-based timing chains over GPIO-toggled bit-banging for critical real-time signals to eliminate software jitter.
合規資訊
RoHS compliance indicated by distributor RoHS Details (Xecor/LCSC listings). The AFR suffix variant (ATMEGA1609-AFR) is the AEC-Q100 automotive-qualified member of the same family. Request official REACH and conflict-minerals declarations from Microchip.
