ATMEGA169V-8MI - 8MHz AVR MCU 16KB Flash 64-QFN | Microchip
MPN： ATMEGA169V-8MI ✓ 啟用中ATMEGA169V-8MI 概覽
A microcontroller (MCU) is a single-chip computer that integrates a processor core, memory, and programmable peripherals on one die. The ATmega169V belongs to the AVR ATmega family of 8-bit microcontrollers, which sits within Microchip's broader embedded processor portfolio. AVR cores execute most instructions in a single clock cycle, and this device achieves up to 8 MIPS throughput at 8MHz thanks to its advanced RISC architecture with 131 instructions and 32 general-purpose working registers.
Key features include 16KB self-programming Flash with 10,000 write-cycle endurance, an 8-channel 10-bit ADC for analog signal acquisition, a JTAG interface for on-chip debugging and boundary scan, and connectivity via SPI and USART plus the Universal Serial Interface (USI). The device also integrates a real-time counter with separate oscillator, four timers (two 8-bit, one 16-bit plus RTC), analog comparator, and brown-out detection for supply-glitch resilience.
Architecturally, the AVR uses a Harvard structure with separate program and data buses, allowing Flash fetches and SRAM access in parallel. In-system programmability permits firmware updates after assembly, while the JTAG debug system enables breakpoint and single-step debugging without external emulators. Power management modes include idle, ADC noise reduction, power-save, and power-down for microamp-level sleep currents, which is why the V-variant is popular in coin-cell and battery instruments.
Typical applications include LCD-based handheld meters, industrial sensor nodes, HVAC control boards, and battery-powered instrumentation where 2.7V operation and low sleep current are essential.
When designing, decouple both VCC pairs with 100nF ceramics placed close to the 9x9 QFN power pins, and use the exposed pad as a solid ground connection; do not leave VAGND floating or ADC accuracy will degrade.
This page synthesizes distributor availability, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替換替代品，適用於 ATMEGA169V-8MI — 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。
ATMEGA169PV-8MUR
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ATMEGA169P-15MT
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ATMEGA169A-15MT
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ATMEGA169V-8MUR
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ATMEGA169V-8MI 最大額定值與電氣特性
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 8 MHz |
| Flash Program Memory | 16 KB (8K x 16) |
| SRAM | 1 KB |
| EEPROM | 512 B |
| Supply Voltage Range | 2.7 V to 5.5 V |
| ADC Channels | 8 |
| ADC Resolution | 10-bit |
| Communication Interfaces | SPI, USART, USI |
| JTAG | Yes (on-chip debug and boundary scan) |
| Timers | Two 8-bit, one 16-bit, RTC |
| 封裝 | 64-VFQFN (9x9 mm) Exposed Pad |
| 安裝類型 | Surface Mount |
| 工作溫度 | -40C to +85C (I grade) |
| Throughput | Up to 8 MIPS at 8 MHz |
| Instruction Set | 131 instructions, mostly single-cycle |
| Brown-out Detector | Yes |
ATMEGA169V-8MI 64-vfqfn (9x9 mm) exposed pad 腳位配置指南
ATMEGA169V-8MI（64-vfqfn (9x9 mm) exposed pad 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： ATMEGA169V-8MI.
請參閱 資料表 以查看完整腳位配置。
典型應用
ATMEGA169V-8MI 適用於 6 應用s: Handheld LCD Instruments, Battery-Powered Sensor Nodes, Industrial Control Panels, HVAC and Thermostat Controls, Automotive-Adjacent Body Modules (non-safety), Test Fixtures and Programmers.
Handheld LCD Instruments
The ATMEGA169V-8MI fits handheld meters and panel instruments because its 64-pin die integrates an on-chip LCD segment controller alongside the AVR core, eliminating an external LCD driver IC. The 2.7V to 5.5V supply range lets the MCU run directly from two alkaline cells, and the 8MHz V-grade speed rating is sufficient for menu handling, button scanning, and display refresh. Its power-down and power-save sleep modes drop consumption to microamp levels between measurements, while the RTC timer with 32kHz crystal keeps timekeeping alive in sleep. The 10-bit ADC reads thermistors or bridge sensors, and 512B EEPROM stores calibration constants across battery changes.
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Battery-Powered Sensor Nodes
For distributed sensor nodes, the ATMEGA169V-8MI combines an 8-channel 10-bit ADC with deep sleep modes, allowing periodic sampling of analog sensors from a coin cell or lithium pack. The node wakes on timer or comparator interrupt, converts, transmits over USART or SPI to a radio module, and returns to power-down. Running at 8MHz on 3.3V keeps active current low, and brown-out detection prevents corrupt EEPROM writes during battery sag. The 16KB Flash holds protocol stacks for simple sub-GHz or wired links, while 1KB SRAM buffers packet payloads. JTAG on-chip debugging accelerates firmware bring-up in low-power duty-cycle tuning.
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Industrial Control Panels
In factory panels, the ATMEGA169V-8MI operates across the -40C to +85C industrial range with 5V logic compatible with legacy PLC I/O. Its USART talks to operator terminals, SPI drives isolated gate drivers or relay latches, and the analog comparator plus 10-bit ADC monitors current and supply rails for fault detection. Brown-out detection and a watchdog timer enforce deterministic restarts after line disturbances. The 64-pin 9x9 QFN footprint keeps board area compact in DIN-rail modules, and the exposed pad ties the die ground to the PCB plane for noise immunity in electrically harsh cabinets with contactors and switching loads nearby.
推薦
HVAC and Thermostat Controls
Thermostats benefit directly from the ATMEGA169V-8MI's integrated LCD controller for temperature setpoint display, its EEPROM for user settings retention, and its asynchronous RTC timer clocked from a 32kHz crystal for accurate scheduling during power-save sleep. The 10-bit ADC digitizes NTC temperature sensors and battery-voltage dividers, while the USI or SPI interfaces gas sensors or rotary encoders. Operating down to 2.7V allows use of two-cell battery supplies without a boost converter, and the 8MHz internal option removes the need for a crystal in cost-optimized wall units. JTAG debugging simplifies PID tuning during development.
推薦
Automotive-Adjacent Body Modules (non-safety)
Although the -8MI is not AEC-Q100 qualified, 12V-tolerant 5V AVR designs commonly serve auxiliary vehicle modules such as button clusters and simple indicator controllers. The ATMEGA169V-8MI's -40C floor suits under-dash environments, its brown-out detector rides crank transients, and the LCD controller can drive simple gauge segments. Designers should add a 5V load-dump-protected regulator upstream and TVS protection on I/O. The USART supports LIN-style messaging through an external transceiver, and the 16KB Flash accommodates state machines plus diagnostic handlers. For safety-relevant or engine-bay positions, select a formally AEC-Q100-qualified MCU instead.
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Test Fixtures and Programmers
Bench fixtures use the ATMEGA169V-8MI as a low-cost controller because JTAG boundary scan supports board-level continuity checks, while the SPI/USART ports program and test target devices. The 8MHz clock provides deterministic timing for stimulus generation, and the 10-bit ADC measures analog thresholds such as button resistance or LED forward voltage. The 64-pin QFN's generous peripheral pin multiplexing exposes enough general-purpose I/O to drive relays and read pass/fail inputs simultaneously. Self-programming Flash lets the fixture update its own test scripts from a host over UART, reducing rework when test limits change between product revisions.
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推薦產品摘要
工程參考資料，適用於 ATMEGA169V-8MI — 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 | ATMEGA169PV-8MUR | ATMEGA169P-15MT | ATMEGA169A-15MT | ATMEGA168PA-MU |
|---|---|---|---|---|---|
| Package | 64-VQFN (9x9) Exposed Pad | 64-VQFN (9x9) - same | 64-VQFN (9x9) - same | 64-VQFN (9x9) - same | 32-QFN (5x5) - different, not drop-in |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Clock Speed | 8 MHz | 8 MHz | 16 MHz | 16 MHz | 20 MHz |
| Flash Memory | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| On-chip LCD Controller | Yes | Yes | Yes | Yes | No |
| Sleep Current (picoPower) | Standard AVR sleep | Lower (picoPower die) | Standard | Standard | Lower (picoPower die) |
主要差異化特點
- Integrated LCD segment controller (對比ATMEGA168PA-MU)
- 64-pin QFN peripheral density (對比ATMEGA169PV-8MUR)
- Lower-voltage 8MHz operation (對比ATMEGA169P-15MT)
設計說明
The 64-QFN (9x9 mm) exposed pad must be soldered to a ground island with an array of thermal vias; the exposed pad is the primary ground connection for the die and is not optional. Place 100nF ceramic decoupling capacitors within 2 mm of both VCC pin groups, one 10uF bulk capacitor per supply rail, and a separate RC filter on AVCC (10 ohm series plus 100nF) when using the 10-bit ADC for better than 8 effective bits.
At 5V and 8MHz the active supply current is in the milliamp range, but the value of this V-grade part is its sleep behavior: use power-save mode with the asynchronous RTC timer for periodic wake, and disable the analog comparator and unused peripherals via the power reduction registers before entering sleep. Estimated: a sensor node waking once per second for a 2 ms task at 3 mA active and 5 uA sleep averages roughly 11 uA, enabling multi-year life on a 1000 mAh cell.
Do not assume all ordering suffixes are interchangeable: -8MI (MLF, industrial) versus -8AI (TQFP) differ in package and footprint, and 64-QFN land patterns do not accept TQFP parts. Verify the speed-versus-voltage curve before clocking 8MHz below 3V, use 1.8V to VCC logic levels on JTAG when interfacing to 3.3V debuggers, and program the OCDEN fuse state deliberately since leaving on-chip debug enabled degrades Flash endurance in production units.
合規資訊
Distributor listings (DigiKey, Hotenda) describe the part as lead-free RoHS-compliant. This is a commercial/industrial AVR, not AEC-Q100 qualified. REACH, halogen-free, and conflict-minerals status must be confirmed via Microchip's official environmental compliance documentation.
