ATMEGA169-16AU - 8-Bit AVR MCU 16KB Flash 16MHz TQFP-64 | Microchip
MPN： ATMEGA169-16AU ✗ 停產ATMEGA169-16AU 概覽
An 8-bit microcontroller is a complete computing system on a single chip, combining a CPU core, program memory, data memory, and peripheral functions such as timers, serial interfaces, and ADCs. The AVR ATmega family sits within Microchip's broader embedded microcontroller hierarchy, offering a modified Harvard architecture with 131 powerful instructions, most of which execute in a single clock cycle.
Key differentiating features of the ATMEGA169-16AU include its fully static operation delivering 16 MIPS throughput at 16 MHz, an on-chip LCD controller that directly drives segment and common lines for dot-less panel displays, and an 8-channel 10-bit ADC. Standard peripherals include one USART, SPI, and TWI (I2C-compatible) interfaces for external communication.
Technically, the advanced RISC architecture pairs eight general-purpose working registers with a fast ALU, allowing a single-cycle multiply instruction for efficient digital signal handling. In-System Programmable (ISP) Flash permits firmware updates without removing the device from the PCB, while JTAG boundary-scan and on-chip debugging simplify production test and development.
Typical applications include battery-operated appliances with LCD panels, such as thermostats, meters, coffee machines, and remote controls, where the integrated LCD driver reduces BOM cost by eliminating a dedicated LCD controller chip.
Design consideration: at 16 MHz the device requires a 4.5V to 5.5V supply, so battery-powered designs running below 4.5V must reduce the clock frequency accordingly.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替換替代品，適用於 ATMEGA169-16AU — 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： ATMEGA169-16AU （相同外形與佔位） — 差異在於 Package, EEPROM, Flash Memory, SRAM, Instruction Set.
ATMEGA169P-16AU
✅ 直接替換📋 參考替代品（不在目錄中）
ATMEGA329-16AU
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA649-16AU
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA165V-8AU
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA169PA-MCH
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA325-16AU
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA169-16AU 最大額定值與電氣特性
| Core Processor | AVR |
| Core Size | 8-Bit |
| Max Clock Frequency | 16 MHz |
| Flash Memory | 16 KB (8K x 16) |
| 工作溫度 | -40C to +85C |
| 封裝 | 64-TQFP (14x14 mm) |
| 安裝類型 | Surface Mount |
| 腳位數 | 64 |
| Instruction Set | 131 instructions, most single-cycle |
| Throughput | Up to 16 MIPS at 16 MHz |
| In-System Programming | Yes (ISP Flash) |
| LCD Controller | Yes (integrated segment LCD driver) |
| Programming Interfaces | ISP, JTAG |
| Series | AVR ATmega |
ATMEGA169-16AU 64-tqfp (14x14 mm) 腳位配置指南
ATMEGA169-16AU（64-tqfp (14x14 mm) 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： ATMEGA169-16AU.
請參閱 資料表 以查看完整腳位配置。
典型應用
ATMEGA169-16AU 適用於 6 應用s: LCD-Based Appliance Control, Energy and Utility Meters, Thermostats and HVAC Controllers, Handheld Measurement Instruments, Automotive Body and Comfort Electronics, Educational and Hobby Embedded Projects.
LCD-Based Appliance Control
The ATMEGA169-16AU is purpose-built for appliance front panels that need a segment LCD, a few buttons, and simple control logic in one chip. Its integrated LCD controller drives the display directly, eliminating a dedicated LCD driver IC and saving roughly $0.30-$1.00 of BOM cost per unit and PCB area. The 16KB Flash accommodates menu logic, state machines, and calibration code, while the 10-bit ADC reads temperature or level sensors. At 16 MHz with a 5V supply, response is immediate; for battery models, the AVR sleep modes allow microamp standby between button presses. Recommended companion parts include low-ESR 100nF decoupling capacitors on every VCC pin and a 16 MHz crystal with 22pF load capacitors.
推薦
Energy and Utility Meters
Electricity, water, and gas meters benefit directly from the ATMEGA169-16AU's combination of an integrated LCD driver for the tariff display and an 8-channel 10-bit ADC for analog measurement channels. The ADC digitizes shunt or divider inputs, while the AVR core executes the 16 MIPS needed for simple metering algorithms without a separate compute IC. ISP Flash permits field firmware updates through the existing SPI bus, reducing recall risk, and JTAG boundary-scan supports production test of the dense meter PCB. The -40C to +85C industrial temperature rating suits outdoor meter enclosures. Note that the 5V supply requirement at 16 MHz simplifies the mains-derived power supply design typical of panel meters.
推薦
Thermostats and HVAC Controllers
Programmable room thermostats need a readable display, keypad scanning, sensor inputs, and a control output - all of which the ATMEGA169-16AU integrates. The LCD controller renders setpoint and schedule information; GPIO lines scan a 4x4 matrix keypad; the 10-bit ADC reads an NTC thermistor for temperature feedback; and a timer output drives a relay or triac for the HVAC load. The 16 KB Flash holds schedule tables and PID control code with room to spare. AVR power-down sleep modes extend battery life in wall-battery units when the clock is lowered below 4 MHz. The industrial temperature rating covers unconditioned mounting locations such as utility rooms and attics.
推薦
Handheld Measurement Instruments
Portable test tools such as multifunction meters, cable testers, and diagnostic gauges exploit the ATMEGA169-16AU's single-chip integration. The 8-channel ADC switches between measurement inputs through a front-end multiplexer, the LCD shows readings and units, and the USART streams results to a PC or printer. The single-cycle multiply instruction accelerates calibration math and digital filtering on the AVR core, achieving real-time conversion rates at 16 MHz. Because the whole system lives in one 64-TQFP, handheld PCBs stay small and battery-frugal. Designers should budget the speed-voltage derating: at lower battery voltage, reduce the clock to maintain timing margin across the operating temperature range.
推薦
Automotive Body and Comfort Electronics
Legacy automotive comfort modules - seat controllers, mirror adjusters, and climate panels with LCD indicators - used the ATMEGA169-16AU for its industrial temperature rating of -40C to +85C and its ability to drive indicator LCDs without a companion chip. The ADC reads potentiometer position sensors on actuators, GPIO drives H-bridge inputs, and SPI links to the vehicle body controller. The 64 I/O lines handle switch matrices and lamp feedback in a single MCU. For new automotive designs, select the ATMEGA169PA (active status) or an AEC-Q100-qualified AVR, since the original ATMEGA169-16AU is obsolete and not automotive-qualified. JTAG boundary scan simplifies production ICT of the module PCB.
推薦
Educational and Hobby Embedded Projects
The ATmega169 family is popular in education and hobby projects - it was famously the MCU of the AVR Butterfly demonstration board, combining LCD, joystick, light sensor, and EEPROM in one self-contained platform. The AVR instruction set is widely taught, and open toolchains including AVR-GCC, avrdude, and the MegaCore Arduino hardware package explicitly support ATmega169. ISP programming requires only a low-cost programmer connected to the SPI header. Students benefit from datasheet-level access to the LCD, ADC, and TWI peripherals. For lab stock, ATMEGA329-16AU is a wise substitute since it uses the identical 64-TQFP footprint and toolchain while doubling available Flash for larger class projects.
推薦
推薦產品摘要
工程參考資料，適用於 ATMEGA169-16AU — 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 | ATMEGA169P-16AU | ATMEGA329-16AU | ATMEGA649-16AU | ATMEGA165V-8AU |
|---|---|---|---|---|---|
| Package | 64-TQFP (14x14 mm) | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same |
| Brand | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) |
| Flash Memory | 16 KB (8K x 16) | 16 KB | 32 KB | 64 KB | 16 KB |
| Max Clock Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 8 MHz |
| LCD Controller | Yes (integrated) | Yes (integrated) | Yes (integrated) | Yes (integrated) | No |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Pin-to-Pin Compatibility | Reference | 100% pin-to-pin | Pin-to-pin (same footprint family) | Pin-to-pin (same footprint family) | Pin-to-pin (no LCD function on shared pins) |
主要差異化特點
- Integrated segment LCD controller (對比ATMEGA165V-8AU)
- Full 16 MHz throughput (對比ATMEGA165V-8AU)
- 16KB Flash in the 64-pin LCD-AVR footprint (對比ATMEGA329-16AU)
- Errata status trade-off (對比ATMEGA169P-16AU)
設計說明
The 16 MHz speed grade requires the high end of the AVR supply range per the Atmel datasheet speed-versus-voltage curves - approximately 4.5V to 5.5V for full-speed operation. Estimated: if your system runs at 3.3V, maximum safe clock is reduced substantially; either add a 5V regulator (e.g., a 7805-class LDO with adequate thermal margin) or derate the crystal to a speed grade valid at 3.3V. Decouple every VCC pin of the 64-TQFP with 100nF ceramics placed within 2mm of the pin, plus one 10uF bulk capacitor near the regulator output.
For the 64-TQFP (14x14 mm), route the JTAG (TCK/TMS/TDO/TDI) header to a standard 2x5 2.54mm connector even if unused - it enables boundary-scan production test and on-chip debug later. Keep the ISP header (MOSI, MISO, SCK, RESET, VCC, GND) on the same connector footprint many AVR boards standardize on. The LCD segment lines carry small AC signals; keep them short and away from the crystal traces to prevent ghost segments. Use a ground plane under the crystal with 22pF load capacitors for the 16 MHz oscillator.
Fusing RESET into an I/O, disabling SPIEN, or disabling JTAG can lock the device out of ISP and JTAG programming, requiring a 12V high-voltage parallel programmer (STK500 or equivalent) for recovery - double-check fuse settings before flashing. Second pitfall: the ATMEGA169-16AU is obsolete; when switching to ATMEGA169P or ATMEGA329, the device signature differs, so update the programmer device selection and recompile firmware. Third: ATMEGA165 variants lack the LCD controller - do not substitute it into LCD-based designs without adding an external driver.
合規資訊
The -AU suffix historically denotes RoHS/lead-free TQFP packaging in Atmel nomenclature, but formal RoHS/REACH declarations were not present in the retrieved web data; obtain the certificate of conformance from the seller. Not AEC-Q100 qualified for automotive designs.