ATMEGA169PA-MN - 16MHz AVR MCU 16KB Flash QFN-64 | Microchip
料号： ATMEGA169PA-MN ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.16 | $4.16 |
| 10 | $3.95 | $39.50 |
| 100 | $3.62 | $362.00 |
| 500 | $3.32 | $1,660.00 |
| 1,000 | $3.05 | $3,050.00 |
ATMEGA169PA-MN 概述
A microcontroller unit (MCU) integrates a processor core, program memory, data memory, and peripherals onto a single chip, forming the lowest layer of the embedded-system hierarchy: transistor -> logic IC -> microcontroller -> embedded system. The AVR architecture uses a Harvard memory structure, where the 130-instruction RISC core fetches instructions most often in a single clock cycle, and 32 general-purpose working registers are directly connected to the ALU for high code density and fast execution.
Key features include in-system self-programmable Flash with read-while-write capability, the picoPower technology suite (idle, power-down, power-save, and standby sleep modes plus an ultra-low-power internal RC oscillator) for battery-powered designs, an on-chip LCD controller driving up to 4 COM x 25 SEG lines with contrast control, a 10-bit ADC, USI and USART serial interfaces, and SPI for ISP programming. The A-suffix silicon is Microchip's revised picoPower generation, functionally drop-in compatible with the earlier ATmega169P per Microchip application note AVR529.
Technically, the device operates from 1.8 V to 5.5 V across an industrial -40C to +105C temperature range, with an internal calibrated RC oscillator supporting clock rates up to 16 MHz, reducing BOM cost by removing an external crystal in many designs.
Typical applications include LCD-based utility metering, battery-powered handheld instrumentation, consumer appliance panels with segmented displays, and industrial sensor nodes where low sleep-mode current and integrated LCD drive are decisive.
Design consideration: with 54 GPIO in a 9x9 mm QFN, the exposed pad must be soldered to a grounded array of vias to ensure both thermal relief and signal-integrity for the 16 MHz internal clock domain.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： ATMEGA169PA-MN ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ATMEGA169PA-MN （相同外形与封装尺寸） ——差异在于 Package, Instruction Set, Core Architecture, Debug Interface, Packaging.
快速对比工具——选择替代料号进行并排对比：
ATMEGA165PA-MN
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.75 / 个
查看数据手册 →ATMEGA169PA-MNR
✅ 直接替换✓ 有现货
$1.8 / 个
查看数据手册 →ATMEGA329P-MN
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATMEGA649P-MU
✅ 直接替换✓ 有现货
$3.91 / 个
查看数据手册 →ATMEGA169P-15AT
✅ 直接替换✓ 有现货
$3.6 / 个
查看数据手册 →ATMEGA169PA-MN 最大额定值与电气特性
| Core Architecture | 8-bit AVR RISC |
| Core Size | 8-bit |
| 最大时钟频率 | 16 MHz |
| Program Memory Size | 16 KB (8K x 16) |
| Program Memory Type | ISP Flash (read-while-write) |
| EEPROM Size | 512 B |
| RAM Size | 1 KB (1K x 8) |
| Number of I/O | 54 |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Oscillator Type | Internal |
| Instruction Set | 130 powerful instructions, most single-cycle |
| Working Registers | 32 general purpose |
| LCD Controller | Up to 4 COM x 25 SEG |
| 工作温度 | -40C to +105C |
| 封装 / 外壳 | 64-QFN (9x9 mm) MLF, exposed pad |
| 安装方式 | Surface Mount |
| Packaging | Tray |
| Series | AVR ATmega picoPower |
ATMEGA169PA-MN 64-qfn (9x9 mm) mlf, exposed pad 引脚配置指南
ATMEGA169PA-MN（64-qfn (9x9 mm) mlf, exposed pad 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： ATMEGA169PA-MN.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATMEGA169PA-MN 适用于 6 应用s: LCD Utility Metering, Battery-Powered Handheld Instruments, Appliance and Consumer Control Panels, Industrial Sensor Nodes, Security and Access Control Panels, IoT End Nodes with Segment Displays.
LCD Utility Metering
Electricity, water, and gas meters need a segmented LCD, nonvolatile storage for billing data, and years of battery or mains-derived operation. The ATMEGA169PA-MN fits this application directly: its on-chip LCD controller drives up to 4 COM x 25 SEG lines, eliminating an external LCD driver and its I2C/SPI overhead, while the 512 B EEPROM retains tariff and consumption records through power loss. The picoPower power-save mode keeps an asynchronous timer alive at microamp-level current for time-of-use metering, and the 1.8 V to 5.5 V supply range tolerates battery droop. The 10-bit ADC supports analog front-end sampling of shunt or divider signals at low duty cycle, keeping average consumption low.
推荐
Battery-Powered Handheld Instruments
Portable measurement tools demand long run time, a readable display, and robust I/O. The ATMEGA169PA-MN addresses all three: picoPower sleep modes (idle, power-down, power-save) cut standby drain to microamp levels, the integrated LCD controller renders measurement results on segmented glass, and 54 GPIO lines interface keys, relays, and sensors without port expanders. Its 1.8 V minimum supply allows the device to run directly from two alkaline cells as they discharge to end-of-life, and the internal 16 MHz oscillator removes crystal cost while providing adequate timing accuracy for general instrumentation. The -40C to +105C rating survives workshop and field temperature extremes.
推荐
Appliance and Consumer Control Panels
White-goods and consumer appliance panels combine a segmented display, tactile keys, and relay or triac drive. The ATMEGA169PA-MN integrates the display drive (4 COM x 25 SEG), a USART for module communication, and a USI for configuration buses, all in one 9x9 mm QFN that fits behind a standard LCD glass. The 16 KB Flash typically holds a full menu-driven state machine with multiple languages, and the 1 KB SRAM handles display buffering. The industrial 105C grade suits oven-adjacent or compressor-compartment mounting positions where consumer-grade parts (70C/85C) would derate.
推荐
Industrial Sensor Nodes
Distributed sensor nodes on a factory floor must acquire analog signals, condition them, and report over a serial link while surviving harsh temperatures. The ATMEGA169PA-MN provides a 10-bit ADC referenced to AVCC/AREF, a hardware USART for RS-485 front-ends, and 54 GPIO for digital status and control, all rated to +105C. PicoPower design keeps the node responsive to wake events while averaging low current in polled networks. The internal oscillator is sufficient for asynchronous serial links, and the exposed-pad QFN gives good thermal coupling to the PCB ground plane in enclosed, non-fan-cooled enclosures.
推荐
Security and Access Control Panels
Keypad-based access panels and small alarm controllers benefit from the ATMEGA169PA-MN's combination of many GPIO (54 lines for key matrices, readers, and zone loops), EEPROM for credential and configuration storage, and a display for status prompts. The power-save sleep mode with pin-change interrupt allows the panel to idle at low current between events, important for panels backed by battery during mains failure. The 16 MHz internal clock provides headroom for checksum and code-comparison routines, and the -40C to +105C rating supports outdoor gate and cabinet installations.
推荐
IoT End Nodes with Segment Displays
Low-cost IoT endpoints that show status on a segmented display (thermostats, smart plugs with indicators, sensor gateways) can use the ATMEGA169PA-MN as the local controller paired with a wireless module. The AVR handles the LCD, user interface, and sensor polling in picoPower sleep between events, while a separate radio module handles connectivity via USART or SPI. The 1.8 V to 5.5 V range matches single-cell-boosted or coin-cell-derived rails, and the 512 B EEPROM stores calibration and network parameters across firmware updates. At roughly $4.16 per unit (as of 2026-09-16), it keeps the node BOM lean.
推荐
推荐产品汇总
工程参考数据： ATMEGA169PA-MN ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ATMEGA165PA-MN | ATMEGA169PA-MNR | ATMEGA329P-MN | ATMEGA649P-MU |
|---|---|---|---|---|---|
| Package | 64-QFN (9x9) MLF | 64-QFN (9x9) MLF - same | 64-QFN (9x9) MLF - same | 64-QFN (9x9) MLF - same | 64-QFN (9x9) MLF - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 16 KB | 8 KB | 16 KB | 32 KB | 64 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 2 KB | 4 KB |
| EEPROM | 512 B | 512 B | 512 B | 1 KB | 2 KB |
| Max Clock Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz |
| LCD Controller | 4 COM x 25 SEG | 4 COM x 25 SEG | 4 COM x 25 SEG | 4 COM x 25 SEG | Up to 4 COM x 40 SEG |
| picoPower Silicon | Yes (PA revision) | Yes | Yes | Yes | Yes |
| Operating Temperature | -40C to +105C | -40C to +85C | -40C to +105C | -40C to +85C | -40C to +85C |
关键差异点
- Integrated LCD controller eliminates external display driver （对比 ATMEGA168PA-MU)
- Industrial 105C temperature grade （对比 ATMEGA165PA-MN)
- picoPower silicon revision with drop-in migration path （对比 ATMEGA169P-15AT)
设计说明
The 64-QFN (9x9 mm) MLF package has an exposed center pad that is electrically and thermally significant. Solder it to a ground island connected to the PCB ground plane through an array of 5x5 (or denser) thermal vias of 0.3 mm diameter, filled or plugged per assembly house capability. Poor exposed-pad soldering is the most common cause of intermittent ground bounce and elevated junction temperature on QFN AVRs, and it also complicates rework - inspect with X-ray on first-article builds.
Decouple VCC and AVCC independently: place a 100 nF ceramic capacitor within 2 mm of each VCC pin pair and at AVCC, plus a bulk 4.7 uF to 10 uF near the part. Connect AVCC to VCC through an LC filter (ferrite bead + 100 nF) when the ADC is used, and tie AREF to ground through a 100 nF capacitor as recommended in the Microchip datasheet supply-section guidance. Never leave AVCC unconnected even if the ADC is unused - the part will not power up correctly.
The internal RC oscillator is factory-calibrated but its tolerance is wider than a crystal; if your application uses the USART at high baud rates or the LCD controller, verify timing margins or enable crystal operation for critical links. When migrating from ATmega169P to the PA device, note that per application note AVR529 the migration is drop-in, but re-verify any firmware that reads calibration bytes or relies on exact sleep-current figures, as the PA silicon improves power figures and re-issues calibration constants.
合规信息
FindIC listing describes the part as 'Green, MLF' per Microchip's green/lead-free classification. Confirm REACH and conflict-minerals declarations via Microchip's official compliance portal.
