ATMEGA169PA-MU - 8-bit AVR MCU 16KB Flash 64-QFN | Microchip
料号： ATMEGA169PA-MU ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $5.41 | $5.41 |
| 10 | $4.95 | $49.50 |
| 100 | $4.6 | $460.00 |
| 500 | $4.35 | $2,175.00 |
| 1,000 | $4.1 | $4,100.00 |
ATMEGA169PA-MU 概述
An 8-bit AVR ATmega microcontroller is a Harvard-architecture RISC processor in the broader microcontroller (MCU) hierarchy: microcontroller -> embedded processor -> semiconductor IC. MCUs integrate CPU, program memory, data memory, timers, and serial peripherals on a single die, making them the backbone of cost-sensitive embedded control systems where a separate processor and memory would add cost, board area, and power consumption.
Key features include the advanced AVR RISC architecture with 133 powerful instructions, most executing in a single clock cycle, plus 32 general purpose working registers that are directly connected to the ALU for maximum throughput of up to 16 MIPS at 16 MHz. The picoPower technology delivers industry-leading low power consumption across all sleep modes, critical for battery-powered designs. On-chip JTAG interface enables boundary-scan, in-system debugging, and programming, while ISP (in-system programmable) FLASH with read-while-write capability simplifies firmware updates in the field.
The 'PA' suffix identifies the picoPower die revision that is a functionally identical, drop-in replacement for the earlier ATmega169P, produced under the same qualification process and production tests per Microchip application note AVR529. Core operating voltage spans 1.8 V to 5.5 V (per family data), permitting operation from 2x AA cells to 5 V industrial rails.
Typical applications include LCD-based consumer appliances, battery-operated metering, industrial control panels, and hand-held instrumentation where the integrated LCD controller and low active current extend battery life.
When designing with this device, reserve JTAG pins or disable JTAG via fuse to free port pins, and apply decoupling capacitors of 0.1 uF per supply pin close to the exposed pad for supply integrity.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not consolidated in the manufacturer datasheet.
直接替换替代料： ATMEGA169PA-MU ——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-MU （相同外形与封装尺寸） ——差异在于 Package, Supply Voltage Range, Operating Temperature, Program Memory Size, Program Memory Type.
快速对比工具——选择替代料号进行并排对比：
ATMEGA169A-MU
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATMEGA329PA-MU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$5.18 / 个
查看数据手册 →ATMEGA329A-MU
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATMEGA649PA-MU
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATMEGA649A-MU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$4.42 / 个
查看数据手册 →ATMEGA169PA-MU 最大额定值与电气特性
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 16 MHz |
| Program Memory Type | FLASH |
| Program Memory Size | 16 KB (8K x 16) |
| EEPROM Size | 512 B |
| RAM Size | 1 KB |
| Number of I/O | 54/69 |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Architecture | Advanced RISC, 133 instructions, most single-cycle |
| Working Registers | 32 x 8-bit general purpose |
| Performance | Up to 16 MIPS at 16 MHz |
| Debug/Programming | JTAG (IEEE 1149.1), ISP, IAP |
| Low Power Technology | picoPower |
| 封装 | 64-QFN (9x9 mm) with exposed pad |
| 安装类型 | Surface Mount |
| 生命周期状态 | Active |
| Series | AVR ATmega |
ATMEGA169PA-MU 64-qfn (9x9 mm) with exposed pad 引脚配置指南
ATMEGA169PA-MU（64-qfn (9x9 mm) with 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-MU.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATMEGA169PA-MU 适用于 6 应用s: LCD-Based Consumer Appliances, Battery-Powered Metering and Instrumentation, Industrial Control Panels, Hand-Held Remote Controls, Embedded System Prototyping and Education, Sensor Nodes and IoT Front-Ends.
LCD-Based Consumer Appliances
The ATMEGA169PA-MU is a natural fit for appliances with segmented LCD displays because the ATmega169 family integrates an on-chip LCD controller that drives the panel directly from GPIO-multiplexed pins - no external LCD driver IC is required, reducing BOM cost and board area. With 54/69 GPIO lines, one device can simultaneously drive a multi-segment LCD, scan a keypad, and control relays or buzzers. The picoPower die keeps standby current low so the appliance meets standby-power regulations, and operation from 1.8 V to 5.5 V allows direct battery or rectified-mains-derived supply rails. Firmware is updated in the field via ISP with read-while-write FLASH, so feature updates do not require re-flashing at a service bench.
推荐
Battery-Powered Metering and Instrumentation
Battery-powered utility meters and hand-held instruments benefit from the ATMEGA169PA-MU picoPower architecture: all sleep modes are optimized for microamp-level standby current, and the 1.8 V rail floor lets the design run from two alkaline cells across their full discharge curve. The integrated LCD controller renders measurement readouts without a separate driver, and the 10-bit ADC of the ATmega family handles sensor inputs such as shunt voltage or temperature bridges. With 16 MIPS available at 16 MHz, DSP-style averaging and calibration routines complete quickly, allowing the core to return to sleep within milliseconds. Field firmware updates over JTAG or ISP enable meter recalibration and tariff changes without opening sealed enclosures, lowering total cost of ownership for utility deployments.
推荐
Industrial Control Panels
In industrial control panels, the ATMEGA169PA-MU provides 54/69 GPIO - enough to drive status indicators, optocoupled inputs, and relay outputs from a single controller, replacing glue logic and reducing PCB layers. The 5.5 V supply ceiling permits direct operation from legacy 5 V industrial logic rails, and the AVR core with 133 single-cycle instructions executes deterministic control loops suitable for PLC-lite sequencing tasks. The JTAG boundary-scan capability supports production-line board test per IEEE 1149.1, catching solder defects before power-up, while the industrial 64-QFN exposed-pad package improves thermal and ground integrity on vibration-prone panels. The active lifecycle status and same-family pin-compatible upgrade path (ATmega329/649) protect the design against memory-driven obsolescence over the panel's long service life.
推荐
Hand-Held Remote Controls
Remote controls and hand-held transmitters leverage the ATMEGA169PA-MU's balance of LCD drive, keypad scanning, and ultra-low sleep current. A single device can drive the segmented display showing device status, scan a 4x8 key matrix using remaining port pins, and modulate IR or RF transmit stages, all within 16 KB of FLASH - ample for encoding schemes and multi-protocol support. PicoPower sleep modes keep quiescent draw negligible between key presses, maximizing coin-cell service life, while wake-on-pin-change interrupt logic responds instantly to user input. The 64-QFN (9x9 mm) package with exposed pad gives a compact 81 mm2 footprint suited to slim ergonomic enclosures, and the wide 1.8 V to 5.5 V supply range accommodates both lithium coin cells and AAA battery packs without a regulator.
推荐
Embedded System Prototyping and Education
The ATMEGA169PA-MU is well suited to embedded systems education and prototyping because the AVR ATmega architecture is documented exhaustively in Microchip datasheets and application notes, and it is programmable with free toolchains including AVR-GCC, avrdude, and Microchip Studio. The JTAG interface allows single-step source-level debugging on inexpensive hardware, teaching real embedded workflows rather than simulator-only methods. Students learn ISP boot loader design using the read-while-write FLASH capability, timer/PWM peripherals, and the on-chip LCD controller for display projects. The 64-QFN exposed-pad package, while requiring care in hand assembly, teaches professional reflow techniques. Because the whole ATmega169/329/649 family shares one datasheet and pinout, course material scales directly from the 16 KB device to the 64 KB ATmega649PA as projects grow in complexity.
推荐
Sensor Nodes and IoT Front-Ends
In battery-powered sensor nodes and wired IoT front-ends, the ATMEGA169PA-MU collects ADC sensor data, formats it, and hands it off to a radio or bus transceiver over SPI, TWI (I2C), or USART, all of which are on-chip. PicoPower sleep modes let the node spend most of its life in power-down with only a watchdog or pin-change interrupt active, waking at 16 MIPS to sample, process, and transmit in milliseconds - a duty-cycle pattern that stretches battery life to years. The 1 KB SRAM handles protocol buffers for the ATmega class of deployments, and the 512 B EEPROM stores calibration coefficients and network addresses across power cycles. The exposed-pad QFN package aids thermal dissipation in sealed outdoor enclosures, and the pin-compatible ATmega329PA/649PA upgrades provide growth headroom without PCB respins.
推荐
推荐产品汇总
工程参考数据： ATMEGA169PA-MU ——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 | ATMEGA169A-MU | ATMEGA329PA-MU | ATMEGA649PA-MU |
|---|---|---|---|---|
| Package | 64-QFN (9x9 mm) exposed pad | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same |
| Brand | Microchip Technology (Atmel) | Microchip Technology | Microchip Technology | Microchip Technology |
| Program FLASH | 16 KB (8K x 16) | 16 KB | 32 KB | 64 KB |
| SRAM | 1 KB | 1 KB | 2 KB | 4 KB |
| EEPROM | 512 B | 512 B | 1 KB | 2 KB |
| Max Clock Speed | 16 MHz (16 MIPS) | 16 MHz | 16 MHz | 16 MHz |
| picoPower Low-Power Die | Yes (PA) | No (A die) | Yes (PA) | Yes (PA) |
| 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 |
关键差异点
- Integrated LCD controller （对比 ATMEGA168PA-MU)
- Highest GPIO count in small AVR family tier （对比 ATMEGA168PA-MU)
- picoPower die with drop-in family upgrade path （对比 ATMEGA169A-MU)
设计说明
The 64-QFN (9x9) MLF package has its ground pad on the underside, which must be soldered to a grounded copper pour with an array of thermal vias (typically 5x5 grid of 0.3 mm vias). This pad is the primary ground return for the die - treating it as cosmetic will cause erratic resets and analog noise. Place one 100 nF ceramic decoupling capacitor at each supply pin pair (VCC/AVCC/AREF) within 2 mm of the pin, plus a 10 uF bulk capacitor. Keep the ADC reference (AVCC) filtered with an RC network if analog accuracy matters.
The JTAG pins (TCK, TMS, TDI, TDO) are fused-on at reset and override port functions on PC2-PC5. If your application needs those four port pins as GPIO, you must clear the JTAGEN fuse - do this before assuming 69 usable I/O lines. Also note the speed-versus-voltage derating: below 5 V the maximum guaranteed clock frequency decreases, so a 16 MHz crystal design must not be run at 1.8 V. Finally, PA and non-PA (A) dies are firmware-compatible, but verify sleep-current targets only against PA datasheet tables.
For battery designs, exploit the picoPower sleep modes: power-down with watchdog active achieves microamp-level current, and pin-change interrupts or the asynchronous timer wake the core. Estimated: a node sleeping 99.9% of the time at a few microamps and active 0.1% at ~10 mA averages roughly 13 uA, yielding multi-year life from a 1000 mAh cell. Route brown-out detector enabled via fuse to prevent EEPROM corruption during battery collapse, and sequence AVR reset with peripheral power rails using a supervisor if mixed-supply ICs share the bus.
When using the integrated LCD controller, keep LCD segment/backplane traces away from crystal and analog traces; the LCD drive waveforms are square-edged and couple capacitively. Use the internal RC oscillator for non-timing-critical firmware to free the crystal pins for GPIO, but switch to an external crystal when USART baud rates or precise timekeeping matter. For JTAG in-circuit debugging during development, provide a standard 10-pin JTAG header on the first prototype even if production boards disable JTAG via fuse.
合规信息
Compliance status was not explicitly stated in the verified web data retrieved; consult the Microchip product page environmental datasheet for RoHS/REACH confirmation.
