ATMEGA164PA-ANR - 8-bit AVR MCU, 16KB Flash, 20MHz | Microchip
料号： ATMEGA164PA-ANR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.64 | $1.64 |
| 10 | $1.52 | $15.20 |
| 100 | $1.38 | $138.00 |
| 500 | $1.24 | $620.00 |
| 1,000 | $1.1 | $1,100.00 |
ATMEGA164PA-ANR 概述
A microcontroller unit (MCU) integrates a processor core, memory, and peripherals on a single silicon die, forming the lowest layer of the embedded-system hierarchy (MCU -> embedded processor -> semiconductor). The AVR architecture executes most instructions in a single clock cycle, delivering throughput approaching 1 MIPS per MHz, which lets system designers trade processing speed directly against power consumption.
Key features include 32 general purpose I/O lines, 32 general purpose working registers, an real-time counter, three flexible timer/counters with compare modes and PWM outputs, two USARTs, a byte-oriented Two-Wire serial interface (TWI/I2C), and an 8-channel 10-bit ADC. The picoPower technology family supports multiple sleep modes for battery-powered designs operating from 1.8V to 5.5V.
Technical depth: the AVR enhanced RISC core pairs 135 instructions with the 32-register file, giving fast context switching and high code density. In-System Programming (ISP) with read-while-write flash allows firmware updates without removing the device, and debugWIRE in-circuit debugging is accessed through the reset line.
Typical applications include industrial automation and sensor nodes, consumer appliances and HVAC control, and battery-powered metering where the picoPower sleep modes minimize average current draw.
Design consideration: decouple all VCC and AVCC pins with 0.1 uF ceramics and keep the ADC analog supply separate from digital switching noise to preserve 10-bit ADC accuracy.
This page synthesizes distributor pricing as of 2026-09-16, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： ATMEGA164PA-ANR ——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： ATMEGA164PA-ANR （相同外形与封装尺寸） ——差异在于 Package, ADC, EEPROM, SRAM, Timers/Counters.
快速对比工具——选择替代料号进行并排对比：
ATMEGA164A-AU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.65 / 个
查看数据手册 →ATMEGA324PA-AU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.87 / 个
查看数据手册 →ATMEGA644PA-AU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$4.61 / 个
查看数据手册 →ATMEGA1284P-AU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$4.65 / 个
查看数据手册 →ATMEGA16-16AU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$4.41 / 个
查看数据手册 →ATMEGA1284-AUR
✅ 直接替换✓ 有现货
$4.61 / 个
查看数据手册 →ATMEGA164PA-ANR 最大额定值与电气特性
| Core | AVR 8-bit RISC |
| Flash Memory | 16 KB (8K x 16) ISP, read-while-write |
| EEPROM | 512 B |
| SRAM | 1 KB |
| 最大时钟频率 | 20 MHz |
| Supply Voltage Range | 1.8 V to 5.5 V |
| I/O Count | 32 general purpose I/O lines |
| Timers/Counters | 3 flexible timer/counters with compare modes and PWM |
| USART | 2 |
| Serial Interfaces | Two-Wire serial interface (TWI/I2C), SPI, 2x USART |
| ADC | 8-channel 10-bit |
| MIPS per MHz | Approaching 1 MIPS/MHz (single-cycle execution) |
| Low Power Technology | picoPower with multiple sleep modes and real-time counter |
| Programming/Debug | In-System Programming (ISP), debugWIRE via reset line |
| 封装 | 44-TQFP (10x10 mm) |
| 安装类型 | Surface Mount |
| Packing | Tape and Reel (T/R) |
| RoHS 状态 | Compliant (GRN / green per Mouser listing) |
ATMEGA164PA-ANR 44-tqfp (10x10 mm) 引脚配置指南
ATMEGA164PA-ANR（44-tqfp (10x10 mm) 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： ATMEGA164PA-ANR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATMEGA164PA-ANR 适用于 6 应用s: Industrial Automation and Control, Battery-Powered Sensor Nodes, Consumer Appliances and HVAC Control, Metering and Energy Monitoring, Hobby, Maker, and Educational Platforms, Networking and Communication Accessories.
Industrial Automation and Control
The ATMEGA164PA-ANR fits industrial control nodes because its 32 GPIO lines drive relays, optocouplers, and status LEDs directly, while the three timer/counters generate PWM outputs for actuator and motor speed control without CPU overhead. The two USARTs allow one channel to communicate with a PLC or SCADA link (Modbus over RS-485 via a transceiver) while the second services a local HMI or configuration terminal. The 8-channel 10-bit ADC reads analog process variables such as pressure, temperature, and potentiometer setpoints with roughly 1 mV-class resolution at 5V supply. Operating from 1.8V to 5.5V at up to 20 MHz, it tolerates noisy industrial rails, and the 512 B EEPROM stores calibration and configuration data across power cycles without external NVM.
推荐
Battery-Powered Sensor Nodes
For battery-operated sensing products, the picoPower technology of the ATMEGA164PA-ANR is the decisive parameter: multiple sleep modes with an asynchronous real-time counter allow the MCU to sleep in the low-microamp class between measurements while keeping a time base alive. A typical duty cycle wakes the part on timer interrupt, samples one or more of the 8 ADC channels measuring temperature, humidity, or voltage, and transmits the packet over USART to a wireless module before returning to sleep. The wide 1.8V to 5.5V supply range lets the design run directly from two alkaline cells or a single lithium cell via a simple LDO, extending battery life. The 16 KB flash comfortably holds a lightweight sensor-firmware image with sensor linearization tables in EEPROM.
推荐
Consumer Appliances and HVAC Control
White goods, fan coils, and HVAC boards benefit from the ATMEGA164PA-ANR's blend of PWM generation, TWI (I2C) bus for user-interface peripherals, and 10-bit ADC for NTC thermistor reading. The three timer/counters with compare modes independently drive PWM channels for blower speed, damper servo positioning, and backlight dimming, while hardware TWI communicates with display drivers, EEPROM, and capacitive-touch controllers on the front panel. The 20 MHz clock provides enough headroom for PI control loops at typical 10-100 Hz HVAC update rates with margins for communication handling. Its wide 1.8V-5.5V input range and industrial-grade AVR robustness simplify qualification across 3.3V and 5V platform variants of the same appliance board.
推荐
Metering and Energy Monitoring
Energy meters and submetering nodes use the ATMEGA164PA-ANR's 8-channel 10-bit ADC to sample voltage and current channels, computing RMS power in software; the 20 MHz single-cycle AVR core provides sufficient instruction throughput for fixed-point DSP-style accumulation at 50/60 Hz line frequencies. The 512 B EEPROM preserves cumulative energy registers, tamper flags, and calibration coefficients through brownouts and power loss, a critical metering requirement. The two USARTs allow a primary RS-485/Modbus communication channel plus a secondary optical or service port for calibration in the field. The picoPower sleep modes also suit battery-backed or energy-harvesting meter variants where standby current is budgeted in microamps.
推荐
Hobby, Maker, and Educational Platforms
The AVR ecosystem, free Microchip Studio/AVR-GCC toolchain, and ubiquitous ISP programmers make the ATMEGA164PA-ANR attractive for educational boards and open hardware. Its 32 I/O and dual USART allow a single MCU to drive LCDs, keypads, and a debug console simultaneously, and the familiar ATmega architecture matches the enormous base of AVR tutorials and libraries. The 16 KB flash is adequate for most classroom projects, including Arduino-core ports, while the 1 KB SRAM suits small state machines and protocol stacks. DebugWIRE requires only the reset line, so low-cost development boards can expose full debugging without dedicating pins, an advantage over many competing 8-bit families in teaching environments.
推荐
Networking and Communication Accessories
Small networking peripherals - serial-to-Ethernet converters, sensor gateways, and configuration front-ends - use the ATMEGA164PA-ANR's two USARTs to bridge device buses: one port talks to the target equipment (RS-232/485), the other to a module or service processor, while TWI manages a network EEPROM storing MAC addresses and configuration blocks. The 20 MHz core sustains buffered UART throughput well beyond 115200 baud with interrupt-driven FIFOs in the 1 KB SRAM, and hardware SPI can drive fast shift registers for status panels. The wide 1.8V-5.5V supply range allows direct interfacing with both 3.3V modules and legacy 5V line circuits using appropriate level considerations, consolidating what would otherwise need two voltage-domain MCUs.
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推荐产品汇总
工程参考数据： ATMEGA164PA-ANR ——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 | ATMEGA164A-AU | ATMEGA324PA-AU | ATMEGA644PA-AU | ATMEGA1284P-AU |
|---|---|---|---|---|---|
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16 KB | 16 KB | 32 KB | 64 KB | 128 KB |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Supply Voltage Range | 1.8 V to 5.5 V | 2.7 V to 5.5 V (standard-power variant) | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| picoPower Low-Power Technology | Yes | No | Yes | Yes | Yes |
| EEPROM | 512 B | 512 B | 1 KB | 2 KB | 4 KB |
关键差异点
- picoPower technology for battery designs （对比 ATMEGA164A-AU)
- Lowest cost in same-footprint family （对比 ATMEGA324PA-AU)
- Widest migration headroom on one PCB （对比 ATMEGA1284P-AU)
设计说明
Connect all VCC pins (as well as AVCC) to a clean supply and place a 0.1 uF ceramic capacitor at each supply pin, plus a bulk 10 uF capacitor per board rail. AVCC must be tied to VCC through a low-pass filter (for example 10 ohm resistor plus 0.1 uF) when ADC accuracy matters, since digital switching noise on AVCC directly degrades the 10-bit ADC's effective resolution. Never leave AVCC floating even if the ADC is unused - the datasheet requires it connected for correct port-A operation.
Fuse configuration is the most common failure mode when migrating across the ATmega164A/PA/324A/PA/644A/PA/1284/P family: clock-source, CKDIV8, and debugWIRE fuse defaults differ between variants, and enabling debugWIRE disables normal ISP access until it is disabled again through debug hardware. Also verify Brown-out Detection (BOD) fuses for battery designs - without BOD, EEPROM writes during supply collapse can corrupt calibration data stored in the 512 B EEPROM.
The 44-TQFP (10x10 mm) footprint needs no thermal pad, but use 0.5 mm-pitch layout rules per IPC-SM-782-style land-pattern guidance and place the crystal within 10 mm of XTAL1/XTAL2 with ground guard traces to reduce jitter and stray coupling. Route the two USART and SPI buses away from ADC input traces; if PA0-PA7 (the ADC port) run parallel to switching traces, insert a ground shield trace to protect the 10-bit conversion results from crosstalk artifacts.
Estimated: at 5V, 20 MHz, and full peripheral activity, the ATMEGA164PA draws only in the low tens of milliamperes class, giving roughly 100-150 mW dissipation - negligible for a 44-TQFP on standard FR4, so no heatsinking is required. Sleep-mode design matters far more than thermal design in this device: real system power is dominated by how long the picoPower core remains asleep with the real-time counter running.
合规信息
Mouser listing describes the part as 'GRN' (green/halogen-free). RoHS and lead-free status per standard Microchip ordering-code conventions; REACH and conflict-minerals statements not stated in the provided data.