ATMEGA164A-MUR - 16KB Flash AVR MCU 20MHz VQFN-44 | Microchip
料号： ATMEGA164A-MUR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.38 | $4.38 |
| 10 | $4.05 | $40.50 |
| 100 | $3.75 | $375.00 |
| 500 | $3.45 | $1,725.00 |
| 1,000 | $3.2 | $3,200.00 |
ATMEGA164A-MUR 概述
A microcontroller (MCU) integrates a processor core, program memory, data memory, and peripherals on a single chip, sitting at the lowest level of the embedded-system hierarchy (semiconductor -> MCU -> embedded board -> complete device). The ATmega family is based on the AVR enhanced RISC architecture, which executes most of its 133 powerful instructions in a single clock cycle, achieving throughput approaching 1 MIPS per MHz.
Key features include 16 KB of self-programmable ISP Flash with read-while-write support, 512 B EEPROM for non-volatile calibration data, 1 KB SRAM, two 8-bit timers/counters and one 16-bit timer with PWM, an 8-channel 10-bit ADC, USART, SPI, and two-wire (I2C/TWI) interfaces, plus JTAG for boundary scan and on-chip debugging. The 20 MHz maximum clock rate delivers roughly 20 MIPS of performance.
Architecturally, the AVR core uses a Harvard structure with 32 general-purpose working registers directly connected to the ALU, allowing two independent register accesses in one instruction. In-system programmability permits firmware updates on the assembled board via SPI (ISP) or a JTAG interface, reducing production cost and field-update effort.
Typical applications include industrial control and automation nodes, sensor and data-logging systems, consumer appliance controllers, and motor-control or lighting subsystems that need moderate flash, rich analog input, and multiple serial buses in a space-saving QFN package.
Design consideration: keep the supply within 1.8 V to 5.5 V and note that maximum clock frequency derates at low supply voltage and elevated temperature; decouple VCC and AVCC with 100 nF ceramics placed close to the exposed pad, which should be soldered to a ground pour for thermal and EMI performance.
This page synthesizes distributor pricing, same-footprint drop-in alternatives, and practical design guidance not found in the manufacturer datasheet, with pricing referenced as of 2026-09-16.
直接替换替代料： ATMEGA164A-MUR ——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： ATMEGA164A-MUR （相同外形与封装尺寸） ——差异在于 Package, EEPROM, SRAM, ADC, Instruction Set.
快速对比工具——选择替代料号进行并排对比：
ATMEGA164A-MU
✅ 直接替换✓ 有现货
$3.01 / 个
查看数据手册 →ATMEGA164PA-MUR
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.89 / 个
查看数据手册 →ATMEGA164P-20MU
✅ 直接替换✓ 有现货
$2.98 / 个
查看数据手册 →ATMEGA324PA-MUR
✅ 直接替换📋 参考替代料（不在目录中）
ATMEGA324PB-MU
✅ 直接替换✓ 有现货
$1.35 / 个
查看数据手册 →ATMEGA644A-MU
✅ 直接替换📋 参考替代料（不在目录中）
ATMEGA1284P-MUR
✅ 直接替换✓ 有现货
联系询价
查看数据手册 →ATMEGA164A-MUR 最大额定值与电气特性
| Core Architecture | AVR 8-bit RISC |
| Core Size | 8-bit |
| 最大时钟频率 | 20 MHz |
| Flash Memory | 16 KB (8K x 16) |
| EEPROM | 512 B |
| SRAM | 1 KB |
| Supply Voltage Range | 1.8 V to 5.5 V |
| General Purpose I/O | 32 I/O lines |
| ADC Resolution | 10-bit |
| ADC Channels | 8 channels |
| Communication Interfaces | USART, SPI, TWI (I2C) |
| Timers | 2 x 8-bit, 1 x 16-bit |
| Instruction Count | 133 instructions, most single-cycle |
| 封装 | 44-VQFN (7x7 mm) with exposed pad |
| 工作温度 | -40C to +85C (industrial) |
| 安装类型 | Surface Mount |
| Packaging | Tape & Reel (T&R), Green |
ATMEGA164A-MUR 44-vqfn (7x7 mm) with exposed pad 引脚配置指南
ATMEGA164A-MUR（44-vqfn (7x7 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： ATMEGA164A-MUR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATMEGA164A-MUR 适用于 6 应用s: Industrial Control and Automation, Sensor and Data Acquisition Systems, Consumer Appliance Controllers, Motor Control Subsystems, Battery-Powered Portable Devices, Communication and Interface Bridging.
Industrial Control and Automation
The ATMEGA164A-MUR fits factory automation nodes that need deterministic single-cycle instruction execution and robust peripherals. Its 20 MHz AVR core delivers about 20 MIPS for PLC-style logic loops, while the 10-bit ADC with 8 channels reads analog sensors such as temperature and pressure transmitters, and USART, SPI, and TWI interfaces link to HMIs, motor drives, and industrial buses. The -40C to +85C industrial temperature rating and 1.8 V to 5.5 V supply tolerance handle electrically noisy factory environments. JTAG support enables on-board firmware validation during production, and 16 KB ISP Flash with read-while-write allows field firmware updates without disassembling the panel.
推荐
Sensor and Data Acquisition Systems
With an 8-channel 10-bit ADC and 1 KB SRAM, the ATMEGA164A-MUR is well suited for multi-sensor data-logging front ends. Port A can scan eight analog inputs in sequence, the 16-bit timer provides precise sampling intervals, and the 512 B EEPROM stores calibration constants that survive power loss without external memory. USART output streams results to a gateway or PC, while TWI (I2C) connects to digital sensors such as humidity and pressure ICs. Because conversion data can be buffered in SRAM and the Flash supports read-while-write, the part can log intermittent events to program memory at low system cost, all within the compact 7x7 mm VQFN footprint.
推荐
Consumer Appliance Controllers
Home appliances such as coffee machines, air conditioners, and small kitchen devices need inexpensive, reliable MCUs with PWM and display-driving capability. The ATMEGA164A-MUR provides two 8-bit and one 16-bit timer with PWM outputs for heater triac control, fan speed, and buzzer generation, while the ADC reads thermistors and user potentiometers. The 32 general-purpose I/O lines drive segment LCD or LED matrices through shift registers via SPI. Its Green RoHS-compliant package meets consumer environmental requirements, and tape-and-reel packing suits high-volume SMT lines. Field-proven AVR architecture reduces development risk across appliance product families.
推荐
Motor Control Subsystems
The ATMEGA164A-MUR handles DC and small BLDC motor control using its 16-bit timer PWM outputs for speed and duty-cycle drive, its 10-bit ADC for current-sense resistor and back-EMF feedback, and the USART/SPI for host commands. The AVR core executes PI control loops at approximately 20 MIPS, adequate for moderate-speed servo and pump applications. Interrupt-driven input capture measures tachometer pulses for closed-loop speed regulation. The industrial temperature rating supports thermally demanding motor enclosures. For designs needing more PWM channels or faster loops, the pin-compatible ATMEGA324PB-MU doubles memory and adds timers on the identical 44-VQFN PCB footprint.
推荐
Battery-Powered Portable Devices
Running from a single supply of 1.8 V to 5.5 V, the ATMEGA164A-MUR connects directly to two AA cells or a single Li-ion cell with regulation. Idle and power-down sleep modes of the AVR core extend battery life in handheld meters, remote controls, and wireless sensor tags; interrupt on pin-change or timer wake-up brings the 20 MHz core back within microseconds. The 512 B EEPROM retains user settings and usage counters through battery replacement. For ultra-low standby current designs, the pin-compatible picoPower variants ATMEGA164PA-MUR and ATMEGA164P-20MU drop in on the same PCB footprint with identical firmware and significantly reduced deep-sleep currents.
推荐
Communication and Interface Bridging
The ATMEGA164A-MUR works as a protocol bridge between system buses: its hardware USART handles RS-232/RS-485 links, SPI connects to Ethernet or CAN controllers and data-flash, and TWI (I2C) services EEPROM, RTC, and sensor devices. With 16 KB Flash, complete protocol stacks such as Modbus RTU slave fit comfortably. The 20 MHz clock sustains approximately 20 MIPS for concurrent buffering and translation, while 1 KB SRAM handles packet buffers for moderate throughput. The JTAG port simplifies bring-up of multi-bus designs, and the exposed-pad VQFN package provides solid ground return for signal integrity in industrial communication cabinets.
推荐
推荐产品汇总
工程参考数据： ATMEGA164A-MUR ——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-MU | ATMEGA324PA-MUR | ATMEGA644A-MU | ATMEGA1284P-MUR |
|---|---|---|---|---|---|
| Package | 44-VQFN (7x7 mm) | 44-VQFN (7x7 mm) - same | 44-VQFN - same | 44-VQFN - same | 44-VQFN - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16 KB | 16 KB | 32 KB | 64 KB | 128 KB |
| SRAM | 1 KB | 1 KB | 2 KB | 4 KB | 16 KB |
| EEPROM | 512 B | 512 B | 1 KB | 2 KB | 4 KB |
| Maximum Clock | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Low-Power Technology | Standard A-series | Standard A-series | picoPower (PA) | Standard A-series | picoPower (P) |
关键差异点
- Identical die in tray packaging available （对比 ATMEGA164A-MU)
- Lowest-cost entry point of the 44-VQFN ATmega family （对比 ATMEGA324PA-MUR)
- Memory-scaling upgrade path on one PCB （对比 ATMEGA1284P-MUR)
- Standard A-series power profile vs picoPower （对比 ATMEGA164PA-MUR)
设计说明
The ATMEGA164A-MUR uses a 44-pad VQFN with exposed pad that must be soldered to a ground pour for reliable grounding and heat dissipation. Design the land pattern per the Microchip QFN footprint guideline and use a via array (e.g., 5x5, 0.3 mm vias) under the exposed pad to tie it to the ground plane. Decouple VCC, AVCC, and the JTAG supply pin with 100 nF X7R ceramics placed within 3 mm of the pads, plus 10 uF bulk at the supply entry.
Keep the supply within 1.8 V to 5.5 V, but respect the speed-versus-voltage derating: full 20 MHz operation requires the upper portion of the supply range, so a 3.3 V system should verify the permissible f_MAX from the datasheet curve before choosing the crystal. Estimated guideline from family data: at 5 V the part runs 20 MHz, at 3.3 V plan roughly 13-14 MHz or less. Feed AVCC from a clean supply through an LC or RC filter to preserve 10-bit ADC accuracy, and keep analog trace lengths short.
Program the JTAGEN fuse state intentionally: JTAG is enabled on shipped ATmega parts, and if PC4-PC7 are needed as GPIO the JTAG fuse must be disabled - otherwise those port pins silently do not toggle, a frequent debugging trap on the 44-pin ATmega family. Also set the CKDIV8 fuse appropriately: when unprogrammed it divides the clock by 8, so a 20 MHz crystal boots at 2.5 MHz until the fuse is corrected.
For EMC on industrial boards, place a series ferrite bead on AVCC and route the ADC ground reference as a quiet analog island connected to the main ground at one point. Because the VQFN has no perimeter ground legs, rely on the exposed-pad via array as the low-inductance return path; adding stitching vias near clock and SPI traces reduces radiated emissions. Keep the 20 MHz crystal and its load capacitors as close to XTAL1/XTAL2 as the footprint allows, with a guard ground ring.
合规信息
Listed as 'Green' by FindIC distributor data (Microchip Green packaging excludes lead, halogens, and antimony). No REACH statement found in provided data.