ATMEGA164PA-MCH Tech Specifications
Microchip - ATMEGA164PA-MCH technical specifications, attributes, parameters and parts with similar specifications to Microchip - ATMEGA164PA-MCH

Product Attribute	Attribute Value
Part Number	ATMEGA164PA-MCH
Package	QFN-44(5x5)
Description	QFN-44(5x5)
Stock Condition	Get 7100 pcs available quantity at Allelco
Payment	PayPal / TT / Credit Card / Western Union
Allelco Certifications	ESD / ISO 9001 / ISO 13485 / ISO 28000

Product Attribute	Attribute Value
Manufacturer	Microchip Technology
RoHs Status	-
Warranty	100% Perfect Functions
Transport port	Hong Kong
Shipping by	DHL / FedEx / UPS / TNT / SF Express
RFQ Email	info@allelco.com

Parts Introduction

Manufacturer Part Number

ATMEGA164PA-MCH

Manufacturer

microchip-technology

Introduction

The ATMEGA164PA-MCH is a high-performance, low-power 8-bit AVR RISC-based microcontroller featuring advanced FLASH memory, SRAM, and EEPROM. It combines powerful processing capabilities with extensive I/O and communication interfaces, making it an ideal choice for a wide range of embedded applications.

Product Features and Performance

8-bit AVR RISC CPU with 20MHz clock speed

16KB FLASH program memory

1KB SRAM

512 bytes EEPROM

8 channels 10-bit ADC

I2C, SPI, and UART/USART interfaces

Brown-out detection and reset

Power-on reset

Watchdog timer

Product Advantages

High-performance and low-power operation

Extensive on-chip peripherals and interfaces

Flexible clocking options

Wide operating voltage range (1.8V to 5.5V)

Wide temperature range (-40°C to 85°C)

Key Reasons to Choose This Product

Proven AVR architecture with extensive ecosystem and development tools

Ideal for a wide range of embedded applications, from industrial control to consumer electronics

Low power consumption enables battery-powered designs

Robust design and reliability for mission-critical applications

Quality and Safety Features

Fully compliant with relevant safety standards

Robust design for reliable operation in harsh environments

Thorough testing and quality control processes

Compatibility

The ATMEGA164PA-MCH is compatible with a wide range of AVR-based MCU products, enabling seamless integration and migration of existing designs.

Application Areas

Industrial automation and control

Home and building automation

Automotive electronics

Consumer electronics

Medical devices

Robotics and IoT applications

Product Lifecycle

The ATMEGA164PA-MCH is an active product, and there are currently no plans for discontinuation. Equivalent or alternative models available include the ATMEGA164A, ATMEGA164PA, and ATMEGA164P. For more information, please contact our sales team through our website.

Frequently Asked Questions(FAQ)

What is the recommended operating voltage range for the ATMEGA164PA-MCH microcontroller, and how does this impact power supply design in battery-operated embedded systems?: The ATMEGA164PA-MCH operates over a wide supply voltage range of 1.8V to 5.5V, enabling flexible power management across various embedded applications. This broad range supports direct operation from single-cell lithium-ion batteries (down to ~3.0V) or alkaline cells without additional regulation in low-power modes. However, designers must ensure stable voltage delivery within ±5% during active periods, especially when using the internal 20MHz oscillator, which increases current draw. In sub-3V designs, clock accuracy may degrade due to reduced noise margins, so external crystal options should be evaluated for timing-critical tasks.

How does the 16KB flash memory size of the ATMEGA164PA-MCH affect firmware development and code organization compared to smaller AVR models?: With 16KB of flash organized as 8K x 16 bits, the ATMEGA164PA-MCH provides sufficient space for complex state machines, protocol stacks, and moderate data logging—far exceeding basic sensor polling routines found in 2KB or 8KB variants. This capacity allows use of standard C libraries like printf() or RTOS primitives without aggressive optimization. Nevertheless, developers must still manage code density carefully; each interrupt vector consumes 4 bytes, and ISRs should avoid dynamic allocation or recursion to prevent stack overflows in constrained environments.

What are the key differences between the ATMEGA164PA-MCH and ATMEGA164A-MCH, particularly regarding performance and long-term availability?: While both share identical core specifications—including 8-bit AVR architecture, 20MHz speed grade, and 44-pin QFN packaging—the "PA" suffix in the ATMEGA164PA-MCH indicates enhanced power efficiency features such as improved sleep currents and lower active-mode leakage. These improvements make the PA variant more suitable for energy-sensitive designs. Additionally, Microchip’s product lifecycle policies favor newer "PA" revisions for extended production, whereas older "-A" parts may enter end-of-life phases sooner. Designers targeting mass deployment should prioritize the ATMEGA164PA-MCH for future-proofing.

Can the ATMEGA164PA-MCH drive multiple high-current peripheral devices directly from its I/O pins without external buffers?: No, the ATMEGA164PA-MCH’s 32 general-purpose I/O pins are rated for typical CMOS-level loads up to 20–40mA per pin, with an absolute maximum of 40mA total per port and 100mA across all ports combined. Driving motors, relays, or LEDs above these thresholds requires external transistors or driver ICs. For example, a 100mA LED array would exceed safe operating limits if routed through MCU pins alone, necessitating discrete MOSFETs or dedicated driver stages connected to PWM-capable outputs like PB0–PB3.

What considerations apply when selecting an external crystal versus relying on the internal oscillator for the ATMEGA164PA-MCH in precision timing applications?: The internal RC oscillator provides reasonable accuracy (±10% over temperature), making it adequate for UART baud rates or simple timers. However, for applications requiring <1% frequency stability—such as industrial communication protocols (CAN, Ethernet MAC timing)—an external 16–20MHz crystal should be used with load capacitors matched to the crystal’s specified values (typically 22pF). Note that enabling external crystals reduces power consumption slightly compared to internal RC operation at full speed, but disables certain sleep modes that depend on calibrated oscillators.

How does the ATMEGA164PA-MCH handle brownout detection, and what reset behavior occurs if Vcc drops below the BOD threshold?: The device includes a programmable brownout detector (BOD) that monitors Vcc and triggers a chip-wide reset if voltage falls below a selectable threshold—either 2.7V, 4.3V, or disabled via fuse settings. When triggered, all registers revert to defaults, and program execution halts until Vcc stabilizes above the threshold. For systems powered by unstable sources (e.g., solar panels), setting BOD to 2.7V prevents erratic behavior while allowing operation down to 2.7V. However, this increases susceptibility to glitches near the boundary, so input filtering or hysteresis circuits are advisable.

Is the ATMEGA164PA-MCH suitable for automotive applications requiring AEC-Q100 qualification?: No, the ATMEGA164PA-MCH is not AEC-Q100 qualified and is designed for industrial temperature ranges (-40°C to +85°C TA). While it meets JEDEC industrial standards, automotive-grade reliability demands extended testing under thermal cycling, humidity, and EMI conditions beyond standard commercial components. For safety-critical vehicular systems, consider Microchip’s automotive-specific AVR families like SAM D or SAMD21G18A, which offer certified variants with enhanced ESD protection and longer lifecycles.

What trade-offs exist between using the ATMEGA164PA-MCH’s internal ADC versus an external precision analog front-end?: The built-in 8-channel 10-bit ADC offers 10-bit resolution with up to 15kSPS sampling rate, sufficient for many sensor interfaces. However, its reference voltage defaults to Vcc, introducing measurement errors if Vcc fluctuates—a common issue in battery-powered systems. External ADCs like the ADS1115 provide 16-bit resolution, independent references, and I2C interface, yielding superior accuracy (±0.1% vs. ±2% typical for internal ADC). For high-impedance sensors (thermistors, strain gauges), adding buffer amplifiers before the ATMEGA164PA-MCH’s ADC inputs prevents loading effects and improves linearity.

How does the ATMEGA164PA-MCH compare to the ATMEGA324PA-MCH in terms of peripheral integration and pin compatibility?: Both use the same core and package, but the ATMEGA324PA-MCH adds 16KB more flash (32KB total) and doubles RAM to 2KB, along with extra UART/USART modules and comparator peripherals. Crucially, they share identical pinouts and instruction sets, allowing binary-compatible code migration. If your design exceeds 16KB flash needs but lacks UART2 or larger scratchpad memory, the ATMEGA324PA-MCH offers better value. Otherwise, the ATMEGA164PA-MCH remains optimal for cost-sensitive applications with moderate complexity.

What precautions should be taken during PCB layout to ensure reliable operation of the ATMEGA164PA-MCH in noisy industrial environments?: Place decoupling capacitors (100nF ceramic + 10µF tantalum) as close as possible to Vcc/GND pads on the 44-QFN package, paying special attention to the exposed thermal pad, which serves as a secondary ground plane. Route high-speed signals (SPI, I2C) away from analog inputs and clock traces to minimize crosstalk. Use guard rings around sensitive analog nodes and avoid routing digital return paths under the MCU. Ground planes should be unbroken beneath the component, and via stitching enhances EMI immunity—critical given the device’s operation up to 20MHz.

Customers Also Interested in

Recommended Products

Customer Reviews

Evaluation: 10 Articles

Dani***alkerTech

Jun 1, 2026

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.
Yuki***aka88

May 26, 2026

信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。
Stev***aker

May 20, 2026

Solid diode for power rectification. Works well in switching circuits.
Bran***Lewis

May 11, 2026

Compact FPGA with good performance. Suitable for basic signal processing tasks.
Oliv***arris

May 7, 2026

Reliable I/O expander. Works well in embedded control applications.
Jess***Jones

Apr 17, 2026

It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.
Mich***Smith

Apr 17, 2026

Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.
Aman***arris

Apr 3, 2026

It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.
Mike***nch

Apr 3, 2026

Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.
Daic***K.

Mar 23, 2026

Very good. No issue after long time testing.

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Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

Use your express account for shipment if you have one.
Use our account for the shipment. Refer to the table below for the approximate charges.

(Different time frame / countries / package size has different price.)

Delivery Method

Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region	Country	Logistic Time(Day)
America	United States	5
America	Brazil	7
Europe	Germany	5
	United Kingdom	4
	Italy	5
Oceania	Australia	6
Oceania	New Zealand	5
Asia	India	4
Asia	Japan	4
Middle East	Israel	6

DHL & FedEx Shipment Charges Reference
Shipment charges(KG)	Reference DHL(USD$)
0.00kg-1.00kg	USD$30.00 - USD$60.00
1.00kg-2.00kg	USD$40.00 - USD$80.00
2.00kg-3.00kg	USD$50.00 - USD$100.00

Note:: The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.

QC (Quality Warranty)
Payment Support
Packaging
Certifications & Memberships

QC (Quality Warranty)

Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.

Strict quality inspection builds a solid foundation for electronic component quality.

Visual inspection
Performance testing and reliability verification
Standardized full-process testing
Precise control of every parameter

We eliminate defective components and ensure the stable operation of electronic devices through professional quality standards.

Quality Inspection

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Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.

ESD

Certifications & Memberships

Third-party certified, strict quality control. Our certification

ISO 9001: 2015
ISO 13485: 2016
ISO 14001: 2015
ISO 28000: 2007
ISO 45001: 2018
GB/T 27922-2011

SMTA
IPC
ESD
PSMA

ATMEGA164PA-MCH

Microchip
41D-ATMEGA164PA-MCH

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ATMEGA164PA-MCH - Microchip

Specifications

Parts Introduction

Manufacturer Part Number

Manufacturer

Introduction

Product Features and Performance

Product Advantages

Key Reasons to Choose This Product

Quality and Safety Features

Compatibility

Application Areas

Product Lifecycle

Frequently Asked Questions(FAQ)

Customers Also Interested in

Recommended Products

Customer Reviews

Evaluation: 10 Articles

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

Solid diode for power rectification. Works well in switching circuits.

Compact FPGA with good performance. Suitable for basic signal processing tasks.

Reliable I/O expander. Works well in embedded control applications.

It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

Very good. No issue after long time testing.

Write a Review

Shipment

Delivery Time

Delivery Cost

Delivery Method

QC (Quality Warranty)

Payment Support

Packaging

Electrostatic Discharge Protection and Handling

Certifications & Memberships

ATMEGA164PA-MCH

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Feedback

Please refer to the English Version as our Official Version.