ATMEGA164PA-MCHR - 8-bit AVR MCU 16KB Flash 20MHz | Microchip
MPN: ATMEGA164PA-MCHR ✓ Hoạt độngATMEGA164PA-MCHR Tóm tắt
An 8-bit AVR microcontroller is a Harvard-architecture RISC processor that executes most instructions in a single clock cycle, delivering throughput approaching 1 MIPS per megahertz. Within the power management and embedded control hierarchy, MCUs such as this sit at the node between raw logic devices and application processors, handling sensing, timing, and communication tasks in embedded systems.
Key differentiating features include read-while-write flash for in-system programming, picoPower low-power technology for battery-operated designs, three flexible timer/counters with compare modes and PWM, and a real-time counter. Two USARTs enable multi-channel serial communication, while a byte-oriented Two-Wire serial interface (TWI/I2C) and SPI support peripheral expansion.
Technical depth comes from the advanced AVR RISC architecture: 133 powerful instructions, most single-cycle, with 32 general purpose working registers directly connected to the ALU. This register-file-to-ALU connection eliminates the accumulator bottleneck of conventional 8-bit MCUs and allows system designers to optimize power consumption versus processing speed.
Typical applications include industrial control nodes, consumer appliance controllers, sensor interface boards, and battery-powered metering products where the 10-bit ADC and picoPower sleep modes reduce system cost and energy use.
A key design consideration: the 44-QFN package requires careful exposed-pad grounding for thermal and signal integrity, and the 20MHz maximum clock at 4.5-5.5V must be derated at lower supply voltages.
This page synthesizes distributor pricing, drop-in alternatives within the ATmega family, and practical design notes not consolidated in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho ATMEGA164PA-MCHR — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ATMEGA164PA-MCHR (cùng hình factor và footprint) — khác nhau ở Package, ADC, Flash Memory, Throughput, Instruction Set.
ATMEGA164P-20MUR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA164P-20MQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA164A-MU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA1284P-MUR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATMEGA164PA-MCHR Tỷ lệ tối đa & tính chất điện
| Core Architecture | AVR 8-bit RISC |
| Core Size | 8-Bit |
| Tần số xung maksimum | 20 MHz |
| Flash Memory | 16 KB (8K x 16) |
| EEPROM | 512 B |
| SRAM | 1 KB |
| Supply Voltage Range | 2.7 V to 5.5 V |
| General Purpose I/O Lines | 32 |
| USART Interfaces | 2 |
| Two-Wire Interface (TWI/I2C) | 1 |
| Timers/Counters | 3 flexible timer/counters with compare modes and PWM |
| ADC | 8-channel 10-bit |
| Low Power Technology | picoPower |
| In-System Programming | ISP flash with read-while-write |
| Instructions | 133 powerful instructions, most single-cycle |
| Hộp | 44-VQFN (5x5 mm), exposed pad |
| Kiểu lắp đặt | Surface Mount |
Cấu hình chân ATMEGA164PA-MCHR
| Chân 1 | PA4 (ADC4) — Port A bit 4 / ADC channel 4 |
| Chân 2 | PA5 (ADC5) — Port A bit 5 / ADC channel 5 |
| Chân 3 | PA6 (ADC6) — Port A bit 6 / ADC channel 6 |
| Chân 4 | PA7 (ADC7) — Port A bit 7 / ADC channel 7 |
| Chân 5 | AGND — Analog ground |
| Chân 6 | AVCC — Analog supply for ADC |
| Chân 7 | PC7 — Port C bit 7 |
| Chân 8 | PC6 — Port C bit 6 |
| Chân 9 | PC5 — Port C bit 5 |
| Chân 10 | PC4 — Port C bit 4 (TWI SDA) |
| Chân 11 | PC3 — Port C bit 3 |
| Chân 12 | PC2 — Port C bit 2 |
| Chân 13 | PC1 — Port C bit 1 |
| Chân 14 | PC0 — Port C bit 0 (TWI SCL) |
| Chân 15 | PD7 — Port D bit 7 |
| Chân 16 | PD6 — Port D bit 6 |
| Chân 17 | PD5 — Port D bit 5 |
| Chân 18 | PD4 — Port D bit 4 (USART1) |
| Chân 19 | PD3 — Port D bit 3 |
| Chân 20 | PD2 — Port D bit 2 (INT0) |
| Chân 21 | PD1 — Port D bit 1 (USART TXD0) |
| Chân 22 | PD0 — Port D bit 0 (USART RXD0) |
| Chân 23 | VCC — Digital supply |
| Chân 24 | GND — Digital ground |
| Chân 25 | PB0 (SS) — Port B bit 0 / SPI slave select |
| Chân 26 | PB1 — Port B bit 1 |
| Chân 27 | PB2 — Port B bit 2 |
| Chân 28 | PB3 (MOSI) — Port B bit 3 / SPI MOSI |
| Chân 29 | PB4 (MISO) — Port B bit 4 / SPI MISO |
| Chân 30 | PB5 (SCK) — Port B bit 5 / SPI clock |
| Chân 31 | PB6 (XTAL1) — Port B bit 6 / crystal input |
| Chân 32 | PB7 (XTAL2) — Port B bit 7 / crystal output |
| Chân 33 | RESET — Reset input (active low) |
| Chân 34 | VCC — Digital supply |
| Chân 35 | GND — Digital ground |
| Chân 36 | PD5/T1 alternate — Timer/counter function pin (per datasheet 44-pin figure) |
| Chân 37 | PD4/XCK alternate — USART external clock function pin (per datasheet 44-pin figure) |
| Chân 38 | PA0 (ADC0) — Port A bit 0 / ADC channel 0 |
| Chân 39 | PA1 (ADC1) — Port A bit 1 / ADC channel 1 |
| Chân 40 | PA2 (ADC2) — Port A bit 2 / ADC channel 2 |
| Chân 41 | PA3 (ADC3) — Port A bit 3 / ADC channel 3 |
| Chân 42 | AREF — ADC analog reference input |
| Chân 43 | GND — Ground |
| Chân 44 | AVCC — Analog supply |
Ứng dụng tiêu biểu
ATMEGA164PA-MCHR phù hợp cho 6 Áp dụngs: Industrial Control Nodes, Battery-Powered Metering, Consumer Appliance Controllers, Sensor Interface and Data Acquisition, Embedded Communication Adapters, Hobbyist and Maker Embedded Systems.
Industrial Control Nodes
The ATMEGA164PA-MCHR fits industrial control nodes that need deterministic timing and robust serial links. Its 20MHz AVR core delivers approximately 1 MIPS/MHz throughput, while three timer/counters with compare modes generate PWM for actuators and precise event timing. Dual USARTs allow simultaneous fieldbus and diagnostic links, and the TWI interface manages remote I/O expanders. The 44-VQFN exposed-pad package grounds solidly to industrial PCBs, and 2.7-5.5V operation tolerates regulated 3.3V or 5V rails. The 8-channel 10-bit ADC reads analog process sensors directly, reducing external component count in PLC-adjacent monitoring boards.
Được đề xuất
Battery-Powered Metering
Battery metering benefits directly from the picoPower technology in the ATMEGA164PA-MCHR. The real-time counter maintains timekeeping while the CPU sleeps, and multiple sleep modes let firmware duty-cycle the 20MHz core so average current is dominated by microamp-level sleep current rather than active execution. The 8-channel 10-bit ADC samples current and voltage sense front-ends without an external converter, and 512B EEPROM stores calibration and consumption logs that survive power loss. With 16KB flash, both metrology firmware and a communication stack fit on-chip, and the 44-QFN 5x5 mm footprint suits compact meter housings.
Được đề xuất
Consumer Appliance Controllers
Consumer appliance control boards - from coffee machines to HVAC user interfaces - are a strong fit for the ATMEGA164PA-MCHR. Thirty-two GPIO lines drive keypads, LEDs, relays, and stepper or fan controls directly; PWM outputs from the three timer/counters dim displays and control motor speed efficiently. The hardware TWI bus interfaces touch controllers or EEPROM peripherals, while a USART handles factory test and firmware update links. The industrial temperature grading and 2.7-5.5V supply cover appliance rail tolerances, and the 5x5 mm VQFN with exposed pad keeps controller PCBs small and cost-optimized for volume production.
Được đề xuất
Sensor Interface and Data Acquisition
The ATMEGA164PA-MCHR serves as a compact sensor-interface MCU where multiple analog channels converge. Its 8-channel 10-bit ADC, multiplexed across the port-A pins, digitizes temperature, pressure, and level sensors without external front-end converters for mid-accuracy applications. The SPI and TWI buses add higher-resolution external ADCs or digital sensors, and dual USARTs stream processed readings to a host or radio module. Timer-driven sampling produces regular conversion intervals for FFT-ready or averaging firmware. The picoPower sleep modes suit intermittently powered sensor nodes, and 1KB SRAM buffers enough samples for local filtering before transmission.
Được đề xuất
Embedded Communication Adapters
Protocol-adapter and gateway boards exploit the ATMEGA164PA-MCHR's dual USARTs: one channel interfaces a field device (RS-485 or RS-232 via external transceiver) while the second talks to a host or radio. The TWI and SPI hardware masters handle EEPROM, RTC, and peripheral expansion concurrently with serial traffic, and the 16KB ISP flash with read-while-write supports bootloader-based field firmware updates. Timer capture/compare functions decode or generate timing-critical signals. The compact 44-VQFN package fits dongle-format adapters, and the AVR single-cycle instruction set keeps interrupt latency low for reliable framing at standard UART baud rates.
Được đề xuất
Hobbyist and Maker Embedded Systems
The AVR ecosystem, mature ISP tooling, and free GCC toolchain make the ATMEGA164PA-MCHR attractive to makers upgrading from ATmega328-class parts. Thirty-two GPIO and 16KB flash provide headroom for robotics, display, and automation projects that outgrow smaller AVRs, while dual USARTs support simultaneous Bluetooth/Wi-Fi module and debug connections. ICSP programming with MPLAB SNAP or USBasp requires only SPI plus RESET, and debugWIRE enables on-chip debugging through the reset line. The exposed-pad QFN requires a hot-plate or reflow process rather than hand soldering; hobbyists preferring socketed parts should use the TQFP ATMEGA164PA-AUR instead.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATMEGA164PA-MCHR — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | ATMEGA164P-20MUR | ATMEGA164A-MU | ATMEGA1284P-MUR |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-VQFN (5x5 mm) exposed pad | 44-VQFN (MLF) - same | 44-VQFN (MLF) - same | 44-VQFN (MLF) - same |
| Max Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Flash Memory | 16 KB | 16 KB | 16 KB | 128 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 16 KB |
| EEPROM | 512 B | 512 B | 512 B | 4 KB |
| picoPower Technology | Yes (PA version) | No (P version) | No (A version) | No (P version) |
| GPIO | 32 | 32 | 32 | 32 |
Bảo phân biệt quan trọng
- picoPower low-power technology (vsATMEGA164P-20MUR)
- Memory-upgrade path without respin (vsATMEGA1284P-MUR)
- Exposed-pad QFN over TQFP (vsATMEGA164PA-AUR)
Ghi chú thiết kế
The 44-QFN 5x5 mm exposed pad is the primary ground connection for the ATMEGA164PA-MCHR. Solder it to a ground plane array of 5x5 via stitches (estimated: 9-25 vias under the pad) to achieve both low inductance and acceptable thermal dissipation. Per Microchip MLF package application guidance, printed the exposed pad with a slightly reduced stencil opening (50-70% coverage) to avoid excessive solder paste that can float the chip during reflow and bridge the perimeter pads.
Provide independent decoupling on the digital VCC pins and the AVCC/AGND pair. Estimated typical practice: 100nF X7R ceramic within 2mm of each VCC pin plus 4.7-10uF bulk per rail. Connect AVCC to VCC through an LC or RC filter when ADC accuracy matters, because switching noise on AVCC directly degrades the 10-bit converter's effective resolution. Keep the AGND pin tied to a quiet analog ground island connected to the main plane at one point.
AVR clock frequency depends on supply voltage: 20MHz operation is only valid at the upper end of the 2.7-5.5V range. Derate f_MAX per the datasheet speed-grade curve when running from a 3.3V rail. Also verify fuse settings (CKSEL, CKDIV8, BOOTRST) before first power-up - an incorrect clock fuse selection on a QFN part is difficult to recover, so enable debugWIRE or ISP access on the RESET/SPI pins and never repurpose RESET as GPIO unless recovery via 12V parallel programming is acceptable to your process.
Thông tin tuân thủ
Retrieved distributor data did not include explicit compliance certificate text; confirm RoHS/REACH declarations on the Microchip product page. Industrial temperature grade indicated in Mouser listing.
