ATMEGA162V-8MI - 8-bit AVR MCU 16KB Flash 8MHz | Microchip
MPN: ATMEGA162V-8MI β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.47 | $34.70 |
| 100 | $3.1 | $310.00 |
| 500 | $2.8 | $1,400.00 |
| 1,000 | $2.55 | $2,550.00 |
ATMEGA162V-8MI Overview
An 8-bit AVR microcontroller is a single-chip processor built on the AVR RISC architecture, in which most instructions execute in a single clock cycle to deliver throughput approaching 1 MIPS per MHz. Within the power-management hierarchy, it integrates CPU, program memory, data memory, timers, and serial interfaces into one semiconductor device, replacing multi-chip processor boards in embedded control systems.
Key features include 16KB (8K x 16) self-programmable Flash with a write endurance of 10,000 cycles, 35 general-purpose I/O lines, two 8-bit and one 16-bit timers with PWM outputs, and two USARTs plus SPI and TWI (I2C) serial interfaces. System-safety peripherals include Brown-out Detection/Reset, Power-on Reset, and a programmable Watchdog Timer with its own on-chip oscillator. The V supply grade supports battery-powered designs down to 1.8V.
The AVR core combines a rich instruction set with 32 general-purpose working registers, all directly connected to the ALU, enabling C-compiler-friendly code with high code density. Harvard architecture with separate program and data buses allows single-cycle instruction fetch while the previous instruction executes, producing the near-1 MIPS/MHz efficiency that lets designers trade clock speed directly against power consumption.
Typical applications include industrial control panels, building automation nodes, battery-powered instrumentation, and dual-UART communication converters, where the two USARTs, wide voltage range, and low-power modes provide a robust fit.
Design consideration: keep AREF decoupling close to the pin and observe the 8MHz ceiling across the full 1.8V range; above 8MHz this V-grade part must not be used.
This page synthesizes distributor inventory, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATMEGA162V-8MI β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ATMEGA162V-8MI (same form factor and footprint) β differing in Package, Core Architecture, EEPROM Size, JTAG Interface, Program Memory Size.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATMEGA162V-8MU
β Drop-Inβ In Stock
$5.15 / Unit
View Datasheet βATMEGA162V-8AI
β Drop-Inπ Reference alternative (not in catalog)
ATMEGA162V-8MC
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA162V-1MC
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$3.95 / Unit
View Datasheet βATMEGA162V-1MI
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA162L-8MC
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
Contact for price
View Datasheet βATMEGA162-16MU
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$2.19 / Unit
View Datasheet βATMEGA162V-8MI Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit AVR enhanced RISC |
| Max Clock Frequency | 8 MHz |
| Flash Program Memory | 16 KB (8K x 16) |
| SRAM | 1 KB |
| EEPROM | 512 B |
| Operating Voltage Range | 1.8 V to 5.5 V |
| General-Purpose I/O | 35 I/O pins |
| Timers/Counters | 2 x 8-bit, 1 x 16-bit with PWM |
| USART Interfaces | 2 |
| SPI | Yes (1 x SPI) |
| TWI (I2C) | Yes (1 x TWI) |
| Brown-out Detect/Reset | Yes |
| Power-on Reset | Yes |
| Watchdog Timer | Yes, with separate on-chip oscillator |
| PWM Channels | Yes |
| Package | 44-VQFN (7x7 mm) Exposed Pad |
| Mounting Type | Surface Mount |
| MIPS Rating | Up to 8 MIPS (approx. 1 MIPS/MHz) |
ATMEGA162V-8MI 44-vqfn (7x7 mm) exposed pad Pin Configuration Guide
Pin configuration for ATMEGA162V-8MI (44-vqfn (7x7 mm) exposed pad package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for ATMEGA162V-8MI.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA162V-8MI is suitable for 6 applications: Industrial Control Panels, Dual-UART Communication Converters, Battery-Powered Instruments, Building Automation Nodes, Embedded Training and Prototyping, Motor Control and PWM Actuation.
Industrial Control Panels
The ATMEGA162V-8MI fits industrial control panels because its -40C to +85C industrial temperature rating, Brown-out Detection, Power-on Reset, and Watchdog Timer create a self-monitoring controller core for unattended equipment. Its two USARTs allow simultaneous fieldbus communication and a local HMI or service port, while SPI and TWI connect expansion I/O expanders and ADCs. Running at 8MHz across 1.8V to 5.5V, it tolerates degraded rail conditions on noisy factory floors, and the 35 GPIO lines drive relays, contactors, and status indicators directly. According to Microchip's ATmega162 datasheet, throughput near 1 MIPS/MHz lets the panel logic run at lower clock rates, cutting power and EMI in DIN-rail enclosures.
Recommended
Dual-UART Communication Converters
Protocol converters between RS-232, RS-485, and Modbus RTU segments are the natural application for the ATMEGA162V-8MI's two independent USARTs - one channel handles the field side while the other serves the upstream link, with buffered, interrupt-driven serial I/O in the 1KB SRAM. The 8MHz clock provides roughly 8 MIPS, ample for CRC calculation and frame parsing at 115200 baud on both ports simultaneously. The industrial -40C to +85C rating suits DIN-rail and outdoor cabinets, and the 44-pad exposed-pad QFN grounds the converter board's reference plane directly through the MCU pad. The Watchdog Timer recovers the converter automatically if a communication fault or firmware hang occurs, important for unattended network nodes.
Recommended
Battery-Powered Instruments
With a 1.8V minimum supply, the ATMEGA162V-8MI runs directly from two alkaline cells or a single Li-SOCl2 cell without a boost converter, maximizing energy efficiency in portable measurement instruments. AVR sleep modes (idle and power-down) let the instrument spend most of its life drawing microamp-level current, waking on USART, timer, or external interrupt for a measurement burst at up to 8MHz. The 512B EEPROM stores calibration constants across power cycles without external nonvolatile memory, and TWI connects low-power sensors. According to Microchip's datasheet, the enhanced RISC core achieves roughly 1 MIPS per MHz, so designers can clock down and further reduce energy per task in battery-critical designs.
Recommended
Building Automation Nodes
Building automation nodes such as lighting controllers, damper actuators, and room controllers benefit from the ATMEGA162V-8MI's combination of TWI (I2C) for sensors, SPI for peripherals, and two USARTs for network uplink and commissioning access. PWM-capable timers drive LED dimming and small actuator motors directly, and the Watchdog Timer plus Brown-out Reset guarantee deterministic recovery after utility power disturbances - essential in large deployed fleets that cannot be serviced individually. The industrial temperature rating covers rooftop and mechanical-room installations. The 16KB Flash accommodates a lightweight protocol stack plus application logic, and ISP Flash programming permits firmware updates in the field without removing the MCU from the mounted PCB.
Recommended
Embedded Training and Prototyping
The ATmega162 family is a classic platform for embedded systems education and prototyping because it exposes all fundamental MCU concepts - GPIO, timers, PWM, interrupts, two UARTs, SPI, and TWI - in one approachable 8-bit AVR with single-cycle instruction execution. The 16KB ISP Flash erases and reprograms thousands of times (10,000-cycle endurance per Microchip's datasheet), tolerating heavy student iteration. The ATMEGA162V-8MI's QFN package suits final student and startup boards, while same-die DIP variants such as the ATMEGA162-16PU allow breadboard prototyping of identical firmware. Cross-migrating between the DIP prototype and the QFN production part requires no code changes, shortening the path from concept to a solderable, compact product design.
Recommended
Motor Control and PWM Actuation
The ATMEGA162V-8MI integrates two 8-bit and one 16-bit timer with PWM outputs, enabling direct control of DC motor drivers, servo signals, and LED intensity without external PWM ICs. The 8MHz clock yields 8-bit PWM resolution at approximately 31 kHz, above audible range for fan and pump control, while the 16-bit timer supports precise servo positioning. The Watchdog Timer provides a safety net for actuator applications - if firmware stalls while a motor is energized, the WDT resets the MCU to a defined state. Combined with BOD protection against browned-out supplies, this makes the part dependable in appliances, HVAC dampers, and small conveyor drives where the MCU alone supervises actuation safety.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA162V-8MI β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA162V-8MU | ATMEGA162V-8MC | ATMEGA162-16MU |
|---|---|---|---|---|
| Package | 44-VQFN (7x7 mm) MLF, Exposed Pad | 44-VQFN (7x7 mm) MLF - same | 44-VQFN (7x7 mm) MLF - same | 44-VQFN (7x7 mm) MLF - same |
| Brand | Microchip Technology (Atmel) | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Clock Frequency | 8 MHz | 8 MHz | 8 MHz | 16 MHz |
| Operating Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 4.5 V to 5.5 V |
| Flash Memory | 16 KB | 16 KB | 16 KB | 16 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB |
| Temperature Range | -40C to +85C (Industrial) | 0C to +70C (Commercial) | 0C to +70C (Commercial) | 0C to +70C (Commercial) |
| USARTs | 2 | 2 | 2 | 2 |
Key Differentiators
- Dual USARTs in an 8-bit MCU (vs ATMEGA16-16AU)
- Wide 1.8V-5.5V low-voltage operation (vs ATMEGA162-16MU)
- Industrial temperature rating for harsh environments (vs ATMEGA162V-8MU)
- 100% pin compatibility with ATmega161 legacy designs (vs ATMEGA161L-4PI)
Design Notes
Respect the speed-vs-voltage envelope of the V grade: the ATMEGA162V-8MI is specified for 0-8MHz across 1.8V-5.5V per the ATmega162 datasheet, but it must not be overclocked. When the board may be populated with the ATMEGA162-16MU as a 5V upgrade path, design the power tree for 5V and keep BOD thresholds configured appropriately for the fitted part. Place a 100nF ceramic decoupling capacitor directly across VCC/GND pads plus 10uF bulk, and bond the exposed pad to ground for both thermal and return-current integrity.
The 44-pad MLF/QFN footprint requires via-in-pad or perimeter vias under the exposed pad to reach the ground plane; without them, the thermal relief and ground reference the BOD and ADC share degrade. Use non-solder-mask-defined (NSMD) pads per Microchip MLF application guidance and verify paste stenciling on the center pad to prevent floating (which causes intermittent grounds) or excessive solder (which lifts the package and opens perimeter joints).
Because the ATmega162 is 100% pin compatible with ATmega161 (per Microchip's datasheet), legacy boards may swap parts - but fuse bit locations and electrical characteristics differ between the two devices, so re-verify fuse settings and BOD configuration after any family substitution. Also note the 'V' grade caps frequency at 8MHz; code written assuming a 16MHz F_CPU from ATMEGA162-16 parts will run at half speed on this device - adjust F_CPU and UART baud register calculations.
When both USARTs run at high baud rates in converter applications, route the TX/RX pairs away from the XTAL lines and add series termination (22-33 ohm) on long RS-485 traces to reduce ringing and radiated emissions. The internal RC oscillator option reduces BOM cost but is less accurate; for reliable multi-drop UART communication, use an external crystal so baud error stays within the approximately 2% tolerance budget of the receivers.
Compliance Information
Compliance attributes were not stated in the verified web data; confirm RoHS/REACH status from the official Microchip product page or certificate of conformance before procurement.
