ATMEGA162V-8MU - 8-bit AVR MCU 16KB Flash 8MHz VQFN-44 | Microchip
MPN: ATMEGA162V-8MU ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.43 | $6.43 |
| 10 | $6.11 | $61.10 |
| 100 | $5.79 | $579.00 |
| 500 | $5.47 | $2,735.00 |
| 1,000 | $5.15 | $5,150.00 |
ATMEGA162V-8MU Overview
An AVR microcontroller is a class of 8-bit reduced-instruction-set (RISC) MCUs in the broader microcontroller and embedded processor hierarchy. AVR cores execute most instructions in a single clock cycle, and the ATmega162 implements 133 powerful instructions with 32 general-purpose working registers directly connected to the ALU, giving throughput of up to 16 MIPS at 16 MHz on faster speed grades of the same family.
Key features of the ATMEGA162V-8MU include the JTAG interface for on-chip debugging and boundary-scan, two full-duplex hardware USARTs for multi-channel serial communication, and the extended low-voltage V-grade operation from 1.8V down to 5.5V, which supports battery-powered designs that must survive deep battery discharge. Flash endures in-system reprogramming, while 512B of EEPROM retains calibration data through power cycles.
Architecturally, the ATmega162 uses a Harvard-structure memory map with separate program and data buses, single-cycle ALU operations, and an on-chip bootloader section that lets the device reprogram its own flash over either USART. Peripheral set includes an 8-channel 10-bit ADC, two 8-bit timers, a 16-bit timer, PWM outputs, an analog comparator, and an SPI interface.
Typical applications include industrial control panels requiring dual UARTs, battery-powered instruments exploiting the 1.8V V-grade supply range, and legacy ATmega161 board migrations, since the datasheet states the ATmega162 is 100% pin compatible with the ATmega161.
Design consideration: the V-grade device is limited to 8 MHz maximum clock; if your board runs above 8 MHz, select a 16 MHz speed grade instead.
This page synthesizes verified distributor pricing, drop-in family alternatives, pinout resources, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for ATMEGA162V-8MU — 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-8MU (same form factor and footprint) — differing in Package, Core Architecture, EEPROM, SRAM, Supply Voltage Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATMEGA162V-8AUR
✅ Drop-In✓ In Stock
$6.62 / Unit
View Datasheet →ATMEGA162V-8MI
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →ATMEGA162L-8MC
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →ATMEGA162V-1MC
✅ Drop-In✓ In Stock
$3.95 / Unit
View Datasheet →ATMEGA162V-8MU Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit AVR RISC |
| Flash Memory | 16KB (8K x 16) |
| SRAM | 1KB |
| EEPROM | 512B |
| Maximum Clock Frequency | 8 MHz |
| Supply Voltage Range | 1.8 V to 5.5 V |
| I/O Ports / Lines | 53 I/O |
| Instruction Count | 133 instructions |
| Timers | Two 8-bit, one 16-bit |
| ADC | 10-bit |
| USART | Two full-duplex USARTs |
| Debug Interface | JTAG (on-chip debug, boundary scan) |
| Package | 44-VQFN (7x7 mm) with exposed pad |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Pin Compatibility | 100% pin compatible with ATmega161 |
ATMEGA162V-8MU 44-vqfn (7x7 mm) with exposed pad Pin Configuration Guide
Pin configuration for ATMEGA162V-8MU (44-vqfn (7x7 mm) with 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-8MU.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA162V-8MU is suitable for 6 applications: Industrial Control and Automation Panels, Battery-Powered Portable Instruments, Dual-UART Communication Gateways, Legacy ATmega161 Board Migration, Embedded Debug and Training Systems, Motor Control and PWM Actuation.
Industrial Control and Automation Panels
The ATMEGA162V-8MU fits industrial control panels because its two full-duplex USARTs allow simultaneous communication with a host PLC or SCADA link and a local HMI or RS-485 device without software serial bit-banging, which would otherwise steal CPU cycles from the control loop. The 133-instruction AVR RISC core executing most instructions in one cycle delivers deterministic 8 MIPS-class throughput at 8 MHz for scanning 53 I/O lines. JTAG on-chip debugging lets field firmware be diagnosed in-system, and 512B EEPROM retains setpoints through power loss. Run it at 5V for noise immunity; the 16KB flash accommodates bootloader plus protocol stacks for Modus-style UART implementations.
Recommended
Battery-Powered Portable Instruments
Battery instruments benefit directly from the V speed grade of the ATMEGA162V-8MU: the 1.8V minimum supply means the MCU keeps running as cells discharge far below the 2.7V floor required by L-grade parts, extending usable battery life rather than brown-out resetting near end of charge. The 10-bit ADC digitizes sensor inputs without an external converter, and AVR power-management sleep modes cut quiescent draw between measurement bursts. The 8 MHz ceiling is usually not a constraint in battery designs, where the clock is often reduced for efficiency. The 44-VQFN 7x7 mm exposed-pad package provides a compact, thermally efficient footprint for handheld enclosures.
Recommended
Dual-UART Communication Gateways
The defining peripheral of the ATmega162 family is its pair of independent, full-duplex hardware USARTs, making the ATMEGA162V-8MU a natural protocol gateway: one UART interfaces upward to a Modbus RTU master or PC while the second services a device-level RS-232/RS-485 bus. Hardware framing and error detection in both USARTs offload the CPU, and the 8 MHz V-grade clock sustains typical 9600-115200 baud traffic on both ports simultaneously with headroom for application logic. The SPI interface and 53 I/O lines let the gateway also bridge to local sensors or relay banks, and the bootloader section supports field firmware updates over the uplink UART.
Recommended
Legacy ATmega161 Board Migration
Per the Microchip ATmega162 datasheet, the ATmega162 is 100% pin compatible with the ATmega161 and can replace it on existing printed circuit boards - a documented, sanctioned migration path for aging designs. The ATMEGA162V-8MU therefore lets manufacturers of ATmega161-based equipment re-source a dropped or scarce die onto the same land pattern with identical pinout, while gaining the larger ATmega162 peripheral set. Two documented caveats require attention during migration: fuse bit locations differ between the two devices, and electrical characteristics differ, so re-verify clock fuses, brown-out thresholds, and timing margins in the migrated firmware image.
Recommended
Embedded Debug and Training Systems
The JTAG interface of the ATMEGA162V-8MU provides both on-chip debugging and boundary-scan, which makes the device attractive for embedded training platforms and development fixtures where students or engineers need breakpoint, single-step, and register/memory visibility without instrumented firmware. Tools such as the Atmel-ICE attach to the shared JTAG/programming port, and the same port programs the 16KB flash, keeping the target board header count minimal. The generous 53 I/O lines let trainers expose peripherals - LED banks, keypads, LCDs - directly, while the dual USARTs support serial lab exercises alongside the debugger.
Recommended
Motor Control and PWM Actuation
The ATMEGA162V-8MU pairs its two 8-bit timers and one 16-bit timer with PWM outputs suited to DC motor speed control, servo actuation, and LED dimming in appliances and small machinery. Running the V grade at 5V/8 MHz gives fast PWM resolution while the 10-bit ADC reads back current-sense or potentiometer feedback for closed-loop trimming, and the analog comparator supports zero-cross or over-current trip functions with minimal external parts. The 53 I/O lines drive H-bridge direction and enable signals directly. The exposed-pad VQFN-44 aids heat spreading when the board also carries driver transistors nearby.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA162V-8MU — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA162V-8AUR | ATMEGA162V-8MI | ATMEGA162L-8MC | ATMEGA162V-1MC |
|---|---|---|---|---|---|
| Package | 44-VQFN (7x7 mm) exposed pad | 44-VQFN (7x7 mm) exposed pad - same | 44-VQFN (7x7 mm) exposed pad - same | 44-VQFN (7x7 mm) exposed pad - same | 44-VQFN (7x7 mm) exposed pad - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16KB | 16KB | 16KB | 16KB | 16KB |
| SRAM / EEPROM | 1KB / 512B | 1KB / 512B | 1KB / 512B | 1KB / 512B | 1KB / 512B |
| Maximum Clock | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 1 MHz |
| Minimum Supply Voltage | 1.8 V | 1.8 V | 1.8 V | 2.7 V | 1.8 V |
| JTAG Debug | Yes | Yes | Yes | Yes | Yes |
| Pin Compatibility | ATmega162 family / ATmega161 | Pin-to-pin drop-in | Pin-to-pin drop-in | Pin-to-pin drop-in | Pin-to-pin drop-in |
Key Differentiators
- Dual hardware USARTs in a 44-pin package (vs ATMEGA16-16AU)
- Deep-discharge battery operation down to 1.8V (vs ATMEGA162L-8MC)
- Documented ATmega161 migration path (vs ATMEGA161L-4PI)
- Trade-off: 8 MHz ceiling on V grade (vs ATMEGA162-16PI)
Design Notes
Respect the V speed-grade clock limit: the ATMEGA162V-8MU is qualified for a maximum 8 MHz, not the 16 MHz of the standard grade. Overclocking a V-grade part above 8 MHz violates the datasheet timing and electrical characteristics and may fail only at temperature or voltage corners. If your application needs 16 MIPS-class throughput at 5V, switch the BOM to a 16-grade family member instead of raising the crystal frequency. Also remember that migrating from ATmega161 requires re-verifying fuse bit locations and electrical characteristics, as the datasheet explicitly flags these differences.
The 44-VQFN 7x7 mm package includes an exposed pad on the underside that must be soldered to a grounded copper keep-out area for mechanical reliability and thermal dissipation; an unsoldered exposed pad is a common cause of intermittent ground faults in VQFN designs. Place 100 nF ceramic decoupling capacitors within a few millimeters of each VCC/GND pin pair, and route the JTAG (TCK/TMS/TDO/TDI) header traces with a series resistor on TCK if the header is more than roughly 10 cm from the MCU to preserve signal integrity on the debug port.
Exploit the 1.8V floor deliberately: if the board is battery powered, size your brown-out detector (BOD) fuse setting to the V-grade curve rather than borrowing settings from L- or standard-grade designs, because valid BOD thresholds differ with the wider 1.8V to 5.5V operating window. At 5V, unused GPIO should be configured as inputs with internal pull-ups or driven outputs rather than left floating, which is the classic AVR excess-current pitfall; the 53 I/O lines make this easy to overlook on the ATmega162.
Compliance Information
RoHS compliant per distributor listings (DigiKey/Mouser). AEC-Q100 applies to the -A grade variant (e.g., ATMEGA162V-8AUR), not this commercial part. REACH and conflict-minerals status not stated in provided data.
