ATMEGA162V-8MJ - AVR 8-bit MCU 8MHz 16KB Flash VQFN-44 | Microchip
MPN: ATMEGA162V-8MJ β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
ATMEGA162V-8MJ Overview
An 8-bit AVR ATmega microcontroller is a reduced-instruction-set (RISC) embedded processor from Microchip's AVR family. The AVR architecture executes most of its 131 powerful instructions in a single clock cycle, achieving up to 16 MIPS throughput at 16 MHz in the family and roughly 8 MIPS at the 8 MHz speed grade of this part, placing it in the broader hierarchy of microcontrollers -> embedded processors -> semiconductors used in cost-sensitive embedded control systems.
Key features include 35 programmable I/O lines, two USARTs (UART0 and UART1) for dual serial channels, an SPI serial interface, a dual-buffered 16-bit Timer/Counter1 plus an 8-bit Timer/Counter0 and Timer/Counter2 with PWM outputs, an analog comparator, and internal RC oscillator options. Five sleep modes (Idle, Power-save, Power-down, Standby, and Extended Standby) support aggressive low-power design, and the JTAG interface enables on-chip debug plus boundary-scan testing.
Technically, the device uses the advanced AVR RISC Harvard architecture with 8 general purpose working registers, fully static operation, and a single-cycle ALU. Flash memory is self-programming through the boot loader section, allowing field firmware updates via the SPI or JTAG programming interfaces. The wide 1.8V to 5.5V operating range distinguishes the ATmega162V variant from the standard ATmega162 (2.7V to 5.5V, up to 16 MHz), making the V version suitable for battery-powered designs.
Typical applications include industrial control nodes, dual-UART communication gateways, battery-powered instrumentation, and consumer embedded systems that require legacy AVR code compatibility.
For design, leverage the exposed pad of the 44-VQFN package as a ground connection to improve thermal and EMC performance, and observe the 8 MHz maximum clock limit across the full 1.8V supply range.
This page synthesizes distributor availability data, drop-in alternatives, and practical design notes beyond what the manufacturer datasheet provides.
Drop-in alternatives for ATMEGA162V-8MJ 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-8MJ (same form factor and footprint) β differing in Core Architecture, Debug Interface, Maximum Clock Frequency, Package, Timers.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATMEGA162V-8MUR
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA162V-8MC
β Drop-Inπ Reference alternative (not in catalog)
ATMEGA162-16MJ
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$2.04 / Unit
View Datasheet βATMEGA16-16MJ
β Drop-Inβ In Stock
$3.72 / Unit
View Datasheet βATMEGA162V-8MJR
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA162V-8MJ Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit AVR RISC |
| Program Memory (Flash) | 16 KB (8K x 16) |
| SRAM | 1 KB |
| EEPROM | 512 B |
| Maximum Clock Frequency | 8 MHz |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Number of I/O Lines | 35 |
| USART Channels | 2 |
| Timers | One 16-bit (dual-buffered), two 8-bit with PWM |
| Debug Interface | JTAG (on-chip debug, boundary scan) |
| Programming Interfaces | SPI ISP, JTAG, boot loader (self-programming Flash) |
| Sleep Modes | Idle, Power-save, Power-down, Standby, Extended Standby |
| Analog Features | Analog comparator, internal RC oscillator |
| Package | 44-VQFN (7x7 mm) exposed pad (MLF) |
| Mounting Type | Surface Mount |
| Series | AVR ATmega |
| Operating Voltage Family | ATmega162V (1.8V - 5.5V) |
ATMEGA162V-8MJ 44-vqfn (7x7 mm) exposed pad (mlf) Pin Configuration Guide
Pin configuration for ATMEGA162V-8MJ (44-vqfn (7x7 mm) exposed pad (mlf) 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-8MJ.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA162V-8MJ is suitable for 6 applications: Industrial Control Nodes, Dual-UART Communication Gateways, Battery-Powered Instruments, Embedded Firmware Upgrade Systems, Consumer Appliance Control, Legacy AVR Design Continuity.
Industrial Control Nodes
The ATMEGA162V-8MJ fits industrial control and automation nodes that need deterministic 8-bit control, several PWM or timer outputs, and solid serial connectivity. Its 35 programmable I/O lines directly drive relays, optocouplers, and status LEDs without port expanders, while the 16-bit dual-buffered Timer/Counter1 generates glitch-free PWM for actuators. The wide 1.8V to 5.5V supply range tolerates unregulated industrial auxiliaries, and JTAG boundary-scan supports production board testing of the dense 44-VQFN assembly. In a typical node the MCU polls sensors over SPI, executes the control loop at 8 MHz (roughly 8 MIPS per the AVR single-cycle instruction set), and reports status over one USART while the second USART connects a service console - all within a 7x7 mm footprint that suits compact DIN-rail or embedded controller boards.
Recommended
Dual-UART Communication Gateways
With two independent USARTs, the ATMEGA162V-8MJ is a natural protocol bridge: one port links to an RS-485 field bus or modem while the second serves a console, logger, or secondary device. Each USART supports asynchronous and synchronous modes per the Microchip datasheet, and the 1KB SRAM provides adequate buffering for packet assembly at typical 9600-115200 baud rates. The 8 MHz clock delivers about 8 MIPS, enough to run lightweight framing, CRC checks, and dispatch code concurrently on both channels. Because the 44-pad VQFN package is common to the whole ATmega162 family, a gateway can be scaled up to the 16 MHz ATMEGA162-16MJ without PCB changes when throughput demands grow. The wide 1.8-5.5V input range also allows direct operation from 3.3V logic rails without level-shifting.
Recommended
Battery-Powered Instruments
The ATMEGA162V-8MJ's 1.8V minimum supply is the headline feature for battery instruments: it runs from two alkaline cells or a discharging lithium cell across the full 8 MHz speed grade, unlike the 2.7V-limited ATMEGA162 variants. Five sleep modes - Idle, Power-save, Power-down, Standby, and Extended Standby - let firmware cut average current to microamp levels between measurements, waking on external interrupts or timer overflow. The analog comparator supports zero-power threshold detection, and the internal RC oscillator removes the cost of an external crystal in cost-sensitive meters. The 512B EEPROM retains calibration constants through battery replacement, and the 7x7 mm VQFN keeps the PCB small for handheld enclosures. A typical design sleeps in Power-down, wakes on a key press, measures, computes, and returns to sleep within milliseconds.
Recommended
Embedded Firmware Upgrade Systems
The self-programming Flash of the ATMEGA162V-8MJ enables in-field firmware updates without a programmer attached: the boot loader section can rewrite the application section over either USART, over SPI, or through JTAG, per the Microchip ATmega162 datasheet. This suits products that must receive feature updates or security patches after deployment - gateways, controllers, and instrumentation. The dual-buffered Timer1 and 35 I/O lines allow the same chip to keep driving its control outputs while the update proceeds, minimizing downtime. Designers should reserve the boot loader section (configurable by fuse bits) and implement a watchdog-guarded update routine; the JTAG interface additionally provides a recovery path if the application image is corrupted. The 44-VQFN package keeps the whole update-capable system within a small board area.
Recommended
Consumer Appliance Control
For appliance control boards - timers, fan and pump drives, user interfaces - the ATMEGA162V-8MJ combines classic AVR reliability with the I/O count of a 44-pin device. The 35 I/O lines drive a segment LCD driver chain, matrix keypad scanning, and buzzer outputs directly; two 8-bit timers plus the 16-bit Timer1 with PWM manage motor and heater control with hardware independence from the CPU load. The internal RC oscillator eliminates a crystal in cost-driven designs where timing precision permits, and the 1.8V to 5.5V range simplifies power-tree choices between 3.3V and 5V boards. The exposed-pad 44-VQFN (7x7 mm) package supports compact single-sided control PCBs. JTAG boundary scan is valuable here because appliance boards are assembled in volume and benefit from automated interconnect test.
Recommended
Legacy AVR Design Continuity
Many long-lifecycle products - test equipment, building controls, industrial retrofits - were built around classic ATmega devices, and the ATMEGA162V-8MJ preserves that investment. Code written for the ATmega16 ports with minimal changes to the ATmega162, gaining a second USART and dual-buffered Timer1 in the same 44-pad VQFN footprint; ATMEGA16-16MJ is in turn a fallback where those added peripherals are unused. The 44-pin MLF-to-TQFP/PDIP package options (ATMEGA162V-8AUR, ATMEGA162V-1PC) let the same firmware migrate between prototyping and production formats without register-map changes. For lifecycle-sensitive procurement, qualifying this MPN plus its same-footprint alternatives creates a multi-source buffer within Microchip's catalog, mitigating allocation risk on a legacy controller that still ships today.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA162V-8MJ β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA162V-8MUR | ATMEGA162V-8MC | ATMEGA162-16MJ | ATMEGA16-16MJ |
|---|---|---|---|---|---|
| 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 | 44-VQFN (7x7 mm) MLF - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16 KB (8K x 16) | 16 KB | 16 KB | 16 KB | 16 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| Maximum Clock Frequency | 8 MHz | 8 MHz | 8 MHz | 16 MHz | 16 MHz |
| USART Channels | 2 | 2 | 2 | 2 | 1 |
| JTAG Debug | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Widest voltage range in the ATmega162 family (vs ATMEGA162-16MJ)
- Dual USARTs vs single-UART classic AVR (vs ATMEGA16-16MJ)
- Lead-free sourcing path on the same footprint (vs ATMEGA162V-8MUR)
Design Notes
The 44-pad VQFN/MLF package has an exposed pad on the underside that must be soldered to a grounded copper pour. Per Microchip MLF application guidance, design an aperture-matched thermal pad on the PCB with a 3x3 to 4x4 via array (0.3 mm drill) to the ground plane; this provides both the ground return for the internal core and improved thermal/EMC performance. Verify your assembler can handle the 0.5 mm pitch - standard reflow is fine, but hand rework of the center pad requires care.
The V speed grade is the reason to choose this part: it sustains full 8 MHz operation down to 1.8V, per the ATmega162 datasheet speed/voltage curves. If your rail is a lithium cell discharging toward 3.0V or lower, confirm Brown-out Detector fuse settings (BODLEVEL) so the MCU resets cleanly rather than executing corrupted code during brown-out. For 5V systems, decouple VCC pins with 100 nF ceramics placed within 5 mm of each supply pad plus one bulk 10 uF per board.
The JTAG pins (shared with port C) are enabled by default via fuse; on boards needing all port C pins for I/O, disable JTAGEN or use the JTD bit in MCUCSR. Also note the 8 MHz ceiling is absolute for the V part - never fit a crystal above 8 MHz even at 5V, or use ATMEGA162-16MJ instead (which requires VCC >= 2.7V). Finally, this J-suffix part carries SnPb lead finish; check your product's RoHS obligations before specifying it for new lead-free production.
Compliance Information
The 'J' suffix in Atmel/Microchip ordering convention denotes tin-lead (SnPb) lead finish, so this part is leaded - not suitable for RoHS-restricted new production. For lead-free, source ATMEGA162V-8MUR. Exact RoHS/REACH declarations for this order code were not present in the provided data.
