ATMEGA169V-8MU - 8-bit AVR MCU 16KB 64QFN | Microchip
MPN: ATMEGA169V-8MU 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 |
ATMEGA169V-8MU Overview
An 8-bit microcontroller is a complete computer system on a single chip that integrates a processor core, program memory, data memory, and peripherals such as timers, ADCs, and serial interfaces. Within the embedded systems hierarchy, the ATmega family sits in the general-purpose MCU category, positioned below 32-bit MCUs in processing power but excelling in simplicity, cost, and power efficiency for control-oriented tasks.
Key differentiating features include the AVR enhanced RISC architecture executing 131 mostly single-cycle instructions for up to 16 MIPS at 16 MHz (8 MIPS at the 8 MHz rating of this V-grade part), JTAG interface for on-chip debug and boundary-scan, and in-system self-programming Flash that enables field firmware updates. The V suffix denotes the low-voltage grade, supporting full functionality down to 2.7V for battery-powered designs.
Technically, the ATmega169 is a fully static CMOS design with an AVR core, 32 general-purpose working registers directly connected to the ALU, allowing one-cycle execution of most instructions. Peripheral set includes two 8-bit timers, one 16-bit timer, USART, SPI, two-wire interface, analog comparator, and the LCD controller variant heritage makes this family popular in segmented display applications.
Typical applications include battery-powered instruments, LCD-based consumer devices, industrial sensors, and hand-held meters where low-voltage operation and 64 I/O-rich pin count are required.
When designing with this device, account for the 8 MHz maximum clock of the V grade; designs needing 16 MHz operation should select the standard grade variant. Supply decoupling and proper JTAG fuse configuration are common integration points.
This page synthesizes distributor availability data, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, with pricing and stock referenced as of 2026-09-17.
Drop-in alternatives for ATMEGA169V-8MU β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATMEGA169PV-8MUR
β Drop-Inπ Reference alternative (not in catalog)
ATMEGA169PA-MUR
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA169A-MUR
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA169V-8MU Maximum Ratings & Electrical Characteristics
| Core Processor | AVR 8-bit RISC |
| Core Size | 8-bit |
| Max Clock Frequency | 8 MHz |
| Flash Program Memory | 16 KB (8K x 16) |
| SRAM | 1 KB |
| EEPROM | 512 B |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Supply Voltage - Operating | 2.5 V / 3.3 V / 5 V |
| ADC Resolution | 10-bit, 8 channels |
| Instructions | 131 instructions, most single-cycle |
| Throughput | Up to 16 MIPS at 16 MHz (8 MIPS at 8 MHz) |
| Debug Interface | JTAG (on-chip debug, boundary scan) |
| Package | 64-VFQFN (9x9 mm) with exposed pad |
| Mounting Type | Surface Mount |
| Timers | Two 8-bit, one 16-bit |
| Serial Interfaces | USART, SPI, 2-wire (I2C-compatible) |
ATMEGA169V-8MU 64-vfqfn (9x9 mm) with exposed pad Pin Configuration Guide
Pin configuration for ATMEGA169V-8MU (64-vfqfn (9x9 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 ATMEGA169V-8MU.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA169V-8MU is suitable for 6 applications: Battery-Powered Handheld Instruments, LCD-Based Consumer Devices, Industrial Sensor Nodes, Embedded Control and Automation, Metering and Data Loggers, Educational and Legacy AVR Platforms.
Battery-Powered Handheld Instruments
The ATMEGA169V-8MU fits battery-powered handheld instruments because its V-grade voltage range of 2.7V to 5.5V allows direct operation from two alkaline cells or a single lithium cell with a simple regulator, without losing the full 8 MHz performance. The 16KB Flash and 1KB SRAM provide sufficient program and data space for measurement firmware, calibration tables, and user interfaces, while the 512B EEPROM stores nonvolatile calibration constants across power cycles. The 8-channel 10-bit ADC reads multiple sensor inputs directly without an external converter, and the 10-bit resolution gives roughly 5 mV steps on a 5V reference - adequate for many metering tasks. In typical use, the MCU sleeps between readings with periodic timer wakeups; the AVR idle and power-down modes minimize average current draw, extending battery life in portable meters, testers, and diagnostic tools.
Recommended
LCD-Based Consumer Devices
The ATmega169 family is widely used in segmented-LCD consumer products, and the ATMEGA169V-8MU brings that heritage to designs needing a 64-pin, high-I/O package. The family's LCD-controller lineage means the device can drive display segments while its 1KB SRAM buffers display data and its 512B EEPROM retains user settings through power loss. The 2.7V to 5.5V supply range supports both battery and wall-adapter products, and the 8 MHz ceiling is sufficient for display refresh and keypad scanning, which are not computationally demanding. The USART and SPI interfaces link to external peripherals such as touch controllers or wireless modules. Because the part integrates JTAG on-chip debug, firmware teams can iterate on display-driving code efficiently. Segment-driven products such as kitchen timers, remotes, and small appliances benefit from the single-chip integration this device offers.
Recommended
Industrial Sensor Nodes
In industrial sensing nodes, the ATMEGA169V-8MU combines an 8-channel 10-bit ADC, SPI, and 2-wire interface in one package, allowing direct connection of analog sensors and digital peripherals such as external ADCs or EEPROM. The 5V operation range makes it compatible with legacy 24V industrial systems after simple conditioning, and the wide 2.7V floor supports 3.3V logic domains. The 16KB self-programmable Flash enables field firmware updates over the USART, an important maintenance feature for deployed nodes that are difficult to access. The 64-pin QFN exposes ample GPIO for valve drives, relays, and status indicators. Operating at 8 MIPS, the core handles sensor filtering and simple protocol stacks (Modus-style ASCII, custom polling) without a heavier processor. The exposed-pad QFN provides good thermal and ground performance for electrically noisy factory environments.
Recommended
Embedded Control and Automation
For embedded control tasks such as motor start circuits, sequencing logic, and small automation controllers, the ATMEGA169V-8MU provides deterministic single-cycle instruction execution that simplifies timing-critical code. Two 8-bit timers and one 16-bit timer generate PWM outputs and precise intervals without software overhead, while the analog comparator supports fast threshold detection for protection functions. The 8 MIPS throughput at 8 MHz is ample for state machines and simple PID loops. JTAG on-chip debug allows real-time register inspection during commissioning, reducing bring-up time versus simulation-only workflows. The 64-pin package supplies the GPIO count needed for keypad matrices, indicator banks, and limit-switch inputs in one MCU. Its 2.7V to 5.5V range allows the same firmware and PCB to serve both 3.3V and 5V product variants, consolidating inventory.
Recommended
Metering and Data Loggers
Energy, water, and process metering designs benefit from the ATMEGA169V-8MU's combination of self-programmable Flash and EEPROM. Logged data and running totals persist in the 512B EEPROM through power interruptions, while the 16KB Flash stores logging firmware and lookup tables for sensor linearization. The 10-bit ADC's eight channels allow simultaneous tracking of multiple analog inputs such as current-sense outputs, voltage dividers, and temperature sensors. The USART streams logged records to external storage or a host over RS-485-adjacent links, and the 2-wire interface connects real-time clocks for timestamping. Because the device is fully static, clock can be slowed or stopped without state loss, letting loggers spend most of their life in power-down with periodic wakeups. The exposed-pad QFN anchors a solid ground plane, important for ADC noise performance in precision counting applications.
Recommended
Educational and Legacy AVR Platforms
The ATmega169 remains a reference device in AVR education because its datasheet-documented JTAG debug interface and classic AVR architecture make fundamentals easy to demonstrate. The ATMEGA169V-8MU's 64-pin QFN supports both the full peripheral exploration and the higher I/O counts useful in lab exercise boards. The 131-instruction set with mostly single-cycle execution lets students connect assembly timing to measured behavior, while the C toolchain support (AVR-GCC) bridges to professional practice. The 2.7V to 5.5V operating range allows safe operation from bench supplies at common education voltages. Legacy designs already tooling the ATmega169 socket can continue production with the drop-in family variants listed on this page. Engineers maintaining Atmel-era products will find this part a straightforward continuity option backed by extensive community documentation and code examples.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA169V-8MU β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA169PV-8MUR | ATMEGA169PA-MUR | ATMEGA169A-MUR |
|---|---|---|---|---|
| Package | 64-QFN (9x9 mm) with exposed pad | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 16 KB | 16 KB | 16 KB | 16 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB |
| Max Clock Frequency | 8 MHz | 8 MHz | 16 MHz | 16 MHz |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| ADC | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels |
| Silicon Revision | Base (P family, V grade) | PV revision | PA revision (latest) | A revision |
Key Differentiators
- Low-voltage V-grade operation (vs ATMEGA169PA-MUR)
- Large 64-pin I/O count in QFN (vs ATMEGA168PA-MU)
- JTAG on-chip debug and boundary scan (vs ATMEGA169PV-8MUR)
Design Notes
The 64-VFQFN exposed pad must be soldered to a ground plane array for reliable grounding and thermal performance. Use a via-in-pad or perimeter via pattern (typically 3x3 or 4x4 via grid) connected to the internal ground layer. QFN paste printing on the exposed pad should use segmented stencil apertures (50-70% coverage) to prevent voiding and floating during reflow. Verify land pattern against Microchip's QFN-64 MLF application guidelines rather than generic footprints, as pad extensions affect self-alignment during reflow.
Decouple VCC and AVCC separately with 100 nF ceramic capacitors placed within 5 mm of the respective pins, plus a bulk 10 uF capacitor near the supply entry. AVCC powers the ADC and must be connected to VCC even if the ADC is unused, per the manufacturer datasheet. The 10-bit ADC benefits from a quiet AVCC: add an LC filter (10 uH inductor with 100 nF) between VCC and AVCC in measurement designs. Keep the AGND reference clean and route analog traces away from switching nodes.
JTAG fuse handling is the most common integration issue with this device: when the JTAGEN fuse is programmed, pins associated with JTAG (PC7-PC4 domain) are unavailable as general-purpose I/O. Programs that unprogram JTAGEN to recover I/O will lose debug access until a high-voltage parallel programmer is used. Also verify that the 8 MHz V-grade is not overclocked: running above 8 MHz violates the speed-voltage characterization of the V suffix and may cause marginal operation across temperature. Check crystal fuse settings (low-frequency crystal vs low-power crystal oscillator) when swapping silicon revisions.
Compliance Information
Compliance data not present in verified web data as of 2026-09-17. FindIC listing references GREEN classification for related ATmega169 parts, but explicit RoHS/REACH status for ATMEGA169V-8MU requires confirmation from Microchip product page.
