ATMEGA169V-1AC - 8-bit AVR MCU, 16KB Flash, LCD Driver | Microchip
MPN: ATMEGA169V-1AC β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.2 | $6.20 |
| 10 | $5.58 | $55.80 |
| 100 | $4.96 | $496.00 |
| 500 | $4.45 | $2,225.00 |
| 1,000 | $3.98 | $3,980.00 |
ATMEGA169V-1AC Overview
An AVR microcontroller is an 8-bit MCU family built on an enhanced RISC architecture in which most of the 130 instructions execute in a single clock cycle, placing it in the broader hierarchy of embedded microcontrollers within the semiconductor device family. ATmega devices combine program Flash, data SRAM, and EEPROM on one die with peripheral sets such as ADCs, timers, UARTs, and SPI.
Key features of the ATMEGA169V-1AC include 16KB (8K x 16 organization) In-System Self-Programmable Flash, an 8-channel 10-bit ADC, a JTAG interface for on-chip debugging and boundary scan, and the distinguishing 4x25 segment LCD controller that few 8-bit MCUs integrate on-chip. The V suffix denotes the low-voltage operating grade, making it suitable for battery-powered instruments where 1.8V operation extends cell life.
Architecturally, the device uses a Harvard-structure AVR core with 32 general-purpose working registers directly connected to the ALU, allowing single-cycle arithmetic between registers. Self-programming Flash enables boot-loader firmware updates in the field, and the JTAG port supports on-chip debug without additional external emulators.
Typical applications include battery-operated meters with LCD displays, handheld instruments, utility metering, and industrial panels where the integrated LCD driver removes the need for an external segment driver.
Design consideration: verify the maximum clock frequency against the actual supply voltage, because the V-grade frequency derates at the low end of the supply range.
This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATMEGA169V-1AC 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 ATMEGA169V-1AC (same form factor and footprint) β differing in Debug Interface, Flash Program Memory, Instructions, Series, Throughput.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATMEGA169PV-8AUR
β Drop-Inβ In Stock
$4.16 / Unit
View Datasheet βATMEGA169P-15AT
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$3.6 / Unit
View Datasheet βATMEGA169PA-AUR
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA169V-8AU
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA169A-AUR
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA169V-1AC Maximum Ratings & Electrical Characteristics
| Core | AVR 8-bit RISC |
| Core Size | 8-Bit |
| Speed (Max Clock) | 1 MHz (V grade) |
| MIPS Throughput | up to 16 MIPS at 16 MHz (family rating) |
| Flash Program Memory | 16 KB (8K x 16), self-programming |
| SRAM | 1 KB |
| EEPROM | 512 B |
| ADC | 8-channel, 10-bit |
| LCD Driver | 4 x 25 segment, integrated |
| Debug Interface | JTAG for on-chip-debug |
| Instruction Set | 130 powerful instructions, most single-cycle |
| Package | 64-TQFP (14 x 14 mm) |
| Mounting Type | Surface Mount |
| Number of Terminals | 64 |
| Terminal Form | Gull Wing |
| Package Shape | Square TQFP |
| Temperature Grade | Commercial |
| Standard Package Quantity | 160 |
ATMEGA169V-1AC 160 Pin Configuration Guide
Pin configuration for ATMEGA169V-1AC (160 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-1AC.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA169V-1AC is suitable for 6 applications: Battery-Powered Utility Metering, Handheld Test Instruments, Industrial Control Panels with LCD, Thermostats and HVAC Controllers, Consumer Appliance Displays, Portable Medical and Wellness Devices.
Battery-Powered Utility Metering
The ATMEGA169V-1AC fits utility meters (electricity, water, heat) because it combines the measurement ADC and the display path in one low-power device. The 8-channel 10-bit ADC samples sensor or shunt signals, while the integrated 4x25 segment LCD driver renders the consumption readout without an external LCD controller, reducing board area and quiescent drain. The V low-voltage grade supports operation from battery stacks, and 512B EEPROM stores tariff tables and accumulated counters across power cycles. A typical topology runs the core from a low-speed crystal with periodic ADC bursts, letting the self-programming Flash hold a boot loader for field firmware updates during meter recalibration.
Recommended
Handheld Test Instruments
Handheld multimeters, thermometers, and panel testers benefit from the ATMEGA169V-1AC's single-chip integration of measurement and display functions. The 10-bit ADC with 8 input channels multiplexes across probe inputs and battery-monitor nodes, while the 4x25 LCD driver shows readings and unit indicators on a custom segment glass. Because the AVR core executes most of its 130 instructions in one cycle, averaging and scaling math run quickly at modest clock rates, preserving battery life. The JTAG interface enables on-chip-debug during calibration firmware development, and 16KB Flash accommodates calibration tables plus multi-range measurement routines in a compact code footprint.
Recommended
Industrial Control Panels with LCD
Industrial panel controllers use the ATMEGA169V-1AC to combine status indication and control logic on one chip. Its 64-pin TQFP provides abundant port pins (PA through PG) for relays, encoder inputs, and limit switches, while the LCD driver displays setpoints, fault codes, and menu text on a segment glass. The 10-bit ADC reads potentiometer setpoints and analog sensor loops, and 1KB SRAM supports small state machines and communication buffers. The V-grade low-voltage operation tolerates battery-backed supplies during brownouts. The self-programming Flash allows in-field firmware updates through the boot loader, avoiding panel teardown when control logic changes are required by the process.
Recommended
Thermostats and HVAC Controllers
HVAC thermostats are a classic ATmega169 application: the 4x25 LCD driver renders temperature, mode, and schedule icons, the 10-bit ADC digitizes NTC thermistor and room-sensor inputs, and port pins drive relay or TRIAC outputs for heating and cooling stages. The ATMEGA169V-1AC's low-voltage V grade runs from 2xAA or lithium cells for seasons of service, and 512B EEPROM retains user schedules and setpoints across battery replacement. Timer peripherals generate precisely timed relay switching and backlight pulses. Firmware in 16KB Flash typically includes PID loops, scheduling, and a simple push-button menu, all debuggable through JTAG during development.
Recommended
Consumer Appliance Displays
Microwave ovens, coffee machines, and white-goods control boards historically used the ATmega169 family precisely because of its on-chip LCD driver. The ATMEGA169V-1AC drives the custom segment glass showing time, mode, and progress indicators while managing touch buttons through ADC-based or digital key scanning, and controlling triacs or relays for heaters and motors. The 64-pin TQFP supplies enough I/O to interface door sensors, buzzer, and communication lines without external expansion. Its self-programming Flash supports manufacturing-line firmware programming, and the JTAG port allows boundary-scan-based production test of board interconnects, improving first-pass yield on cost-sensitive appliance assemblies.
Recommended
Portable Medical and Wellness Devices
Portable diagnostic accessories such as glucose loggers, thermometers, and pulse indicators use the ATMEGA169V-1AC where a segment LCD, ADC front end, and long battery life must coexist cheaply. The 8-channel 10-bit ADC reads sensor bridges and battery voltage; the LCD driver displays readings and low-battery icons; and EEPROM stores recent measurement history for later retrieval. The V-grade low-voltage rating extends operation as cells discharge, an important safety and usability factor in medical accessories. Note that for mains-connected or patient-connected equipment, isolation and IEC compliance must be addressed at system level; the MCU itself supports the low-power display-and-measure core of the design.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA169V-1AC β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA169PV-8AUR | ATMEGA169P-15AT | ATMEGA169PA-AUR | ATMEGA169V-8AU |
|---|---|---|---|---|---|
| Package | 64-TQFP (14x14 mm) | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same | 64-TQFP (14x14 mm) - same |
| Brand | Microchip Technology (Atmel) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16 KB self-programming | 16 KB | 16 KB | 16 KB | 16 KB |
| SRAM / EEPROM | 1 KB / 512 B | 1 KB / 512 B | 1 KB / 512 B | 1 KB / 512 B | 1 KB / 512 B |
| LCD Driver | 4 x 25 segments | 4 x 25 segments | 4 x 25 segments | 4 x 25 segments | 4 x 25 segments |
| Die / Power Class | Original ATmega169 die | P die (power-optimized) | P die (power-optimized) | P-A die (latest, lowest power) | Original V die |
| ADC | 8-channel 10-bit | 8-channel 10-bit | 8-channel 10-bit | 8-channel 10-bit | 8-channel 10-bit |
Key Differentiators
- Integrated 4x25 segment LCD driver (vs ATMEGA168PB-AUR)
- 64-pin TQFP with larger I/O count (vs ATMEGA168-20AU)
- Lower cost at equivalent memory vs P-die parts (trade-off: higher power) (vs ATMEGA169PV-8AUR)
Design Notes
Verify the speed-versus-voltage operating envelope before clocking the ATMEGA169V-1AC above its 1 MHz V-grade rating. The V suffix denotes the low-voltage grade, and the maximum safe frequency derates as supply voltage decreases; running at full family speed (up to 16 MHz per the datasheet) is only valid at the high end of the supply range. Consult the speed-grade curve in the ATmega169 datasheet and derate the system clock or add a supply supervisor if brownouts are possible.
For battery products, strongly evaluate the P-die family members (ATMEGA169PV-8AUR, ATMEGA169PA-AUR) as drop-ins: the P die reduces active and idle current versus the original ATmega169 die in the ATMEGA169V-1AC. Because all variants share the 64-TQFP footprint and peripheral set, switching die revisions usually requires only firmware re-validation of clock and LCD timing, not a PCB respin. Budget LCD drive current as well - the segment LCD driver consumes meaningful current based on frame frequency and the number of active segments.
Use the 64-TQFP (14x14 mm) footprint with exposed gull-wing leads and give the device a solid ground plane. Decouple VCC and AVCC independently with 100 nF ceramic capacitors placed at the pins, and connect AVCC to a quiet supply rail for best 10-bit ADC performance - a ferrite bead from the digital rail to AVCC is a common proven pattern. Route LCD segment traces away from the ADC inputs and crystal lines to avoid coupling display drive artifacts into measurements.
The JTAG interface shares pins with port C, so if JTAG is enabled it constrains those I/O. Disable JTAG via fuse in production firmware if the application needs all port-C pins, and note that the JTAG-into-system-programming option must be considered when selecting ISP versus JTAG programming in-circuit. Keep the JTAG connector footprint populated (even if the header is not installed) during development for on-chip-debug access.
Compliance Information
Compliance status not explicitly stated in the verified data for this legacy Atmel-era part number; request a material declaration or certificate of conformance from Microchip or your distributor.