ATMEGA3290P-20AU Microchip Integrated Circuit (Quad Flat Packages) In Stock
The ATMEGA3290P-20AU is an 8-bit AVR RISC microcontroller running at up to 20 MHz with 32 KB Flash program memory, 2 KB SRAM, and 1 KB EEPROM. It offers 69 I/O lines, a 10-channel 10-bit ADC, SPI, I2C, USART, and integrated LCD driver in a 100-pin TQFP package. Wide supply range from 2.7 V to 5.5 V makes it suitable for battery-operated and 5 V industrial applications.
- Manufacturer
- Microchip
- Package
- Quad Flat Packages
- Pin Count
- 100
- Lifecycle
- ACTIVE
- Datasheet
- ATMEGA3290P-20AU Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $5.1870(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-bit AVR RISC core at up to 20 MHz clock frequency
- 32 KB in-system programmable Flash with 10,000 write/erase cycle endurance
- 2 KB SRAM and 1 KB EEPROM for data storage
- Integrated LCD driver supporting up to 4 x 25 segment displays
- 10-channel 10-bit ADC for analog signal acquisition
- Wide supply voltage: 2.7 V to 5.5 V with 2.7 V operation at 10 MHz
- 69 programmable I/O lines in 100-pin TQFP package
Applications
The ATMEGA3290P-20AU is ideal for portable consumer devices and industrial controllers requiring an integrated LCD segment display driver combined with ADC and serial communication peripherals in a single 8-bit microcontroller. It is used in utility meters, home automation panels, and medical handheld instruments where direct LCD driving eliminates the need for a separate display controller IC and reduces overall system cost. Battery-powered remote sensors and smart thermostats also benefit from its 2.7 V low-voltage operation mode, which extends battery life during low-frequency measurement tasks.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | TQFP-100 |
| Factory Lead Time | 8Weeks |
| YTEOL | 13 |
| Has ADC | YES |
| Additional Feature | ALSO OPERATES AT 2.7 V MINIMUM SUPPLY AT 10 MHZ |
| Bit Size | 8 |
| Boundary Scan | YES |
| CPU Family | AVR RISC |
| Clock Frequency-Max | 20MHz |
| DAC Channels | NO |
| DMA Channels | NO |
| Format | FIXED POINT |
| Integrated Cache | NO |
| JESD-30 Code | S-PQFP-G100 |
| JESD-609 Code | e3 |
| Low Power Mode | YES |
| Number of I/O Lines | 69 |
| Number of Serial I/Os | 1 |
| Number of Timers | 3 |
| On Chip Data RAM Width | 8 |
| On Chip Program ROM Width | 8 |
| PWM Channels | YES |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TQFP100,.63SQ |
| Package Shape | SQUARE |
| Package Style | FLATPACK, THIN PROFILE, FINE PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| RAM (bytes) | 2048 |
| ROM (words) | 32768 |
| ROM Programmability | FLASH |
| Speed | 20MHz |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 5V |
| Supply Voltage-Nom | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| uPs/uCs/Peripheral ICs Type | MICROCONTROLLER, RISC |
| Package | Quad Flat Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.31.00.01 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How much Flash and SRAM does the ATMEGA3290P-20AU provide for firmware and runtime data?
The ATMEGA3290P-20AU includes 32 KB of in-system programmable Flash for program storage, 2 KB of SRAM for runtime variables and stack, and 1 KB of EEPROM for non-volatile data retention. These memory capacities are sufficient for moderate complexity firmware with RTOS, peripheral drivers, and display management routines without requiring external memory in most embedded metering or HMI applications.
What makes ATMEGA3290P-20AU well suited for LCD-based meter and instrument designs?
The ATMEGA3290P-20AU integrates a dedicated LCD controller capable of driving a 4 x 25 segment LCD directly without requiring an external display driver IC. This on-chip LCD peripheral supports common electrode multiplexing ratios up to 1/4 duty and drives segment currents sufficient for standard STN LCD panels, reducing BOM cost and PCB area in energy meters, flow meters, and portable instruments requiring alphanumeric or bar-graph segment displays.
At what supply voltage and clock frequency can ATMEGA3290P-20AU operate in a 3 V battery system?
The ATMEGA3290P-20AU supports operation down to 2.7 V supply voltage at clock frequencies up to 10 MHz, making it compatible with two-cell alkaline or single-cell lithium battery systems. At 3.0 V supply and 8 MHz internal RC oscillator, the device operates within its safe operating area while consuming significantly less power than at full 5 V, 20 MHz operation, enabling multi-year battery life in low-activity sensor applications.
How many ADC channels does ATMEGA3290P-20AU provide and what is the resolution?
The ATMEGA3290P-20AU features a 10-channel, 10-bit successive-approximation ADC with an integral non-linearity of ±0.5 LSB typical. At 10-bit resolution, the ADC achieves a conversion time of 13 to 260 µs depending on the prescaler setting, enabling multiple sensor readings per millisecond at 20 MHz core clock. The ADC includes a bandgap voltage reference option of 2.56 V for ratiometric measurements without an external reference.
How does ATMEGA3290P-20AU compare to ATMEGA328P for a utility meter application?
The ATMEGA3290P-20AU provides a significant advantage over ATMEGA328P for utility meters by including an integrated LCD controller for up to 100 segment-capable displays, which the ATMEGA328P completely lacks. Both devices offer 32 KB Flash and 2 KB SRAM, but the ATMEGA3290P-20AU has 69 I/O lines versus 23 on the ATMEGA328P, supporting more keypad rows, segment lines, and peripheral connections in a single-chip meter design. The tradeoff is a larger 100-pin TQFP package compared to the compact 28-pin PDIP or TQFP-32 of the ATMEGA328P.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $7.5400 | $7.54 |
| 5+ | $5.1870 | $25.94 |
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