ATMEGA48PA-CCUR - 4KB Flash AVR MCU 20MHz 32-UFBGA | Microchip
MPN: ATMEGA48PA-CCUR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.54 | $1.54 |
| 10 | $1.49 | $14.90 |
| 100 | $1.42 | $142.00 |
| 500 | $1.36 | $680.00 |
| 1,000 | $1.3 | $1,300.00 |
ATMEGA48PA-CCUR Overview
A microcontroller (MCU) is a single-chip computer that integrates a processor core, memory, and programmable peripherals on one die. The AVR ATmega family sits within the broader taxonomy of 8-bit MCUs, which are widely used where low cost, deterministic execution, and low power matter more than raw processing throughput. The ATMEGA48PA is the picoPower variant of the ATmega48, engineered for battery-operated and energy-conscious designs.
Key features include 131 RISC instructions with mostly single-cycle execution, up to 20 MIPS throughput at 20MHz, 4KB (2K x 16) self-programmable FLASH, 256B EEPROM and 512B SRAM (per family datasheet), and supply operation across 1.8V to 5.5V per Microchip documentation, supporting 2.5V, 3.3V, and 5V systems.
The picoPower technology provides multiple sleep modes with sub-uA sleep currents, making the PA grade attractive for coin-cell products. Two 8-bit and one 16-bit timers, a 10-bit ADC, USART, SPI, and TWI (I2C) peripherals cover most embedded interfacing needs. The compact 4x4 mm UFBGA suits space-constrained, two-layer or four-layer portable boards.
Typical applications include battery-powered sensor nodes, consumer handheld devices, industrial sensing front ends, and small HMI controllers.
Design consideration: the fine 0.45 mm ball pitch demands precise PCB land patterns and X-ray or AOI inspection during reflow; plan test points early since BGA balls are not probeable.
This page adds value beyond the manufacturer datasheet by synthesizing distributor pricing, drop-in alternatives within the same 32-UFBGA footprint, and practical design notes in one place.
Drop-in alternatives for ATMEGA48PA-CCUR — 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 ATMEGA48PA-CCUR (same form factor and footprint) — differing in Package, Flash Memory, Mounting Type, EEPROM, SRAM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATMEGA48PA-CCU
✅ Drop-In✓ In Stock
$0.85 / Unit
View Datasheet →ATMEGA48A-CCUR
✅ Drop-In✓ In Stock
$1.02 / Unit
View Datasheet →ATMEGA48A-CCU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.12 / Unit
View Datasheet →ATMEGA48P-20MMU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.1698 / Unit
View Datasheet →ATMEGA48PA-CCUR Maximum Ratings & Electrical Characteristics
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 20 MHz |
| Flash Memory Size | 4 KB (2K x 16) |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Operating Voltage Classes | 2.5 V / 3.3 V / 5 V |
| Number of I/O | 23 |
| Package | 32-UFBGA (4x4 mm, 0.45 mm pitch) |
| Package Height | 1.0 mm |
| Mounting Type | Surface Mount |
| Operating Temperature Min | -40 C |
| Operating Temperature Max | 85 C |
| Packaging | Tape & Reel (T/R) |
| Program Memory Type | FLASH (In-System Programmable) |
| Instructions | 131 instructions, most single-cycle |
| Number of ADCs | 1 |
ATMEGA48PA-CCUR 1.0 mm Pin Configuration Guide
Pin configuration for ATMEGA48PA-CCUR (1.0 mm 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 ATMEGA48PA-CCUR.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA48PA-CCUR is suitable for 6 applications: Battery-Powered Sensor Nodes, Wearable and Portable Devices, Industrial Sensing Front Ends, Consumer Small Appliances, IoT Edge Nodes and Smart Home Devices, Embedded HMI and Display Controllers.
Battery-Powered Sensor Nodes
The ATMEGA48PA-CCUR fits battery-powered sensor nodes because its picoPower technology offers multiple sleep modes with sub-microamp standby current, extending coin-cell or AA battery life from months to years. The 20MHz AVR core wakes quickly to sample a sensor via the integrated 10-bit ADC or a digital interface, processes the reading, and returns to sleep. Its 1.8V to 5.5V supply range tolerates declining battery voltage without a regulator, and the 4x4 mm 32-UFBGA keeps the node compact. Trade-off: 4KB Flash limits protocol stacks, so keep firmware lean.
Recommended
Wearable and Portable Devices
Wearable and handheld products benefit from the ATMEGA48PA-CCUR's combination of a 4x4 mm, 1.0 mm-high UFBGA package, picoPower sleep modes, and 1.8V low-voltage operation that matches single-cell lithium supplies. The 23 I/O lines drive buttons, LEDs, vibration motors, and I2C sensor buses directly without external glue logic. Because the ball pitch is 0.45 mm, a four-layer PCB with via-in-pad is recommended for routability and reliability. Typical companion parts include MEMS accelerometers and small OLED controllers on the TWI bus.
Recommended
Industrial Sensing Front Ends
In industrial sensing front ends, the ATMEGA48PA-CCUR provides deterministic 8-bit control with a 10-bit ADC for thermistors, potentiometers, and ratiometric sensors, while USART, SPI, and TWI interfaces link to displays and field buses. Operation from -40C to +85C covers unconditioned factory environments, and the 5V supply class integrates directly with legacy 24V-panel I/O conditioned by optocouplers. Flash self-programming allows field firmware updates. Choose the PA picoPower grade when the node sleeps between polling events to cut average consumption significantly.
Recommended
Consumer Small Appliances
Small consumer appliances - coffee makers, fans, chargers, and toy controllers - use the ATMEGA48PA-CCUR for its low cost (about $1.50 per unit as of 2026-09-18), 20MHz single-cycle RISC performance, and green RoHS-oriented packaging. The 4KB Flash is typically sufficient for state machines, simple menus, and PWM motor or LED control using the two 8-bit and one 16-bit timers. The 32-UFBGA reduces PCB area for compact housings, though assembly cost at 0.45 mm pitch must be weighed against cheaper TQFP variants in high-volume consumer production.
Recommended
IoT Edge Nodes and Smart Home Devices
Smart home devices such as sensor pucks, switches, and remote controls use the ATMEGA48PA-CCUR as the local MCU paired with a wireless module over UART or SPI. PicoPower sleep modes let the node sit idle for long periods while a low-power radio wakes it, and 1.8V compatibility allows direct sharing of the radio module's supply rail. With 23 I/O, the MCU handles capacitive or mechanical buttons and status LEDs simultaneously. Firmware must stay under 4KB Flash, so simple binary protocol bridges rather than full TCP/IP stacks are realistic here.
Recommended
Embedded HMI and Display Controllers
The ATMEGA48PA-CCUR works as a compact HMI controller driving segment LCDs via bit-banged SPI, LED matrices, or small OLED modules through TWI/I2C. The 20MHz core refreshes multiplexed displays without visible flicker while timers handle backlight PWM dimming. Button scanning across up to 23 I/O lines supports keypad arrays with interrupt-on-change wake from deep sleep, saving power in standby. For 5V systems the MCU connects directly to classic HD44780-style text LCDs. Designs needing touch or graphical acceleration should step up to the ATmega328PB or ATmega32 family instead.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA48PA-CCUR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA48PA-CCU | ATMEGA48A-CCUR | ATMEGA48A-CCU |
|---|---|---|---|---|
| Package | 32-UFBGA (4x4 mm, 0.45 mm pitch) | 32-UFBGA (4x4 mm) - same | 32-UFBGA (4x4 mm) - same | 32-UFBGA (4x4 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 4 KB (2K x 16) | 4 KB (2K x 16) | 4 KB (2K x 16) | 4 KB (2K x 16) |
| Max Clock Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Supply Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 2.5 V / 3.3 V / 5 V | 2.5 V / 3.3 V / 5 V |
| PicoPower Technology | Yes (PA grade) | Yes (PA grade) | No (standard A grade) | No (standard A grade) |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Packaging Format | Tape & Reel (T/R) | Tray | Tape & Reel (T/R) | Tray |
Key Differentiators
- picoPower technology for battery applications (vs ATMEGA48A-CCUR)
- Wide 1.8V to 5.5V supply range (vs ATMEGA48A-CCUR)
- Low unit cost for an MCU in BGA (vs ATMEGA48PA-CCU)
Design Notes
The 32-UFBGA with 0.45 mm ball pitch requires NSMD land pads of approximately 0.28-0.30 mm diameter with solder-mask-defined clearance, per standard BGA land-pattern practice. Via-in-pad with microvia fill is recommended on a 4-layer board to escape the inner ball rows. Reflow profiles must follow Microchip's MSL classification for the package, and X-ray or AOI inspection is essential since solder joints are hidden. Estimated: routing all 23 I/O plus power on two layers is impractical; budget at least four layers for signal escape.
Decouple VCC/AVCC with 100 nF ceramic capacitors placed as close to each supply ball as possible, plus a bulk 4.7-10 uF capacitor. With 1.8V to 5.5V operation, ensure brown-out detection is enabled and its threshold is set below the minimum battery voltage for your design. For picoPower savings, disable unused peripherals in the Power Reduction Register and select the deepest sleep mode compatible with your wake latency requirement. Estimated: a 3V coin-cell design sleeping at sub-uA current achieves multi-year shelf-life-class operation.
If migrating to ATmega48PB later, note Microchip application note 00002605A cautions: Pin 3 must not be actively driven when tied to GND and ACO must not be enabled, and Pin 6 must not be actively driven when tied to VCC. Also, ISP programming uses two I/O pins plus reset - reserve pad access or a test footprint for the ISP header, since BGA balls cannot be probed after assembly. Do not exceed 20MHz at the low-voltage end of the supply range without checking the frequency-vs-voltage curve in the datasheet.
Compliance Information
DigChip lists lifecycle stage ACTIVE and the package as green plastic, suggesting RoHS orientation, but specific RoHS/REACH/lead-free declarations for this ordering code were not present in the provided data.
