ATMEGA48PA-CCU - 4KB AVR MCU 20MHz UFBGA-32 | Microchip
料号： ATMEGA48PA-CCU ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.42 | $1.42 |
| 10 | $1.28 | $12.80 |
| 100 | $1.1 | $110.00 |
| 500 | $0.96 | $480.00 |
| 1,000 | $0.85 | $850.00 |
ATMEGA48PA-CCU 概述
A microcontroller unit (MCU) integrates a processor core, memory, and programmable peripherals on a single silicon die, sitting at the lowest level of the embedded-system hierarchy above bare logic ICs. The AVR ATmega family uses an advanced RISC architecture with 131 mostly single-cycle instructions, allowing one MIPS per MHz of clock speed.
Key features of the ATMEGA48PA include two 8-bit timers and one 16-bit timer, a 10-bit ADC with up to 8 channels (6 in the 32-ball package configuration), an analog comparator, USART, SPI, and two-wire (I2C) serial interfaces, plus a programmable Watchdog Timer with its own oscillator. The picoPower technology of the PA variant delivers very low sleep-mode currents for battery-powered designs.
Architecturally, the AVR core uses a Harvard structure with separate program and data buses; Flash program memory is self-programmable for boot-loader applications, and in-circuit debugging and In-Circuit Serial Programming (ICSP) are supported through two I/O pins plus reset.
Typical applications include battery-powered sensor nodes, portable consumer devices, industrial control boards, and compact IoT end nodes where the 4 x 4 mm UFBGA footprint minimizes board area.
Design consideration: the fine 0.45 mm ball pitch requires precise PCB fabrication and X-ray or AOI inspection; plan reflow profiling and keepout areas carefully, since rework of UFBGA devices is difficult.
This page synthesizes distributor pricing, verified drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： ATMEGA48PA-CCU ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ATMEGA48PA-CCU （相同外形与封装尺寸） ——差异在于 Package, Core Architecture, Mounting Type, EEPROM, SRAM.
快速对比工具——选择替代料号进行并排对比：
ATMEGA48PA-CCUR
✅ 直接替换✓ 有现货
$1.3 / 个
查看数据手册 →ATMEGA48A-CCU
✅ 直接替换✓ 有现货
$1.12 / 个
查看数据手册 →ATMEGA88PA-CCU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1.95 / 个
查看数据手册 →ATMEGA168PA-CCU
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1.29 / 个
查看数据手册 →ATMEGA48PB-CCU
✅ 直接替换📋 参考替代料（不在目录中）
ATMEGA48PA-CCU 最大额定值与电气特性
| Core Architecture | 8-bit AVR RISC |
| Program Memory (Flash) | 4 KB |
| SRAM | 512 B |
| EEPROM | 256 B |
| Maximum Clock Speed | 20 MHz |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Number of I/O | 23 |
| Timers | 2 x 8-bit, 1 x 16-bit |
| ADC Resolution | 10-bit |
| Communication Interfaces | USART, SPI, TWI (I2C) |
| Analog Comparator | Yes |
| Watchdog Timer | Yes, with separate on-chip oscillator |
| Programming / Debug | ICSP (In-Circuit Serial Programming) |
| 封装 | 32-UFBGA, 4 x 4 mm, 0.45 mm pitch, 1 mm height |
| 安装类型 | Surface Mount |
| Life Cycle Stage | ACTIVE |
ATMEGA48PA-CCU 32-ufbga, 4 x 4 mm, 0.45 mm pitch, 1 mm height 引脚配置指南
ATMEGA48PA-CCU（32-ufbga, 4 x 4 mm, 0.45 mm pitch, 1 mm height 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： ATMEGA48PA-CCU.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATMEGA48PA-CCU 适用于 6 应用s: Battery-Powered Sensor Nodes, Portable Consumer Devices, Industrial Control and Automation, IoT End Nodes, Medical and Health Monitoring Accessories, Handheld and Remote-Key Systems.
Battery-Powered Sensor Nodes
The ATMEGA48PA-CCU fits battery-powered sensor nodes because its picoPower (PA) silicon supports 1.8V operation directly from lithium coin cells or two alkaline cells, and its power-down/power-save sleep modes cut average current to microamp levels when combined with watchdog or asynchronous timer wakeups. In a typical node the MCU wakes on a timer, reads a sensor over I2C or the internal 10-bit ADC, transmits via USART or SPI to a radio, and returns to sleep. With 4KB Flash and 512B SRAM, compact state machines and sensor-fusion-lite firmware fit comfortably. The 4 x 4 mm UFBGA also shrinks node PCB area for wearable or asset-tracking form factors, though designers must budget pads for ICSP programming access.
推荐
Portable Consumer Devices
Portable consumer products such as remote controls, small appliances, and toy electronics benefit from the ATMEGA48PA-CCU's combination of 1.8V to 5.5V operation, 20 MHz RISC core with single-cycle execution, and the space-saving 32-ball UFBGA footprint (4 x 4 mm, 0.45 mm pitch). Its two 8-bit timers and one 16-bit timer handle key-scan, LED PWM dimming, and buzzer tone generation without CPU overhead, while the watchdog timer protects against firmware lockup in unattended products. The 256B EEPROM stores calibration data and user settings across power cycles. Because consumer boards are cost-driven, the ATmega48PA's low unit price at 1000-piece volumes (about $0.85 as of 2026-09-18) keeps BOM cost down, and the AVR toolchain is free of licensing fees.
推荐
Industrial Control and Automation
In industrial control boards, the ATMEGA48PA-CCU provides a low-cost embedded controller for relay sequencing, sensor polling, and simple closed-loop tasks running from a 5V rail within its 4.5V to 5.5V optimum window. The 10-bit ADC with up to eight multiplexed channels digitizes analog setpoints and feedback signals, while the analog comparator offers cycle-accurate threshold detection without software latency. USART and SPI links connect the MCU to HMI panels, RS-485 transceivers, or isolated gate drivers. The industrial-relevant caveat is package handling: the 0.45 mm UFBGA pitch requires controlled-impedance-quality PCB fabrication and reflow soldering, but it withstands vibration better than fine-pitch leaded packages because solder balls provide short, robust interconnects.
推荐
IoT End Nodes
For IoT end nodes, the ATMEGA48PA-CCU serves as the ultra-low-power host controller that manages a radio module over UART or SPI. Its 1.8V minimum supply allows direct connection to single-cell Li-SOCl2 or LiPo rails through an LDO with minimal dropout, and picoPower sleep modes let the MCU spend most of its duty cycle below a few microamps. The 4KB Flash accommodates a protocol handler plus a lightweight sensor driver; heavier TLS stacks belong on larger family members such as the ATmega168PA or 32-bit alternatives. Designers should reserve two GPIOs and RESET as ICSP/debug pads, and consider the ATMEGA48PB migration path early because Microchip documents it as the forward-compatible drop-in successor for this package with only two pin-drive restrictions.
推荐
Medical and Health Monitoring Accessories
Low-power health accessories such as thermometer wands, pulse sensors, and pill-timer devices use the ATMEGA48PA-CCU where its picoPower sleep currents, 1.8V battery operation, and 10-bit ADC support long battery life and accurate analog front-end readings. The device can average multiple ADC samples in firmware to improve effective resolution for slow biopotential or temperature signals, and the EEPROM retains patient calibration data through battery replacement. Medical accessories also value deterministic single-cycle instruction timing for sampling schedules. Regulatory designs should note that fine-pitch UFBGA solder joints should be verified with X-ray inspection, and the documented ATmega48PB drop-in path offers silicon continuity for long product lifecycles required in medical device change control.
推荐
Handheld and Remote-Key Systems
Remote key fobs, garage-door transmitters, and handheld controllers leverage the ATMEGA48PA-CCU's 4 x 4 mm UFBGA to fit the MCU beside a coin cell and RF front end on a tiny PCB. Running at reduced clock speeds lowers active current further, and the AVR's 131 single-cycle instructions make rolling-code algorithms and button debouncing efficient in 4KB of Flash. The two 8-bit timers generate precise 315/433 MHz encoder bit timing, while the EEPROM stores the rolling-code counter securely across battery swaps. Because fobs experience drops and flex, BGA interconnects distribute mechanical stress better than peripheral leaded packages. Provide a small ICSP pad cluster on the flex PCB for factory programming before final assembly.
推荐
推荐产品汇总
工程参考数据： ATMEGA48PA-CCU ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ATMEGA48PA-CCUR | ATMEGA48A-CCU | ATMEGA88PA-CCU | ATMEGA168PA-CCU |
|---|---|---|---|---|---|
| Brand | Microchip Technology (Atmel) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 32-UFBGA (4x4 mm, 0.45 mm pitch) | 32-UFBGA - same footprint | 32-UFBGA - same footprint | 32-UFBGA - same footprint | 32-UFBGA - same footprint |
| Flash Memory | 4 KB | 4 KB | 4 KB | 8 KB | 16 KB |
| SRAM | 512 B | 512 B | 512 B | 1 KB | 1 KB |
| Supply Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 2 V to 5.5 V (family A spec) | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Max Clock Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Low-Power Technology | picoPower (PA) | picoPower (PA) | standard (non-picoPower) | picoPower (PA) | picoPower (PA) |
| Pin Compatibility | Reference (AVR ATmega 32-ball map) | Pin-to-pin identical | Pin-to-pin identical | Pin-to-pin identical | Pin-to-pin identical |
关键差异点
- picoPower low-power silicon with 1.8V operation （对比 ATMEGA48A-CCU)
- Smallest ATmega footprint option （对比 ATMEGA48PA-AU)
- Lowest-cost entry in a pin-compatible memory family （对比 ATMEGA168PA-CCU)
设计说明
The ATMEGA48PA-CCU uses a 0.45 mm ball pitch UFBGA, which demands PCB fabrication with fine-line capability (typically 4/4 mil trace/space or better) and solder-mask-defined or non-solder-mask-defined pads per the Microchip package drawing. Follow IPC-style dogbone or via-in-pad escape routing; via-in-pad requires fill-and-cap plating to prevent solder wicking voids. Specify X-ray or AOI inspection at contract manufacturing, since solder balls are hidden after reflow. Estimated: standard stencil thickness of 100 um with adequate aperture design is a common starting point for 0.45 mm BGA assemblies, but confirm with your assembly house profile.
If migrating to the ATMEGA48PB, respect the documented restrictions from Microchip application note 00002605A: pin 3 must not be actively driven if connected to GND (and ACO must not be enabled), and pin 6 must not be actively driven if connected to VCC. Additionally, do not write reserved registers when targeting cross-family compatibility, as PB devices differ in signature bytes and some peripheral features such as the USART and full-swing oscillator. Design new PA boards with these two pins left undriven or testable so the PB drop-in path remains open.
Decouple VCC with a 100 nF ceramic capacitor placed as close as possible to the UFBGA power balls, plus bulk capacitance of 4.7 uF to 10 uF near the rail entry. The AVR core tolerates supply ripple well, but ADC accuracy degrades with noisy AVCC - use an RC filter or dedicated LDO for the analog supply and connect AVCC to VCC through a low-pass network when ADC precision matters. Operating at 1.8V reduces maximum permissible clock speed; consult the family datasheet speed-versus-VCC curve rather than assuming 20 MHz at all voltages.
Reserve an ICSP/debug pad cluster (MOSI, MISO, SCK, RESET, VCC, GND) on the PCB because the UFBGA balls are inaccessible after assembly. debugWIRE uses the RESET line only, so a single 2x3 or 1x5 test-pad pattern is sufficient for both programming and debugging with an Atmel-ICE. Keep RESET pull-up (10 kOhm) close to the device and add a series 100 Ohm resistor if you plan to enable debugWIRE, since that pin also carries the debug signal.
合规信息
Distributor data mentions a GREEN plastic package description for this part, but formal RoHS/REACH/lead-free declarations were not present in the provided verified data; confirm on the official Microchip product page or certificate of conformance.
