ATMEGA88A-PU - 8-bit 20MHz AVR MCU | Microchip Technology
MPN: ATMEGA88A-PU ✓ نشطATMEGA88A-PU نظرة عامة
A microcontroller is a complete programmable control component integrating a CPU core, nonvolatile program memory, data memory, peripherals, and I/O in one package. Within the product hierarchy, the ATMEGA88A-PU is an 8-bit AVR microcontroller, part of the broader embedded-controller and semiconductor categories. It is suited to compact embedded systems in which deterministic control, serial communication, and low-cost PCB assembly are more important than high processor throughput or large data storage.
The verified device data identifies three timer/counters with compare modes, internal and external interrupts, 32 general-purpose working registers, and serial interfaces including USART and Two-Wire Interface. Its 23 I/O lines provide flexible connections for sensors, actuators, indicators, and control logic. Read-while-write Flash allows the program memory to remain readable during programming operations, while the 512 B EEPROM supports persistent parameter storage outside the 1 KB SRAM workspace.
The 28-PDIP package supports through-hole assembly and is useful for prototypes, educational platforms, and production boards where insertion and inspection are preferred over compact SMT packaging. The manufacturer product page describes the ATmega88A family as an active, picoPower 8-bit AVR RISC-based device. The DigiKey listing identifies ATMEGA88A-PU as a 28-PDIP part operating up to 20 MHz, while Mouser lists 8 KB Flash, 512 B EEPROM, and 1 KB SRAM.
Typical applications include compact sensor controllers, building-automation endpoints, industrial control modules, hobbyist robotics, and legacy AVR firmware updates. The USART supports host-oriented serial links, while the Two-Wire Interface can connect compatible sensors or peripherals. For new designs, engineers should confirm the exact oscillator, fuse, and operating-voltage configuration against the manufacturer documentation for the selected ordering variant.
A key design consideration is package choice: the DIP format occupies more board area than an equivalent surface-mount package, but it simplifies breadboard prototyping, socket assembly, and field replacement. Firmware must also be sized for the 8 KB Flash limit and should account for bootloader space if serial programming is retained. Decoupling and signal-layout guidance should follow the AVR family hardware recommendations.
This page consolidates verified manufacturer and distributor information, verified pricing, package data, and practical selection guidance. It also distinguishes a genuine drop-in alternative from parts that merely use a similar controller or require a footprint, memory, voltage, or peripheral-function change.
بدائل مباشرة لـ ATMEGA88A-PU — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع ATMEGA88A-PU (نفس عامل الشكل والبصمة) — يختلف في Package, Timers, Mounting Type, SRAM, Core Processor.
ATMEGA88PA-PU
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA88A-PU الحدود القصوى والخصائص الكهربائية
| Product Type | 8-bit AVR RISC-based microcontroller |
| Maximum Clock Speed | 20 MHz |
| Flash Memory | 8 KB (4K x 16) |
| EEPROM Memory | 512 B |
| SRAM | 1 KB |
| General-Purpose I/O Lines | 23 |
| General-Purpose Working Registers | 32 |
| Timer/Counter Resources | 3 |
| Timer/Counter Features | Compare modes |
| Interrupt Support | Internal and external interrupts |
| Serial Communication | USART and byte-oriented Two-Wire Interface |
| Program Memory Type | In-system programmable Flash with read-while-write capability |
| العلبة | 28-pin plastic dual in-line package (28-PDIP) |
| نوع التركيب | Through-hole |
| جهد التغذية | 4.5 V to 5.5 V |
| Core Architecture | AVR RISC |
| Low-Power Technology | picoPower |
دليل تكوين أطراف ATMEGA88A-PU 28-pin plastic dual in-line package (28-pdip)
تكوين الأطراف لـ ATMEGA88A-PU (حزمة 28-pin plastic dual in-line package (28-pdip)). تتضمن هذه الدائرة المتكاملة الرقمية GPIO وواجهات الاتصال (UART وSPI وI2C) وأطراف الطاقة. راجع ورقة بيانات الشركة المصنعة لوظائف الأطراف البديلة وخيارات التكوين. ضرورية لتصميم الأنظمة المدمجة وتخطيط PCB.
لا تتوفر بيانات مفصلة لمخطط التوصيلات لـ ATMEGA88A-PU.
راجع ورقة البيانات للحصول على تكوين الأطراف الكامل.
التطبيقات النموذجية
ATMEGA88A-PU مناسب لـ 6 التطبيقs: Compact Industrial Sensor Controller, Building Automation Endpoint, Hobbyist Robotics Controller, Serial Data Acquisition Module, Legacy AVR Firmware Update Platform, AVR-Based Communication Peripheral.
Compact Industrial Sensor Controller
The ATMEGA88A-PU fits compact sensor nodes because it provides 23 general-purpose I/O lines alongside 8 KB of Flash, 512 B of EEPROM, and 1 KB of SRAM. Its internal and external interrupts let the firmware respond to sensor events without continuous polling, while three timer/counters support measurement intervals and output timing. The 4.5 V to 5.5 V operating range suits regulated 5 V control boards. Designers should budget the limited SRAM for buffers, avoid placing large data-processing workloads in firmware, and confirm temperature and EMC requirements before industrial deployment.
موصى به
Building Automation Endpoint
The ATMEGA88A-PU can serve as a low-cost building-automation endpoint for monitoring switches, controlling relays, and reporting status over a serial link. Its 23 I/O lines provide ample connections for digital inputs and outputs, and the USART supports a host or controller. The two-wire interface can connect compatible sensors when address and timing permit. Because the MCU offers only 8 KB of Flash and 1 KB of SRAM, the firmware should use compact drivers and avoid buffering large diagnostic histories in RAM.
موصى به
Hobbyist Robotics Controller
The ATMEGA88A-PU is suitable for educational and hobby robotics because it combines a 20 MHz AVR core with 23 I/O lines and three timer/counters for motor, encoder, and pulse-width control. The 28-PDIP package is easy to place on a perforated board or prototype PCB and can be socketed for convenient replacement. The 5 V supply range and limited 8 KB Flash footprint fit small platforms rather than advanced motion-control algorithms. Designers should use external transistor drivers for motors and include current limiting or protection wherever the board connects to external hardware.
موصى به
Serial Data Acquisition Module
The ATMEGA88A-PU can act as a compact acquisition and control module when the measured signals fit its 23 I/O lines and its timer resources. Timers with compare modes support periodic sampling or output toggling, while USART provides a straightforward path to a host computer. Its 512 B EEPROM is useful for calibration constants, and 1 KB of SRAM accommodates modest working buffers. Engineers should establish a sampled-data budget before firmware development and use the manufacturer's clock configuration guidance to avoid timing errors.
موصى به
Legacy AVR Firmware Update Platform
The ATMEGA88A-PU is well suited to maintaining or reproducing legacy AVR equipment because it retains 8 KB of in-system programmable Flash with read-while-write capability, 512 B of EEPROM, and the familiar AVR peripheral set. The 28-PDIP package supports socketed service assemblies and through-hole replacement boards. Its 1 KB SRAM is adequate for many small control tasks but not for large protocol stacks. A replacement should preserve fuse, clock, and bootloader assumptions, and firmware should be validated with margin because the ATmega88A family offers limited memory compared with current high-density MCUs.
موصى به
AVR-Based Communication Peripheral
The ATMEGA88A-PU can implement a small protocol converter, configurator, or bridge around its USART and byte-oriented Two-Wire Interface. Three timers permit accurate bit timing, timeout handling, and periodic housekeeping, while 23 I/O lines can expose status LEDs or configuration inputs. The verified 20 MHz maximum clock provides timing margin for moderate baud rates. Firmware designers should avoid excessive blocking delays, account for the 1 KB SRAM limit when buffering both communication directions, and validate timing against the selected oscillator configuration.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ ATMEGA88A-PU — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | ATMEGA88PA-PU |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Package | 28-PDIP | 28-PDIP |
أبرز الفروقات
- Verified 20 MHz performance in a serviceable through-hole package (مقابلATMEGA88PA-PU)
- Memory resources are explicitly documented for firmware planning (مقابلATMEGA88PA-PU)
- Integrated serial and timing resources for compact embedded control (مقابلATMEGA88PA-PU)
ملاحظات التصميم
Design the board around the verified 28-PDIP footprint rather than assuming an SMT pinout. Reserve adequate drill spacing and connector clearance for the through-hole package. Because the 20 MHz maximum clock depends on the complete power and clock implementation, follow the AVR hardware recommendations for decoupling, ground return paths, and oscillator layout. Review the manufacturer pin drawing before assigning each of the 28 package pins.
Use a regulated supply within the verified 4.5 V to 5.5 V range and place the required bypass capacitors close to the device supply pins. The available data does not specify exact capacitor values, so do not infer them from memory; obtain the applicable family electrical characteristics and reference layout. Validate startup and brownout behavior across temperature and load if the module operates at the ends of the supported voltage range.
Treat 8 KB Flash, 1 KB SRAM, and 512 B EEPROM as hard design limits. Include bootload space in the memory budget, avoid libraries that exceed the available RAM, and make EEPROM writes infrequent if write endurance matters. Do not assume that an ATmega-family substitute is pin-compatible: verify oscillator, reset, programming, analog, and peripheral pins independently before releasing a production board.
The 28-PDIP package is convenient for prototypes but consumes considerably more PCB area than a surface-mount equivalent and may not suit compact products. For low-volume serviceability, a socket can simplify replacement but increases height and contact resistance considerations. For high-volume production, compare the board-area and assembly cost implications of an SMT device without assuming that its firmware and pinout are interchangeable.
معلومات الامتثال
The supplied product and distributor results do not explicitly state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is not applicable because the device is an MCU rather than an automotive-qualified power device; no automotive qualification was identified.
