ATTINY88-MMU - 12MHz 8KB AVR MCU, 28-VQFN | Microchip
MPN： ATTINY88-MMU ✓ 啟用中ATTINY88-MMU 概覽
An AVR microcontroller is a compact embedded-processing semiconductor that combines a CPU core, program memory, data memory, and peripherals on one integrated circuit. The ATTINY88 belongs to the AVR 8-bit product hierarchy, where it functions as a general-purpose microcontroller suitable for embedded control, sensing, and low-power automation. Its picoPower AVR architecture targets efficient instruction execution and energy-conscious embedded operation.
Key features include 8 KB of ISP flash organized as 4K x 16, 64 bytes of EEPROM, 512 bytes of SRAM, and 28 general-purpose I/O lines. The device provides two flexible timer/counters with compare modes and supports internal and external clock sources. In-system programming and in-circuit debugging facilitate programming and troubleshooting, while the 1.8 V to 5.5 V supply range allows use with common low-voltage and legacy 5 V systems.
The ATTINY88 combines a high pin count with relatively small memory resources. This balance supports multi-I/O control boards, compact sensor nodes, and embedded products that need more GPIO than an 8-pin or 14-pin MCU but do not require the memory or processing capacity of a 32-bit microcontroller. Its 28-VQFN footprint also reduces board area, although the fine-pitch package demands careful PCB layout and assembly.
Typical applications include industrial control modules, environmental monitoring, LED and lighting controllers, compact sensor hubs, appliance interfaces, and low-power embedded products. The 28 GPIO lines allow multiple inputs and outputs to be connected simultaneously, reducing the need for external I/O expanders in small systems.
Designers should pay close attention to the 4x4 mm VQFN exposed-pad land pattern, pin orientation, and the availability of only 512 bytes of SRAM. Firmware should avoid unnecessary RAM buffering, use EEPROM only for data that must persist across power cycles, and include the exposed thermal pad in the PCB copper and assembly process.
This page consolidates verified manufacturer and distributor information, a parameter-by-parameter comparison, application guidance, and practical design notes for engineers evaluating the ATTINY88-MMU, its package constraints, and verified same-family alternatives.
直接替換替代品，適用於 ATTINY88-MMU — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ATTINY88-MMU （相同外形與佔位） — 差異在於 Architecture, Flash Memory, Package, Product Type, SRAM.
ATTINY48-MMU
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATTINY48-MMH
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATTINY88-MMH
✅ 直接替換聯絡詢價
查看資料表 →ATTINY88-MMU 最大額定值與電氣特性
| Product Type | 8-bit AVR RISC microcontroller |
| Architecture | picoPower AVR |
| Maximum Clock Speed | 12 MHz |
| Flash Memory | 8 KB (4K x 16) |
| EEPROM Memory | 64 bytes |
| SRAM | 512 bytes |
| General-Purpose I/O Lines | 28 |
| General-Purpose Working Registers | 32 |
| Timer/Counter Count | 2 |
| Timer/Counter Features | Compare modes |
| Operating Voltage Range | 1.8 V to 5.5 V |
| Clock Sources | Internal and external |
| Programming Interface | In-system programming (ISP) |
| Debug Interface | In-circuit debugging |
| 封裝 | 28-VQFN (4 mm x 4 mm) |
| Package Type | VQFN |
| 安裝類型 | Surface mount |
| Shipping Package | Tray |
| 生命週期狀態 | In Production |
ATTINY88-MMU tray 腳位配置指南
ATTINY88-MMU（tray 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： ATTINY88-MMU.
請參閱 資料表 以查看完整腳位配置。
典型應用
ATTINY88-MMU 適用於 6 應用s: Industrial Control and Automation, Environmental Sensor Node, LED Lighting Controller, Compact Appliance Interface, Low-Power Embedded Controller, Programmable Logic Controller.
Industrial Control and Automation
The ATTINY88-MMU fits compact industrial control modules that need substantial parallel I/O without the memory overhead of a 32-bit MCU. Its 28 GPIO lines can monitor switches, operate logic-level outputs, and interface with multiple sensors while the 8 KB of flash stores a focused control program. The 1.8 V to 5.5 V operating range also accommodates common industrial signal levels. The principal design constraint is the 512-byte SRAM, which requires careful stack allocation and limits large local buffers. The 4x4 mm VQFN package saves board area, but the exposed pad and fine-pitch footprint demand controlled assembly and thermal-copper planning.
推薦
Environmental Sensor Node
The ATTINY88-MMU is suitable for an environmental sensor node that combines multiple digital sensors, status indicators, and a low-rate communications interface. Its 28 GPIO lines reduce the need for I/O expanders, while 8 KB of flash provides room for sampling logic and communications routines beyond a basic 8-pin device. Operating down to 1.8 V supports low-voltage sensing platforms, although current consumption under the intended duty cycle was not provided. Firmware should use the limited 512 bytes of SRAM carefully and retain only essential state in the 64-byte EEPROM.
推薦
LED Lighting Controller
The ATTINY88-MMU can control multi-channel LED lighting boards because 28 GPIO lines provide ample connections for drivers, buttons, and fault indicators. Its 12 MHz AVR performance is suitable for straightforward sequencing and modulation logic, while the 8 KB flash accommodates a broader lighting pattern table than the 4 KB ATtiny48 family option. The 1.8 V to 5.5 V range allows integration with common driver architectures. Designers must account for LED-driver supply levels, grounding, current limits, and the MCU's comparatively small 512-byte SRAM when planning animation buffers.
推薦
Compact Appliance Interface
The ATTINY88-MMU is appropriate for a compact appliance interface that must connect buttons, displays, relays, and status LEDs while preserving board area. Its 28-pin VQFN footprint is considerably smaller than a conventional through-hole controller package, and the 8 KB flash provides useful program storage for user-interface and safety-state logic. The 1.8 V to 5.5 V operating range supports both low-voltage control sections and 5 V peripheral circuits. Product teams should verify relay or load transients, isolation requirements, and firmware watchdog behavior because those details are not present in the supplied excerpts.
推薦
Low-Power Embedded Controller
The ATTINY88-MMU can serve as the central controller in a low-power embedded product because its picoPower AVR architecture is designed around efficient AVR operation and its supply range extends to 1.8 V. The 28 GPIO lines support wake-capable sensing and direct control of low-power peripherals without an I/O expander. Its 8 KB flash is sufficient for compact state machines, while the 64-byte EEPROM is reserved for small persistent settings. Actual sleep current and wake-up behavior were not supplied, so battery sizing must be based on measured duty-cycle operation and the manufacturer low-power specifications.
推薦
Programmable Logic Controller
The ATTINY88-MMU can implement a small programmable logic controller for sequencing, discrete input monitoring, and actuator control. Its two timer/counters with compare modes provide hardware timing resources for pulse generation or event capture, while 28 GPIO lines permit multiple field connections. The 8 KB flash offers more firmware capacity than the 4 KB ATtiny48 candidate, and the 512-byte SRAM remains adequate for modest state machines without large history buffers. Before deployment, engineers should validate watchdog behavior, input filtering, output fail-safe states, and the device's 1.8 V to 5.5 V limits against the target machine interface.
推薦
推薦產品摘要
工程參考資料，適用於 ATTINY88-MMU — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ATTINY48-MMU | ATTINY48-MMH | ATTINY88-MMH |
|---|---|---|---|---|
| Package | 28-VQFN (4 mm x 4 mm) | 28-VQFN (4 mm x 4 mm) | 28-VQFN (4 mm x 4 mm) | 28-VQFN (4 mm x 4 mm) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Architecture | picoPower AVR | AVR | AVR | picoPower AVR |
| Flash Memory | 8 KB (4K x 16) | 4 KB | 4 KB | 8 KB |
| EEPROM Memory | 64 bytes | 64 bytes | 64 bytes | 64 bytes |
| SRAM | 512 bytes | 512 bytes | 512 bytes | 512 bytes |
| General-Purpose I/O Lines | 28 | 28 | 28 | 28 |
主要差異化特點
- Twice the flash memory of the ATtiny48 family candidates (對比ATTINY48-MMU)
- More GPIO than typical small-package AVR devices (對比ATTINY48-MMU)
- Same-family ordering alternative retains the 8 KB memory class (對比ATTINY88-MMH)
設計說明
Use the manufacturer land pattern for the 28-VQFN 4x4 mm package and verify pin 1 orientation against the assembled-device marking. The exposed thermal pad must connect to the same ground net as the specified ground pins and should be supported by solderable copper rather than left as an isolated pad. Because the supplied excerpts do not include a pin-by-pin drawing, do not create a PCB symbol from memory; download the official family data sheet and cross-check every power, ground, programming, and I/O connection.
Decouple the 1.8 V to 5.5 V supply close to the device using the capacitor values and placement specified in the manufacturer data sheet. Keep analog sensor grounds and digital return paths controlled to avoid injecting switching or relay noise into the MCU supply. The verified data does not provide recommended capacitors, maximum supply ramp limits, or operating-current figures, so these values must be taken directly from the official documentation rather than inferred from other AVR devices.
Do not assume that an ATTINY48 or ATTINY88 ordering code is interchangeable solely because it uses a 28-VQFN footprint. The ATtiny48 candidates provide 4 KB of flash, 50% less than the ATTINY88-MMU's verified 8 KB, so an existing binary may exceed their available program memory. Check bootloader placement, EEPROM usage, SRAM allocation, clock configuration, fuse settings, temperature grade, and the exposed-pad requirement before approving a substitution.
Place programming and debug access points where they can be reached without disturbing the fine-pitch QFN leads. Route high-speed or noisy signals away from ISP and reset paths, and provide a clean ground reference near the device. The 512-byte SRAM can make deep call chains and copied buffers a functional risk; review stack usage and use the compiler's memory report. Where continuous logging or packet buffers are required, select a higher-memory AVR or add a dedicated storage or communications device.
合規資訊
The verified source excerpts identify the device as green and In Production but do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Compliance fields are therefore left unknown rather than inferred.
