ATMEGA8535L-8MUR - 8-bit AVR MCU 8KB Flash 44-VQFN | Microchip
料号： ATMEGA8535L-8MUR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.6 | $1.60 |
| 10 | $1.45 | $14.50 |
| 100 | $1.3 | $130.00 |
| 500 | $1.18 | $590.00 |
| 1,000 | $1.05 | $1,050.00 |
ATMEGA8535L-8MUR 概述
An AVR ATmega microcontroller is an 8-bit reduced-instruction-set (RISC) MCU that executes most of its 130 powerful instructions in a single clock cycle. In the embedded-systems hierarchy, it belongs to the ATmega family of AVR microcontrollers, which sit within Microchip's broader 8-bit MCU portfolio and typically serve as the main system controller in cost-sensitive, low-power designs.
Key features include the advanced RISC core with 32 x 8-bit general-purpose working registers, a throughput of up to 16 MIPS at 16 MHz (8 MIPS at this part's 8 MHz grade), and 32 programmable I/O lines. The L-suffix grade operates from a 2.7 V to 5.5 V supply at speeds of 0 to 8 MHz, making it suitable for both 3.3 V and 5 V systems, while the non-L ATmega8535 requires 4.5 V to 5.5 V and runs to 16 MHz.
The peripheral set covers two 8-bit and two 16-bit timers/counters with PWM, an 8-channel 10-bit ADC, a byte-oriented Two-Wire Serial Interface (I2C-compatible), an SPI serial port, a programmable serial USART, and an on-chip analog comparator. Six software-selectable power-saving modes (Idle, ADC Noise Reduction, Power-save, Power-down, Standby, and Extended Standby) let designers cut current draw dramatically in battery-operated equipment.
Typical applications include industrial control panels, sensor data acquisition with the 10-bit ADC, motor control via PWM timers, building automation, and legacy AVR system maintenance where the ATmega8535 was originally designed in.
Design-wise, use the VQFN package's exposed pad for solid ground connection, keep the analog reference (AREF) path clean when using the ADC, and remember that debug relies on the debugWIRE-compatible serial interface toolchain since this generation lacks JTAG. Flash endurance and ISP support allow field firmware updates over SPI.
This page synthesizes verified distributor pricing, same-footprint drop-in alternatives across the AVR ATmega family, and practical design notes not consolidated in the manufacturer datasheet.
直接替换替代料： ATMEGA8535L-8MUR ——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： ATMEGA8535L-8MUR （相同外形与封装尺寸） ——差异在于 Package, EEPROM, SRAM, Operating Temperature, Core Architecture.
快速对比工具——选择替代料号进行并排对比：
ATMEGA8535-16MI
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$3.35 / 个
查看数据手册 →ATMEGA8535-16MUR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATMEGA16L-8MUR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATMEGA32L-8MUR
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$4.95 / 个
查看数据手册 →ATMEGA8515L-8MUR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ATMEGA8535L-8MUR 最大额定值与电气特性
| Core | AVR 8-bit RISC |
| Core Size | 8-bit |
| Program Memory Size | 8 KB (4K x 16) FLASH |
| EEPROM Size | 512 B |
| RAM Size | 512 x 8 |
| Speed | 8 MHz |
| Supply Voltage Range | 2.7 V to 5.5 V (ATmega8535L grade) |
| ADC Channels | 8-channel, 10-bit |
| Programmable I/O Lines | 32 |
| Timers/Counters | Two 8-bit and two 16-bit |
| Communication Interfaces | USART, SPI, Two-Wire Serial Interface (I2C-compatible) |
| Analog Comparator | On-chip |
| Sleep Modes | 6 (Idle, ADC Noise Reduction, Power-save, Power-down, Standby, Extended Standby) |
| Instructions | 130 powerful instructions, most single-clock cycle |
| Throughput | Up to 16 MIPS at 16 MHz (device family) |
| 封装 | 44-pad VQFN/MLF, 7 x 7 mm body |
| 安装类型 | Surface Mount |
| Speed Grade Definition | 0 - 8 MHz for ATmega8535L; 0 - 16 MHz for ATmega8535 |
| Available Packages (family) | 40-pin PDIP, 44-lead TQFP, 44-lead PLCC, 44-pad QFN/MLF |
ATMEGA8535L-8MUR 40-pin pdip, 44-lead tqfp, 44-lead plcc, 44-pad qfn/mlf 引脚配置指南
ATMEGA8535L-8MUR（40-pin pdip, 44-lead tqfp, 44-lead plcc, 44-pad qfn/mlf 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： ATMEGA8535L-8MUR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATMEGA8535L-8MUR 适用于 6 应用s: Industrial Control Panels, Multi-Channel Sensor Data Acquisition, DC Motor Control and PWM Drives, Building Automation and HVAC Nodes, Legacy AVR System Maintenance, Battery-Powered Portable Instruments.
Industrial Control Panels
The ATMEGA8535L-8MUR fits industrial control panels because its 32 programmable I/O lines, two 8-bit and two 16-bit timers with PWM, and wide 2.7 V to 5.5 V supply tolerate noisy 5 V industrial rails and brownout conditions. The single-cycle RISC core at 8 MHz delivers roughly 8 MIPS, enough for relay sequencing, button debouncing, and status-LED logic. The VQFN 7 x 7 mm footprint keeps controller area compact, and In-System Programming over SPI allows field firmware updates without desoldering the MCU from the production board.
推荐
Multi-Channel Sensor Data Acquisition
For sensor data acquisition, the ATMEGA8535L-8MUR provides an 8-channel 10-bit ADC that can multiplex up to eight analog sensor inputs at up to 15 kSPS-class throughput, adequate for temperature, pressure, and level sensing. Running from 2.7 V to 5.5 V, it interfaces directly with 3.3 V or 5 V sensor bridges, while AVCC and AREF pins allow a clean analog supply and selectable reference for best resolution. Results stream out over USART or SPI to a host, and the ADC Noise Reduction sleep mode lowers digital noise during conversions for improved effective bit count.
推荐
DC Motor Control and PWM Drives
The ATMEGA8535L-8MUR suits small DC motor and actuator control using its two 8-bit timers and two 16-bit timers, which generate multiple independent PWM channels with programmable resolution and dead time via output-compare pins. The 8 MHz clock gives PWM granularity sufficient for fan, pump, and conveyor speed control, and the on-chip analog comparator supports current-limit or zero-cross detection without external op-amps. Six sleep modes let the controller idle between command cycles, cutting average system current in battery-backed industrial equipment.
推荐
Building Automation and HVAC Nodes
In building automation, the ATMEGA8535L-8MUR's Two-Wire Serial Interface (I2C-compatible) and SPI port connect it to RTC chips, EEPROM expansion, and digital temperature sensors, while the USART links to RS-485 transceivers for networked nodes. The Power-save mode with an asynchronous timer keeps real-time clocking alive at microamp-scale current, and Power-down mode drops consumption further between scheduled sampling windows. Its 512 B EEPROM stores calibration constants and node addresses that survive power cycles, which is essential for plug-and-play field installation.
推荐
Legacy AVR System Maintenance
The ATMEGA8535L-8MUR is a primary choice for maintaining legacy ATmega8535-based systems because it remains in active lifecycle status per distributor listings as of 2026-09-19 and is still stocked by DigiKey, Mouser, and LCSC. It is firmware-identical to the original ATmega8535L, so existing hex files load without recompilation via SPI ISP. The VQFN pad layout matches the original 44-pad MLF footprint, making it a direct reflow replacement. For boards facing end-of-life sourcing risk, qualifying the pin-compatible ATmega8535-16MI provides a second-source path.
推荐
Battery-Powered Portable Instruments
For portable instruments, the ATMEGA8535L-8MUR combines a 2.7 V minimum supply with the ATmega8535 family's six sleep modes, letting designers run from two alkaline cells or a single Li-ion cell through a simple regulator. ADC Noise Reduction mode keeps only the ADC and clock alive during measurements, improving conversion accuracy while extending runtime; Power-down mode supports years of shelf life between use. The 8 MHz grade keeps switching losses low, and the 32 I/O lines drive displays, keypads, and sensor front ends in a single 7 x 7 mm QFN package.
推荐
推荐产品汇总
工程参考数据： ATMEGA8535L-8MUR ——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 | ATMEGA8535-16MI | ATMEGA16L-8MUR | ATMEGA32L-8MUR | ATMEGA8515L-8MUR |
|---|---|---|---|---|---|
| Package | 44-VQFN (7x7) | 44-VQFN (7x7) - same | 44-VQFN (7x7) - same | 44-VQFN (7x7) - same | 44-VQFN (7x7) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Clock Speed | 8 MHz | 16 MHz | 8 MHz | 8 MHz | 8 MHz |
| Supply Voltage | 2.7 V - 5.5 V | 4.5 V - 5.5 V | 2.7 V - 5.5 V | 2.7 V - 5.5 V | 2.7 V - 5.5 V |
| Flash Memory | 8 KB | 8 KB | 16 KB | 32 KB | 8 KB |
| SRAM | 512 B | 512 B | 1 KB | 2 KB | 512 B |
| ADC | 8-channel, 10-bit | 8-channel, 10-bit | 8-channel, 10-bit | 8-channel, 10-bit | None |
| JTAG Debug | No | No | Yes | Yes | No |
| Firmware Compatibility | Baseline (ATmega8535L) | Fully compatible (same die) | Porting required | Porting required | Compatible only if ADC unused |
关键差异点
- Lowest supply voltage in the ATmega8535 family （对比 ATMEGA8535-16MI)
- Cost-effective 8 KB option versus larger pin-compatibles （对比 ATMEGA32L-8MUR)
- Integrated 8-channel ADC absent from closest sibling （对比 ATMEGA8515L-8MUR)
设计说明
Decouple VCC and AVCC separately: place a 100 nF ceramic capacitor directly across each VCC pad to the ground return and a second 100 nF plus optional 10 uF on AVCC. AVCC powers the ADC, so tie it to VCC through a low-pass RC (e.g., 10 ohm + 100 nF) when switching loads share the 5 V rail; this suppresses digital noise from the PWM timers reaching the 10-bit converter. Keep AREF decoupled with 100 nF and never drive AREF externally while the internal reference is selected, per the ATmega8535 datasheet analog section.
The 44-pad QFN/MLF lands on the PCB center pad array; connect the die-attached pad (if used as ground) to the ground plane with a 4x4 via array to improve thermal and ground integrity. Use via-in-pad or fanout dogbones for the perimeter pads with 0.25-0.3 mm via stubs for rework access. Keep the RESET trace short and pull it up with 10 kohm for reliable ISP programming, and route XTAL1/XTAL2 as short as possible with the crystal's load capacitors placed within 2 mm of the pads.
Respect the speed-versus-voltage derating: the L grade supports 0 to 8 MHz across 2.7 V to 5.5 V, but if you substitute the ATMEGA8535-16MI, the supply must be 4.5 V to 5.5 V or the device may misbehave. This generation has no JTAG, so plan debug around ISP and serial output before layout freeze. Also note that brown-out detection settings and fuse bits differ between ATmega families; re-verify fuse configuration (clock source, BOD level, SPIEN) when porting firmware to ATmega16/32 pin-compatibles.
合规信息
Compliance statuses were not stated in the provided web data; confirm on the Microchip product page or distributor environmental data before procurement.
