ATMEGA8535L-8MU - AVR 8-bit MCU 8MHz 8KB Flash | Microchip
N.º da peça: ATMEGA8535L-8MU ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $5.11 | $5,11 |
| 10 | $4.8 | $48,00 |
| 100 | $4.5 | $450,00 |
| 500 | $4.2 | $2.100,00 |
| 1.000 | $3.95 | $3.950,00 |
ATMEGA8535L-8MU Visão geral
An 8-bit AVR microcontroller is a single-chip processor based on the AVR enhanced RISC architecture, in which most instructions execute in a single clock cycle. Within the semiconductor hierarchy, the ATMEGA8535L-8MU belongs to the ATmega family -> AVR 8-bit MCU -> microcontroller unit (MCU) -> embedded processor. Its Harvard architecture with separate program and data buses gives it throughput roughly ten times faster per megahertz than comparable CISC microcontrollers.
Key features include 130 powerful instructions (most single-cycle), 32 general-purpose working registers, 32 programmable I/O lines, three timers (two 8-bit, one 16-bit with PWM output compare), an 8-channel 10-bit analog-to-digital converter, USART serial port, SPI interface, two-wire (I2C-compatible) interface, and an analog comparator. The L suffix denotes an extended operating voltage of 2.7 V to 5.5 V, while the 8 speed grade permits clock frequencies from 0 to 8 MHz.
Technically, the ATmega8535 provides six software-selectable power-saving sleep modes (Idle, ADC Noise Reduction, Power-save, Power-down, Standby, Extended Standby), internal and external interrupt sources, and on-chip debugging via JTAG. Self-programmable Flash enables boot-loader-based field updates, and lock bits protect code IP.
Typical applications include industrial control systems, battery-powered instrumentation, motor control front ends using the 10-bit ADC, and legacy AT90S8535 board upgrades - the ATmega8535 is pin compatible with the earlier AT90S8535.
Design consideration: for battery designs, exploit Power-down mode with the asynchronous Timer/Counter2 oscillator to cut standby current to microamp levels; note the JTAG-enable fuse should be disabled when pins PC2-PC5 are needed as general I/O.
This page synthesizes verified distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.
Alternativas drop-in para ATMEGA8535L-8MU — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com ATMEGA8535L-8MU (mesmo formato e footprint) — diferindo em Package, Throughput, EEPROM, SRAM, Maximum Clock Frequency.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
ATMEGA8535L-8MUR
✅ Drop-In✓ Em estoque
$1.05 / unidade
Ver ficha técnica →ATMEGA8535-16MI
✅ Drop-In✓ Em estoque
$3.35 / unidade
Ver ficha técnica →ATMEGA8535L-8MU Classificações máximas e características elétricas
| Core Architecture | 8-bit AVR RISC |
| Frequência máxima de clock | 8 MHz |
| Flash Memory | 8 KB (4K x 16) |
| SRAM | 512 B |
| EEPROM | 512 B |
| MIPS Throughput | 8 MIPS at 8 MHz (up to 16 MIPS at 16 MHz family rating) |
| Supply Voltage Range (ATmega8535L) | 2.7 V to 5.5 V |
| ADC | 8-channel 10-bit |
| Programmable I/O Lines | 32 |
| Timers | Two 8-bit, one 16-bit |
| Serial Interfaces | USART, SPI, TWI (I2C-compatible) |
| Analog Comparator | Yes, on-chip |
| Sleep Modes | Idle, ADC Noise Reduction, Power-save, Power-down, Standby, Extended Standby |
| Encapsulamento | 44-VQFN / MLF (7 x 7 mm), 1 mm height, 0.8 mm pitch |
| Tipo de montagem | Surface Mount |
| Programming Interfaces | SPI in-circuit programming; JTAG |
| Life Cycle Stage | Active |
| Status RoHS | Compliant |
Guia de Configuração de Pinos do ATMEGA8535L-8MU 44-vqfn / mlf (7 x 7 mm), 1 mm height, 0.8 mm pitch
Configuração de pinos para ATMEGA8535L-8MU (pacote 44-vqfn / mlf (7 x 7 mm), 1 mm height, 0.8 mm pitch). Este CI digital inclui GPIO, interfaces de comunicação (UART, SPI, I2C) e pinos de alimentação. Consulte o datasheet do fabricante para funções alternativas dos pinos e opções de configuração. Essencial para projeto de sistemas embarcados e layout de PCB.
Nenhum dado detalhado de pinagem disponível para ATMEGA8535L-8MU.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
ATMEGA8535L-8MU é adequado para 6 aplicaçãos: Industrial Control Systems, Battery-Powered Instrumentation, Motor Control and PWM Drive, AT90S8535 Legacy Board Upgrades, Sensor Hubs and Data Acquisition, Embedded Education and Prototyping.
Industrial Control Systems
The ATMEGA8535L-8MU fits industrial control nodes because its 32 programmable I/O lines, three timers with PWM outputs, and 8-channel 10-bit ADC let one chip handle sensor acquisition, keypad input, and actuator drive simultaneously. The AVR core executes most of its 130 instructions in a single cycle, giving deterministic 8 MIPS performance at the 8 MHz rating for control loops. Operation across 2.7-5.5 V tolerates unregulated industrial supplies, and the TWI and SPI interfaces connect external expanders or displays. In relay- and motor-heavy panels, place the MCU away from switching loads and use the ADC noise reducer mode for accurate analog readings; the watchdog timer adds fail-safe recovery.
Recomendado
Battery-Powered Instrumentation
For portable meters and dataloggers, the ATMEGA8535L-8MU's 2.7 V minimum supply allows direct operation from two alkaline cells, while Power-down and Power-save sleep modes drop current to microamp levels between measurements. The 8-channel 10-bit ADC digitizes multiple sensor channels without external converters, and the ADC Noise Reduction sleep mode suppresses digital noise during conversions for cleaner low-level readings. The 512 B EEPROM stores calibration constants that survive battery removal. Typical topology: MCU sleeps between sample intervals, wakes via the asynchronous Timer/Counter2 or an external interrupt, samples, and stores to EEPROM or transmits via USART. Duty-cycling from sleep rather than idling is the key power trade-off.
Recomendado
Motor Control and PWM Drive
The 16-bit Timer/Counter1 of the ATMEGA8535L-8MU provides two high-resolution PWM outputs (OC1A/OC1B) plus the 8-bit Timer/Counter0 PWM channel, making it well suited for DC motor and servo control. Its input-capture unit (ICP1) measures external event timing or back-EMF with 62.5 ns resolution at 8 MHz, while the analog comparator supports zero-crossing detection for sensorless fan or motor control. The 8-channel 10-bit ADC reads current-sense resistors for closed-loop torque regulation. Design consideration: at 5 V the output pins source/sink up to 20 mA, sufficient for logic-level MOSFET gates, but gate-drive series resistors and a local decoupling network are needed to keep switching noise out of the ADC ground reference.
Recomendado
AT90S8535 Legacy Board Upgrades
The ATmega8535 family was explicitly designed as the successor to the AT90S8535, and Microchip documents it as pin compatible with that earlier device, allowing direct replacement on existing PCBs - including boards built for the discontinued AT90S8535. The ATMEGA8535L-8MU brings larger Flash (8 KB), an improved ADC, JTAG debugging, and boot-loader self-programming to legacy hardware without layout changes, provided the board's supply supports 4.5-5.5 V operation as the original part required. Programming the S8535C fuse enables AT90S8535 compatibility mode covering fuse-bit and electrical differences. Firmware requires recompilation because fuse locations differ; timing-critical code should be re-verified against the 8 MHz L speed grade.
Recomendado
Sensor Hubs and Data Acquisition
With an 8-channel 10-bit ADC (up to roughly 15 kSPS at full resolution per the ATmega8535 family), TWI, SPI, and USART on one die, the ATMEGA8535L-8MU serves as a compact sensor-hub controller gathering analog, I2C, and SPI sensor data and forwarding it over a serial link. AREF/AVCC/AGND pin provisions allow a clean external reference for precise conversions, and the on-chip analog comparator provides a hardware threshold detector that offloads alarm detection from software. Six sleep modes let the hub idle between acquisition bursts to save power in remote monitoring nodes. Layout guidance: star-ground the analog pins, add 100 nF decoupling on AVCC, and keep ADC traces short to exploit the converter's full 10-bit accuracy.
Recomendado
Embedded Education and Prototyping
The ATmega8535 architecture is a classic teaching platform: its clean AVR RISC core, 32 registers, USART/SPI/TWI peripherals, and 10-bit ADC cover the full embedded curriculum in one chip, and low single-unit pricing (about $5.11 as of 2026-09-19) suits student kits. In-circuit SPI programming means learners can flash code repeatedly through a simple ISP header without special sockets, while JTAG gives advanced students hardware debugging experience. The 44-pad MLF package requires care on first PCB builds - consider the TQFP/PDIP siblings (ATMEGA8535-16PJ, ATMEGA8535-16AU) for hand-soldered prototype boards, then move to the MLF part for the production revision, reusing the identical firmware.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ATMEGA8535L-8MU — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | ATMEGA8535L-8MUR | ATMEGA8535-16MI |
|---|---|---|---|
| Package | 44-VQFN / MLF (7x7) | 44-VQFN / MLF (7x7) - same | 44-VQFN / MLF (7x7) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Clock Speed | 8 MHz | 8 MHz | 16 MHz |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 4.5 V to 5.5 V |
| Flash Memory | 8 KB | 8 KB | 8 KB |
| SRAM / EEPROM | 512 B / 512 B | 512 B / 512 B | 512 B / 512 B |
| ADC | 8-channel 10-bit | 8-channel 10-bit | 8-channel 10-bit |
Principais diferenciais
- Extended 2.7 V low-voltage operation (vs ATMEGA8535-16MI)
- Cost-effective at low clock requirements (vs ATMEGA8535-16MI)
- Reel packaging for production (vs ATMEGA8535L-8MUR)
Notas de projeto
Decouple VCC and AVCC independently: place a 100 nF ceramic capacitor directly at each VCC pad and a separate 100 nF on AVCC, connected to analog ground through a small LC or RC filter. AVCC must stay within 0.3 V of VCC, and if the ADC is unused AVCC should still be tied to VCC per the Microchip ATmega8535 datasheet. For battery designs at 3 V, verify the 8 MHz speed grade is valid at the lowest cell voltage since fast clock operation requires adequate supply margin.
The 44-pad MLF (7x7 mm) package requires an exposed center pad that should be soldered to a grounded thermal land for mechanical reliability - it is not a heatsink requirement but omission causes poor yield in reflow. Route AREF with a dedicated quiet ground return and keep the crystal (XTAL1/XTAL2) loops short with guard ground. Because MLF pads sit under the package, add via-in-pad or thermal vias to the center pad for inspectable solder joints.
Three frequent ATmega8535 pitfalls: (1) JTAG is fuse-enabled by default, blocking PC2-PC5 as general I/O - disable the JTAGEN fuse if all of Port C is needed. (2) The L suffix is required for 3 V operation; the non-L ATMEGA8535-16MI only guarantees 4.5-5.5 V, so substituting it on a 3.3 V board will fail. (3) The device is pin compatible with AT90S8535, but fuse locations and some electrical characteristics differ - recompile and re-verify firmware rather than reusing old fuse settings when migrating.
Informações de conformidade
RoHS compliant per distributor listings; full material-declaration details available from Microchip product page.
