ATMEGA8535L-8MC - 8MHz AVR MCU, 8KB Flash | Microchip
MPN: ATMEGA8535L-8MC ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.36 | $336.00 |
| 500 | $3.02 | $1,510.00 |
| 1,000 | $2.68 | $2,680.00 |
ATMEGA8535L-8MC Overview
An 8-bit AVR microcontroller is a single-chip Harvard-architecture processor that executes most of its 130 instructions in a single clock cycle, sitting within the power-management/embedded-control hierarchy as a complete MCU: CPU core, program Flash, data SRAM, EEPROM, timers, ADC, and serial interfaces in one package. The ATmega8535 belongs to the classic ATmega family that also includes the ATmega8515 and ATmega16, all sharing the AVR RISC core and similar peripheral sets.
Key features include 32 general-purpose working registers with full static operation, two 8-bit timers and one 16-bit timer with PWM, an 8-channel 10-bit A/D converter, a programmable serial USART, SPI interface, and the two-wire serial interface (I2C-compatible). The self-programming Flash enables in-system programming and bootloader firmware updates without a programmer socket.
The L suffix designates the low-voltage speed grade: 2.7 V to 5.5 V operation at 0-8 MHz, while the standard ATmega8535 runs 0-16 MHz at 4.5-5.5 V. Six software-selectable sleep modes (Idle, ADC Noise Reduction, Power-save, Power-down, Standby, Extended Standby) support battery-operated designs. The MC suffix indicates the commercial temperature grade in the 44-pad QFN/MLF package.
Typical applications include industrial sensor nodes using the 8-channel ADC, motor control and PWM actuation, battery-powered instruments, and general embedded control where compact 7 x 7 mm surface-mount packaging is required.
For design, decouple VCC/AVCC with 100 nF ceramics placed within 2 mm of the pads, and tie the exposed pad to a ground pour for thermal and EMC performance. Verify that 8 MHz operation is sufficient for your ISR budget, since the 16 MHz ATmega8535 grades are not pin-different.
This page synthesizes distributor availability, drop-in same-package alternatives, pricing context, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for ATMEGA8535L-8MC — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ATMEGA8535L-8MC (same form factor and footprint) — differing in Package, SRAM, Core Architecture, EEPROM, Maximum Clock Frequency.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATMEGA8535L-8MI
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.75 / Unit
View Datasheet →ATMEGA8535L-8MU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$3.95 / Unit
View Datasheet →ATMEGA8535-16MI
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$3.35 / Unit
View Datasheet →ATMEGA8515L-8MC
✅ Drop-In✓ In Stock
$2.72 / Unit
View Datasheet →ATMEGA16L-8MC
✅ Drop-In✓ In Stock
$2.21 / Unit
View Datasheet →ATMEGA8535L-8MC Maximum Ratings & Electrical Characteristics
| Core Architecture | AVR 8-bit RISC |
| Flash Program Memory | 8 KB (4K x 16) |
| SRAM | 512 B |
| EEPROM | 512 B |
| Maximum Clock Frequency | 8 MHz |
| Throughput | Up to 8 MIPS at 8 MHz |
| Operating Voltage Range | 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) |
| Sleep Modes | 6 (Idle, ADC Noise Reduction, Power-save, Power-down, Standby, Extended Standby) |
| Package | 44-pad QFN/MLF (7 x 7 mm, 0.5 mm pitch), exposed pad |
| Mounting Type | Surface Mount |
| Temperature Grade | Commercial (C), 0C to +70C |
ATMEGA8535L-8MC 44-pad qfn/mlf (7 x 7 mm, 0.5 mm pitch), exposed pad Pin Configuration Guide
Pin configuration for ATMEGA8535L-8MC (44-pad qfn/mlf (7 x 7 mm, 0.5 mm pitch), exposed pad package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for ATMEGA8535L-8MC.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMEGA8535L-8MC is suitable for 6 applications: Industrial Multi-Channel Data Acquisition, Battery-Powered Portable Instruments, PWM Motor Control and Actuation, Embedded Communication Nodes, Consumer Appliance Control Boards, Education and Legacy AVR Development.
Industrial Multi-Channel Data Acquisition
The ATMEGA8535L-8MC fits industrial data-acquisition nodes because its 8-channel 10-bit ADC can scan up to eight analog sensors - thermistors, pressure bridges, or 0-5 V transducers - without an external multiplexer, and its 2.7-5.5 V supply tolerates unregulated industrial rails. In a typical topology the ADC samples sequentially at up to roughly 15 kSPS while the USART streams readings to a SCADA gateway, with the SPI bus attaching external EEPROM or display drivers. The commercial 0-70C temperature grade and compact 7 x 7 mm QFN/MLF package suit sealed controller boards where board area, not temperature extremes, is the constraint. For wider temperature ranges, the same-footprint ATMEGA8535L-8MI drop-in variant is the recommended substitution.
Recommended
Battery-Powered Portable Instruments
For battery-operated meters and handheld instruments, the ATMEGA8535L-8MC is attractive because its L speed grade regulates from 2.7 V to 5.5 V - covering two alkaline cells through a 9 V battery with a simple LDO - and six sleep modes cut average current dramatically. Power-down and Extended Standby modes stop the CPU between readings while the asynchronous timer or ADC Noise Reduction mode keeps wake-up sources alive, extending battery life in duty-cycled designs. The 512 B EEPROM retains calibration constants across battery swaps, and the TWI interface drives low-power displays. Trade-off: active-mode current at 8 MHz is higher than newer AVR families, so aggressive sleep scheduling is essential in this device.
Recommended
PWM Motor Control and Actuation
The ATMEGA8535L-8MC suits small motor-control and actuation boards using its two 8-bit timers and one 16-bit timer, which generate multiple hardware PWM channels for DC motor drives, servo positioning, and H-bridge control. The 16-bit timer with input-capture reads tachometer or encoder feedback with microsecond resolution, closing speed or position loops at 8 MHz without an external controller. Its 32 I/O lines drive gate drivers and relay logic directly, while the ADC reads current-shunt and back-EMF signals for sensorless schemes. Because switching converters inject noise, route the ADC reference separately and use the ADC Noise Reduction sleep mode during conversions; the 8 MIPS budget is ample for single-motor loops.
Recommended
Embedded Communication Nodes
As a communication node controller, the ATMEGA8535L-8MC combines a hardware USART, an SPI master/slave port, and a TWI (I2C-compatible) interface, allowing a single chip to bridge field buses, sensors, and radios. A common topology uses the USART at up to 115.2 kbaud (at 8 MHz) toward an RS-485 transceiver, the SPI toward an RF module or SD card, and TWI toward a real-time clock and EEPROM. The 8 KB self-programming Flash supports bootloader-based firmware updates over the communication link, eliminating socket reprogramming in deployed nodes. At 8 MIPS the device handles protocol stacking for Modbus-RTU-class traffic; heavier stacks should step to higher-memory ATmega grades.
Recommended
Consumer Appliance Control Boards
In appliance control boards - fans, heaters, small pumps - the ATMEGA8535L-8MC offers a cost-effective combination of 32 I/O lines for keypads, relays, and indicators, plus the 10-bit ADC for temperature sensing (NTC) and user-set potentiometer reading. The 2.7-5.5 V operating range tolerates inexpensive transformer-derived supplies, and Power-down mode meets standby-power targets between duty cycles. The self-programming Flash enables manufacturing-line firmware flashing over UART without a dedicated programmer fixture. The commercial temperature grade (C suffix) matches indoor appliance environments; the compact 44-QFN/MLF footprint conserves PCB area on single-sided cost-sensitive boards. Verify ADC grounding against relay switching transients in layout.
Recommended
Education and Legacy AVR Development
The ATMEGA8535L-8MC remains a staple for teaching AVR architecture and maintaining legacy AVR toolchains: the same 130-instruction AVR RISC core, in-system self-programming, and standard SPI programming interface work with classic ISP programmers and open-source toolchains such as avr-gcc and avrdude. Its 8-channel ADC and abundant timers let students exercise analog, digital, and communication peripherals on one chip, while the 512 B EEPROM demonstrates non-volatile storage. The QFN/MLF package requires hot-plate or reflow soldering, so labs often prototype on the pin-compatible 40-pin PDIP ATMEGA8535-16PJ and port to the MC footprint for production boards. Code compatibility across the family keeps courseware reusable.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA8535L-8MC — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA8535L-8MI | ATMEGA8535L-8MU | ATMEGA8535-16MI | ATMEGA8515L-8MC | ATMEGA16L-8MC |
|---|---|---|---|---|---|---|
| Package | 44-QFN/MLF (7x7 mm) | 44-QFN/MLF (7x7 mm) - same | 44-QFN/MLF (7x7 mm) - same | 44-QFN/MLF (7x7 mm) - same | 44-QFN/MLF (7x7 mm) - same | 44-QFN/MLF (7x7 mm) - same |
| Brand | Microchip Technology (Atmel) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash / SRAM / EEPROM | 8 KB / 512 B / 512 B | 8 KB / 512 B / 512 B | 8 KB / 512 B / 512 B | 8 KB / 512 B / 512 B | 8 KB / 512 B / 512 B | 16 KB / 1 KB / 512 B |
| Maximum Clock / Speed Grade | 8 MHz | 8 MHz | 8 MHz | 16 MHz | 8 MHz | 8 MHz |
| Operating Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 4.5 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| ADC | 8-channel 10-bit | 8-channel 10-bit | 8-channel 10-bit | 8-channel 10-bit | None (no ADC) | 8-channel 10-bit |
| Temperature Grade | Commercial (C) | Industrial (I) | Industrial (U, Pb-free) | Industrial (I) | Commercial (C) | Commercial (C) |
| Firmware Compatibility | Reference | Binary identical | Binary identical | Binary identical (clock-dependent timing) | Recompile; no ADC registers | Recompile; register map differs |
Key Differentiators
- Low-voltage operation down to 2.7 V (vs ATMEGA8535-16MI)
- Integrated 8-channel 10-bit ADC in a compact 7x7 mm footprint (vs ATMEGA8515L-8MC)
Design Notes
Supply the VCC and AVCC pins from the same 2.7-5.5 V rail but decouple them separately: 100 nF ceramics within 2 mm of each pad, plus 4.7-10 uF bulk per rail. Tie AVCC to VCC even when the ADC is unused, per Microchip's datasheet connection guidelines. Estimated: with a typical active-mode current in the low-mA range at 8 MHz, a 3.3 V rail dissipating below 15 mV dropout headroom presents no thermal concern; budget battery capacity from the datasheet active and Power-down currents, not from generic AVR figures.
The exposed pad of the 44-QFN/MLF package should be soldered to a ground pour with an array of thermal vias; the MLF package relies on this pad for grounding and heat spreading, and floating it degrades EMC and ADC accuracy. Keep the 0.5 mm pitch fan-out to via-in-pad or dogbone escapes, and place the crystal within 5 mm of the XTAL pins with guard ground. ADC inputs should be routed away from the switching nodes of any nearby power stage to preserve 10-bit accuracy.
The most common substitution error is mixing speed grades: the ATMEGA8535L-8MC is guaranteed only to 8 MHz at 2.7-5.5 V, while the ATMEGA8535-16MI requires at least 4.5 V - swapping a 16MI into a 3.3 V board violates the datasheet minimum. Also confirm that ADC-based firmware is not ported to the ATMEGA8515L-8MC, which has no ADC despite the same footprint. Finally, verify the C (commercial) temperature grade against enclosure temperatures before production.
Compliance Information
Compliance data was not stated in the retrieved web data. The Pb-free MLF ordering variant for this family is ATMEGA8535L-8MU; confirm RoHS status on the Microchip product page before specifying for regulated markets.
