ATMEGA8535L-8AC - 8MHz AVR MCU, 8KB Flash, TQFP-44 | Microchip
MPN: ATMEGA8535L-8AC ✓ فعالATMEGA8535L-8AC جائزہ
An AVR ATmega microcontroller is a member of the 8-bit microcontroller (MCU) family built on the AVR enhanced RISC architecture, which sits within the broader hierarchy of embedded processors used for sensing, control, and human-interface functions. AVR cores execute most of their 130 instructions in a single clock cycle, giving high code efficiency and deterministic timing for real-time embedded control.
Key features include 32 general purpose I/O lines, three flexible Timer/Counters with compare modes, a programmable serial USART, a byte-oriented Two-Wire Interface (TWI/I2C), and an SPI serial port. The L suffix denotes the wide 2.7 V to 5.5 V operating voltage range, allowing the same design to run from 3.3 V or 5 V rails at 0 to 8 MHz.
Architecturally, the device pairs the AVR RISC core with separate program and data buses (Harvard architecture), 32 general purpose working registers, and Read-While-Write self-programming Flash. Six sleep modes (Idle, ADC Noise Reduction, Power-save, Power-down, Standby, Extended Standby) cut quiescent draw dramatically in battery applications, and the 8-channel 10-bit ADC with internal reference supports direct analog sensor interfacing.
Typical applications include industrial control panels, sensor acquisition nodes using the ADC plus TWI/SPI peripherals, and motor or relay control systems where the three timers generate PWM outputs.
When designing, budget SRAM carefully - 512 bytes fills quickly with large buffers or deep call stacks - and validate brown-out/fuse settings for reliable 5 V operation.
This page synthesizes distributor pricing context, drop-in alternatives, pinout, and practical design notes not found in the manufacturer datasheet.
کے لیے ڈراپ اِن متبادل ATMEGA8535L-8AC — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں ATMEGA8535L-8AC (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Package, SRAM, Operating Temperature, RoHS Status, Core Architecture.
ATMEGA8535L-8AUR
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
ATMEGA8535-16AU
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ATMEGA8535-16MI
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ATMEGA16L-8AI
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ATMEGA8515L-8AI
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ATMEGA8535L-8AC زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Core | 8-bit AVR RISC |
| Program Memory (Flash) | 8 KB (4K x 16) |
| Flash Type | In-System Programmable, Read-While-Write |
| SRAM | 512 bytes |
| EEPROM | 512 bytes |
| زیادہ سے زیادہ کلاک فریکوئنسی | 8 MHz |
| Operating Voltage Range | 2.7 V to 5.5 V |
| ADC | 8-channel, 10-bit |
| General Purpose I/O | 32 lines |
| Timers/Counters | 3 (two 8-bit, one 16-bit with compare modes) |
| USART | 1 x programmable serial USART |
| SPI | 1 x serial peripheral interface |
| TWI (I2C) | 1 x byte-oriented Two-Wire Serial Interface |
| Sleep Modes | 6 (Idle, ADC Noise Reduction, Power-save, Power-down, Standby, Extended Standby) |
| پیکیج | 44-TQFP (10x10 mm) |
| ماؤنٹنگ ٹائپ | Surface Mount |
| RoHS اسٹیٹس | Compliant (green per FindIC listing) |
ATMEGA8535L-8AC پن کنفیگریشن
| پن 1 | PA7 (ADC7) — Port A bit 7 / ADC channel 7 |
| پن 2 | PA6 (ADC6) — Port A bit 6 / ADC channel 6 |
| پن 3 | PA5 (ADC5) — Port A bit 5 / ADC channel 5 |
| پن 4 | PA4 (ADC4) — Port A bit 4 / ADC channel 4 |
| پن 5 | PA3 (ADC3) — Port A bit 3 / ADC channel 3 |
| پن 6 | PA2 (ADC2) — Port A bit 2 / ADC channel 2 |
| پن 7 | PA1 (ADC1) — Port A bit 1 / ADC channel 1 |
| پن 8 | PA0 (ADC0) — Port A bit 0 / ADC channel 0 |
| پن 9 | GND — Ground |
| پن 10 | VCC — Digital supply voltage (2.7 V to 5.5 V) |
| پن 11 | PB0 (XCK/T0) — Port B bit 0 / USART external clock / Timer0 external clock |
| پن 12 | PB1 (T1) — Port B bit 1 / Timer1 external clock |
| پن 13 | PB2 (AIN0/INT2) — Port B bit 2 / analog comparator positive input / external interrupt 2 |
| پن 14 | PB3 (AIN1/OC0) — Port B bit 3 / analog comparator negative input / Timer0 output compare |
| پن 15 | PB4 (SS) — Port B bit 4 / SPI slave select |
| پن 16 | PB5 (MOSI) — Port B bit 5 / SPI master output slave input |
| پن 17 | PB6 (MISO) — Port B bit 6 / SPI master input slave output |
| پن 18 | PB7 (SCK) — Port B bit 7 / SPI serial clock |
| پن 19 | RESET — Active-low reset input |
| پن 20 | VCC — Digital supply voltage |
| پن 21 | GND — Ground |
| پن 22 | XTAL2 — Crystal oscillator output |
| پن 23 | XTAL1 — Crystal oscillator input / external clock |
| پن 24 | PD0 (RXD) — Port D bit 0 / USART receive |
| پن 25 | PD1 (TXD) — Port D bit 1 / USART transmit |
| پن 26 | PD2 (INT0) — Port D bit 2 / external interrupt 0 |
| پن 27 | PD3 (INT1) — Port D bit 3 / external interrupt 1 |
| پن 28 | PD4 (OC1B) — Port D bit 4 / Timer1 output compare B |
| پن 29 | PD5 (OC1A) — Port D bit 5 / Timer1 output compare A |
| پن 30 | PD6 (ICP1) — Port D bit 6 / Timer1 input capture |
| پن 31 | PD7 (OC2) — Port D bit 7 / Timer2 output compare |
| پن 32 | AREF — ADC analog reference |
| پن 33 | AGND — Analog ground |
| پن 34 | AVCC — ADC supply voltage |
| پن 35 | PC0 (SCL) — Port C bit 0 / TWI serial clock |
| پن 36 | PC1 (SDA) — Port C bit 1 / TWI serial data |
| پن 37 | PC2 (TCK) — Port C bit 2 / JTAG test clock |
| پن 38 | PC3 (TMS) — Port C bit 3 / JTAG test mode select |
| پن 39 | PC4 (TDO) — Port C bit 4 / JTAG test data output |
| پن 40 | PC5 (TDI) — Port C bit 5 / JTAG test data input |
| پن 41 | PC6 (TOSC1) — Port C bit 6 / Timer2 oscillator input |
| پن 42 | PC7 (TOSC2) — Port C bit 7 / Timer2 oscillator output |
| پن 43 | GND — Ground |
| پن 44 | VCC — Digital supply voltage |
عام استعمالات
ATMEGA8535L-8AC کے لیے موزوں ہے 6 ایپلیکیشنs: Industrial Control Panels, Analog Sensor Acquisition Nodes, Embedded Motor and Relay Control, Battery-Powered Instruments, Communication and Data Logging, Automotive Aftermarket and Test Fixtures.
Industrial Control Panels
The ATMEGA8535L-8AC fits industrial panel controllers because its 2.7 V to 5.5 V tolerance rides through unregulated 5 V logic supplies while its 32 GPIO lines drive relays, indicators, and keypads directly. The three Timer/Counters with compare modes generate PWM for actuator positioning, and the USART links to SCADA gateways at standard baud rates from the 8 MHz clock. Six sleep modes cut standby draw in always-on panels, and the 8 KB self-programming Flash permits field firmware updates over the existing serial link without a separate bootloader chip, reducing BOM cost in serviceable installations.
تجویز کردہ
Analog Sensor Acquisition Nodes
With an 8-channel 10-bit ADC on Port A, the ATMEGA8535L-8AC digitizes up to eight analog sensors directly - thermistors, strain bridges, and potentiometers - without an external converter. Running in the ADC Noise Reduction sleep mode suppresses digital switching noise during conversions for cleaner readings, and AREF/AGND/AVCC pins allow a precise external reference when sub-1% accuracy is required. Sampled data is timestamped by the 16-bit Timer/Counter, buffered in the 512-byte SRAM, and uploaded via TWI or SPI to a gateway, making the part a compact, single-chip front end for distributed monitoring nodes.
تجویز کردہ
Embedded Motor and Relay Control
The 16-bit Timer/Counter with two compare outputs (OC1A/OC1B on Port D) gives the ATMEGA8535L-8AC hardware PWM for DC motor speed control and servo positioning, while the external interrupt pins (INT0/INT1) capture encoder or limit-switch events with deterministic latency. Port B supports direct relay driver logic through ULN-class transistors, and the byte-oriented TWI interface supervises power-management ICs over I2C. Operating the L-grade die from 2.7 V to 5.5 V lets the same controller PCB serve both 3.3 V logic ecosystems and legacy 5 V industrial drivers without redesign of the supply section.
تجویز کردہ
Battery-Powered Instruments
The L-grade voltage window of 2.7 V to 5.5 V lets the ATMEGA8535L-8AC run directly from a 3 V lithium coin cell or two AA cells without a regulator, while six sleep modes - Power-down, Standby, Extended Standby, Idle, ADC Noise Reduction, and Power-save - slash average current between measurements. The 512-byte EEPROM stores calibration constants and user settings across battery replacement, and the wake-on-USART/TWI capability supports burst data uploads. Designs must budget the small SRAM for state rather than deep buffering, but for periodic sampling instruments the power profile and on-chip ADC eliminate the need for a companion converter or supervisor IC.
تجویز کردہ
Communication and Data Logging
A programmable USART, an SPI port, and a byte-oriented TWI interface give the ATMEGA8535L-8AC three simultaneous serial channels, enough for a data logger that records locally to EEPROM/external SPI flash while streaming to a host over RS-232/RS-485. The 8 MHz L-grade clock derives standard baud rates from a crystal on XTAL1/XTAL2 with low error, and Read-While-Write Flash allows logging into program-flash sectors or bootloader updates without stopping acquisition. Designs must respect the 512-byte SRAM ceiling by streaming records promptly, but the single-chip integration of interface plus timers makes compact multi-protocol logging hardware practical.
تجویز کردہ
Automotive Aftermarket and Test Fixtures
In off-core automotive aftermarket modules and production test fixtures, the ATMEGA8535L-8AC's fully static core tolerates noisy 5 V vehicle-logic supplies within its 2.7 V to 5.5 V window, and brown-out plus watchdog supervision maintain code integrity during cranking transients. The 8-channel 10-bit ADC reads analog test points, the timers emulate pulse-train sensor signals, and the USART bridges to bench PCs for logging. Its 44-TQFP footprint, also offered in industrial-grade L variants and the pin-compatible ATMEGA16L upgrade, gives fixture builders a stable, multi-source-adjacent controller platform that survives long tooling lifetimes with minimal redesign.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا ATMEGA8535L-8AC — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | ATMEGA8535L-8AUR | ATMEGA8535-16AU | ATMEGA16L-8AI | ATMEGA8515L-8AI |
|---|---|---|---|---|---|
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same |
| Brand | Microchip Technology (Atmel) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash | 8 KB | 8 KB | 8 KB | 16 KB | 8 KB |
| SRAM | 512 bytes | 512 bytes | 512 bytes | 1 KB | 512 bytes |
| EEPROM | 512 bytes | 512 bytes | 512 bytes | 512 bytes | 512 bytes |
| Max Clock | 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 | 4.5 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| 10-bit ADC Channels | 8 | 8 | 8 | 8 | None (no ADC) |
| Pin Compatibility | AVR 44-TQFP baseline | Pin-to-pin identical | Pin-to-pin identical | Pin-to-pin identical | Pin-to-pin identical |
اہم امتیازی خصوصیات
- Wide 2.7 V to 5.5 V L-grade window (بمقابلہATMEGA8535-16AU)
- Integrated 8-channel 10-bit ADC (بمقابلہATMEGA8515L-8AI)
- 8 KB Flash ceiling (بمقابلہATMEGA16L-8AI)
ڈیزائن نوٹس
The 512-byte SRAM is the tightest resource on this part. Deep C call stacks plus string libraries (printf) can overflow silently into the hardware stack and corrupt data. Estimate worst-case stack depth at design time, keep ISR nesting to one level, and enable a software stack-overflow canary in debug builds. If buffers must grow, prefer streaming data out over TWI/USART immediately rather than accumulating in SRAM, or migrate to the pin-compatible ATMEGA16L-8AI with 1 KB SRAM.
Fuse configuration governs reliability and power: enable the brown-out detector (BOD) for 5 V operation to prevent Flash corruption during supply dips, and select the appropriate BOD threshold for 3.3 V rails per the datasheet's voltage-to-threshold table. For battery designs, use Power-down sleep plus the external interrupt or watchdog wake-up; measured active current scales directly with clock, so drop to a 32.768 kHz TOSC clock on PC6/PC7 during idle periods. Estimated: at 8 MHz active versus Power-down, duty-cycled systems see orders-of-magnitude average-current reductions.
Keep AVCC connected to VCC through a low-pass LC network (for example 10 uH and 100 nF, per datasheet typical schematic) even if the ADC is unused, and never leave AVCC or AGND floating. Place a 100 nF ceramic decoupling capacitor at each VCC pin (10, 20, 44) within a few millimeters of the pad, and route AREF with its own 100 nF to AGND away from digital clock traces. XTAL1/XTAL2 crystal loading capacitors should follow the crystal vendor's specified CL, typically 12-22 pF.
Port A doubles as the ADC input, so minimize digital switching and series-resistor protection mismatch on PA0-PA7 in analog designs; the datasheet recommends keeping source impedance below 10 kilo-ohm for accurate 10-bit sampling within the ADC clock budget. Set the ADC prescaler so the ADC clock lands in its recommended 50-200 kHz window for full 10-bit resolution - running it faster trades resolution for speed.
تعمیل کی معلومات
Listed as GREEN (lead-free/RoHS) on distributor listings including FindIC. AEC-Q100 qualification not claimed for this part number; confirm with Microchip for automotive use.