ATMEGA8-16MUR - 8KB Flash 16MHz AVR MCU | Microchip
MPN: ATMEGA8-16MUR ✓ نشطATMEGA8-16MUR نظرة عامة
An 8-bit microcontroller integrates a CPU core, program memory, data memory, and peripherals such as timers, UART, SPI, and ADC on a single silicon die, forming the lowest tier of the embedded processor hierarchy (MCU -> embedded processor -> SoC). Microchip's AVR architecture executes most of its 130 powerful instructions in a single clock cycle, delivering up to 16 MIPS at 16 MHz.
Key features include the advanced RISC AVR core with 32 general-purpose working registers, a 6 or 8 channel 10-bit ADC, in-system self-programmable Flash for field firmware updates, and industrial temperature grade (IND) qualification per the Mouser listing. The exposed pad improves thermal and ground performance in the compact 5x5 mm footprint.
Technical depth: the ATmega8 Harvard architecture separates program and data buses, allowing simultaneous fetch and execution. Two-wire Interface (I2C-compatible), USART, and SPI serial interfaces cover most connectivity needs, while three PWM channels support motor and LED control. Data retention of Flash and EEPROM is specified for 20 years at 85C per Atmel/Microchip documentation.
Typical applications include industrial control nodes, consumer appliances, sensor interfaces using the 10-bit ADC, and hobby/embedded products requiring 5V operation at 4.5 V to 5.5 V supply.
Design consideration: program the fuse bits correctly for clock source selection; the device ships calibrated for internal RC oscillator, but external crystal on PB6/PB7 is required for full 16 MHz accuracy tolerance.
This page synthesizes distributor pricing, drop-in alternatives, pinout data, and design notes not found on any single distributor page.
بدائل مباشرة لـ ATMEGA8-16MUR — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع ATMEGA8-16MUR (نفس عامل الشكل والبصمة) — يختلف في Package, Communication Interfaces, Operating Temperature, ADC Resolution, EEPROM.
ATMEGA8A-MUR
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA88-15MT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA48PA-MUR
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA168PA-MUR
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA328P-MUR
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA8-16MUR الحدود القصوى والخصائص الكهربائية
| Core Architecture | AVR 8-bit RISC |
| Core Size | 8-bit |
| أقصى تردد للساعة | 16 MHz |
| Program Memory Size | 8 KB (4K x 16) Flash |
| EEPROM Size | 512 B |
| SRAM Size | 1 KB |
| Supply Voltage Range | 4.5 V to 5.5 V |
| I/O Ports | 23 |
| ADC Resolution | 10-bit, 6 or 8 channel |
| Execution Performance | Up to 16 MIPS at 16 MHz |
| Instruction Set | 130 powerful instructions, most single-cycle |
| العلبة | 32-VQFN (5x5 mm) Exposed Pad (MLF-32) |
| نوع التركيب | Surface Mount |
| درجة حرارة التشغيل | -40C to +85C (Industrial) |
| حالة دورة الحياة | Active |
| Programming Interface | ICSP (In-Circuit Serial Programming) |
تكوين أطراف ATMEGA8-16MUR
| دبوس 1 | PD3 — Port D, bit 3 (GPIO / INT1) |
| دبوس 2 | PD4 — Port D, bit 4 (GPIO / XCK/T0) |
| دبوس 3 | GND — Ground |
| دبوس 4 | VCC — Digital supply voltage |
| دبوس 5 | GND — Ground |
| دبوس 6 | VCC — Digital supply voltage |
| دبوس 7 | PB6/XTAL1/TOSC1 — Port B bit 6 / crystal oscillator input / timer oscillator |
| دبوس 8 | PB7/XTAL2/TOSC2 — Port B bit 7 / crystal oscillator output / timer oscillator |
| دبوس 9 | PD5 — Port D, bit 5 (GPIO / T1 / OC1A) |
| دبوس 10 | PD6 — Port D, bit 6 (GPIO / AIN0) |
| دبوس 11 | PD7 — Port D, bit 7 (GPIO / AIN1) |
| دبوس 12 | PB0 — Port B, bit 0 (GPIO / ICP1) |
| دبوس 13 | PB1 — Port B, bit 1 (GPIO / OC1A) |
| دبوس 14 | PB2 — Port B, bit 2 (GPIO / SS / OC1B) |
| دبوس 15 | PB3/MOSI/OC2 — Port B bit 3 / SPI master output / PWM output 2 |
| دبوس 16 | PB4/MISO — Port B bit 4 / SPI master input |
| دبوس 17 | PB5/SCK — Port B bit 5 / SPI clock |
| دبوس 18 | AVCC — ADC supply voltage |
| دبوس 19 | ADC6 — ADC input channel 6 |
| دبوس 20 | AREF — ADC analog reference |
| دبوس 21 | GND — Ground |
| دبوس 22 | ADC7 — ADC input channel 7 |
| دبوس 23 | PC0/ADC0 — Port C bit 0 / ADC channel 0 |
| دبوس 24 | PC1/ADC1 — Port C bit 1 / ADC channel 1 |
| دبوس 25 | PC2/ADC2 — Port C bit 2 / ADC channel 2 |
| دبوس 26 | PC3/ADC3 — Port C bit 3 / ADC channel 3 |
| دبوس 27 | PC4/ADC4/SDA — Port C bit 4 / ADC channel 4 / TWI data |
| دبوس 28 | PC5/ADC5/SCL — Port C bit 5 / ADC channel 5 / TWI clock |
| دبوس 29 | PC6/RESET — Port C bit 6 / Reset input (active low) |
| دبوس 30 | PD0/RXD — Port D bit 0 / USART receive |
| دبوس 31 | PD1/TXD — Port D bit 1 / USART transmit |
| دبوس 32 | PD2/INT0 — Port D bit 2 / External interrupt 0 |
التطبيقات النموذجية
ATMEGA8-16MUR مناسب لـ 6 التطبيقs: Industrial Control Nodes, Sensor Interfaces with 10-bit ADC, Motor and PWM Control, Serial Communication Gateways, Consumer Appliance Control, Hobby and Educational Embedded Platforms.
Industrial Control Nodes
The ATMEGA8-16MUR fits industrial control nodes because its 5 V supply (4.5-5.5 V) directly matches legacy industrial logic levels, and its 23 I/O lines with 20 mA drive capability interface relays, optocouplers, and 5 V sensors without level shifting. The 16 MHz clock provides 16 MIPS, sufficient for polling loops and simple PID control, while the 10-bit ADC (6/8 channels) reads potentiometers, thermistors, and 0-5 V transducer signals with 4.88 mV resolution. In this role the MCU typically runs a master loop reading the ADC every few milliseconds, communicating over USART or TWI to a supervisory PLC. The industrial -40C to +85C grade ensures reliability on factory floors, and the exposed-pad VQFN package improves ground integrity in electrically noisy environments. Its ICSP interface enables field firmware updates without desoldering.
موصى به
Sensor Interfaces with 10-bit ADC
The ATMEGA8-16MUR is well matched to analog sensor acquisition because its integrated 10-bit successive-approximation ADC offers 6 channels on ports PC0-PC5 plus 2 dedicated channels ADC6/ADC7, delivering 4.88 mV LSB at a 5 V reference. Differential mode with selectable gain measures low-level signals such as bridge sensors and thermocouple conditioners. The AREF pin (pin 20) accepts an external precision reference for better absolute accuracy than the default AVCC reference, and AVCC on pin 18 should be filtered with an LC network per the datasheet for clean analog performance. With 16 MIPS of headroom, the part performs oversampling and averaging to gain effective resolution, then streams results over SPI or TWI to a host. Its 1 KB SRAM supports modest buffering and filtering without external memory.
موصى به
Motor and PWM Control
The ATMEGA8-16MUR suits small motor control applications through its three hardware PWM channels (OC1A, OC1B, OC2) driven by 16-bit Timer/Counter1 and 8-bit Timer/Counter2. At 16 MHz, Timer1 supports phase-correct and fast PWM modes with resolutions up to 16 bits, enabling smooth DC motor speed control and servo positioning at standard 50 Hz frames. The 23 GPIO lines provide direction, enable, and brake signals to H-bridge drivers, and the 10-bit ADC reads back current-sense amplifiers for closed-loop torque limiting. The 5 V rail matches common gate-driver logic thresholds, and the 16 MIPS core can execute a fast inner current loop alongside commutation logic. Input capture on ICP pin simplifies tachometer frequency measurement for closed-loop speed regulation.
موصى به
Serial Communication Gateways
The ATMEGA8-16MUR works well as a protocol gateway because it provides three independent hardware serial interfaces: a USART (pin 2 TX? - PD1 TXD, PD0 RXD), an SPI master/slave (PB3-PB5), and a TWI two-wire interface on PC4/PC5 (I2C-compatible). A typical topology bridges a slow TWI sensor bus to a UART uplink: the 16 MHz clock generates accurate baud rates up to 1 Mbps in double-speed mode with low error percentages across standard rates such as 9600 and 115200 baud per the datasheet baud-rate tables. The 512 B EEPROM stores node addresses and configuration that survive power cycles, while the 8 KB Flash holds dual protocol stacks with room to spare. The exposed-pad package grounds well for EMI-sensitive RS-485 environments.
موصى به
Consumer Appliance Control
In appliance front-panel and control-board designs, the ATMEGA8-16MUR offers the classic cost/performance point: 8 KB Flash holds display scanning, key decoding, and buzzer logic comfortably; 23 I/O pins drive a multiplexed 7-segment or LED matrix directly at up to 20 mA per pin. The 10-bit ADC reads NTC thermistors for temperature cutoffs and user potentiometers, and Timer2's asynchronous mode can run a 32.768 kHz watch crystal for accurate timekeeping during main-clock sleep, keeping average current low. The industrial -40C to +85C rating tolerates kitchen and HVAC environments, and the compact 5x5 mm VQFN saves PCB area in crowded control boards. ICSP programming (via two I/O pins plus reset) supports in-circuit firmware updates on the assembled appliance board.
موصى به
Hobby and Educational Embedded Platforms
The ATMEGA8-16MUR remains a staple of hobby and educational platforms because it is ICSP-programmable with inexpensive tools such as the MPLAB SNAP or classic AVR ISP, using just two I/O pins and the reset line per Microchip documentation. At 16 MHz it executes 16 MIPS, fast enough to teach interrupts, timers, PWM, ADC sampling, and all three serial protocols without hitting performance limits. The 5 V operation makes breadboard use straightforward with USB-serial adapters, and the 8 KB Flash accommodates Arduino-style bootloader code with several KB remaining for the user sketch. The VQFN package requires care in hand soldering, so educational kits typically adapt it via a QFN-to-DIP carrier board; the identical pinout to ATmega48/88/168/328 lets one carrier design serve the whole upgrade path.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ ATMEGA8-16MUR — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | ATMEGA8A-MUR | ATMEGA88-15MT | ATMEGA328P-MUR |
|---|---|---|---|---|
| Package | 32-VQFN (5x5 mm) MLF-32 | 32-VQFN (5x5 mm) MLF-32 - same | 32-QFN MLF-32 - same footprint | 32-VQFN MLF-32 - same footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 8 KB | 8 KB | 8 KB | 32 KB |
| Max Clock Frequency | 16 MHz | 16 MHz | 15 MHz | 20 MHz |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 1.8 V to 5.5 V (full range) | 1.8 V to 5.5 V |
| EEPROM | 512 B | 512 B | 1 KB | 1 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 2 KB |
| Pin Compatibility with ATmega8 | Native | Identical - true drop-in | Pin-compatible per AVR094, firmware changes needed | Pin-compatible, firmware changes needed |
أبرز الفروقات
- True drop-in continuity (مقابلATMEGA88-15MT)
- Highest clock in the ATmega8 family at 5 V (مقابلATMEGA88-15MT)
- Higher integration than low-end AVR at same footprint (مقابلATMEGA48PA-MUR)
ملاحظات التصميم
Decouple both VCC pins (4 and 6) and AVCC (pin 18) individually. Use 100 nF ceramic capacitors placed within 2 mm of each supply pin, plus one 4.7-10 uF bulk capacitor near the device. AVCC must be connected to VCC even if the ADC is unused; for clean analog performance, feed AVCC through an LC filter (10 uH inductor with 100 nF) as recommended in the ATmega8 datasheet. The exposed pad must be soldered to ground - it is the primary ground return for the MLF-32 package.
Clock fuse misconfiguration is the most common ATmega8 failure mode. Setting fuses for external crystal when none is fitted (or vice versa) can brick the device except via parallel high-voltage programming. The -16 speed grade only guarantees 16 MHz at 4.5-5.5 V; do not attempt 16 MHz at 3.3 V - use ATmega48PA/88PA/328P for wide-voltage designs. Also remember PC6/RESET is active-low with an internal pull-up only when configured; add an external 10 k pull-up for reliable in-circuit programming.
For the 5x5 mm VQFN (0.5 mm pitch), use a standard QFN-32 land pattern with the center pad tied to a via-stitched ground plane (minimum 4-5 vias under the pad). For ICSP access, route PB5/SCK, PB4/MISO, PB3/MOSI, and PC6/RESET to a 2x3 header. Keep the crystal on PB6/PB7 within 10 mm of the pins with short ground-guard traces, and keep SPI/TWI lines away from the ADC input traces to preserve 10-bit ADC accuracy.
معلومات الامتثال
RoHS status not explicitly stated in the retrieved distributor data; verify on the official Microchip product page. AEC-Q100 not claimed in the retrieved data.
