ATMEGA8-16MC - 8KB Flash 16MHz AVR MCU 32-VQFN | Microchip
MPN: ATMEGA8-16MC β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.2 | $3.20 |
| 10 | $2.88 | $28.80 |
| 100 | $2.56 | $256.00 |
| 500 | $2.3 | $1,150.00 |
| 1,000 | $2.04 | $2,040.00 |
ATMEGA8-16MC Overview
An 8-bit microcontroller is a self-contained computing device that integrates a processor core, program memory, data memory, and peripherals on a single silicon die. Within the power-management and embedded-control hierarchy, MCUs sit at the system level: they read sensors, execute firmware, and drive actuators, replacing discrete logic and analog control circuits. The AVR family popularized single-cycle RISC execution, where most of its 130 instructions complete in one clock cycle, giving deterministic real-time behavior prized in embedded control.
Key features of the ATMEGA8-16MC include Harvard architecture with separate program and data buses, 32 general-purpose working registers directly connected to the ALU, and fully static operation allowing clock frequencies down to DC. The 10-bit ADC with 6 or 8 multiplexed channels handles analog sensing without external converters, while three flexible Timer/Counters with compare modes support PWM generation, event counting, and precise timing.
Architecturally, the AVR core pairs its register file with an arithmetic logic unit in a single-cycle pipeline: one instruction is fetched while the previous executes. This yields 1 MIPS per MHz efficiency, letting engineers run at lower clock speeds to cut power consumption. In-System Programmable (ISP) Flash with Read-While-Write capability enables firmware updates on assembled boards via the serial peripheral USART or SPI interface.
Typical applications include industrial control panels, motor and LED control, sensor acquisition nodes using the built-in 10-bit ADC, and low-cost consumer appliance firmware. The compact 5x5 mm VQFN suits space-constrained designs.
Design-wise, verify the exact supply voltage range for the 16 MHz speed grade in the manufacturer datasheet before layout, and decouple AVCC separately from VCC for ADC accuracy.
This page synthesizes distributor pricing context, drop-in alternatives, pinout data, and practical design notes not found in the raw datasheet.
Drop-in alternatives for ATMEGA8-16MC β 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 ATMEGA8-16MC (same form factor and footprint) β differing in Instructions.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATMEGA8-16MU
β Drop-Inβ In Stock
$1.62 / Unit
View Datasheet βATMEGA8A-MU
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA8L-8MU
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA8-16MC Maximum Ratings & Electrical Characteristics
| Core Architecture | AVR RISC, 8-bit |
| Flash Program Memory | 8 KB (4K x 16), In-System Programmable |
| EEPROM | 512 B |
| SRAM | 1 KB |
| Maximum CPU Frequency | 16 MHz |
| Throughput | 16 MIPS at 16 MHz |
| Instructions | 130 instructions, most single-cycle |
| General Purpose I/O | 23 lines |
| Working Registers | 32 x 8-bit |
| ADC | 6 or 8 channel, 10-bit |
| Timers/Counters | 3 with compare modes |
| Serial Interfaces | USART (serial programmable) |
| Package | 32-VQFN (5x5 mm) |
| Interrupts | Internal and external interrupt sources |
ATMEGA8-16MC Pin Configuration
| Pin 1 | PC6 (RESET) β Port C bit 6 / Reset input |
| Pin 2 | PD0 (RXD) β Port D bit 0 / USART receive |
| Pin 3 | PD1 (TXD) β Port D bit 1 / USART transmit |
| Pin 4 | PD2 (INT0) β Port D bit 2 / External interrupt 0 |
| Pin 5 | PD3 (INT1) β Port D bit 3 / External interrupt 1 |
| Pin 6 | PD4 (T0) β Port D bit 4 / Timer 0 counter input |
| Pin 7 | VCC β Digital supply voltage |
| Pin 8 | GND β Ground |
| Pin 9 | PD5 (T1) β Port D bit 5 / Timer 1 counter input |
| Pin 10 | PD6 (ICP) β Port D bit 6 / Timer 1 input capture |
| Pin 11 | PD7 (OC2) β Port D bit 7 / Timer 2 output compare (PWM) |
| Pin 12 | PB0 (XCK) β Port B bit 0 / USART external clock |
| Pin 13 | PB1 (T1) β Port B bit 1 / Timer 1 counter input |
| Pin 14 | PB2 (AIN0/INT2) β Port B bit 2 / Analog comparator input 0 / External interrupt 2 |
| Pin 15 | PB3 (AIN1/OC0) β Port B bit 3 / Analog comparator input 1 / Timer 0 output compare (PWM) |
| Pin 16 | PB4 (SS) β Port B bit 4 / SPI slave select |
| Pin 17 | PB5 (MOSI) β Port B bit 5 / SPI master output |
| Pin 18 | AVCC β ADC supply voltage |
| Pin 19 | AREF β ADC reference voltage |
| Pin 20 | GND β Ground |
| Pin 21 | PB6 (MISO) β Port B bit 6 / SPI master input |
| Pin 22 | PB7 (SCK) β Port B bit 7 / SPI serial clock |
| Pin 23 | PC0 (ADC0) β Port C bit 0 / ADC channel 0 |
| Pin 24 | PC1 (ADC1) β Port C bit 1 / ADC channel 1 |
| Pin 25 | PC2 (ADC2) β Port C bit 2 / ADC channel 2 |
| Pin 26 | PC3 (ADC3) β Port C bit 3 / ADC channel 3 |
| Pin 27 | PC4 (ADC4/SDA) β Port C bit 4 / ADC channel 4 / Two-wire data |
| Pin 28 | PC5 (ADC5/SCL) β Port C bit 5 / ADC channel 5 / Two-wire clock |
| Pin 29 | ADC6 β ADC channel 6 (32-pin packages only) |
| Pin 30 | AVCC β ADC supply (32-pin packages only) |
| Pin 31 | GND β Ground (32-pin packages only) |
| Pin 32 | ADC7 β ADC channel 7 (32-pin packages only) |
Typical Applications
ATMEGA8-16MC is suitable for 6 applications: Industrial Control Systems, Analog Sensor Acquisition, Embedded Communication Nodes, Motor and LED Control, Consumer Appliance Firmware, Hobbyist and Educational Platforms.
Industrial Control Systems
The ATMEGA8-16MC fits industrial control panels and automation nodes where deterministic, single-cycle AVR RISC execution provides predictable loop timing. Its 130-instruction set executing mostly in one clock cycle gives 16 MIPS at 16 MHz, enough headroom for PID loops, relay sequencing, and Modbus-style USART communication. Three Timer/Counters with compare modes generate PWM for actuator control while external interrupts (INT0/INT1 on PD2/PD3) respond to limit switches with microsecond latency. The 8KB self-programming Flash supports field firmware updates over the serial USART, reducing service visits. Its industrial-grade static core and 23 GPIO lines integrate sensor inputs, keypads, and status outputs in one 5x5 mm VQFN device.
Recommended
Analog Sensor Acquisition
With a 10-bit ADC offering 6 or 8 multiplexed channels in the 32-pin package, the ATMEGA8-16MC digitizes temperature, pressure, and potentiometer inputs without an external converter. The separate AVCC supply pin (pin 18) and AREF reference pin allow clean analog domains: decoupling AVCC from digital VCC reduces ADC code noise, and the 10-bit resolution yields roughly 4.9 mV steps on a 5V reference. The 1KB SRAM buffers sample arrays while Timer/Counter triggers pace conversions at precise intervals. Internal and external interrupt sources let threshold crossings wake the CPU for event-driven logging. For battery-powered loggers, the fully static core permits clock stretching to DC, trading throughput for power.
Recommended
Embedded Communication Nodes
The ATMEGA8-16MC's serial programmable USART makes it a compact UART bridge and protocol translator in RS-232/RS-485 networks. At 16 MHz, standard baud rates are generated with low error from the clock divider chain, and the I2C-compatible two-wire interface on PC4 (SDA) and PC5 (SCL) connects EEPROMs, RTCs, and sensors. SPI via PB4-PB7 (SS, MOSI, MISO, SCK) programs the In-System Flash and talks to peripherals at high speed. With 8KB Flash, compact protocol stacks for Modbus RTU or custom framing fit comfortably, and Read-While-Write Flash supports boot-loaders so firmware can be updated in the field through the existing serial link, eliminating socketed-programmer maintenance.
Recommended
Motor and LED Control
Three flexible Timer/Counters with compare modes make the ATMEGA8-16MC a cost-effective PWM controller for DC motors, fans, and LED dimming. The OC2 output on PD7 delivers hardware PWM independent of CPU load, while T0/T1 inputs on PD4/PD5 accept tachometer feedback for closed-loop speed regulation. At 16 MIPS, firmware can run control algorithms plus USART telemetry concurrently. The 23 GPIO lines drive transistor/MOSFET gate stages, and the 10-bit ADC reads current-sense shunts for overcurrent protection. Because PWM is generated in hardware, output frequency is crystal-accurate and jitter-free, which matters for audible-noise-sensitive fan and lighting applications in appliances and HVAC equipment.
Recommended
Consumer Appliance Firmware
In microwaves, coffee machines, and small appliances, the ATMEGA8-16MC replaces discrete logic with a single programmable device handling keypad scanning, display multiplexing, and relay control. The 512B EEPROM stores user settings and calibration constants that survive power cycles, while the internal and external interrupt architecture supports front-panel buttons via INT0/INT1 and rotary encoders on any GPIO. Its fully static operation and low-power CMOS process keep standby consumption low between wake events. The 5x5 mm 32-VQFN package fits on compact single-sided control boards, and the widespread AVR toolchain (including open-source MiniCore Arduino support for ATmega8) shortens firmware development for cost-sensitive appliance projects.
Recommended
Hobbyist and Educational Platforms
The ATMEGA8 family underpins classic open-source embedded platforms: the MiniCore Arduino hardware package explicitly supports ATmega8, letting hobbyists use standard Arduino tooling with this chip. The ATMEGA8-16MC's 16 MIPS core, 8KB ISP Flash, and built-in 10-bit ADC provide a complete learning platform for embedded C and assembly education. Its 32 general-purpose working registers and documented 130-instruction AVR RISC set are widely used in university microprocessor courses to teach load/store architectures. USB ISP programmers program the Flash in-circuit through the SPI pins, and the huge community codebase covers LCDs, sensors, and servos, dramatically lowering the entry barrier for students and makers.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA8-16MC β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA8-16MU | ATMEGA8A-MU | ATMEGA8L-8MU |
|---|---|---|---|---|
| Package | 32-VQFN (5x5 mm) | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same |
| Brand | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) |
| Flash Memory | 8 KB | 8 KB | 8 KB | 8 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB |
| EEPROM | 512 B | 512 B | 512 B | 512 B |
| ADC Channels | 6 or 8 channel, 10-bit | 6 or 8 channel, 10-bit | 6 or 8 channel, 10-bit | 6 or 8 channel, 10-bit |
| GPIO Lines | 23 | 23 | 23 | 23 |
| Supply Security | Legacy order code | Legacy order code | Current production (preferred) | Legacy order code |
Key Differentiators
- Single-cycle RISC efficiency (vs ATMEGA8L-8MU)
- Supply security over legacy stock (vs ATMEGA8-16MU)
- Extended ADC channels in 32-pin package (vs ATMEGA8-16MU equivalents in 28-pin packages)
Design Notes
On the 32-VQFN (5x5 mm) MLF footprint, the exposed die-attach pad on the underside must be soldered to a grounded copper pour - do not treat it as a no-connect. Use a 3x3 or 4x4 via array in the pad to stitch to the ground plane, improving thermal dissipation and noise performance. Verify your land-pattern dimensions against the MLF footprint drawing in the ATmega8 datasheet, since VQFN land patterns differ slightly between manufacturers.
Decouple AVCC (pin 18) separately from VCC (pin 7): place a 100 nF ceramic capacitor directly at AVCC with a low-pass LC or ferrite filter from the digital rail. AVCC also powers ADC6/ADC7 (pins 29/32) on this package, so dirty AVCC directly degrades 10-bit ADC accuracy. Connect AREF (pin 19) with a 100 nF capacitor to GND unless using external reference; never drive AREF while the internal reference is enabled.
Do not leave RESET (pin 1, PC6) floating in noisy environments: a 10 kΞ© pull-up is standard practice, since spurious resets corrupt Flash/EEPROM writes. If using ISP programming, ensure pull-up values do not load the SCK/MOSI lines below programmer drive levels. When migrating from ATMEGA8-16MC to ATMEGA8A-MU, review the ATmega8A errata sheet: the A revision resolves original ATmega8 errata but introduces its own documented notes that may affect timing-sensitive firmware.
Compliance Information
Retrieved distributor data does not state RoHS/REACH status for this legacy Atmel order code. Verify against Microchip's official environmental documentation before EU-market use.
