ATMEGA48V-10AI - 8-Bit AVR MCU 4KB Flash 10MHz | Microchip
MPN: ATMEGA48V-10AI β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.15 | $2.15 |
| 10 | $1.94 | $19.40 |
| 100 | $1.72 | $172.00 |
| 500 | $1.55 | $775.00 |
| 1,000 | $1.38 | $1,380.00 |
ATMEGA48V-10AI Overview
An 8-bit microcontroller is a single-chip computer that integrates a CPU, program memory, data memory, and peripherals such as timers, serial interfaces, and analog-to-digital converters. Within the semiconductor taxonomy, the ATmega48V sits at microcontroller -> 8-bit MCU -> embedded processor -> integrated circuit, and it is built on the AVR enhanced RISC architecture that executes most instructions in a single clock cycle, allowing the designer to trade processing speed against power consumption.
Key differentiators include 4 KB ISP Flash with 10,000 write/erase cycles, a true 10-bit ADC with 8 multiplexed channels, a programmable watchdog timer with separate on-chip oscillator, and debugWIRE on-chip debug capability. The device also integrates two 8-bit timers, one 16-bit timer, a USART, SPI, and a byte-oriented two-wire serial interface, plus an internal calibrated RC oscillator that removes the need for an external clock in many designs.
The ATmega48V uses picoPower technology to minimize active and standby current, making it well suited to battery-powered and always-on embedded systems. Its 1.8 V minimum supply allows direct operation from two AA cells or a single Li-ion cell with a low-dropout regulator, while the 5.5 V maximum keeps it compatible with legacy 5 V logic.
Typical applications include battery-powered sensor nodes, consumer appliance control panels, motor control front ends, and low-cost industrial instrumentation. The 32-pin TQFP footprint is shared across the ATmega48/88/168 family, so firmware and PCB layouts can be scaled by Flash size without redesign.
When designing with this device, decouple VCC and AVCC with 100 nF ceramic capacitors placed close to the pins, and keep the 32 kHz crystal or resonator traces short. The debugWIRE interface shares the RESET pin, so reserve a programming header footprint if field re-flashing is required.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that are not consolidated in the manufacturer datasheet, giving engineers a single reference for selection, cross-referencing, and procurement of the ATMEGA48V-10AI.
Drop-in alternatives for ATMEGA48V-10AI 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 ATMEGA48V-10AI (same form factor and footprint) β differing in Operating Temperature, Package, ADC Resolution, Core Processor, EEPROM.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATMEGA48V-10AU
β Drop-Inπ Reference alternative (not in catalog)
ATMEGA48V-10PI
β Drop-Inπ Reference alternative (not in catalog)
ATMEGA88V-10AU
β Drop-Inπ Reference alternative (not in catalog)
ATMEGA168V-10AU
β Drop-Inβ In Stock
$1.1 / Unit
View Datasheet βATMEGA48PA-AU
β Drop-Inβ In Stock
$1.38 / Unit
View Datasheet βATMEGA48A-AU
β Drop-Inπ Reference alternative (not in catalog)
ATMEGA48V-10AI Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit AVR RISC |
| Program Memory Size | 4 KB (2K x 16) In-System Programmable Flash |
| Flash Endurance | 10,000 write/erase cycles |
| SRAM | 512 bytes |
| EEPROM | 256 bytes |
| Maximum Operating Frequency | 10 MHz |
| Throughput | Up to 10 MIPS at 10 MHz |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Instruction Set | 131 powerful instructions, most single clock cycle |
| General Purpose I/O | 23 programmable I/O lines |
| ADC | 8-channel, 10-bit successive approximation |
| Timers | Two 8-bit, one 16-bit |
| Serial Interfaces | USART, SPI, Two-wire (I2C) |
| On-chip Debug | debugWIRE |
| Internal Oscillator | Calibrated 8 MHz RC oscillator |
| Package | 32-pin TQFP (7x7 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C |
| RoHS Status | Compliant |
ATMEGA48V-10AI Pin Configuration
| Pin 1 | PB0 β Port B, bit 0 (also ICP1/PCINT0) |
| Pin 2 | PB1 β Port B, bit 1 (also OC1A/PCINT1) |
| Pin 3 | PB2 β Port B, bit 2 (also SS/OC1B/PCINT2) |
| Pin 4 | PB3 β Port B, bit 3 (also MOSI/OC2A/PCINT3) |
| Pin 5 | PB4 β Port B, bit 4 (also MISO/PCINT4) |
| Pin 6 | PB5 β Port B, bit 5 (also SCK/PCINT5) |
| Pin 7 | PB6 β Port B, bit 6 (also XTAL1/TOSC1/PCINT6) |
| Pin 8 | PB7 β Port B, bit 7 (also XTAL2/TOSC2/PCINT7) |
| Pin 9 | RESET β Reset input (active low), also debugWIRE |
| Pin 10 | VCC β Digital supply voltage |
| Pin 11 | GND β Ground |
| Pin 12 | XTAL1 β Crystal oscillator input / external clock |
| Pin 13 | XTAL2 β Crystal oscillator output |
| Pin 14 | PD0 β Port D, bit 0 (also RXD/PCINT16) |
| Pin 15 | PD1 β Port D, bit 1 (also TXD/PCINT17) |
| Pin 16 | PD2 β Port D, bit 2 (also INT0/PCINT18) |
| Pin 17 | PD3 β Port D, bit 3 (also INT1/OC2B/PCINT19) |
| Pin 18 | PD4 β Port D, bit 4 (also T0/PCINT20) |
| Pin 19 | PD5 β Port D, bit 5 (also T1/OC0B/PCINT21) |
| Pin 20 | PD6 β Port D, bit 6 (also AIN0/OC0A/PCINT22) |
| Pin 21 | PD7 β Port D, bit 7 (also AIN1/PCINT23) |
| Pin 22 | PC0 β Port C, bit 0 (also ADC0/PCINT8) |
| Pin 23 | PC1 β Port C, bit 1 (also ADC1/PCINT9) |
| Pin 24 | PC2 β Port C, bit 2 (also ADC2/PCINT10) |
| Pin 25 | PC3 β Port C, bit 3 (also ADC3/PCINT11) |
| Pin 26 | PC4 β Port C, bit 4 (also ADC4/PCINT12) |
| Pin 27 | PC5 β Port C, bit 5 (also ADC5/PCINT13) |
| Pin 28 | PC6 β Port C, bit 6 (also ADC6/PCINT14) |
| Pin 29 | PC7 β Port C, bit 7 (also ADC7/PCINT15) |
| Pin 30 | AVCC β Analog supply voltage for ADC |
| Pin 31 | GND β Ground |
| Pin 32 | AREF β Analog reference voltage for ADC |
Typical Applications
ATMEGA48V-10AI is suitable for 6 applications: Battery-Powered Sensor Nodes, Consumer Appliance Control Panels, Motor Control Front Ends, Low-Cost Industrial Instrumentation, Embedded Data Logging, Legacy 5 V System Migration.
Battery-Powered Sensor Nodes
The ATMEGA48V-10AI fits battery-powered sensor nodes because its 1.8 V minimum supply and picoPower technology allow direct operation from two AA cells or a single Li-ion cell without a boost converter. In a typical node, the MCU wakes from power-down mode on a watchdog or pin-change interrupt, samples a sensor through the 8-channel 10-bit ADC, and transmits via the USART or SPI radio interface before returning to sleep. The 4 KB Flash is sufficient for a compact sensor stack plus a lightweight protocol, and the 512 bytes SRAM holds the sample buffer. The internal calibrated 8 MHz RC oscillator removes the external crystal, cutting bill-of-materials cost and board area. Designers should budget the ADC reference from AVCC with a 100 nF decoupling capacitor and keep the sleep current below 1 uA to achieve multi-year coin-cell life.
Recommended
Consumer Appliance Control Panels
The ATMEGA48V-10AI is used in consumer appliance control panels where a low-cost 8-bit MCU must read buttons, drive LEDs or a small display, and control relays or triacs. Its 23 programmable I/O lines and two 8-bit plus one 16-bit timer provide enough PWM and timing resources for motor speed control, buzzer tones, and capacitive-touch scanning. The 5.5 V maximum supply allows direct interfacing with 5 V logic and relay driver transistors, while the 10-bit ADC monitors thermistors or current-sense shunts. Because the ATmega48/88/168 family shares the same 32-pin TQFP footprint, a single PCB can be populated with 4 KB, 8 KB, or 16 KB Flash variants to cover multiple appliance SKUs. Decouple VCC and AVCC locally and add a reset supervisor if the appliance rail ramps slowly.
Recommended
Motor Control Front Ends
The ATMEGA48V-10AI serves as a motor control front end in small brushed-DC and stepper applications, generating PWM with its 8-bit and 16-bit timers while reading position or current feedback through the 10-bit ADC. At 10 MHz it delivers up to 10 MIPS, enough for a simple PI current loop or trapezoidal commutation at low switching frequencies. The 16-bit timer supports precise pulse generation for stepper drivers, and the USART allows a host controller to send speed and direction commands. The 1.8 V to 5.5 V range accommodates both 3.3 V and 5 V gate-driver logic. Keep the ADC ground return separate from the power stage ground and place a 100 nF capacitor on AREF to reduce switching noise coupling into current measurements. For higher loop rates, the pin-compatible ATMEGA48PA-AU doubles the clock ceiling to 20 MHz.
Recommended
Low-Cost Industrial Instrumentation
The ATMEGA48V-10AI is suited to low-cost industrial instrumentation such as temperature transmitters, flow meters, and data loggers, where the 8-channel 10-bit ADC digitizes sensor signals and the USART or two-wire interface reports results to a supervisory system. The -40C to +85C industrial temperature rating covers most factory-floor environments, and the 1.8 V to 5.5 V supply range tolerates the wide rails found in 24 V industrial systems after regulation. The 256 bytes EEPROM stores calibration coefficients without an external memory device, and debugWIRE supports in-circuit debugging during development. Use a precision external reference on AREF for ratiometric measurements, and add RC filtering ahead of the ADC inputs to reject motor and relay noise. The 4 KB Flash is adequate for a Modbus RTU slave stack plus calibration routines.
Recommended
Embedded Data Logging
The ATMEGA48V-10AI works as an embedded data logger that samples analog or digital sensors on a timer interrupt, timestamps readings with the 16-bit timer, and stores them to an external SPI or two-wire EEPROM or Flash device. The 512 bytes SRAM buffers a page of samples before a burst write, reducing memory write cycles, while the 256 bytes internal EEPROM holds configuration and calibration data. The 1.8 V to 5.5 V supply lets the logger run from a single Li-ion cell, and picoPower sleep modes extend battery life between sampling intervals. The internal 8 MHz RC oscillator is accurate enough for interval logging; add a 32.768 kHz crystal if real-time clock accuracy matters. Keep the SPI clock traces short and add series termination if the memory device is more than a few centimeters away.
Recommended
Legacy 5 V System Migration
The ATMEGA48V-10AI is often chosen to migrate legacy 5 V 8-bit designs to a modern AVR core while retaining 5 V logic compatibility, because its 5.5 V maximum supply allows direct connection to 5 V peripherals without level shifters. The 32-pin TQFP footprint and ATmega48/88/168 pinout make it straightforward to replace older 8051 or PIC devices after a firmware port, and the 131-instruction RISC core executes most operations in a single clock cycle for predictable timing. The 10-bit ADC and hardware USART, SPI, and two-wire interfaces replace discrete support chips, shrinking the board. During migration, verify that any 5 V-only peripherals do not exceed the MCU absolute maximum ratings, and add a 100 nF decoupling capacitor per supply pin. The pin-compatible ATMEGA168V-10AU provides headroom if the ported firmware outgrows 4 KB.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA48V-10AI β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA48V-10AU | ATMEGA88V-10AU | ATMEGA168V-10AU | ATMEGA48PA-AU |
|---|---|---|---|---|---|
| Package | 32-pin TQFP (7x7 mm) | 32-pin TQFP (7x7 mm) - same | 32-pin TQFP (7x7 mm) - same | 32-pin TQFP (7x7 mm) - same | 32-pin TQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 4 KB (2K x 16) | 4 KB | 8 KB | 16 KB | 4 KB |
| SRAM | 512 bytes | 512 bytes | 1 KB | 1 KB | 512 bytes |
| EEPROM | 256 bytes | 256 bytes | 512 bytes | 512 bytes | 256 bytes |
| Maximum Frequency | 10 MHz | 10 MHz | 10 MHz | 10 MHz | 20 MHz |
| Supply Voltage Range | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Temperature Grade | -40C to +85C (industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| ADC Channels / Resolution | 8 channels / 10-bit | 8 channels / 10-bit | 8 channels / 10-bit | 8 channels / 10-bit | 8 channels / 10-bit |
| On-chip Debug | debugWIRE | debugWIRE | debugWIRE | debugWIRE | debugWIRE |
Key Differentiators
- Lowest-cost 4 KB entry point in the ATmega48/88/168 family (vs ATMEGA88V-10AU)
- 1.8 V operation at full 10 MHz speed grade (vs ATMEGA48PA-AU)
- Industrial temperature rating in the same footprint (vs ATMEGA48V-10AU)
Design Notes
Decouple both VCC (pin 10) and AVCC (pin 30) with 100 nF ceramic capacitors placed within a few millimeters of the pins, and add a 10 uF bulk capacitor on the board rail. AVCC must be within 0.3 V of VCC per the ATmega48/88/168 datasheet; if the ADC is unused, AVCC can be tied to VCC through the decoupling network. Estimated: at 10 MHz and 5 V, active current is roughly 10-12 mA, so a 100 nF capacitor per supply pin keeps transient droop below 50 mV during I/O switching.
Keep the crystal or resonator traces between XTAL1 (pin 12) and XTAL2 (pin 13) as short as possible and guard them with ground. Place the load capacitors directly at the crystal pins and connect their ground returns to the MCU ground plane with vias. If the internal calibrated 8 MHz RC oscillator is used instead, leave XTAL1/XTAL2 unconnected but do not route signals beneath them. Route the debugWIRE RESET line (pin 9) away from switching nodes to avoid accidental resets during in-circuit debugging.
The debugWIRE interface shares the RESET pin, so enabling debugWIRE disables the external reset function; always provide a programming header and a way to disable the DWEN fuse if field recovery is needed. Do not exceed the 5.5 V absolute maximum supply, and ensure the AREF voltage never exceeds AVCC. Estimated: with a 10-bit ADC and a 5 V AREF, one LSB is about 4.9 mV, so keep analog ground returns separate from digital ground to preserve accuracy. Brown-out detection should be enabled for reliable EEPROM writes.
Compliance Information
RoHS and REACH compliance reported by distributor listings for the ATMEGA48V-10AI. Not AEC-Q100 qualified; the ATmega48/88/168 family is offered in automotive-grade variants separately. Halogen-free status not stated in the retrieved data.
