ATMEGA48V-10MI - 4KB Flash 1.8V AVR MCU QFN-32 | Microchip
MPN: ATMEGA48V-10MI ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
ATMEGA48V-10MI Overview
An 8-bit AVR microcontroller is a Harvard-architecture processor that executes most of its 131 powerful instructions in a single clock cycle. Within the power-management hierarchy, microcontrollers sit at the system-control layer, integrating CPU, program memory, data memory, timers, analog conversion, and serial interfaces into a single IC, reducing board complexity versus discrete MCU-plus-logic solutions.
Key features include the advanced RISC core with 32 general-purpose 8-bit working registers, three flexible timer/counters with compare modes and PWM, byte-oriented Two-Wire Interface (I2C), USART serial port, and SPI. The low-voltage V-variant operates down to 1.8V, making it well suited to battery-powered designs where a 5V rail is not available.
Technical depth: the device features debugWIRE on-chip debugging over the RESET pin, a 10-bit successive-approximation ADC with internal 1.1V bandgap reference option, and self-programming Flash enabling field updates. The picoPower-class sleep modes (idle, ADC noise reduction, power-save, power-down) achieve low standby consumption.
Typical applications include battery-powered sensor nodes, industrial control and metering, small appliance and consumer product control boards, and lighting control - anywhere 4KB of code, low voltage, and a compact 5x5 mm QFN footprint suffice.
Design consideration: reserve PC6/RESET and the Two-Wire/SPI pins early; programming uses SPI (ISP) on PB3-PB5, which must remain accessible on the PCB for factory programming and debugWIRE.
This page synthesizes distributor pricing context, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATMEGA48V-10MI — 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-10MI (same form factor and footprint) — differing in Package, Flash Memory, Operating Temperature, ADC, Serial Interfaces.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATMEGA48V-10MU
✅ Drop-In✓ In Stock
$2.38 / Unit
View Datasheet →ATMEGA48PV-10MUR
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.85 / Unit
View Datasheet →ATMEGA48PV-10MMU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.71 / Unit
View Datasheet →ATMEGA48PA-MUR
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.98 / Unit
View Datasheet →ATMEGA48-20MI
✅ Drop-In ⚠️ 参数待验证✓ In Stock
Contact for price
View Datasheet →ATMEGA48P-20MMU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.1698 / Unit
View Datasheet →ATMEGA48V-10MI Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit AVR RISC |
| Flash Program Memory | 4 KB In-System Programmable |
| SRAM | 512 B |
| EEPROM | 256 B |
| Maximum CPU Speed | 10 MHz (up to 10 MIPS) |
| Supply Voltage Range | 1.8 V to 5.5 V |
| ADC | 8-channel 10-bit |
| GPIO Count | 23 I/O lines |
| Timers | 3 flexible timer/counters |
| Serial Interfaces | USART, SPI, Two-Wire Interface (I2C) |
| On-Chip Debug | debugWIRE |
| Operating Temperature | -40C to +85C (industrial) |
| Package | 32-VFQFN Exposed Pad (MLF) 5x5 mm |
| Mounting Type | Surface Mount |
| Series | AVR ATmega48 |
ATMEGA48V-10MI Pin Configuration
| Pin 1 | PD3 — Port D bit 3 / digital I/O |
| Pin 2 | PD4 — Port D bit 4 / digital I/O |
| Pin 3 | GND — Ground |
| Pin 4 | VCC — Digital supply voltage |
| Pin 5 | GND — Ground |
| Pin 6 | VCC — Digital supply voltage |
| Pin 7 | PB6 — Port B bit 6 / XTAL1 / TOSC1 |
| Pin 8 | PB7 — Port B bit 7 / XTAL2 / TOSC2 |
| Pin 9 | PD5 — Port D bit 5 / digital I/O |
| Pin 10 | PD6 — Port D bit 6 / digital I/O |
| Pin 11 | PD7 — Port D bit 7 / digital I/O |
| Pin 12 | PB0 — Port B bit 0 / digital I/O |
| Pin 13 | PB1 — Port B bit 1 / digital I/O |
| Pin 14 | PB2 — Port B bit 2 / digital I/O |
| Pin 15 | PB3 — Port B bit 3 / MOSI (SPI) / OC2A |
| Pin 16 | PB4 — Port B bit 4 / MISO (SPI) |
| Pin 17 | PB5 — Port B bit 5 / SCK (SPI) |
| Pin 18 | AVCC — ADC supply voltage |
| Pin 19 | ADC6 — ADC input channel 6 |
| Pin 20 | AREF — ADC analog reference |
| Pin 21 | GND — Ground |
| Pin 22 | ADC7 — ADC input channel 7 |
| Pin 23 | PC0 — Port C bit 0 / ADC channel 8 |
| Pin 24 | PC1 — Port C bit 1 / ADC channel 9 |
| Pin 25 | PC2 — Port C bit 2 / ADC channel 10 |
| Pin 26 | PC3 — Port C bit 3 / ADC channel 11 |
| Pin 27 | PC4 — Port C bit 4 / ADC channel 12 / SDA (TWI) |
| Pin 28 | PC5 — Port C bit 5 / ADC channel 13 / SCL (TWI) |
| Pin 29 | PC6 — RESET / debugWIRE pin |
| Pin 30 | PD0 — Port D bit 0 / RXD (USART) |
| Pin 31 | PD1 — Port D bit 1 / TXD (USART) |
| Pin 32 | PD2 — Port D bit 2 / digital I/O (INT0) |
Typical Applications
ATMEGA48V-10MI is suitable for 6 applications: Battery-Powered Sensor Nodes, Industrial Control and Metering, Small Appliance and Consumer Control Boards, Lighting Control, Portable Measurement Instruments, Remote Control and Radio Accessories.
Battery-Powered Sensor Nodes
The ATMEGA48V-10MI fits battery-powered sensor nodes because its 1.8V to 5.5V supply range covers single-cell lithium and multi-cell alkaline chemistries without a boost converter, and its power-down sleep mode minimizes standby drain between measurement cycles. The integrated 8-channel 10-bit ADC with an internal 1.1V bandgap reference digitizes thermistors, potentiometers, and light sensors directly, while the Two-Wire Interface connects digital sensors and the USART links a radio module. In a typical node, the MCU sleeps in power-down with a watchdog wake interval, reads a sensor through the ADC or TWI, transmits via UART, and returns to sleep; the 10MHz ceiling is more than sufficient since most of the duty cycle is spent asleep, and running at lower clocks and voltages further reduces energy per operation.
Recommended
Industrial Control and Metering
In industrial control panels and sub-metering boards, the ATMEGA48V-10MI provides the industrial -40C to +85C temperature rating required for factory-floor enclosures, plus 23 GPIO lines to drive relays, optocouplers, and indicator LEDs. The three flexible timer/counters generate PWM outputs for heater and motor control, the 10-bit ADC samples current and voltage sense channels, and the USART connects to RS-485 transceivers for Modbus-style field communication. The 4KB self-programming Flash supports field firmware updates over the existing serial link without tooling access. Using the V-variant allows one firmware image and one PCB to be reused across 3.3V logic, 5V, and battery-backed installations, since the same die operates across the entire 1.8V to 5.5V range at 10MHz.
Recommended
Small Appliance and Consumer Control Boards
The ATMEGA48V-10MI is a cost-effective controller for small appliances, fans, coffee machines, and chargers where 4KB of code covers state machines, button debouncing, and thermal limits. Its 5x5 mm 32-pad VFQFN exposed-pad package saves board area on cost-driven single-layer-dominated PCBs, and the exposed die pad doubles as a thermal and grounding anchor. Timer compare channels produce buzzer tones and LED dimming, the ADC reads NTC thermistors for over-temperature protection, and the Two-Wire Interface can talk to an EEPROM or capacitive-touch controller. Wide 1.8V to 5.5V operation lets one design accept both mains-derived 5V and rechargeable 3.7V supplies, reducing SKU count across product families and simplifying certification across regional power variants.
Recommended
Lighting Control
For LED luminaires and DALI-style lighting nodes, the ATMEGA48V-10MI offers three timer/counters whose compare-match outputs generate hardware PWM for dimming without CPU intervention, keeping flicker-free, jitter-stable PWM even while firmware handles protocol parsing. The 10-bit ADC monitors LED current sense resistors and thermal feedback from an NTC on the heatsink, enabling closed-loop constant-current operation. The USART or Two-Wire Interface receives dimming commands from a master controller or DALI transceiver. Operation down to 1.8V supports designs powered from long LED-string bias rails, while the industrial temperature rating suits enclosed, heat-soaked luminaires. The debugWIRE on-chip debug over the single RESET pin simplifies firmware tuning of gamma-correction curves during development.
Recommended
Portable Measurement Instruments
Handheld meters and diagnostic tools benefit from the ATMEGA48V-10MI's 8-channel 10-bit ADC, low-voltage operation, and compact 5x5 mm footprint. Two extra ADC channels (ADC6, ADC7) available on the QFN package add measurement inputs beyond the six port-C channels, useful for battery-voltage monitoring in addition to signal inputs. The internal 1.1V bandgap reference enables ratiometric low-range measurements without external references, and the ADC noise reduction sleep mode lowers conversion noise for sensitive readings. A 16x2 LCD or segment display is driven from port pins, buttons are multiplexed, and results are logged to the 256B EEPROM between power cycles. Running from two AA cells at 3V, the device operates comfortably within its guaranteed 1.8V-5.5V envelope to end-of-battery.
Recommended
Remote Control and Radio Accessories
Wireless keyboards, remote controls, and low-cost radio accessories use the ATMEGA48V-10MI's power-down mode for multi-year coin-cell life and its USART or SPI to drive sub-GHz or 2.4GHz transceiver modules. The 1.8V floor permits direct operation from a 3V CR2032 across its full discharge curve, eliminating regulator dropout concerns near end-of-life. Hardware SPI (PB3-PB5) clocks transceiver data at rates well above the MCU's 10MHz interrupt budget, and pin-change interrupts on any GPIO wake the MCU on key presses within microseconds. The 23 I/O lines scan a button matrix directly, and the 256B EEPROM stores pairing keys and calibration data. debugWIRE eases RF stack debugging using only the RESET line, preserving I/O on this pin-limited package.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA48V-10MI — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA48V-10MU | ATMEGA48PV-10MUR | ATMEGA48PA-MUR | ATMEGA48-20MI | ATMEGA48P-20MMU |
|---|---|---|---|---|---|---|
| Package | 32-VFQFN (MLF) exposed pad | 32-VFQFN (MLF) - same | 32-VFQFN (MLF) - same | 32-VFQFN (MLF) - same | 32-VFQFN (MLF) - same | 32-VFQFN (MLF) - same |
| Brand | Microchip Technology (Atmel) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Supply Voltage Range | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 2.7 V to 5.5 V | 1.8 V to 5.5 V (PA) | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Maximum Clock Speed | 10 MHz | 10 MHz | 10 MHz | 20 MHz | 20 MHz | 20 MHz |
| Flash / SRAM / EEPROM | 4 KB / 512 B / 256 B | 4 KB / 512 B / 256 B | 4 KB / 512 B / 256 B | 4 KB / 512 B / 256 B | 4 KB / 512 B / 256 B | 4 KB / 512 B / 256 B |
| Power Technology | V (low voltage) | V (low voltage) | PV | picoPower | standard | P (picoPower class) |
| Packaging Format | Tray (MI) | Tape & Reel (MU) | Tape & Reel (MUR) | Tape & Reel (MUR) | Tray (MI) | Tape & Reel (MMU) |
| On-Chip Debug | debugWIRE | debugWIRE | debugWIRE | debugWIRE | debugWIRE | debugWIRE |
Key Differentiators
- Full 1.8V low-voltage operation (vs ATMEGA48-20MI)
- 20MHz picoPower upgrade path (vs ATMEGA48PA-MUR)
- Identical die in reel packaging (vs ATMEGA48V-10MU)
Design Notes
The 32-pad VFQFN/MLF uses perimeter pads plus a central exposed pad that must be soldered to a ground flood for mechanical reliability and thermal performance. Use a 4x4 array of small vias under the exposed pad to tie the die paddle to the internal ground plane without excessive solder wicking. Note that VCC and GND are duplicated (pins 4/6 and 3/5/21); connect all of them on the PCB - do not leave redundant power pins floating. Allow keep-out for the MLF's pad geometry when designing the stencil.
Connect AVCC (pin 18) to VCC through a low-pass RC network (e.g. 10 ohm resistor and 100 nF capacitor, per the datasheet ADC chapter) even if the ADC is unused, to guarantee the device powers correctly. Decouple each VCC pin with 100 nF close to the package. When operating near 1.8V, keep BOD (brown-out detector) enabled at the lowest trip level or disabled per the datasheet's minimum-voltage table, since BOD levels are voltage-dependent.
ISP programming shares PB3/PB4/PB5 (MOSI/MISO/SCK) and RESET (PC6). Provide a 6-pin ISP header or pad set on the layout, and avoid loads on these pins that exceed the programmer's drive (a 10k series resistor on MOSI/SCK helps). debugWIRE requires the DWEN fuse and disables RESET as reset pin - to re-enable ISP you must perform a high-voltage parallel-style recovery or use the debugWIRE-to-ISP procedure in AVR Studio. Design the RESET pull-up (10k) from the start.
Compliance Information
Compliance status not stated in the verified web data; the MI suffix indicates industrial temperature grade. Distributor product pages (Mouser, Hotenda) typically list RoHS/lead-free status - verify before order.
