ATMEGA48V-10MMU - 8-bit AVR MCU, 4KB Flash, 10MHz, 1.8-5.5V | Microchip
MPN: ATMEGA48V-10MMU β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.45 | $2.45 |
| 10 | $2.21 | $22.10 |
| 100 | $1.86 | $186.00 |
| 500 | $1.58 | $790.00 |
| 1,000 | $1.39 | $1,390.00 |
ATMEGA48V-10MMU Overview
An 8-bit AVR microcontroller is a single-chip RISC processor with integrated program flash, SRAM, EEPROM, and peripherals such as timers, ADC, and serial interfaces. Within the power-management hierarchy of an embedded system, the MCU sits at the control layer, executing user firmware that supervises sensors, actuators, and communication links. The ATmega family achieves throughput approaching 1 MIPS per MHz by executing most of its 131 instructions in a single clock cycle.
Key features of the ATMEGA48V-10MMU include 23 general-purpose I/O lines, 32 general-purpose working registers, three flexible timer/counters with compare modes, an internal oscillator, and a 10-bit ADC. The 'V' grade supports a wide 1.8 V to 5.5 V supply range, and Atmel picoPower technology delivers low sleep-mode currents for battery-operated designs. In-System Programming (ISP) via the SPI interface allows firmware updates without removing the device from the board.
Architecturally, the AVR uses a Harvard structure with separate program and data buses, enabling single-cycle instruction fetch and execution. The device also supports two-wire (I2C) and USART serial interfaces, interrupt-driven operation, and multiple sleep modes including power-down and power-save for energy-sensitive applications.
Typical applications include battery-powered sensor nodes, small appliance and HVAC control boards, industrial remote monitoring, and consumer electronics requiring a compact 4x4 mm footprint with industrial temperature range of -40C to +85C.
A key design consideration: the 4 KB flash limits complex firmware, so engineers should budget code size carefully or step up to the pin-compatible ATmega88V/168V with larger flash. Also note the datasheet recommends the newer ATMEGA48PA for new designs.
This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATMEGA48V-10MMU 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-10MMU (same form factor and footprint) β differing in Flash Memory, Operating Temperature, Package, RoHS Status, Serial Interfaces.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATMEGA48PV-10MMU
β Drop-Inβ In Stock
$0.71 / Unit
View Datasheet βATMEGA48A-MMU
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA88V-10MMU
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA168V-10MMU
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA48V-10MMU Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit AVR RISC |
| Flash Memory | 4 KB (2K x 16) In-System Programmable |
| EEPROM | 256 B |
| SRAM | 512 B |
| Maximum Clock Speed | 10 MHz |
| Supply Voltage Range | 1.8 V to 5.5 V |
| General Purpose I/O | 23 lines |
| ADC Resolution | 10-bit |
| Timers | Two 8-bit, one 16-bit with compare modes |
| Serial Interfaces | USART, SPI, Two-Wire (I2C-compatible) |
| In-System Programming | Yes (ISP via SPI) |
| Low Power Technology | picoPower |
| Operating Temperature | -40C to +85C (industrial) |
| Package | 28-VQFN (4x4 mm), 0.45 mm pitch, exposed pad |
| Mounting Type | Surface Mount |
| Lifecycle Stage | Active (newer device ATMEGA48PA available) |
| RoHS Status | Green / RoHS compliant package |
ATMEGA48V-10MMU Pin Configuration
| Pin 1 | PD3 β Port D, bit 3 (GPIO / OC2B) |
| Pin 2 | PD4 β Port D, bit 4 (GPIO / XCK/T0) |
| Pin 3 | GND β Ground |
| Pin 4 | VCC β Digital supply voltage (1.8-5.5 V) |
| Pin 5 | GND β Ground |
| Pin 6 | VCC β Digital supply voltage |
| Pin 7 | PB6 β Port B, bit 6 (XTAL1 / TOSC1) |
| Pin 8 | PB7 β Port B, bit 7 (XTAL2 / TOSC2) |
| Pin 9 | PD5 β Port D, bit 5 (GPIO / OC0B/T1) |
| Pin 10 | PD6 β Port D, bit 6 (GPIO / OC0A/AIN0) |
| Pin 11 | PD7 β Port D, bit 7 (GPIO / AIN1) |
| Pin 12 | PB0 β Port B, bit 0 (GPIO / ICP1/CLKO) |
| Pin 13 | PB1 β Port B, bit 1 (GPIO / OC1A) |
| Pin 14 | PB2 β Port B, bit 2 (GPIO / OC1B/SS) |
| Pin 15 | PB3 β Port B, bit 3 (GPIO / OC2A/MOSI) |
| Pin 16 | PB4 β Port B, bit 4 (GPIO / MISO) |
| Pin 17 | PB5 β Port B, bit 5 (GPIO / SCK) |
| Pin 18 | AVCC β ADC supply voltage |
| Pin 19 | AREF β Analog reference for ADC |
| Pin 20 | GND β Ground |
| Pin 21 | PC0 β Port C, bit 0 (ADC0) |
| Pin 22 | PC1 β Port C, bit 1 (ADC1) |
| Pin 23 | PC2 β Port C, bit 2 (ADC2) |
| Pin 24 | PC3 β Port C, bit 3 (ADC3) |
| Pin 25 | PC4 β Port C, bit 4 (ADC4 / SDA) |
| Pin 26 | PC5 β Port C, bit 5 (ADC5 / SCL) |
| Pin 27 | PC6 β Port C, bit 6 (RESET, active low) |
| Pin 28 | PD0 β Port D, bit 0 (GPIO / RXD) |
Typical Applications
ATMEGA48V-10MMU is suitable for 6 applications: Battery-Powered Sensor Nodes, Small Appliance and HVAC Control Boards, Industrial Remote Monitoring and Data Loggers, Consumer Electronics and Toys, Motor Control and PWM Actuation Modules, Prototyping and Embedded Education.
Battery-Powered Sensor Nodes
The ATMEGA48V-10MMU fits battery-powered sensor nodes because its 1.8 V to 5.5 V supply range matches single-cell lithium supplies and its picoPower sleep modes minimize standby drain between wake events. The 10-bit ADC digitizes temperature, humidity, or voltage sensor signals directly without an external converter, while the two-wire interface reads digital sensors. Firmware typically runs from the internal oscillator at reduced frequency to cut active current. A quantified benefit: sleeping in power-down mode with periodic watchdog wake allows multi-month operation from a coin cell, versus days for an always-on 8-bit core.
Recommended
Small Appliance and HVAC Control Boards
Home appliance and HVAC control boards use the ATMEGA48V-10MMU to drive buttons, relays, and LED indicators with its 23 GPIO lines and three timer/counters providing PWM for fan or heater control. The 4x4 mm VQFN saves board area in compact control modules, and the 1.8-5.5 V range tolerates noisy 5 V rails. The 10-bit ADC reads potentiometers, NTC thermistors, or mains-derived feedback through dividers. Timer compare modes generate precise PWM without CPU intervention, freeing flash for state-machine logic. The 4 KB flash suits discrete control logic; designs needing additional features can drop in pin-compatible ATmega88V/168V variants without PCB changes.
Recommended
Industrial Remote Monitoring and Data Loggers
Industrial monitoring nodes benefit from the ATMEGA48V-10MMU's -40C to +85C industrial temperature range and wide 1.8-5.5 V tolerance for unregulated supply inputs. The USART streams logged data to RS-485 or wireless modules, while 256 B EEPROM retains calibration constants and cumulative counters across power cycles. The three timer/counters timestamp external events from flow meters or encoders. Watchdog and brown-out detection protect long-term unattended operation. Compared with larger MCUs, the 512 B SRAM limits buffer depth, so designers log to external EEPROM or constrain sampling intervals; firmware footprint remains small, making the 4 KB flash sufficient for most logging loops.
Recommended
Consumer Electronics and Toys
Cost-sensitive consumer products such as toys, remote controls, and small displays use the ATMEGA48V-10MMU where a sub-$2 MCU with 23 GPIO and on-chip oscillator keeps the bill of materials minimal. The internal RC oscillator removes the external crystal for non-timing-critical firmware, saving two components and board area. The 4x4 mm VQFN fits slim enclosures. The 10-bit ADC reads cheap analog joysticks or battery voltage, and timer PWM drives LEDs, buzzers, or small motors. The 10 MHz 'V' grade provides adequate speed for button scanning and IR protocols at 3 V, with RoHS-green packaging meeting consumer environmental requirements.
Recommended
Motor Control and PWM Actuation Modules
The ATMEGA48V-10MMU generates 8-bit and 16-bit PWM outputs from its three timer/counters for driving DC motors, servos, and LED dimmers in compact actuation modules. Timer1 in 16-bit mode produces high-resolution servo pulses, while the 8-bit timers handle complementary PWM channels. The 10-bit ADC samples back-EMF, current shunt, or potentiometer feedback for closed-loop speed control. Operating at 5 V provides robust logic levels for gate drivers and MOSFET drivers on the same board. The 4 KB flash accommodates PID loops and a Modbus-lite command parser; the 0.45 mm pitch 4x4 mm VQFN keeps the controller block within a 5x5 mm footprint.
Recommended
Prototyping and Embedded Education
Engineering teams and classrooms use the ATMEGA48V-10MMU as an entry point into the AVR architecture that underpins the widely documented Arduino ecosystem. Its 131 mostly single-cycle instructions, 32 working registers, and 1 MIPS/MHz throughput teach RISC fundamentals clearly, while ISP programming through the SPI header requires only a low-cost programmer. The same codebase scales directly to pin-compatible ATMEGA88V and ATMEGA168V parts when projects outgrow 4 KB flash, making the ATmega48 an intentional first step. The 28-VQFN (4x4 mm) package teaches professional SMT layout practices including exposed-pad thermal grounding on standard two-layer PCBs.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA48V-10MMU β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA48PV-10MMU | ATMEGA48A-MMU | ATMEGA88V-10MMU | ATMEGA168V-10MMU |
|---|---|---|---|---|---|
| Package | 28-VQFN (4x4 mm) | 28-VQFN (4x4 mm) - same | 28-VQFN (4x4 mm) - same | 28-VQFN (4x4 mm) - same | 28-VQFN (4x4 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 4 KB | 4 KB | 4 KB | 8 KB | 16 KB |
| SRAM | 512 B | 512 B | 512 B | 1 KB | 1 KB |
| EEPROM | 256 B | 256 B | 256 B | 512 B | 512 B |
| Maximum Clock Speed | 10 MHz | 10 MHz | 20 MHz | 10 MHz | 10 MHz |
| Supply Voltage | 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 |
| Low Power Technology | picoPower (V grade) | picoPower (PV grade, newer silicon) | Standard A grade | picoPower (V grade) | picoPower (V grade) |
Key Differentiators
- Lowest-cost entry point of the ATmega48/88/168 family (vs ATMEGA168V-10MMU)
- Identical footprint with more memory headroom available (vs ATMEGA88V-10MMU)
- 20 MHz capable successor silicon (vs ATMEGA48A-MMU)
Design Notes
Connect AVCC (pin 18) to VCC through a low-pass filter (typically an LC or RC network) even if the ADC is unused - the datasheet requires AVCC within 0.3 V of VCC for correct digital operation. Decouple each VCC pad and AVCC with 100 nF ceramics placed within 2 mm of the pads, and add 10 uF bulk capacitance. At 5 V and 10 MHz, active current is a few mA (datasheet figure), so an LDO such as a 3.3 V or 5 V regulator handles supply easily; brown-out detection should be enabled via fuse for reliability on battery supplies.
The 28-VQFN (4x4 mm) package has a 0.45 mm pad pitch and center exposed pad that must be soldered to a grounded thermal pad for mechanical reliability and ground return. Define the footprint pad extensions carefully: 0.25-0.3 mm pad extension outward avoids bridging at 0.45 mm pitch. Via-in-pad or four 0.3 mm vias under the exposed pad connect it to the ground plane. Follow Microchip's QFN land-pattern application guidance; inspect with X-ray or AOI because the center pad is invisible after reflow.
PC6 is RESET by default (active-low, via fuse). If PC6 is programmed as GPIO, in-system programming via ISP becomes impossible - a common one-way mistake. Reserve a 100 nF to 10 kOhm reset network on PC6 for field serviceability. Also note the 4 KB flash fills quickly: enable LTO optimization, avoid printf, and check map-file utilization before committing. Finally, Microchip's datasheet header flags ATMEGA48PA as the newer recommended device - for new designs evaluate the PA generation first.
Compliance Information
Package described as GREEN plastic in datasheet summary (digchip), indicating RoHS-compliant green packaging. REACH and conflict-minerals declarations not found in provided data - obtain certificates from Microchip's environmental portal.
