ATMEGA48V-10MMH - 8-Bit AVR MCU 4KB Flash 10MHz QFN-28 | Microchip
MPN: ATMEGA48V-10MMH ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.08 | $2.08 |
| 10 | $1.87 | $18.70 |
| 100 | $1.6 | $160.00 |
| 500 | $1.35 | $675.00 |
| 1,000 | $1.15 | $1,150.00 |
ATMEGA48V-10MMH Overview
A microcontroller (MCU) is a single-chip computer integrating a CPU core, program memory, data memory, and peripherals such as timers, ADCs, and communication interfaces. Within the power-management and embedded-system hierarchy, an 8-bit MCU like the AVR ATmega family occupies the entry-to-mid tier of embedded processing, sitting above discrete logic and below 32-bit ARM cores, and is widely used where cost, power efficiency, and ease of programming matter more than raw compute throughput.
Key features include the AVR Advanced RISC architecture with 131 powerful instructions, most executing in a single clock cycle; 32 general-purpose 8-bit working registers; 23 general-purpose I/O lines; and three flexible timer/counters with compare modes and PWM. A 10-bit ADC with up to 8 single-ended channels (6 external on the 28-pin package, plus 2 differential channels via ADC6/ADC7 available on QFN packages) and an internal bandgap reference enable accurate analog sensing.
The picoPower technology platform offers multiple sleep modes (Idle, ADC Noise Reduction, Power-save, Power-down, Standby, and Extended Standby) with very low quiescent consumption in Power-down mode, which is essential for coin-cell and energy-harvesting products. The V-suffix voltage rating (1.8V-5.5V) and H-suffix automotive-grade temperature qualification extend operation into harsh environments, and the part is manufactured in green, RoHS-compliant packaging. Programming and debugging occur in-system via SPI using standard Microchip tools (ISP, debugWIRE via the RESET line, and parallel HV programming).
Typical applications include battery-powered sensor nodes, small industrial control and monitoring boards, automotive body and comfort modules, consumer appliance controls, and RS-485/UART-based communication peripherals where a compact 4x4 mm footprint and low-voltage operation are required.
A key design consideration: the 10MHz maximum clock frequency must be respected across the full supply range; the ATmega48 clock-versus-voltage safety margin means that running near 1.8V requires conservative speed, andBrown-out detection should be enabled to guarantee code integrity during supply droops.
This page synthesizes verified distributor pricing, drop-in alternatives, pinout data, and practical design notes not consolidated in the manufacturer datasheet, providing engineers with a complete selection and sourcing reference for the ATMEGA48V-10MMH.
Drop-in alternatives for ATMEGA48V-10MMH — 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-10MMH (same form factor and footprint) — differing in Package, RoHS Status, Flash Memory, ADC, Serial Interfaces.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATMEGA48V-10MMU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.39 / Unit
View Datasheet →ATMEGA48A-MMH
✅ Drop-In✓ In Stock
$0.86 / Unit
View Datasheet →ATMEGA48PV-10MMU
✅ Drop-In✓ In Stock
$0.71 / Unit
View Datasheet →ATMEGA48PA-MMNR
✅ Drop-In✓ In Stock
$1.33 / Unit
View Datasheet →ATMEGA48P-20MMU
✅ Drop-In✓ In Stock
$0.1698 / Unit
View Datasheet →ATMEGA328-MMH
✅ Drop-In✓ In Stock
$1.66 / Unit
View Datasheet →ATMEGA48V-10MMH Maximum Ratings & Electrical Characteristics
| Core Architecture | AVR 8-bit RISC |
| Core Size | 8-bit |
| Program Memory Size | 4KB (2K x 16) FLASH |
| EEPROM Size | 256B |
| RAM Size | 512B |
| Maximum Clock Frequency | 10 MHz |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Number of I/O | 23 |
| ADC Resolution | 10-bit |
| ADC Channels | 8 single-ended (6 external + 2 differential ADC6/ADC7 on QFN) |
| Timers | 3 timer/counters with compare modes and PWM |
| Communication Interfaces | SPI, UART, I2C (TWI) |
| Sleep Modes | Idle, ADC Noise Reduction, Power-save, Power-down, Standby, Extended Standby |
| Package | 28-VQFN (4x4 mm), 1 mm height, 0.45 mm pitch, exposed pad |
| Mounting Type | Surface Mount |
| Instructions | 131 instructions, most single-cycle |
| Working Registers | 32 x 8-bit general purpose |
| Programming Interfaces | SPI ISP, debugWIRE, parallel HV |
| RoHS Status | Compliant (green package) |
ATMEGA48V-10MMH Pin Configuration
| Pin 1 | PC6 (RESET) — Reset input / I/O - active-low reset with internal pull-up |
| Pin 2 | PD0 (RXD) — Port D bit 0 / UART receive |
| Pin 3 | PD1 (TXD) — Port D bit 1 / UART transmit |
| Pin 4 | PD2 (INT0) — Port D bit 2 / External interrupt 0 |
| Pin 5 | PD3 (INT1/OC2B) — Port D bit 3 / External interrupt 1 / Timer2 output compare B |
| Pin 6 | PD4 (T0/XCK) — Port D bit 4 / Timer0 external clock / USART external clock |
| Pin 7 | VCC — Digital supply voltage (1.8V to 5.5V) |
| Pin 8 | GND — Ground |
| Pin 9 | PB6 (XTAL1/TOSC1) — Port B bit 6 / Crystal oscillator input or timer oscillator |
| Pin 10 | PB7 (XTAL2/TOSC2) — Port B bit 7 / Crystal oscillator output or timer oscillator |
| Pin 11 | PD5 (T1/OC0B) — Port D bit 5 / Timer1 external clock / Timer0 output compare B |
| Pin 12 | PD6 (AIN0/OC0A) — Port D bit 6 / Analog comparator positive input / Timer0 output compare A |
| Pin 13 | PD7 (AIN1) — Port D bit 7 / Analog comparator negative input |
| Pin 14 | PB0 (ICP1/CLKO) — Port B bit 0 / Timer1 input capture / System clock output |
| Pin 15 | PB1 (OC1A) — Port B bit 1 / Timer1 output compare A (PWM) |
| Pin 16 | PB2 (SS/OC1B) — Port B bit 2 / SPI slave select / Timer1 output compare B (PWM) |
| Pin 17 | PB3 (MOSI/OC2A) — Port B bit 3 / SPI master output / Timer2 output compare A (PWM) |
| Pin 18 | PB4 (MISO) — Port B bit 4 / SPI master input |
| Pin 19 | PB5 (SCK) — Port B bit 5 / SPI serial clock |
| Pin 20 | AVCC — ADC supply voltage - connect to VCC through low-pass network |
| Pin 21 | AREF — ADC analog reference input |
| Pin 22 | GND — Ground |
| Pin 23 | PC0 (ADC0) — Port C bit 0 / ADC channel 0 |
| Pin 24 | PC1 (ADC1) — Port C bit 1 / ADC channel 1 |
| Pin 25 | PC2 (ADC2) — Port C bit 2 / ADC channel 2 |
| Pin 26 | PC3 (ADC3) — Port C bit 3 / ADC channel 3 |
| Pin 27 | PC4 (ADC4/SDA) — Port C bit 4 / ADC channel 4 / TWI data line |
| Pin 28 | PC5 (ADC5/SCL) — Port C bit 5 / ADC channel 5 / TWI clock line |
Typical Applications
ATMEGA48V-10MMH is suitable for 6 applications: Battery-Powered Sensor Nodes, Automotive Body and Comfort Modules, Industrial Control and Monitoring Boards, Consumer Appliance Controls, UART/I2C Communication Bridges, LED Lighting and Dimming Control.
Battery-Powered Sensor Nodes
The ATMEGA48V-10MMH fits battery-powered sensor nodes because its 1.8V minimum supply allows direct operation from two alkaline or NiMH cells, and its six picoPower sleep modes keep average current extremely low during duty-cycled sampling. A typical design wakes via watchdog or pin-change interrupt, powers the sensor rail, takes a 10-bit ADC reading, packages the result over UART or I2C to a radio, then re-enters Power-down. The 4KB FLASH holds compact sensor drivers and protocol code, while 512B SRAM buffers measurement packets. Because the MCU runs at 10MHz maximum, timing-critical radio bit-banging should be avoided in favor of hardware SPI or TWI peripherals, trading raw speed for minimal energy per sample and multi-month battery life.
Recommended
Automotive Body and Comfort Modules
The H suffix on ATMEGA48V-10MMH designates Microchip's automotive-grade option, making it appropriate for body electronics and comfort modules such as seat-position memory, mirror control, interior lighting, and small actuator sequencing. The 28-VQFN 4x4 mm package saves PCB area in tight module housings, and the 1.8V-5.5V supply range tolerates rail variation after load-dump protection stages. Its three timers with PWM drive LED dimming and motor control, while the 10-bit ADC reads position pots and NTC temperature sensors. Firmware is programmed via SPI ISP on the production line. Designers should enable brown-out detection, validate the exact AEC qualification temperature grade in the datasheet ordering table, and budget watchdog supervision for functional-safety reviews.
Recommended
Industrial Control and Monitoring Boards
In compact industrial controllers, the ATMEGA48V-10MMH provides a low-cost 8-bit control core with 23 GPIO lines for relay driving, switch polling, and status LED multiplexing. The 10-bit ADC with internal bandgap reference reads 0-5V analog sensor inputs (pressure, level, temperature) with acceptable accuracy for non-critical loops, and hardware UART connects to RS-485 transceivers for Modbus RTU slave nodes. The 10MHz clock handles deterministic polling loops comfortably, and Power-save mode keeps the node responsive during idle periods on auxiliary supplies. PCB designers should route the exposed pad to a ground plane for thermal and EMI performance and use the 0.45 mm pitch land pattern per the datasheet package drawing for reliable wave or reflow soldering.
Recommended
Consumer Appliance Controls
Consumer appliances - coffee makers, fans, small pumps, and charger cradles - benefit from the ATMEGA48V-10MMH's combination of low cost, wide 1.8V-5.5V supply, and integrated peripherals. Button decoding via pin-change interrupts, buzzer PWM from a timer, and ADC reading of NTC sensors cover the typical appliance feature set within 4KB FLASH. The 28-VQFN footprint suits compact single-board control panels, and the green RoHS-compliant package satisfies regulatory requirements. Firmware is field-updatable only via ISP programming headers, so designers should reserve a programming pad set in the layout. The 10MHz rating is ample for UI scanning and PWM generation; power-down sleep between user interactions reduces standby consumption toward regulatory energy limits.
Recommended
UART/I2C Communication Bridges
The ATMEGA48V-10MMH works well as a protocol bridge between UART-based hosts and I2C (TWI) peripherals such as EEPROMs, RTCs, and sensor hubs. Its hardware TWI master/slave and hardware UART run concurrently without CPU bit-banging, and 512B SRAM provides small buffering windows adequate for register-map translation tasks. Operating as an inline translator at 9600-115200 baud, the 10MHz core services both interfaces with headroom for CRC checks and timeout logic. On the QFN package, differential ADC channels ADC6/ADC7 free the main port pins for communication. Designers should set accurate baud-rate divider fuses, enable TWI bus-clear recovery logic in firmware, and use the SPI ISP header for factory programming and maintenance.
Recommended
LED Lighting and Dimming Control
The ATMEGA48V-10MMH drives LED dimming and color-mixing controls using its three timer/counters: two 8-bit timers and one 16-bit timer generate hardware PWM channels without CPU load, enabling flicker-free dimming at frequencies above 200 Hz from a 10MHz clock. The 10-bit ADC reads potentiometers, ambient-light sensors, or NTC temperature sensors for thermal foldback, protecting LED strings by reducing duty cycle when the heatsink nears limits. Its 1.8V-5.5V range matches 3.3V or 5V driver-logic rails, and Power-down mode supports off-state standby targets. Firmware for touch-button or IR remote decoding fits within 4KB FLASH. Gate-drive level shifting to the LED driver MOSFETs follows standard low-side PWM topologies from Microchip's AVR application notes.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA48V-10MMH — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA48V-10MMU | ATMEGA48A-MMH | ATMEGA48PV-10MMU | ATMEGA48PA-MMNR | ATMEGA328-MMH |
|---|---|---|---|---|---|---|
| Package | 28-VQFN (4x4 mm) exposed pad | 28-VQFN (4x4 mm) - same | 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 | Microchip Technology |
| Max Clock Frequency | 10 MHz | 10 MHz | 20 MHz | 10 MHz | 20 MHz | 20 MHz |
| FLASH Memory | 4KB | 4KB | 4KB | 4KB | 4KB | 32KB |
| SRAM | 512B | 512B | 512B | 512B | 512B | 2KB |
| Supply Voltage | 1.8V - 5.5V | 1.8V - 5.5V | 1.8V - 5.5V | 1.8V - 5.5V | 1.8V - 5.5V | 1.8V - 5.5V |
| Power Technology | ATmega48 (V grade) | ATmega48 (V grade) | ATmega48A enhanced | picoPower | picoPower | ATmega328 |
| Temperature Grade | Automotive (H suffix) | Industrial (U suffix) | Automotive (H suffix) | Industrial (U suffix) | Automotive (NR suffix) | Automotive (H suffix) |
Key Differentiators
- Automotive-grade qualification at V-grade low-voltage rating (vs ATMEGA48V-10MMU)
- Lowest power option among pin-compatible family members (vs ATMEGA48A-MMH)
- picoPower upgrade path without PCB change (vs ATMEGA48PV-10MMU)
- Memory-constrained cost optimization vs same-footprint ATmega328 (vs ATMEGA328-MMH)
Design Notes
Solder the 28-VQFN 4x4 mm exposed pad to a ground-plane thermal via array (typically a 3x3 or 4x4 via pattern under the pad) to achieve both reliable grounding and thermal dissipation. The 0.45 mm lead pitch requires a solder-mask-defined or NSMD land pattern per the datasheet package drawing; verify stencil aperture design (typically 0.23-0.25 mm pads with 60-70% coverage) for reflow. Place 100 nF ceramic decoupling capacitors within 2 mm of VCC (pin 7) and AVCC (pin 20), with AVCC fed through an LC low-pass filter from VCC to preserve ADC accuracy.
The 1.8V-5.5V supply range interacts with the 10MHz clock limit: maximum safe operating frequency falls as VCC decreases, so at voltages near 1.8V the practical clock should be well below 10MHz per the maximum frequency versus VCC curve in the Microchip datasheet. Enable brown-out detection (BOD) appropriate to the minimum rail voltage to prevent FLASH and EEPROM corruption during brown-outs, and allow EEPROM write operations only above the specified write-margin voltage. For battery designs, exploit Power-down mode with watchdog wake-up rather than polling loops in Idle mode for the lowest average current.
When using an external crystal on PB6/PB7 (pins 9/10), follow Microchip's AVR hardware design recommendations: place the crystal and its load capacitors within a few millimeters of the pins over a solid ground plane, and select the correct CKOPT-style fuse/low-power oscillator option for the crystal drive level and supply voltage. Keep SPI (PB3-PB5) and TWI (PC4/PC5) traces short, add appropriate series resistors on TWI lines matching bus capacitance, and avoid routing the RESET trace (pin 1) adjacent to switching signals, since debugWIRE uses this single line and noise coupling can cause spurious resets.
Common mistakes with this part: forgetting to tie AVCC (pin 20) to VCC even when the ADC is unused - the device will not run correctly without AVCC supplied; leaving RESET (pin 1) floating instead of using a 10 kOhm pull-up; and over-running the 10MHz limit at low VCC. Also note that 512B SRAM fills quickly with stacked library code - monitor stack usage in firmware, and do not enable clock prescaler fuses (CKDIV8) unintentionally, which yields 1.25MHz from an 10MHz source and breaks baud-rate calculations.
Compliance Information
DigChip data describes the package as 'GREEN, PLASTIC', consistent with Microchip's green/RoHS-compliant, halogen-free packaging policy. The H suffix indicates the automotive-grade product designation; exact AEC-Q100 temperature grade should be confirmed in the Microchip datasheet ordering table.
