ATMEGA48V-10PU - 4KB Flash AVR MCU, 1.8V, 10MHz | Microchip
MPN: ATMEGA48V-10PU ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.55 | $1.55 |
| 10 | $1.39 | $13.90 |
| 100 | $1.19 | $119.00 |
| 500 | $1.02 | $510.00 |
| 1,000 | $0.89 | $890.00 |
ATMEGA48V-10PU Overview
An 8-bit AVR microcontroller is a single-chip computer based on the AVR enhanced RISC architecture, executing most instructions in a single clock cycle for throughput close to 1 MIPS per MHz. MCUs sit at the bottom of the embedded processing hierarchy (microcontroller -> embedded processor -> semiconductor), integrating CPU, program memory, data memory, timers, ADC, and communication peripherals on one die.
Key features include 131 powerful instructions with mostly single-cycle execution, 32 general-purpose working registers, an 8-channel 10-bit ADC (in TQFP/QFN packages; fewer channels accessible in PDIP), three flexible timer/counters with compare modes, and debugWIRE on-chip debugging. A picoPower-class design supports multiple sleep modes with sub-uA power-down current, making the device suitable for battery-powered designs.
The architecture pairs the AVR core with a Harvard memory bus, separating Flash program memory from SRAM for deterministic execution. In-System Programming via SPI and self-programming support simplify field updates and bootloader implementations.
Typical applications include hobbyist and educational breadboard projects (the through-hole PDIP package is Arduino-IDE and ISP-programmer friendly), battery-powered sensor nodes, appliance control, and simple motor or LED control systems.
Design consideration: at 1.8V the maximum clock frequency is 10MHz and the ADC reference range is reduced; always consult the frequency-versus-voltage derating curve before overclocking.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATMEGA48V-10PU — 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-10PU (same form factor and footprint) — differing in ADC Channels, EEPROM, RoHS Status, SRAM, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATMEGA48PA-PU
✅ Drop-In✓ In Stock
$2.05 / Unit
View Datasheet →ATMEGA48-20PI
✅ Drop-In✓ In Stock
$0.98 / Unit
View Datasheet →ATMEGA88V-10PU
✅ Drop-In📋 Reference alternative (not in catalog)
ATMEGA168V-10PU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.01 / Unit
View Datasheet →ATMEGA88PA-PU
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
ATMEGA48V-10PU Maximum Ratings & Electrical Characteristics
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 10 MHz |
| Flash Memory Size | 4 KB (2K x 16) |
| EEPROM Size | 256 B |
| RAM Size | 512 B |
| Number of I/O | 23 |
| Operating Voltage Range | 1.8 V to 5.5 V |
| ADC Resolution | 10-bit |
| ADC Channels | 8 (TQFP/QFN); 6 accessible in PDIP |
| Timers | 3 (two 8-bit, one 16-bit) |
| Communication Interfaces | SPI, I2C (TWI), UART |
| On-Chip Debug | debugWIRE |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 28-PDIP (0.300 in, 7.62 mm) |
| Mounting Type | Through-Hole |
| Programmability | In-System Programmable (SPI ISP) |
| RoHS Status | Compliant (GREEN) |
ATMEGA48V-10PU Pin Configuration
| Pin 1 | PC6/RESET — Port C bit 6 or active-low Reset input |
| Pin 2 | PD0/RXD — Port D bit 0 / USART receive input |
| Pin 3 | PD1/TXD — Port D bit 1 / USART transmit output |
| Pin 4 | PD2/INT0 — Port D bit 2 / external interrupt 0 |
| Pin 5 | PD3/INT1 — Port D bit 3 / external interrupt 1 |
| Pin 6 | PD4/T0/XCK — Port D bit 4 / timer 0 counter input / 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 pin 1 / timer oscillator input |
| Pin 10 | PB7/XTAL2/TOSC2 — Port B bit 7 / crystal oscillator pin 2 / timer oscillator output |
| Pin 11 | PD5/T1/OC0B — Port D bit 5 / timer 1 counter input / 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/PCINT23 — Port D bit 7 / analog comparator negative input |
| Pin 14 | PB0/ICP1/CLKO/PCINT0 — Port B bit 0 / Timer1 input capture / clock output |
| Pin 15 | PB1/OC1A/PCINT1 — Port B bit 1 / Timer1 output compare A |
| Pin 16 | PB2/SS/OC1B/PCINT2 — Port B bit 2 / SPI slave select / Timer1 output compare B |
| Pin 17 | PB3/MOSI/OC2A/PCINT3 — Port B bit 3 / SPI master output / Timer2 output compare A |
| Pin 18 | PB4/MISO/PCINT4 — Port B bit 4 / SPI master input |
| Pin 19 | PB5/SCK/PCINT5 — Port B bit 5 / SPI clock |
| Pin 20 | AVCC — ADC supply voltage; connect to VCC via low-pass filter |
| 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-10PU is suitable for 6 applications: Educational and Hobbyist Breadboard Projects, Battery-Powered Sensor Nodes, Industrial Control and Automation, Home Appliance and Consumer Electronics Control, Motor and LED Control Systems, IoT Sensor Peripherals and Sub-Nodes.
Educational and Hobbyist Breadboard Projects
The 0.3-inch 28-PDIP through-hole package makes the ATMEGA48V-10PU one of the most breadboard-friendly microcontrollers available: all 28 pins fit a standard solderless breadboard without adapters, and the chip survives repeated insertion cycles. With a 1.8V-5.5V supply range, students can power it from two AA cells or a USB 5V rail and clock it from an external crystal, resonator, or the internal RC oscillator. Programming requires only five ISP lines (MOSI, MISO, SCK, RESET, GND) from a low-cost USBasp. The 4KB Flash holds compact C or Arduino-framework code, and the 23 I/O lines drive LEDs, buttons, and small displays directly. This combination of simplicity, toolchain access, and forgiving voltage range is why the part remains a staple in electronics education.
Recommended
Battery-Powered Sensor Nodes
The V-grade ATMEGA48V-10PU is designed for energy-constrained nodes: it runs from 1.8V to 5.5V, meaning two NiMH cells, a lithium coin cell, or a single Li-ion cell all work without a regulator's quiescent-current penalty. The AVR core offers six sleep modes; in power-down mode the watchdog timer can wake the MCU on interval, sample a sensor through the 10-bit ADC, transmit a byte over UART or TWI, and return to sleep within milliseconds. Duty-cycling at 1% with a 1MHz internal oscillator keeps average current in the tens of uA range, extending battery life to months. The 256B EEPROM stores calibration and logging data across power cycles. Designers should keep clock speed at or below the frequency-voltage derating curve to remain within specification at low cell voltages.
Recommended
Industrial Control and Automation
With a -40C to +85C industrial temperature rating, the ATMEGA48V-10PU operates reliably on factory floors and in unheated enclosures where consumer-grade parts fail. The three timer/counters support PWM motor control, quadrature encoder counting, and precision event timing; the TWI (I2C) and SPI interfaces connect industrial sensors, EEPROMs, and displays; and the hardware UART links to RS-485 transceivers for multi-drop networks. The 10-bit ADC (six channels accessible in PDIP) reads 0-5V transducers such as potentiometers, pressure sensors, and thermistors. Brown-out detection and watchdog timer provide robust fault recovery in electrically noisy environments. Its through-hole package also simplifies field replacement in legacy industrial equipment that predates surface-mount service tooling.
Recommended
Home Appliance and Consumer Electronics Control
Cost-sensitive appliance control boards benefit from the ATMEGA48V-10PU's low unit price, integrated peripherals, and minimal external component count. A single chip can read a rotary encoder and buttons on its GPIO, drive a 7-segment display via multiplexed timers, control a triac or relay through a PWM output, and measure temperature through the 10-bit ADC with the internal 1.1V reference for accuracy. The internal RC oscillator removes the cost of an external crystal in applications where timing tolerance is acceptable. debugWIRE allows single-wire in-circuit debugging through the RESET line during production bring-up, reducing development cycles. For designs requiring more code space as features grow, the pin-compatible ATMEGA88V and ATMEGA168V provide 8KB and 16KB Flash on the same PCB footprint.
Recommended
Motor and LED Control Systems
The ATMEGA48V-10PU provides two 8-bit timer/counters and one 16-bit timer/counter, each with compare and PWM modes, enabling control of DC motors, servo signals, and LED brightness from a single chip. Timer0 and Timer2 generate two independent 8-bit PWM channels while Timer1 contributes a 16-bit PWM suitable for fine-resolution servo control at 50Hz. Outputs can drive power MOSFET gate drivers, H-bridge enable inputs, or LED driver dimming inputs directly at 5V logic levels with 20mA source/sink capability. The 10-bit ADC closes the loop by reading current-sense resistors or position potentiometers. Because the ADC and timers share hardware rather than bit-banged software, PWM jitter stays at zero, which matters for audible-noise-sensitive motor and lighting applications.
Recommended
IoT Sensor Peripherals and Sub-Nodes
In larger IoT installations the ATMEGA48V-10PU serves as an intelligent peripheral that pre-processes sensor data before handing it to a wireless SoC. Its SPI interface streams ADC samples to a radio module, its TWI bus reads I2C environmental sensors, and its hardware UART forwards formatted telemetry to a gateway chip. Running from 1.8V-5.5V lets it share the radio module's supply rail directly. The 4KB Flash is sufficient for sensor drivers, filtering routines, and a simple packet protocol, keeping the BOM cost of each node minimal. Sleep-mode wake-on-interrupt allows the node to idle at sub-milliamp levels and respond to button presses or threshold crossings instantly. When firmware outgrows 4KB, the pin-compatible ATMEGA88V-10PU and ATMEGA168V-10PU double or quadruple the code space with zero PCB changes.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA48V-10PU — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA48PA-PU | ATMEGA48-20PI | ATMEGA88V-10PU | ATMEGA168V-10PU | ATMEGA88PA-PU |
|---|---|---|---|---|---|---|
| Package | 28-PDIP (0.300 in) | 28-PDIP - same | 28-PDIP - same | 28-PDIP - same | 28-PDIP - same | 28-PDIP - same |
| Brand | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) | Microchip Technology (Atmel) |
| Flash Memory | 4 KB ISP Flash | 4 KB ISP Flash | 4 KB ISP Flash | 8 KB ISP Flash | 16 KB ISP Flash | 8 KB ISP Flash |
| SRAM | 512 B | 512 B | 512 B | 1 KB | 1 KB | 1 KB |
| Max Clock Frequency | 10 MHz | 20 MHz (at 4.5-5.5V) | 20 MHz (at 4.5-5.5V) | 10 MHz | 10 MHz | 20 MHz (at 4.5-5.5V) |
| Operating Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 4.5 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 |
| Power Technology | Low-power AVR (V grade) | picoPower | Standard | Low-power (V grade) | Low-power (V grade) | picoPower |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- Widest voltage range in the ATmega48 PDIP family (vs ATMEGA48-20PI)
- Same pinout, 2x memory upgrade path (vs ATMEGA88V-10PU)
- Lower unit cost for memory-constrained firmware (vs ATMEGA168V-10PU)
- picoPower efficiency gap acknowledged (vs ATMEGA48PA-PU)
Design Notes
Connect AVCC (pin 20) to VCC through a low-pass filter (typically a 10uH inductor or 100-ohm resistor with a 0.1uF capacitor to ground) even if the ADC is unused - the datasheet specifies AVCC must be within 0.3V of VCC for correct digital operation. Decouple VCC and AVCC each with 0.1uF ceramic capacitors placed within 5mm of the pins. Estimated: at 5V and 10MHz, active current is roughly 5-6mA (typical per family datasheet curves), so a coin cell needs duty-cycling for battery designs.
Although this is a through-hole PDIP part, layout discipline still matters: keep the AREF pin trace short and place a 0.1uF capacitor from AREF to GND directly at the pin when using the internal 1.1V reference or an external reference; never place a capacitor directly on AREF if you enable the ADC's internal noise canceller in differential mode without checking the datasheet guidance. Route the crystal (pins 9-10) with short traces and load capacitors (typically 12-22pF depending on crystal spec) close to the chip, and surround it with a ground guard trace.
Three frequent errors with this family: (1) overclocking below 4.5V - the V grade is specified to 10MHz across the whole 1.8V-5.5V range, so do not extrapolate the 20MHz standard-grade curve; (2) forgetting to enable the bootloader section size fuses before attempting ISP programming of a bootloader, which wastes Flash and bricks the boot vector; (3) leaving RESET (pin 1) floating in noisy environments - add a 10k pull-up to VCC (debugWIRE users must remember the DWEN fuse must be cleared before the RESET pull-up behaves normally). Always verify lock-bit state before production shipping.
Compliance Information
Part is classified GREEN per Microchip/Atmel product listings, indicating RoHS compliance and lead-free/halogen-free package. REACH and conflict minerals status not stated in provided data.
