ATMEGA48V-10PJ - 4KB Flash 10MHz AVR MCU 28-DIP | Microchip
MPN: ATMEGA48V-10PJ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.9 | $2.90 |
| 10 | $2.61 | $26.10 |
| 100 | $2.32 | $232.00 |
| 500 | $2.07 | $1,035.00 |
| 1,000 | $1.85 | $1,850.00 |
ATMEGA48V-10PJ Overview
An 8-bit AVR microcontroller is a reduced-instruction-set (RISC) MCU that executes most of its 131 powerful instructions in a single clock cycle. Within the power management and embedded hierarchy, the ATmega family sits in the low-power general-purpose MCU class, descended from the original AVR architecture now manufactured by Microchip Technology after its acquisition of Atmel.
Key features include an advanced RISC architecture with 32 general-purpose 8-bit working registers, an 8-channel 10-bit ADC, three timers (two 8-bit, one 16-bit), and I2C, SPI, and UART/USART serial interfaces. The device supports In-System Programmable (ISP) Flash and DebugWire on-chip debugging over a single wire.
Technically, the ATMEGA48V-10PJ combines self-programming Flash with a Harvard-architecture pipeline, delivering deterministic single-cycle execution that simplifies real-time firmware timing analysis. Its low-voltage rating (1.8 V minimum) extends battery life in coin-cell and alkaline-powered products where 5 V-only parts cannot operate.
Typical applications include battery-powered sensors, hobby and educational breadboard projects benefiting from the through-hole DIP-28 footprint, small appliance control boards, and low-cost industrial monitoring nodes using the UART for telemetry.
For design, remember the 10 MHz speed grade applies across the 1.8-5.5 V range, but verify Brown-out Detector (BOD) settings when operating below 2.7 V, and note the DIP-28 footprint supports zero-insertion-force sockets for rapid prototyping.
This page synthesizes distributor pricing, drop-in family alternatives, complete pinout data, and practical design notes not found in a single manufacturer datasheet.
Drop-in alternatives for ATMEGA48V-10PJ — 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-10PJ (same form factor and footprint) — differing in Timers, EEPROM, SRAM, ADC Resolution, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATMEGA48V-10PI
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
ATMEGA48PA-PU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.05 / Unit
View Datasheet →ATMEGA48A-PU
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
ATMEGA48-20PI
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.98 / Unit
View Datasheet →ATMEGA48V-10PJ Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit AVR RISC |
| Maximum Clock Frequency | 10 MHz |
| Flash Program Memory | 4 KB (2K x 16) |
| SRAM | 512 B |
| EEPROM | 256 B |
| Operating Voltage Range | 1.8 V to 5.5 V |
| ADC Resolution | 10-bit |
| ADC Channels | 8 |
| Timers | 2 x 8-bit, 1 x 16-bit |
| Communication Interfaces | I2C, SPI, UART/USART |
| Throughput | Up to 10 MIPS at 10 MHz |
| Package | 28-PDIP (0.300 in, 7.62 mm) |
| Mounting Type | Through Hole |
| On-Chip Debug | DebugWire |
| In-System Programming | Yes (ISP Flash) |
| RoHS Status | Compliant (P = lead-free DIP suffix) |
ATMEGA48V-10PJ 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 — Port D bit 4, Timer0 external clock input |
| Pin 7 | VCC — Digital supply voltage (1.8 V to 5.5 V) |
| Pin 8 | GND — Ground |
| Pin 9 | PB6 / XTAL1 / TOSC1 — Port B bit 6, crystal oscillator input or Timer oscillator input |
| Pin 10 | PB7 / XTAL2 / TOSC2 — Port B bit 7, crystal oscillator output or Timer oscillator output |
| Pin 11 | PD5 / T1 / OC0B — Port D bit 5, Timer1 clock input or Timer0 output compare B |
| Pin 12 | PD6 / AIN0 / OC0A — Port D bit 6, analog comparator positive input or 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 or 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 or Timer1 output compare B (PWM) |
| Pin 17 | PB3 / MOSI / OC2A — Port B bit 3, SPI master output or 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 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 or I2C data |
| Pin 28 | PC5 / ADC5 / SCL — Port C bit 5, ADC channel 5 or I2C clock |
Typical Applications
ATMEGA48V-10PJ is suitable for 6 applications: Battery-Powered Sensor Nodes, Educational and Hobby Prototyping, Small Appliance Control, Industrial Monitoring and Telemetry, Low-Voltage Portable Instruments, Motor and LED Control (Hobby Robotics).
Battery-Powered Sensor Nodes
The ATMEGA48V-10PJ fits battery-powered sensor nodes because its 1.8V-5.5V supply range tracks a discharging battery directly without a boost converter, and its 8-channel 10-bit ADC digitizes multiple analog sensors (temperature, light, humidity) on-chip. Firmware typically clocks the core at 1 MHz from the internal 8 MHz RC oscillator, then sleeps in Power-down mode between samples, waking via Watchdog timeout or external interrupt. Because the ADC reference can be tied to a 1.1V internal bandgap, ratiometric measurement stays accurate as VCC sags. The trade-off versus a modern picoPower part (ATMEGA48PA) is higher sleep current, so for ultra-long coin-cell life the PA variant is preferable; the V-10 grade remains cost-effective for replaceable-battery designs.
Recommended
Educational and Hobby Prototyping
The 0.300-inch 28-PDIP package is the primary reason this part thrives in education and hobby electronics: it plugs directly into standard solderless breadboards and ZIF sockets, can be removed and reprogrammed hundreds of times, and costs only a few dollars. The ATMEGA48V-10PJ implements the classic AVR architecture taught in university embedded-lab courses - 131 mostly single-cycle instructions, 32 working registers, and straightforward ISP programming via SPI from an Arduino-as-ISP or USBasp. Its 1.8V floor lets students experiment with low-voltage logic safely at 3V coin-cell levels. Because Flash is 4KB, projects stay small enough to read in full, which is pedagogically valuable. For capstone projects needing USB or more memory, students can migrate to pin-compatible ATMEGA328P-PU boards without changing wiring.
Recommended
Small Appliance Control
Cost-sensitive appliance control boards (kettles, fans, small pumps) use the ATMEGA48V-10PJ for its deterministic 8-bit core, three timers including a 16-bit timer with input capture and PWM outputs, and robust Flash endurance for field updates via self-programming. The 10 MHz speed grade is sufficient for keypad scanning, triac phase control, and relay timing, while the internal RC oscillator removes the cost of an external crystal in non-precision timing tasks. Operating at 5V from the appliance's transformer supply gives high-noise-margin I/O for driving optotriac gate circuits. The through-hole DIP-28 also suits low-volume hand-assembly in regional manufacturing. Designers should fit the Brown-out Detector to prevent EEPROM corruption during mains brownouts.
Recommended
Industrial Monitoring and Telemetry
In industrial telemetry nodes, the ATMEGA48V-10PJ acts as an acquisition front end: its 10-bit ADC samples 4-20 mA-derived voltages or potentiometer positions, and the hardware UART streams Modbus-RTU frames over RS-485 transceivers. The I2C master connects EEPROMs or RTC chips for data logging, and the SPI port drives segment LCD controllers. With the PJ industrial-grade temperature option and 5V supply, noise immunity meets typical panel environments; Watchdog timer and BOD provide fail-safe recovery after power glitches common in factory floors. The 4KB Flash is adequate for compact Modbus slaves but not for TLS or complex protocol stacks - designs needing richer networking should move up the family to ATMEGA328 or 32-bit AVR/ARM parts while retaining similar peripheral structures.
Recommended
Low-Voltage Portable Instruments
Portable instruments running from two AA/AAA cells (nominally 3V, down to 1.8V at end of discharge) exploit the V suffix's guaranteed 1.8V operation - a specification standard ATmega48 grades cannot meet. In such designs the ATMEGA48V-10PJ reads battery voltage via the internal 1.1V reference for fuel-gauging, drives an LCD via SPI, and uses Pin Change Interrupts on Port D for button wake-up. Operating below 2V halves logic energy per switching event compared to 3.3V operation, directly extending runtime. Designers must observe the reduced maximum clock at very low VCC in some family documents and validate ADC accuracy at end-of-life voltage. For new ultra-low-power designs, compare against the ATMEGA48PA-PU's picoPower sleep figures before freezing the BOM.
Recommended
Motor and LED Control (Hobby Robotics)
Hobby robotics controllers use the ATMEGA48V-10PJ's 16-bit Timer1 PWM outputs (OC1A/OC1B on PB1/PB2) to drive H-bridge inputs for DC motor speed control, while Timer0 handles encoder counting via the ICP1 input-capture pin for odometry. The 8-bit Timer2 with OC2A provides a second PWM channel or a speaker tone output. At 5V, port pins source/sink up to 20 mA each, enough for direct LED indicators and small transistor base drives without buffering. The 10 MHz core executes PID loops on two channels at kilohertz rates, sufficient for line-follower and small rover platforms. Pin compatibility with ATMEGA328P-PU lets the same PCB scale to robots needing more Flash for navigation code.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA48V-10PJ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA48V-10PI | ATMEGA48PA-PU | ATMEGA48A-PU | ATMEGA48-20PI |
|---|---|---|---|---|---|
| Package | 28-PDIP (0.300 in, 7.62 mm) | 28-PDIP (0.300 in) - same | 28-PDIP (0.300 in) - same | 28-PDIP (0.300 in) - same | 28-PDIP (0.300 in) - same |
| Brand | Microchip Technology (Atmel) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Clock Frequency | 10 MHz | 10 MHz | 20 MHz | 20 MHz | 20 MHz |
| Operating Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 4.5 V to 5.5 V (at 20 MHz) | 2.7 V to 5.5 V |
| Flash Memory | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB |
| SRAM / EEPROM | 512 B / 256 B | 512 B / 256 B | 512 B / 256 B | 512 B / 256 B | 512 B / 256 B |
| Low-Power Features | Standard sleep modes | Standard sleep modes | picoPower (uA-class sleep) | Standard sleep modes | Standard sleep modes |
| Temperature Grade | Extended / commercial (PJ suffix) | Industrial (-40C to +85C) | Commercial (PU suffix) | Commercial (PU suffix) | Industrial (-40C to +85C) |
| Silicon Generation | Legacy V-grade | Legacy V-grade | picoPower (newest ATmega48 silicon) | A-grade refresh | Original |
Key Differentiators
- Guaranteed 1.8 V operation at full 10 MHz (vs ATMEGA48A-PU)
- Lower speed grade reduces cost and EMI (vs ATMEGA48PA-PU)
- Through-hole DIP-28 prototyping convenience (vs ATMEGA48V-10MMU)
- Longest-established silicon with mature errata (vs ATMEGA48-20PI)
Design Notes
Connect AVCC (pin 20) to VCC through a low-pass filter (typically 10 uH inductor and 0.1 uF capacitor) even if the ADC is unused - the datasheet requires AVCC within 0.3 V of VCC and not left floating. Enable the Brown-out Detector via fuse when operating near 1.8 V end-of-battery discharge; a reset occurring during EEPROM write corrupts data, and the BOD level should be selected at least 0.2 V above the minimum guaranteed operating voltage for your clock configuration.
On a DIP-28 through-hole board, decouple VCC (pin 7) and AVCC (pin 20) with 0.1 uF ceramic capacitors placed within a few millimeters of each pin, plus one bulk 4.7-10 uF per board. Keep the AREF pin (21) clean: place a 100 nF capacitor to GND when using the internal 1.1 V reference, and never drive AREF while the internal reference is selected. Route the XTAL1/XTAL2 crystal (pins 9-10) with short traces and guard with ground if an external crystal is used above 8 MHz.
Three frequent mistakes with this part: (1) locking debugSWEN by accident - enabling DebugWire fuse with only an ISP programmer present bricks access until a DebugWire-capable tool (Atmel-ICE) is used; (2) assuming 20 MHz - the V-10 grade is limited to 10 MHz across the full voltage range, so writing speed-20 fuses causes marginal timing; (3) forgetting that PC6 (pin 1) defaults to RESET - using it as GPIO requires clearing the RSTDISBL fuse, which permanently disables further high-voltage reprogramming. Verify fuse settings against the Microchip datasheet before programming.
Estimated: at 5 V, 10 MHz, and 20 mA total I/O source current, typical active-mode supply current for this device class is roughly 5-12 mA, giving about 60 mW dissipation. With a PDIP theta_JA on the order of 80-100 C/W (estimated), junction rise is under 6 C above ambient - no heatsinking is ever required for this MCU. Thermal design effort should focus instead on surrounding power components (regulators, drivers), not the ATMEGA48V-10PJ itself.
Compliance Information
The PJ suffix on Microchip DIP parts denotes lead-free (RoHS-compliant) plating. REACH, halogen-free, and conflict-minerals status not stated in the retrieved web data.
