ATMEGA48-15AZV - 8-Bit AVR MCU, 4KB Flash, 32-TQFP | Microchip
MPN: ATMEGA48-15AZV ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.54 | $1.54 |
| 10 | $1.42 | $14.20 |
| 100 | $1.28 | $128.00 |
| 500 | $1.15 | $575.00 |
| 1,000 | $1.02 | $1,020.00 |
ATMEGA48-15AZV Overview
An 8-bit AVR microcontroller is a Harvard-architecture processor that executes most instructions in a single clock cycle, sitting at the entry level of the AVR ATmega family hierarchy below the ATmega88, ATmega168, and ATmega328. Microcontrollers of this class combine CPU, flash program memory, SRAM data memory, and peripheral functions such as timers, USART, SPI, I2C (TWI), and a 10-bit ADC on a single chip, making them the control backbone of embedded systems.
Key features include throughput up to 16 MIPS at 16 MHz, two 8-bit timers and one 16-bit timer with PWM output, a 10-bit ADC with 6 multiplexed channels and internal bandgap reference, byte-oriented TWI (I2C) and full-duplex USART serial interfaces, and an SPI port supporting In-Circuit Serial Programming (ICSP). The picoPower-style sleep modes and brown-out detector support robust operation in electrically noisy automotive environments.
The ATmega48 core implements 131 powerful instructions, with 32 general-purpose 8-bit registers directly connected to the ALU, enabling C-compiler-friendly code density. Hardware debug support is available through debugWIRE via the reset line, and programming uses the low-cost MPLAB SNAP or AVR ISP tools.
Typical applications include automotive body and comfort electronics, sensor nodes, motor and LED control, industrial automation, and consumer appliance control boards where 4KB of flash is sufficient and extended temperature range is required.
Design consideration: the 4KB flash has no bootloader-friendly split by default, so plan for external programming access; the -15AZ grade is qualified for automotive temperature ranges but verify AEC-Q100 status for your specific quality-flow requirement.
This page synthesizes distributor pricing, drop-in same-family alternatives, pinout data, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for ATMEGA48-15AZV — 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 ATMEGA48-15AZV (same form factor and footprint) — differing in Operating Temperature, EEPROM, Instruction Set, SRAM, Maximum Clock Frequency.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATMEGA48A-AUR
✅ Drop-In📋 Reference alternative (not in catalog)
ATMEGA48PA-AUR
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.72 / Unit
View Datasheet →ATMEGA88-15AZ
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
ATMEGA88PA-AUR
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.82 / Unit
View Datasheet →ATMEGA168-15AZ
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.18 / Unit
View Datasheet →ATMEGA328P-15AZ
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$4.02 / Unit
View Datasheet →ATMEGA48-15AZV Maximum Ratings & Electrical Characteristics
| Core Processor | AVR 8-bit RISC |
| Program Memory Size | 4KB (2K x 16) Flash |
| RAM Size | 512 x 8 B |
| EEPROM Size | 256 x 8 B |
| Core Speed | 16 MHz (15 MHz per Mouser listing) |
| Number of I/O | 23 |
| ADC Resolution | 10-bit |
| Package / Case | 32-TQFP (7x7 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +125C |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| Connectivity | SPI, UART/USART, TWI (I2C) |
| Timers | Two 8-bit, one 16-bit |
| Programming Interface | ICSP (SPI), debugWIRE |
| Instruction Set | 131 AVR instructions, mostly single-cycle |
| Series | AVR ATmega, Automotive grade |
ATMEGA48-15AZV Pin Configuration
| Pin 1 | PD3 (INT1/OC2B/PCINT19) — Port D bit 3, external interrupt 1, Timer2 PWM output B |
| Pin 2 | PD4 (T1/XCK/PCINT20) — Port D bit 4, Timer1 external clock, USART external clock |
| Pin 3 | GND — Ground |
| Pin 4 | VCC — Digital supply voltage |
| Pin 5 | GND — Ground |
| Pin 6 | VCC — Digital supply voltage |
| Pin 7 | PB6 (XTAL1/TOSC1/PCINT6) — Port B bit 6, crystal oscillator input / timer oscillator |
| Pin 8 | PB7 (XTAL2/TOSC2/PCINT7) — Port B bit 7, crystal oscillator output |
| Pin 9 | PD5 (T0/OC0B/PCINT21) — Port D bit 5, Timer0 external clock, Timer0 PWM output B |
| Pin 10 | PD6 (OC0A/AIN0/PCINT22) — Port D bit 6, Timer0 PWM output A, analog comparator input 0 |
| Pin 11 | PD7 (AIN1/PCINT23) — Port D bit 7, analog comparator input 1 |
| Pin 12 | PB0 (ICP1/CLKO/PCINT0) — Port B bit 0, Timer1 input capture, clock output |
| Pin 13 | PB1 (OC1A/PCINT1) — Port B bit 1, Timer1 PWM output A |
| Pin 14 | PB2 (SS/OC1B/PCINT2) — Port B bit 2, SPI slave select, Timer1 PWM output B |
| Pin 15 | PB3 (MOSI/OC2A/PCINT3) — Port B bit 3, SPI master out, Timer2 PWM output A |
| Pin 16 | PB4 (MISO/PCINT4) — Port B bit 4, SPI master in |
| Pin 17 | PB5 (SCK/PCINT5) — Port B bit 5, SPI clock |
| Pin 18 | AVCC — ADC supply voltage |
| Pin 19 | ADC6 — ADC input channel 6 |
| Pin 20 | AREF — Analog reference voltage |
| Pin 21 | GND — Ground |
| Pin 22 | ADC7 — ADC input channel 7 |
| Pin 23 | PC0 (ADC8/PCINT8) — Port C bit 0, ADC channel 8 |
| Pin 24 | PC1 (ADC9/PCINT9) — Port C bit 1, ADC channel 9 |
| Pin 25 | PC2 (ADC10/PCINT10) — Port C bit 2, ADC channel 10 |
| Pin 26 | PC3 (ADC11/PCINT11) — Port C bit 3, ADC channel 11 |
| Pin 27 | PC4 (ADC12/SDA/PCINT12) — Port C bit 4, ADC channel 12, TWI data |
| Pin 28 | PC5 (ADC13/SCL/PCINT13) — Port C bit 5, ADC channel 13, TWI clock |
| Pin 29 | PC6 (RESET/PCINT14) — Reset input (active low), debugWIRE interface |
| Pin 30 | PD0 (RXD/PCINT16) — Port D bit 0, USART receive |
| Pin 31 | PD1 (TXD/PCINT17) — Port D bit 1, USART transmit |
| Pin 32 | PD2 (INT0/PCINT18) — Port D bit 2, external interrupt 0 |
Typical Applications
ATMEGA48-15AZV is suitable for 6 applications: Automotive Body and Comfort Electronics, Sensor Nodes and Data Acquisition, Motor Control and PWM Actuation, LED Lighting and Dimming Control, Industrial Automation and Control Panels, Consumer Appliance Control Boards.
Automotive Body and Comfort Electronics
The ATMEGA48-15AZV fits automotive body and comfort modules such as seat controllers, window lifters, light switches, and climate flap actuators because it combines the -40C to +125C automotive temperature grade with a brown-out detector, power-on reset, and watchdog timer for fault-safe operation in electrically noisy vehicle environments. Its 4KB flash is sufficient for state-machine and LIN-style protocol code that dominates these applications. In a typical module the ATMEGA48 reads switches or hall sensors through its 10-bit ADC (6 channels, internal bandgap reference), drives loads via PWM timers, and communicates over the TWI or USART interface to a gateway ECU. Because the AVR core executes most instructions in a single cycle, deterministic timing for relay sequencing and PWM dimming is easy to achieve without RTOS overhead. Designers should enable the watchdog and brown-out fuses to guarantee safe recovery during crank-induced voltage dips.
Recommended
Sensor Nodes and Data Acquisition
The ATMEGA48-15AZV is well suited to sensor acquisition nodes because its 10-bit ADC with six multiplexed channels, internal 1.1V bandgap reference, and input range selection allow direct connection of thermistors, potentiometers, and pressure bridges without external front-end ICs. The 4KB flash comfortably holds sampling loops, digital filtering, and a TWI or USART transmission protocol, while 512B SRAM provides buffering for burst-captured readings. In a typical node, the microcontroller sleeps in power-down with the watchdog waking it at fixed intervals, converts one ADC channel, and pushes data over USART to a radio or wired link - a pattern that keeps average current in the microamp range. The -15AZ extended temperature grade also allows deployment in industrial enclosures and under-dash automotive positions where 0C-70C commercial parts would fail.
Recommended
Motor Control and PWM Actuation
The ATMEGA48-15AZV drives small DC motors, fans, and actuators using its two 8-bit timers and one 16-bit timer, which provide multiple hardware PWM channels with configurable phase-correct and fast-PWM modes. Hardware PWM eliminates software timing jitter, enabling stable fan speed control and servo positioning even while the CPU handles ADC sampling and communication. The 23 I/O lines and single-cycle core let a single ATMEGA48 implement closed-loop speed regulation: the ADC samples a tachometer or back-EMF signal, the firmware updates the PWM compare register, and the TWI interface reports status to a host. The extended -40C to +125C range suits fan controllers in automotive HVAC and industrial power supplies. Gate-drive outputs should be buffered with a MOSFET driver since the AVR I/O pins are limited to around 20 mA source/sink per pin per the datasheet absolute maximums.
Recommended
LED Lighting and Dimming Control
The ATMEGA48-15AZV is a cost-effective controller for LED drivers and dimming systems because its hardware PWM outputs generate glitch-free brightness control at frequencies above perceptible flicker thresholds, while the 4KB flash holds color-mixing curves, temperature compensation tables, and communication protocols. The internal ADC can monitor LED string current via a shunt resistor or sense junction temperature via an NTC on one of the six analog channels, enabling thermal foldback that extends LED lifetime. In a typical driver board, the ATMEGA48 outputs PWM to a MOSFET or LED-driver IC enable pin, reads the NTC sensor, and receives dimming commands over TWI or USART. The automotive temperature grade makes it appropriate for headlamp, taillight, and interior ambient lighting modules exposed to wide ambient swings.
Recommended
Industrial Automation and Control Panels
In industrial automation, the ATMEGA48-15AZV serves as a compact logic controller for panel boards, relay sequencing, and small machine control where 4KB of flash suffices for ladder-style logic implemented in C. Its TWI interface connects to I/O expanders, EEPROMs, and displays, while the USART links to RS-485 transceivers for Modbus-style fieldbus nodes. The brown-out detector and watchdog timer provide the fault recovery behavior expected in equipment that must run unattended, and the -40C to +125C range covers unconditioned control cabinets. The 10-bit ADC reads potentiometers, current shunts, and position feedback, and hardware PWM drives heaters or actuators. Because the AVR instruction set is fully supported by the free AVR-GCC/XC8 toolchain, firmware can be maintained for decades - an important consideration for long-lifecycle industrial equipment.
Recommended
Consumer Appliance Control Boards
The ATMEGA48-15AZV is widely used in appliance control boards - coffee machines, fan heaters, small pumps, and chargers - where a low-cost 8-bit MCU with integrated ADC, PWM, and UART replaces discrete logic. The 4KB flash is enough for button debouncing, state machines, display multiplexing, and safety cutoff routines; 512B SRAM handles UI buffers. Hardware PWM gives smooth heater and motor power control, and the 10-bit ADC reads thermistors for temperature regulation and over-temperature protection. Using the automotive-grade -15AZ variant in consumer designs provides margin against harsh internal enclosure temperatures near heating elements, beyond what commercial-grade parts guarantee. ICSP programming pads on the production PCB allow field firmware updates with simple in-circuit programmers, and debugWIRE permits source-level debugging through the same reset pin without extra header pins.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA48-15AZV — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA48A-AUR | ATMEGA48PA-AUR | ATMEGA88-15AZ | ATMEGA328P-15AZ |
|---|---|---|---|---|---|
| Package | 32-TQFP (7x7 mm) | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 4KB (2K x 16) | 4KB | 4KB | 8KB | 32KB |
| SRAM | 512 B | 512 B | 512 B | 1 KB | 2 KB |
| EEPROM | 256 B | 256 B | 256 B | 512 B | 1 KB |
| Max Core Speed | 16 MHz (15 MHz per Mouser listing) | 20 MHz | 20 MHz | 16 MHz | 20 MHz |
| Core / Low-Power Feature | Original ATmega48 core | ATmega48A core | picoPower core | Original ATmega88 core | picoPower Pico core |
Key Differentiators
- Automotive extended temperature grade at entry-level cost (vs ATMEGA48A-AUR)
- Minimal cost with no unused memory paid for (vs ATMEGA328P-15AZ)
- Same footprint allows zero-PCB-change memory upgrades (vs ATMEGA88-15AZ)
Design Notes
Decouple VCC (pins 4 and 6) and AVCC (pin 18) each with a 100 nF ceramic capacitor placed within 5 mm of the pin, plus one 4.7-10 uF bulk capacitor per supply rail. AVCC must be connected to VCC even if the ADC is unused, per the ATmega48 datasheet power section, or analog peripherals and reset behavior become unreliable. If ADC noise is critical, filter AVCC through an LC network (10 uH + 10 uF) rather than tying it directly to the digital rail.
Fuses configure the clock source and reset behavior; setting SPIEN incorrectly or disabling debugWIRE while using it through the RESET pin can lock the device, requiring a 12V parallel high-voltage programmer to recover. Enable the brown-out detector (BOD) fuse in automotive applications because crank transients can cause silent SRAM corruption. Also note that PB6/PB7 default to the crystal function - if using them as GPIO, clear the CKOUT/clock-select fuses first.
For the 32-TQFP 0.8 mm pitch footprint, fan out with via-in-pad or dogbone escapes; keep the crystal (PB6/PB7) traces under 10 mm and surround with a ground guard ring. Route the RESET (pin 29) trace away from PWM and switching nodes since it doubles as the debugWIRE interface. Provide ICSP pads (MOSI/MISO/SCK/RESET/VCC/GND) on production boards for field programming.
Estimated: at 5 V, 16 MHz, and ~10 mA typical active current (ATmega48 family order of magnitude), power dissipation is roughly 50 mW, giving a negligible junction rise in the 32-TQFP package (theta_JA on the order of 100 C/W implies <5 C rise). Thermal design is not a limiting factor for this MCU; verify actual ICC from the datasheet current-versus-frequency curves for your voltage and clock configuration.
Compliance Information
Distributor data captured 2026-09-18 does not explicitly state RoHS/REACH/lead-free status for the -15AZ automotive suffix. Verify against the Microchip product page certificate of conformance; automotive flows are typically lead-free but this must be confirmed, not assumed.
