ATMEGA88-15AT - 8-bit AVR MCU 8KB Flash 16MHz TQFP-32 | Microchip
MPN: ATMEGA88-15AT β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.95 | $1.95 |
| 10 | $1.76 | $17.60 |
| 100 | $1.52 | $152.00 |
| 500 | $1.31 | $655.00 |
| 1,000 | $1.15 | $1,150.00 |
ATMEGA88-15AT Overview
An 8-bit microcontroller integrates a CPU core, program memory, data memory, timers, and peripherals on a single chip, sitting at the entry level of the embedded processing hierarchy (microcontroller -> embedded processor -> semiconductor IC). The ATmega88 belongs to the ATmega48/88/168 family, based on the AVR enhanced RISC architecture that executes powerful instructions in a single clock cycle, achieving throughput approaching 1 MIPS per MHz so system designers can optimize power consumption versus processing speed.
Key features include 130 powerful instructions with mostly single-cycle execution, 23 programmable I/O lines, two 8-bit timers and one 16-bit timer with PWM, a 6-channel 10-bit ADC, and connectivity via SPI, TWI (I2C), and USART interfaces. The 15 speed grade supports a 16MHz maximum clock, and the part is rated to 85 degrees C operation per distributor data.
The AVR core uses a Harvard architecture with separate program and data buses, plus in-system programmable (ISP) Flash via SPI, enabling firmware updates on the production line. Hardware-supported boot loading, internal RC oscillators, a power-on reset, a brown-out detector, and an on-chip debug capability via debugWIRE reduce external component count and bill-of-materials cost.
Typical applications include industrial automation control, consumer appliances, battery chargers, sensor nodes, and hobby/educational platforms such as Arduino-compatible designs, where low cost and robust peripheral integration matter more than raw processing power.
For design, note that the ATmega88 is pin compatible with the ATmega8 but not a firmware drop-in; porting guidance is given in Microchip application note AVR094, and the ATmega48/168 share the same footprint for memory-size scaling.
This page synthesizes distributor data, drop-in alternatives, and practical design notes beyond what the manufacturer datasheet provides.
Drop-in alternatives for ATMEGA88-15AT 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 ATMEGA88-15AT (same form factor and footprint) β differing in Package, Supply Voltage Range, Maximum Clock Frequency, Operating Temperature, ADC Resolution.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATMEGA88-15AD
β Drop-Inβ In Stock
$1.55 / Unit
View Datasheet βATMEGA88V-15AT
β Drop-Inπ Reference alternative (not in catalog)
ATMEGA48-15AT
β Drop-Inπ Reference alternative (not in catalog)
ATMEGA168-15AT
β Drop-Inβ In Stock
$1.58 / Unit
View Datasheet βATMEGA88PA-15AT
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMEGA88-15AT Maximum Ratings & Electrical Characteristics
| Core | AVR 8-bit RISC |
| Flash Program Memory | 8 KB (4K x 16) |
| SRAM | 1 KB |
| EEPROM | 512 B |
| Maximum Clock Frequency | 16 MHz |
| Supply Voltage Range | 4.5 V to 5.5 V |
| I/O Pins | 23 |
| Timers/Counters | 2 x 8-bit, 1 x 16-bit |
| ADC | 6-channel 10-bit |
| Communication Interfaces | SPI, TWI (I2C), USART |
| PWM Channels | 3 (hardware PWM via timers) |
| In-System Programming | Yes (ISP via SPI) |
| Operating Temperature | -40C to +85C |
| Package | 32-TQFP (7 x 7 mm, 0.8 mm pitch, 1.0 mm height) |
| Mounting Type | Surface Mount |
| Life Cycle Stage | Active |
| Instruction Set | 130 instructions, mostly single-cycle |
ATMEGA88-15AT Pin Configuration
| Pin 1 | PD3 β Port D bit 3 (digital I/O) |
| Pin 2 | PD4 β Port D bit 4 (digital I/O, XCK/T0) |
| Pin 3 | GND β Ground |
| Pin 4 | VCC β Digital supply voltage |
| Pin 5 | GND β Ground |
| Pin 6 | VCC β Digital supply voltage |
| Pin 7 | PB6 β Port B bit 6 / XTAL1 (crystal input) |
| Pin 8 | PB7 β Port B bit 7 / XTAL2 (crystal output) |
| Pin 9 | PD5 β Port D bit 5 (T1/OC0B) |
| Pin 10 | PD6 β Port D bit 6 (AIN0/OC0A) |
| Pin 11 | PD7 β Port D bit 7 (AIN1) |
| Pin 12 | PB0 β Port B bit 0 (ICP1/CLKO) |
| Pin 13 | PB1 β Port B bit 1 (OC1A) |
| Pin 14 | PB2 β Port B bit 2 (SS/OC1B) |
| Pin 15 | PB3 β Port B bit 3 (MOSI/OC2A) |
| Pin 16 | PB4 β Port B bit 4 (MISO) |
| Pin 17 | PB5 β Port B bit 5 (SCK) |
| Pin 18 | AVCC β ADC supply voltage |
| Pin 19 | ADC6 β ADC input channel 6 |
| Pin 20 | AREF β Analog reference voltage |
| Pin 21 | GND β Ground |
| Pin 22 | ADC7 β ADC input channel 7 |
| Pin 23 | PC0 β Port C bit 0 (ADC0/SCL) |
| Pin 24 | PC1 β Port C bit 1 (ADC1/SDA) |
| Pin 25 | PC2 β Port C bit 2 (ADC2) |
| Pin 26 | PC3 β Port C bit 3 (ADC3) |
| Pin 27 | PC4 β Port C bit 4 (ADC4/SDA) |
| Pin 28 | PC5 β Port C bit 5 (ADC5/SCL) |
| Pin 29 | PC6 β RESET (active-low reset / debugWIRE) |
| Pin 30 | PD0 β Port D bit 0 (RXD) |
| Pin 31 | PD1 β Port D bit 1 (TXD) |
| Pin 32 | PD2 β Port D bit 2 (INT0) |
Typical Applications
ATMEGA88-15AT is suitable for 6 applications: Industrial Automation Control, Consumer Appliances, Sensor and IoT Nodes, Motor Control and PWM Drives, Educational and Hobby Electronics, Battery Chargers and Power Management.
Industrial Automation Control
The ATMEGA88-15AT fits industrial control nodes thanks to its 23 programmable I/O lines, two 8-bit and one 16-bit timer with PWM outputs, and operation across -40C to +85C. According to supplier data, the AVR core delivers roughly 1 MIPS per MHz at 16MHz, enough for relay sequencing, motor start logic, and sensor polling loops. In a typical topology the MCU drives optocoupler-isolated outputs, reads switches through internal pull-ups, and reports status over USART or SPI to a PLC. Running from the industrial 5V rail eliminates a separate regulator, and the internal brown-out detector guards against brownout corruption in electrically noisy cabinets.
Recommended
Consumer Appliances
Home appliances such as coffee machines, fans, and small heaters need low-cost firmware control with PWM and ADC capability, which the ATMEGA88-15AT provides in a single 32-TQFP device. Its 6-channel 10-bit ADC reads temperature sensors and user potentiometers directly, while hardware PWM dims displays and drives triac-trigger circuits. The 8KB Flash accommodates full appliance state machines with menu logic, and 512B EEPROM stores user settings across power cycles. Because the AVR executes most instructions in one clock cycle, responsive user-interface timing is achieved even at modest clock rates, reducing EMI compared to faster competitors like PIC16 parts in the same cost class.
Recommended
Sensor and IoT Nodes
The ATMEGA88-15AT suits wired sensor nodes where its 6-channel 10-bit ADC digitizes analog sensors and the SPI or TWI (I2C) bus connects external EEPROMs, displays, or radio modules. With 1KB SRAM, it buffers small sensor datasets and runs communications stacks such as Modbus RTU over USART. The AVR's low-power sleep modes (idle, power-down) let battery-backed nodes duty-cycle between measurements, and the in-system programmable Flash allows field firmware updates through the SPI header. Designers should note the 4.5V-5.5V supply requirement; battery designs should select the ATMEGA88V variant for 3V operation without board redesign.
Recommended
Motor Control and PWM Drives
Small DC motor and BLDC fan control is a natural fit: the 16-bit Timer/Counter1 generates phase- and frequency-correct PWM, while the two 8-bit timers handle tachometer input capture and scheduling. The ATMEGA88-15AT's hardware PWM outputs drive H-bridge gate drivers or transistor pre-drivers, and the ADC monitors current shunts for overcurrent cutoff in software. The 16MHz clock provides sufficient loop bandwidth for hobby-class servo and fan-speed loops. Because the part integrates all timing and sensing on-chip, a complete closed-loop drive needs only a driver IC and power stage around the MCU, keeping cost and PCB area minimal for volume appliance and automotive-aftermarket products.
Recommended
Educational and Hobby Electronics
The ATmega88 is widely used in learning platforms and hobby kits because it shares the AVR architecture of classic Arduino boards while costing less. Its 130-instruction AVR RISC set is easy to learn in assembly or C, the debugWIRE on-chip debug capability requires only the reset line, and ISP programming needs just SPI plus reset. The 8KB Flash is large enough for bootloader-plus-tutorial projects, and the same TQFP-32 footprint as ATmega168/328 lets students scale up later without rewiring. University labs favor the part for teaching timers, interrupts, ADC, and serial protocols in one coherent, low-cost platform.
Recommended
Battery Chargers and Power Management
Smart charger designs exploit the ATMEGA88-15AT's combination of 10-bit ADC (for voltage and current telemetry), PWM (for buck-converter control), and EEPROM (for charge-profile storage). The MCU implements CC/CV charging curves, temperature cutoffs via NTC sensing on an ADC channel, and fault logging, replacing discrete comparator-based chargers with a programmable solution. Its 16MHz clock supports fast control-loop interrupt service, and the internal bandgap reference provides a stable ADC reference for millivolt-level battery sensing when AREF is configured appropriately. Designers must respect the 5V supply requirement and use the V variant where single-cell lithium or 3V systems are the power source.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA88-15AT β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA88-15AD | ATMEGA88V-15AT | ATMEGA48-15AT | ATMEGA168-15AT |
|---|---|---|---|---|---|
| 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 (Atmel) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 8 KB | 8 KB | 8 KB | 4 KB | 16 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 256 B | 1 KB |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 1.8 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Max Clock Frequency | 16 MHz | 16 MHz | 16 MHz (at 5V) | 16 MHz | 16 MHz |
| EEPROM | 512 B | 512 B | 512 B | 256 B | 512 B |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Qualification Level | Standard (industrial) | Automotive-grade variant | Standard (low-voltage) | Standard (industrial) | Standard (industrial) |
Key Differentiators
- Memory headroom within the family (vs ATMEGA48-15AT)
- Wider-voltage sibling available at no board cost (vs ATMEGA88V-15AT)
- Cost advantage over larger-memory variant (vs ATMEGA168-15AT)
Design Notes
The ATMEGA88-15AT has two VCC pins (4 and 6), two GND pins (3 and 5), and a separate AVCC (pin 18). Decouple each VCC pin with a 100nF ceramic capacitor placed within 5mm of the pin, and connect AVCC to VCC through a low-pass LC filter (10uH inductor plus 100nF) when ADC accuracy matters. Tie AREF (pin 20) to ground through a 100nF capacitor when using internal references; never connect a capacitor directly to VREF sources without checking the datasheet reference selection table.
This 15 speed-grade part is specified for 4.5V to 5.5V; running it from a 3.3V rail violates the datasheet range and can cause clock instability. If your rail is 3.3V or battery-powered, select the ATMEGA88V-15AT in the same TQFP-32 footprint instead. Also verify maximum clock versus VCC: the 16MHz rating applies near 5V; derating applies at lower VCC per the datasheet frequency-versus-voltage curve.
Migrating from ATmega8: per Microchip application note AVR094, the ATmega88 is pin compatible but not a firmware drop-in - interrupt vectors, timer registers, and fuse definitions differ, so recompile and re-verify. Additionally, PC6 (pin 29) is dedicated to RESET/debugWIRE; disabling the JTAG-free reset function via fuses locks out ISP programming if debugWIRE is not disabled before removing the debugger. Always keep a hardware ISP header on production boards for field recovery.
Compliance Information
Compliance status for this specific ordering code was not stated in the provided web data; verify via the Microchip product page material declaration. The -15AD variant is marketed as automotive per FindIC data.
