ATMEGA88-15AD - 8KB Flash AVR MCU 16MHz 5V | Atmel/Microchip
MPN: ATMEGA88-15AD ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.35 | $2.35 |
| 10 | $2.15 | $21.50 |
| 100 | $1.95 | $195.00 |
| 500 | $1.75 | $875.00 |
| 1,000 | $1.55 | $1,550.00 |
ATMEGA88-15AD Overview
An 8-bit AVR microcontroller is a single-chip computer built on the AVR enhanced RISC architecture, in which most instructions execute in a single clock cycle. Within the power-management hierarchy it integrates the CPU, program memory, data memory, timers, and peripherals on one die, delivering throughput approaching 1 MIPS per MHz and letting system designers optimize power consumption versus processing speed.
Key features include 130 powerful instructions with mostly single-cycle execution, 32 general purpose working registers, three flexible timer/counters with compare modes and PWM, a 6-channel 10-bit ADC, a programmable serial USART, an SPI serial interface, a two-wire (I2C-compatible) interface, and an on-chip debug capability via debugWIRE.
The advanced RISC pipeline combined with Harvard architecture memory bus separates instruction and data paths, so the 8KB flash programs while the core fetches the next instruction - a major reason the AVR family achieves near 1 MIPS per MHz efficiency. In-system programmability via the SPI port or bootloader allows firmware updates after board assembly.
Typical applications include industrial control and automation nodes, motor and LED control with PWM timers, and embedded systems requiring serial communication over USART, SPI, or I2C. Its 5V supply suits legacy 5V industrial buses and robust noise-margin designs.
Design consideration: the 4.5V to 5.5V operating range means this device is not suitable for 3.3V-only systems - select a 20 MHz-capable or V-series variant for wider voltage rails.
This page synthesizes distributor pricing, verified drop-in alternatives, pinout data, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for ATMEGA88-15AD — 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 ATMEGA88-15AD (same form factor and footprint) — differing in Package, Instruction Set, Serial Interfaces, Supply Voltage Range, ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATMEGA88A-AU
✅ Drop-In✓ In Stock
$1.52 / Unit
View Datasheet →ATMEGA88PV-10AU
✅ Drop-In✓ In Stock
$4.15 / Unit
View Datasheet →ATMEGA168-15AD
✅ Drop-In✓ In Stock
$3.15 / Unit
View Datasheet →ATMEGA48V-10AI
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.38 / Unit
View Datasheet →ATMEGA168PA-AU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.98 / Unit
View Datasheet →ATMEGA88-15AD Maximum Ratings & Electrical Characteristics
| Core Architecture | AVR 8-bit RISC |
| Flash Memory | 8 KB (ISP, read-while-write) |
| EEPROM | 512 B |
| SRAM | 1 KB |
| Maximum Clock Speed | 16 MHz |
| Supply Voltage Range | 4.5 V to 5.5 V |
| General Purpose I/O | 23 lines |
| Working Registers | 32 x 8-bit |
| Instructions | 130 (most single-cycle) |
| Timers/Counters | Three flexible timer/counters |
| Package Type | TQFP, 7 x 7 mm, 1.0 mm height, 0.8 mm pitch |
| Mounting Type | Surface Mount |
| Throughput | Up to 1 MIPS per MHz |
| ADC | 6-channel 10-bit |
| Serial Interfaces | USART, SPI, Two-Wire (I2C-compatible) |
| Life Cycle Stage | ACTIVE (newer device ATMEGA88A available) |
| Debug Interface | debugWIRE on-chip debug |
ATMEGA88-15AD Pin Configuration
| Pin 1 | PD3 (INT1) — Port D bit 3 / External interrupt 1 |
| Pin 2 | PD4 (XCK/T0) — Port D bit 4 / USART external clock / Timer0 clock input |
| Pin 3 | GND — Ground |
| Pin 4 | VCC — Digital supply voltage (4.5V to 5.5V) |
| Pin 5 | GND — Ground |
| Pin 6 | VCC — Digital supply voltage |
| Pin 7 | PB6 (XTAL1/TOSC1) — Port B bit 6 / Crystal oscillator pin 1 / Timer oscillator input |
| Pin 8 | PB7 (XTAL2/TOSC2) — Port B bit 7 / Crystal oscillator pin 2 / Timer oscillator output |
| Pin 9 | PD5 (T1) — Port D bit 5 / Timer1 external counter input |
| Pin 10 | PD6 (AIN0) — Port D bit 6 / Analog comparator positive input |
| Pin 11 | PD7 (AIN1) — Port D bit 7 / Analog comparator negative input |
| Pin 12 | PB0 (ICP1/CLKO) — Port B bit 0 / Timer1 input capture / Clock output |
| Pin 13 | PB1 (OC1A) — Port B bit 1 / Timer1 output compare A (PWM) |
| Pin 14 | PB2 (SS/OC1B) — Port B bit 2 / SPI slave select / Timer1 output compare B (PWM) |
| Pin 15 | PB3 (MOSI/OC2A) — Port B bit 3 / SPI master output / Timer2 output compare A (PWM) |
| Pin 16 | PB4 (MISO) — Port B bit 4 / SPI master input |
| Pin 17 | PB5 (SCK) — Port B bit 5 / SPI serial clock |
| Pin 18 | AVCC — ADC supply voltage (connect to VCC via low-pass filter) |
| Pin 19 | ADC6 — ADC input channel 6 (TQFP package only) |
| Pin 20 | AREF — ADC analog reference voltage |
| Pin 21 | GND — Ground |
| Pin 22 | ADC7 — ADC input channel 7 (TQFP package only) |
| Pin 23 | PC0 (ADC8) — Port C bit 0 / ADC channel 8 |
| Pin 24 | PC1 (ADC9) — Port C bit 1 / ADC channel 9 |
| Pin 25 | PC2 (ADC10) — Port C bit 2 / ADC channel 10 |
| Pin 26 | PC3 (ADC11) — Port C bit 3 / ADC channel 11 |
| Pin 27 | PC4 (SDA/ADC12) — Port C bit 4 / Two-wire data line / ADC channel 12 |
| Pin 28 | PC5 (SCL/ADC13) — Port C bit 5 / Two-wire clock line / ADC channel 13 |
| Pin 29 | PC6 (RESET) — Reset input (active low) / Port C bit 6 |
| Pin 30 | PD0 (RXD) — Port D bit 0 / USART receive input |
| Pin 31 | PD1 (TXD) — Port D bit 1 / USART transmit output |
| Pin 32 | PD2 (INT0) — Port D bit 2 / External interrupt 0 |
Typical Applications
ATMEGA88-15AD is suitable for 6 applications: Industrial Control and Automation, Motor and LED Control with PWM, Serial Communication Nodes (USART/SPI/I2C), Sensor Acquisition and Data Logging, Embedded Consumer and Appliance Control, Legacy 5V System Maintenance and Repair.
Industrial Control and Automation
The ATMEGA88-15AD fits industrial control nodes because its 4.5V to 5.5V supply matches legacy 5V industrial logic levels, delivering high noise margin in electrically harsh factory environments. Its three flexible timer/counters generate PWM for actuator drive while the 6-channel 10-bit ADC digitizes sensor inputs such as potentiometers, pressure, and temperature signals. With throughput near 1 MIPS per MHz, the 16 MHz part provides roughly 16 MIPS - ample for deterministic loop control. In-system programmability via SPI allows field firmware updates on mounted boards, reducing maintenance downtime in distributed automation installations.
Recommended
Motor and LED Control with PWM
PWM-centric control benefits directly from the ATMEGA88-15AD's three timer/counters, which support compare-match and phase-correct PWM modes suitable for DC motor speed control and multi-channel LED dimming. The 10-bit ADC reads current-sense shunts or feedback potentiometers to close control loops in firmware, while 23 GPIO lines drive gate drivers or MOSFET pre-drivers. Operating at 16 MHz from a robust 5V rail keeps interrupt latency low and PWM resolution high. The 512B EEPROM stores calibration constants such as speed tables that must survive power cycles without external memory.
Recommended
Serial Communication Nodes (USART/SPI/I2C)
As a communication gateway or protocol converter, the ATMEGA88-15AD offers a full-duplex USART for RS-485/RS-232 links, hardware SPI for high-speed peripheral expansion, and an I2C-compatible two-wire interface for sensors and EEPROMs - all on one 32-pin TQFP. The 8KB ISP flash with read-while-write supports bootloader-based firmware updates over the serial link, a common requirement for remotely deployed nodes. At 16 MHz the USART supports high baud rates with low CPU overhead. The 5V I/O directly drives industrial RS-485 transceivers without level shifting, simplifying the bill of materials.
Recommended
Sensor Acquisition and Data Logging
The 6-channel 10-bit ADC of the ATMEGA88-15AD enables multi-sensor acquisition with differential and single-ended modes, while the 1KB SRAM buffers sample blocks and the 512B EEPROM persists calibration and event counters. The analog supply pin (AVCC, pin 18) and dedicated AREF pin allow clean analog grounding schemes that improve effective ADC resolution in noisy environments. Timer-driven ADC triggering produces uniform sampling intervals for FFT-based vibration or power monitoring. Given ~16 MIPS throughput at 16 MHz, the part handles filtering and scaling math in integer arithmetic without external coprocessing.
Recommended
Embedded Consumer and Appliance Control
Consumer appliance boards - coffee machines, small HVAC controllers, chargers - commonly use ATmega88-class parts because the single-chip integration of flash, RAM, timers, ADC, and communication removes external glue logic. The ATMEGA88-15AD's 5V operation suits transformer-derived power supplies common in appliances, and its debugWIRE on-chip debug requires only a single wire, cutting development tooling cost. Internal 8 MHz RC oscillator option eliminates the crystal in timing-tolerant products, freeing two GPIO (PB6/PB7). TQFP-32's 0.8 mm pitch supports cost-effective two-layer PCB assembly in volume.
Recommended
Legacy 5V System Maintenance and Repair
The ATMEGA88-15AD is frequently sourced for maintaining legacy AVR-based equipment originally designed around Atmel 5V speed grades. Its pin compatibility with ATmega8, ATmega48, and ATmega168 in TQFP-32 allows board-level repair and refurbishment without PCB rework, and Microchip application note AVR094 documents the ATmega8-to-ATmega88 migration path. With 23 GPIO at robust 5V levels, replacement boards interface directly with existing optocouplers, relays, and displays. Engineers repairing such systems should verify fuse settings during reprogramming, as factory defaults differ from the retired ATmega8 generation.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA88-15AD — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA88A-AU | ATMEGA88PV-10AU | ATMEGA168-15AD | ATMEGA48V-10AI | ATMEGA168PA-AU |
|---|---|---|---|---|---|---|
| Package | TQFP-32 (7x7 mm, 0.8 mm pitch) | TQFP-32 (7x7 mm) - same | TQFP-32 (7x7 mm) - same | TQFP-32 (7x7 mm) - same | TQFP-32 (7x7 mm) - same | TQFP-32 (7x7 mm) - same |
| Brand | Microchip Technology (Atmel) | Microchip Technology | Microchip Technology | Microchip Technology (Atmel) | Microchip Technology | Microchip Technology |
| Flash Memory | 8 KB | 8 KB | 8 KB | 16 KB | 4 KB | 16 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB | 0.5 KB | 1 KB |
| Max Clock Speed | 16 MHz | 20 MHz | 10 MHz | 16 MHz | 10 MHz | 20 MHz |
| Supply Voltage Range | 4.5 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 | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| GPIO Count | 23 | 23 | 23 | 23 | 23 | 23 |
| Lifecycle Position | Active (successor ATMEGA88A recommended) | Active - recommended for new designs | Active - wide-voltage variant | Active (successor ATMEGA168A/PA) | Active (successor ATMEGA48PB/PA) | Active - picoPower variant |
Key Differentiators
- Full 16 MHz speed at guaranteed 5V operation (vs ATMEGA88PV-10AU)
- Lower cost than flash-doubled sibling (vs ATMEGA168-15AD)
- Legacy speed-grade availability for repairs (vs ATMEGA88A-AU)
Design Notes
Supply the ATMEGA88-15AD from a regulated 5V rail within 4.5V to 5.5V, placing 100 nF ceramic decoupling capacitors directly across each VCC/GND pin pair (pins 4/3-5/6) with a 10 uF bulk capacitor nearby. Connect AVCC (pin 18) to VCC through a low-pass filter (e.g., 10 uH inductor or 100-ohm resistor plus 100 nF) to keep ADC noise low. Below 4.5V the -15AD speed grade is out of specification - brownout detector fuse should be set to approximately 4.3V (BODLEVEL for 5V operation per Microchip fuse tables).
Route the crystal (if used) on pins 7/8 (PB6/PB7) with traces under 15 mm and guard with ground pour to prevent stray coupling; load capacitors per crystal specification, typically 22 pF for common 16 MHz crystals. Keep the AREF (pin 20) trace short with its own 100 nF capacitor to ground - never drive AREF when the internal reference is selected. The exposed TQFP-32 land pattern per IPC-7351 allows generous routing of the 23 GPIO; use 0.5 mm trace width for fan-out under the package.
PC6 is RESET by default: if you fuse it as GPIO (RSTDISBL), in-system programming via SPI is disabled and the chip can only be recovered with a parallel high-voltage programmer - avoid this unless the design is final. When migrating firmware from ATmega8, remember register names and fuse defaults changed per Microchip application note AVR094 (doc2553). Also, the -15AD '15' speed grade tops out at 16 MHz - do not substitute a 20 MHz crystal as if this were an ATmega88A part.
Compliance Information
Compliance status not stated in verified distributor data for this legacy Atmel speed grade; request material declaration from Microchip/distributor by date code. Not AEC-Q100 qualified - general purpose commercial/industrial grade.
