ATMEGA88PA-MMN - 8KB Flash 20MHz AVR MCU | Microchip
MPN: ATMEGA88PA-MMN ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.6 | $3.60 |
| 10 | $3.28 | $32.80 |
| 100 | $2.86 | $286.00 |
| 500 | $2.51 | $1,255.00 |
| 1,000 | $2.05 | $2,050.00 |
ATMEGA88PA-MMN Overview
An 8-bit AVR microcontroller is a Harvard-architecture RISC processor that executes most instructions in a single clock cycle. Within the power-management hierarchy of embedded systems, it serves as the central control IC, integrating program memory, data memory, timers, communication peripherals and a 10-bit ADC on one die, replacing multi-chip discrete solutions.
Key features include the AVR advanced RISC architecture with 130 powerful instructions and 32 general-purpose working registers, three flexible timer/counters with compare modes, byte-oriented Two-Wire Interface (I2C-compatible), an SPI serial interface, a programmable USART, and an internal calibrated RC oscillator. The picoPower technology delivers very low power consumption in sleep modes, making it suitable for battery-operated designs.
The ATMEGA88PA-MMN combines self-programmable Flash with read-while-write capability and true ISP (In-System Programmability), allowing firmware updates over SPI via tools such as ISP programmers and debugWIRE. The 10-bit ADC provides up to 6 multiplexed single-ended input channels, supporting sensor interfacing directly without external converters.
Typical applications include industrial control and automation nodes, consumer appliance controllers, sensor acquisition systems, and battery-powered portable devices where the 4x4 mm VQFN footprint conserves board space. The wide operating voltage range of 2.5V/3.3V/5V class designs simplifies reuse across power architectures.
Design consideration: the maximum 20 MHz clock is only achievable at 4.5V to 5.5V supply; derate the clock frequency at lower operating voltages per the datasheet frequency-versus-voltage curve.
This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for ATMEGA88PA-MMN — 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 ATMEGA88PA-MMN (same form factor and footprint) — differing in Package, EEPROM, SRAM, ADC, Flash Memory.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATMEGA88A-MMH
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.12 / Unit
View Datasheet →ATMEGA168PA-MMN
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
ATMEGA328P-MN
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
ATMEGA48PA-MMNR
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.33 / Unit
View Datasheet →ATMEGA88PA-MMN Maximum Ratings & Electrical Characteristics
| Core Processor | AVR 8-bit RISC |
| Core Size | 8-bit |
| Speed | 20 MHz |
| Flash Memory | 8 KB (4K x 16) |
| EEPROM | 512 B |
| SRAM | 1 KB |
| General Purpose I/O | 23 |
| Operating Voltage Range | 2.5 V / 3.3 V / 5 V class (picoPower) |
| Timers/Counters | 3 (two 8-bit, one 16-bit) |
| Communication Interfaces | USART, SPI, TWI (I2C-compatible) |
| ADC | 10-bit, 6 channels |
| Package | 28-VQFN (4x4 mm) with exposed pad |
| Mounting Type | Surface Mount |
| Number of Pins | 28 |
| Architecture Features | 130 instructions, most single-cycle; 32 x 8-bit working registers |
| Programming | ISP (In-System Programmable), self-programmable Flash, read-while-write |
| Low Power Technology | picoPower |
ATMEGA88PA-MMN Pin Configuration
| Pin 1 | PC6 (RESET) — Reset input / ADC-capable port pin (active-low reset) |
| 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/OC2B) — Port D bit 3 / external interrupt 1 / Timer2 PWM output |
| Pin 6 | PD4 (T0/XCK) — Port D bit 4 / Timer0 external clock / USART external clock |
| Pin 7 | VCC — Digital supply voltage |
| Pin 8 | GND — Digital 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 (OC0B/T1) — Port D bit 5 / Timer0 PWM output / Timer1 external clock |
| Pin 12 | PD6 (OC0A/AIN0) — Port D bit 6 / Timer0 PWM output / analog comparator positive input |
| Pin 13 | PD7 (AIN1) — Port D bit 7 / analog comparator negative input |
| Pin 14 | PB0 (ICP1/CLKO) — Port B bit 0 / Timer1 input capture / system clock output |
| Pin 15 | PB1 (OC1A) — Port B bit 1 / Timer1 PWM output A |
| Pin 16 | PB2 (SS/OC1B) — Port B bit 2 / SPI slave select / Timer1 PWM output B |
| Pin 17 | PB3 (MOSI/OC2A) — Port B bit 3 / SPI Master Out Slave In / Timer2 PWM output |
| Pin 18 | PB4 (MISO) — Port B bit 4 / SPI Master In Slave Out |
| 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 — Analog reference voltage for ADC |
| Pin 22 | GND (AGND) — Analog ground |
| Pin 23 | PC0 (ADC0) — Port C bit 0 / ADC input channel 0 |
| Pin 24 | PC1 (ADC1) — Port C bit 1 / ADC input channel 1 |
| Pin 25 | PC2 (ADC2) — Port C bit 2 / ADC input channel 2 |
| Pin 26 | PC3 (ADC3) — Port C bit 3 / ADC input 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 |
| Pin PAD | GND (Exposed Pad) — Exposed pad - connect to PCB ground plane for grounding and thermal dissipation |
Typical Applications
ATMEGA88PA-MMN is suitable for 6 applications: Industrial Control and Automation, Battery-Powered Portable Devices, Sensor Acquisition Systems, Consumer Appliance Controllers, Embedded Networking Nodes, Legacy ATmega8/ATmega88 Design Upgrades.
Industrial Control and Automation
In industrial control nodes, the ATMEGA88PA-MMN acts as the local intelligence for relay sequencing, sensor polling, and actuator control. The AVR RISC core at 20 MHz executes most instructions in a single cycle, giving deterministic timing for control loops, while three flexible timer/counters with compare modes generate PWM for motor or heater drive without CPU overhead. The TWI and SPI interfaces connect to industrial sensors and isolated transceivers, and the 10-bit, 6-channel ADC digitizes 0-5V analog telemetry directly. The exposed-pad VQFN-28 package provides robust ground connection on vibration-prone PCBs, and firmware stored in self-programmable Flash can be field-updated via ISP during maintenance windows.
Recommended
Battery-Powered Portable Devices
The picoPower technology of the ATMEGA88PA-MMN makes it a strong fit for battery-operated products. In power-down sleep mode the device draws microamp-level current, and wake-up on pin change or watchdog interrupt lets the MCU stay asleep between events. Because the picoPower PA variant supports 2.5V, 3.3V, and 5V operating classes, a single firmware baseline works across two-cell alkaline, Li-ion, and regulated 5V supplies. The 4x4 mm VQFN conserves board area in compact enclosures, and the internal calibrated RC oscillator can eliminate the external crystal in timing-tolerant designs, cutting BOM cost and leakage paths. Designers should derate the maximum 20 MHz clock at lower supply voltages per the datasheet frequency-voltage curve.
Recommended
Sensor Acquisition Systems
For multi-channel sensor front ends, the ATMEGA88PA-MMN integrates a 10-bit successive-approximation ADC with 6 multiplexed single-ended inputs, removing the need for a separate ADC IC in low-speed applications. AREF and analog ground pins support precision reference schemes, while AVCC isolation keeps digital switching noise out of conversions. The USART streams converted data to a host or radio module, and TWI can configure digital sensors on the same two-wire bus. With 1KB SRAM, modest buffering of sample blocks is possible for burst-then-transmit power-cycling strategies common in wireless sensor nodes. EEPROM retains calibration constants across power cycles without external non-volatile memory.
Recommended
Consumer Appliance Controllers
Consumer appliances such as small kitchen equipment, fans, and chargers use the ATMEGA88PA-MMN as the main control IC driving keypads, LEDs, and small motors. The 23 GPIO lines directly handle button matrices and LED segments, while two 8-bit timers generate PWM and timebase interrupts for user-interface scanning. Operating at 5V the device reaches its full 20 MHz speed, providing headroom for responsive UI and motor control loops. The low-cost 8KB Flash suits fixed-function firmware, and the AVR toolchain (AVR GCC, Microchip Studio) plus debugWIRE single-wire debugging reduces development cost. Compliance-focused manufacturers benefit from the documented Microchip quality and long product lifecycle.
Recommended
Embedded Networking Nodes
In small networked endpoints - door controllers, HVAC dampers, lighting controls - the ATMEGA88PA-MMN provides all three major serial interfaces: byte-oriented TWI (I2C-compatible) for board-level peripherals, SPI for high-speed peripherals or external Flash, and a full-duplex USART for RS-485/UART links through external transceivers. Hardware compare-match timers implement Modbus-compliant character timing in firmware without crystal-precise CPU loading. The 8KB program space accommodates compact protocol stacks typical of simple field devices; if a fuller stack is required, the pin-compatible ATMEGA328P-MN doubles SRAM to 2KB and quadruples Flash with no PCB change, giving a risk-free migration path within the same footprint.
Recommended
Legacy ATmega8/ATmega88 Design Upgrades
The ATMEGA88PA-MMN is an ideal refresh vehicle for legacy ATmega8 designs: per Microchip application note AVR094, ATmega88 is pin compatible with ATmega8 with a very similar feature set, and the PA revision adds picoPower efficiency. Migrating a 28-pin MLF ATmega8 socket to the ATMEGA88PA-MMN typically requires only linker/register-name updates in firmware (the register map was enhanced) plus verification of any EEPROM-dependent code. Benefits include faster 20 MHz operation (vs 16 MHz on ATmega8), self-programmable Flash for bootloader-based field updates, and continued active-lifecycle supply from Microchip. Supply-chain teams use this drop-in to rescue EOL ATmega8/ATmega48 production lines without PCB respins.
Recommended
Recommended Products Summary
Engineering reference data for ATMEGA88PA-MMN — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMEGA88A-MMH | ATMEGA168PA-MMN | ATMEGA328P-MN | ATMEGA48PA-MMN |
|---|---|---|---|---|---|
| Package | 28-VQFN (4x4 mm) exposed pad | 28-VQFN (4x4 mm) - same | 28-VQFN (4x4 mm) - same | 28-VQFN (4x4 mm) - same | 28-VQFN (4x4 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 8 KB | 8 KB | 16 KB | 32 KB | 4 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 2 KB | 512 B |
| EEPROM | 512 B | 512 B | 512 B | 1 KB | 256 B |
| Max Clock Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| picoPower Technology | Yes (PA revision) | No (older A revision) | Yes (PA revision) | Yes (P revision) | Yes (PA revision) |
| Pinout Compatibility | ATmega88 28-pin map | Pin-to-pin identical | Pin-to-pin identical | Pin-to-pin identical | Pin-to-pin identical |
Key Differentiators
- picoPower low-power technology (vs ATMEGA88A-MMH)
- Cost-efficient 8KB for fixed-function firmware (vs ATMEGA328P-MN)
- Twice the memory of the value tier at same pinout (vs ATMEGA48PA-MMN)
Design Notes
Supply filtering: connect AVCC (pin 20) to VCC through a low-pass filter (typically 10 uH inductor or ferrite bead plus 100 nF capacitor) even when the ADC is unused, per the manufacturer datasheet connection guidelines. Decouple VCC and AVCC each with 100 nF ceramic capacitors placed within a few millimeters of the pins. The wide voltage window of the PA revision (2.5V/3.3V/5V classes) means brown-out detector thresholds must be set to match the chosen supply, not left at defaults.
The exposed pad on the underside of the 28-VQFN is the device ground and must be soldered to a grounded copper pad with an array of thermal vias. An unsoldered or poorly wetted exposed pad is the most common cause of intermittent grounding and reset faults on MLF/VQFN AVRs during reflow. Define a stencil aperture of roughly 70-80% pad coverage to prevent excessive solder bump that lifts the perimeter leads.
Clock derating: the full 20 MHz speed is only valid at the top of the supply range; below 4.5V the safe maximum frequency is lower per the datasheet frequency-versus-voltage curve. Running 20 MHz at 3.3V risks marginal instruction execution. Also note PC6 (RESET) can be reconfigured as a weak I/O via fuse programming - doing so disables external reset and complicates in-circuit ISP recovery, so leave RESET as reset unless pin count is exhausted.
Keep the crystal (PB6/PB7) traces as short as possible and guard them with ground, since XTAL nodes are high-impedance. If using the internal RC oscillator instead, PB6/PB7 free up as GPIO, but verify timing-critical peripherals (USART baud rate, Modbus timing) tolerate the RC accuracy over temperature. debugWIRE uses the RESET line as a single-wire debug interface; disable it (fuse DWEN) before deploying to production to avoid unintended behavior.
Compliance Information
Compliance status not stated in the provided web data; verify on the official Microchip product page or datasheet before final qualification.
