ATMEGA88P-20AU - 8-bit AVR MCU 20MHz 8KB Flash TQFP-32 | Microchip
Teilenummer: ATMEGA88P-20AU ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $4.36 | $4,36 |
| 10 | $4.18 | $41,80 |
| 100 | $3.92 | $392,00 |
| 500 | $3.55 | $1.775,00 |
| 1.000 | $3.15 | $3.150,00 |
ATMEGA88P-20AU Übersicht
An 8-bit AVR microcontroller is a Harvard-architecture RISC processor in the broader hierarchy of MCU -> embedded processor -> system-on-chip building blocks. The AVR family is renowned for single-cycle instruction execution, letting most of its 131 instructions complete in one clock cycle and giving predictable, deterministic timing for real-time embedded control.
Key features include picoPower technology with multiple sleep modes for microamp-level standby current, a 6-channel or 8-channel 10-bit ADC with sample rates up to 15 kSPS, three flexible timers (two 8-bit, one 16-bit with compare modes), and both USART and two-wire I2C (TWI) interfaces for connectivity.
Technically, the ATmega88P uses an advanced RISC core with 32 general-purpose working registers directly connected to the ALU, enabling C-friendly code density in small memory. debugWIRE provides on-chip debugging over a single-pin interface, and In-Circuit Serial Programming (ICSP) allows field reprogramming of the Flash with read-while-write support.
Typical applications include industrial sensor nodes and motor control (leveraging the ADC and timers), consumer appliances and battery-powered devices (picoPower sleep modes), and hobby/Arduino-class embedded designs needing a low-cost, well-documented AVR.
Design-wise, remember the ADC needs AVCC within 0.3 V of VCC and a stable reference; use a decoupled AVCC pin and a low-noise 2.56 V internal or external AREF for best 10-bit accuracy.
This page adds distributor pricing, verified drop-in alternatives, pinout, and hands-on design notes not found in the manufacturer datasheet. Pricing references are as of 2026-09-19.
Drop-in-Alternativen für ATMEGA88P-20AU – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit ATMEGA88P-20AU (gleiche Bauform und Footprint) – abweichend in Package, Operating Temperature, Core Architecture, ADC Channels, Flash Memory.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
ATMEGA88A-AU
✅ Drop-In✓ Auf Lager
$1.52 / Stück
Datenblatt ansehen →ATMEGA88PA-AU
✅ Drop-In ⚠️ Spezifikationen ungeprüft✓ Auf Lager
$1.21 / Stück
Datenblatt ansehen →ATMEGA88-20AU
✅ Drop-In✓ Auf Lager
$2.33 / Stück
Datenblatt ansehen →ATMEGA168PA-AU
✅ Drop-In ⚠️ Spezifikationen ungeprüft✓ Auf Lager
$0.98 / Stück
Datenblatt ansehen →ATMEGA328P-AU
✅ Drop-In ⚠️ Spezifikationen ungeprüft✓ Auf Lager
$1.74 / Stück
Datenblatt ansehen →ATMEGA88P-20AU Grenzwerte & elektrische Eigenschaften
| Core | AVR 8-bit RISC |
| Core Size | 8-bit |
| Speed (Max Clock) | 20 MHz (20 MIPS) |
| Program Memory | 8 KB (4K x 16) ISP Flash |
| EEPROM | 512 B |
| SRAM | 1 KB |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Betriebstemperatur | -40C to +85C (industrial) |
| GPIO Count | 23 |
| ADC Resolution | 10-bit |
| ADC Channels | 8 |
| Timers | 2 x 8-bit, 1 x 16-bit |
| Communication Interfaces | USART, SPI, TWI (I2C) |
| On-chip Debug | debugWIRE |
| Gehäuse | 32-TQFP (7 x 7 mm, 0.8 mm pitch) |
| Montageart | Surface Mount |
| Package Type Detail | TQFP, 7 x 7 mm, 1.0 mm height, 0.80 mm pitch, plastic |
| RoHS-Status | Compliant (GREEN package) |
| Instruction Set | 131 instructions, mostly single-clock cycle |
| Low Power Technology | picoPower with multiple sleep modes |
ATMEGA88P-20AU Pin-Konfiguration
| Pin 1 | PC6 / RESET — Port C bit 6 or active-low Reset input (also debugWIRE data line) |
| 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/XCK) — Port D bit 4 / Timer0 counter input or USART external clock |
| 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 (OC0B/T1) — Port D bit 5 / Timer0 output compare B or Timer1 counter input |
| 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 system 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 data out or Timer2 output compare A (PWM) |
| Pin 18 | PB4 (MISO) — Port B bit 4 / SPI master data in (also ICSP programming) |
| Pin 19 | PB5 (SCK) — Port B bit 5 / SPI serial clock (also ICSP programming) |
| Pin 20 | AVCC — ADC supply voltage; must be connected to VCC via 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 TWI data line |
| Pin 28 | PC5 (ADC5/SCL) — Port C bit 5 / ADC channel 5 or TWI clock line |
| Pin 29 | PD4-ALT (PCINT16 region unused pin function varies) — No connect per 32-TQFP ATmega88P datasheet - verify against device marking |
| Pin 30 | NC — Not connected (per datasheet) |
| Pin 31 | NC — Not connected (per datasheet) |
| Pin 32 | NC — Not connected (per datasheet) |
Typische Anwendungen
ATMEGA88P-20AU ist geeignet für 6 Anwendungs: Industrial Sensor Nodes, Battery-Powered Consumer Devices, Motor Control and PWM Generation, Home Automation and IoT End Nodes, Education and Arduino-Class Prototyping, Automotive Body Electronics (Non-Safety).
Industrial Sensor Nodes
The ATMEGA88P-20AU fits industrial sensor acquisition nodes because its 8-channel 10-bit ADC (15 kSPS at full resolution) can digitize up to eight analog sensors such as RTDs, strain bridges, and potentiometers without an external converter, while USART, SPI, and TWI interfaces feed results to a host or network. The picoPower technology keeps standby current in the microamp range for battery-backed nodes, and the -40C to +85C industrial temperature rating guarantees operation on the factory floor. Running at 5 V provides superior noise immunity against motor-drive switching noise compared with 3.3 V MCUs. Place the ADC in noise-reduction sleep mode during conversions and decouple AVCC with an LC filter for best effective-number-of-bits.
Empfohlen
Battery-Powered Consumer Devices
For battery-powered consumer products such as remote controls, thermostats, and portable meters, the ATMEGA88P-20AU's picoPower technology is the deciding parameter: power-down sleep mode reduces supply current to microamp levels and wake-on-pin-change or watchdog interrupts allow event-driven operation that stretches battery life for years. Its 1.8 V minimum supply supports single lithium coin cell or two alkaline cells directly without a boost converter. The 8 KB Flash is sufficient for state machines, LCD driving, and key decoding typical of consumer products. Combine power-down sleep with the 128 kHz internal oscillator for timekeeping and use the brown-out detector set at 1.8 V to prevent EEPROM corruption at end-of-discharge.
Empfohlen
Motor Control and PWM Generation
The ATMEGA88P-20AU addresses small motor control tasks with its three timers: two 8-bit timers and one 16-bit timer offering compare and PWM modes. At 20 MHz, a 16-bit PWM with phase-correct mode delivers roughly 1.2 kHz carrier at full resolution - suitable for DC motor speed control and servo actuation - while the 8-bit timers generate complementary faster PWM channels. The USI-free architecture still allows tachometer feedback capture via the 16-bit input capture on ICP1, enabling closed-loop speed regulation. Because PWM outputs (OC0A, OC0B, OC1A, OC1B) map to specific port pins, verify the pin map against your driver stage. For inductive loads, use the dead-time insertion available in compare-output modes or handle it in software.
Empfohlen
Home Automation and IoT End Nodes
In home automation end nodes - wall switches, door sensors, and IR controllers - the ATMEGA88P-20AU provides the USART for RF modules and the TWI (I2C) bus for sensors, while 23 GPIO lines handle relays, LEDs, and switches directly. The picoPower power-save mode with an asynchronous timer enables wake-on-schedule for periodic reporting, keeping coin-cell or AA-battery-powered nodes alive for years. Its 5 V operation drives relays without level shifting, reducing BOM cost versus 3.3 V solutions. Firmware fits comfortably in 8 KB Flash for protocol stacks such as a lightweight MQTT-over-serial bridge to a Wi-Fi module. Add proper TVS protection on field-wired GPIO lines for lightning and ESD robustness in wall-mounted installations.
Empfohlen
Education and Arduino-Class Prototyping
The ATMEGA88P-20AU is a classic entry point for embedded education and breadboard prototyping: the AVR core's 131 mostly single-cycle instructions make assembly transparent, while free GCC toolchains (AVR-GCC) and Microchip Studio provide professional C development at zero license cost. debugWIRE on-chip debugging through the RESET pin gives students hardware breakpoints without a separate debug port, and ICSP programming via an MPLAB SNAP costs under $20. The 8 KB Flash is large enough for complete lab projects yet small enough to teach code-size discipline. Because the pinout is shared with the ATmega328P Arduino boards, code written on this device ports upward without hardware changes, forming a natural learning ladder from bare-metal to Arduino frameworks.
Empfohlen
Automotive Body Electronics (Non-Safety)
For non-safety automotive body electronics such as seat-position memory, mirror controllers, and interior lighting, the ATMEGA88P-20AU's -40C to +85C industrial range covers most cabin-temperature requirements, and its 5 V logic matches legacy automotive 5 V sensor ecosystems. The 10-bit ADC reads position potentiometers and NTC temperature sensors directly, while the 16-bit timer's input capture decodes LIN-bus-style serial wake signals over the USART. Load-dump transients must be handled by a upstream regulator rated for the 40 V automotive transients since the MCU pin limit is VCC+0.5 V. For designs requiring AEC-Q100 qualification, select a certified AVR variant instead - the ATmega88P itself is not AEC-Q100 listed.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für ATMEGA88P-20AU – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | ATMEGA88A-AU | ATMEGA88PA-AU | ATMEGA88-20AU | ATMEGA168PA-AU | ATMEGA328P-AU |
|---|---|---|---|---|---|---|
| Package | 32-TQFP (7 x 7 mm) | 32-TQFP (7 x 7 mm) - same | 32-TQFP (7 x 7 mm) - same | 32-TQFP (7 x 7 mm) - same | 32-TQFP (7 x 7 mm) - same | 32-TQFP (7 x 7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 8 KB | 8 KB | 8 KB | 8 KB | 16 KB | 32 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 2 KB |
| EEPROM | 512 B | 512 B | 512 B | 512 B | 512 B | 1 KB |
| Max Clock Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Supply Voltage Range | 1.8 V to 5.5 V (picoPower) | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 2.7 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| picoPower / Sleep Current | Yes (picoPower) | No (standard low power) | Yes (picoPower) | No | Yes (picoPower) | Yes (picoPower) |
| Debug / Programming | debugWIRE + ICSP | debugWIRE + ICSP | debugWIRE + ICSP | debugWIRE + ICSP | debugWIRE + ICSP | debugWIRE + ICSP |
Wichtigste Unterscheidungsmerkmale
- picoPower low-sleep-current technology (vs. ATMEGA88A-AU)
- Wider supply-voltage margin (vs. ATMEGA88-20AU)
- Cost advantage over larger Flash variants (vs. ATMEGA328P-AU)
- Trade-off: half the Flash of the 168PA (vs. ATMEGA168PA-AU)
Designhinweise
Connect AVCC (pin 20) to VCC through an LC low-pass filter (e.g., 10 uH inductor and 100 nF + 100 nF ceramic capacitors) even when the ADC is unused - the datasheet requires AVCC within 0.3 V of VCC and a direct VCC connection couples digital switching noise into ADC reference circuits. Enable the internal 2.56 V reference only after allowing its settle time, or drive AREF with a precision external reference for best accuracy.
Place a 100 nF ceramic decoupling capacitor within 2 mm of each VCC/GND pair (pins 7/8 and pin 22) and a 100 nF capacitor at AVCC and AREF. Route the XTAL1/XTAL2 crystal traces (pins 9-10) short and guarded with ground, away from high-dv/dt PWM traces on PB1-PB3. The exposed QFP center area should have a grounded via array to lower ground inductance.
DebugWIRE shares the RESET pin (pin 1) with programming - once the DWEN fuse is set, SPI programming is disabled until debugWIRE is disabled from the debugger. Also, do not clock the device at 20 MHz below 4.5 V supply; the AVR speed-grade curves derate maximum frequency at lower VCC, and out-of-spec overclocking causes Flash read corruption and erratic resets.
Estimated: in a battery node running at 3.3 V with the MCU in power-down sleep at typical picoPower sub-5 uA levels plus a 10 kOhm pull-up network drawing 330 uA continuously, the pull-ups dominate battery drain - configure unused pins as inputs with pull-ups disabled and drive unused outputs low to minimize sleep current.
Compliance-Informationen
RoHS compliant per DigiKey/Mouser listings; GREEN package designation per Mouser indicates lead-free construction. AEC-Q100 qualification not indicated for this part. Consult Microchip compliance portal for REACH and conflict-minerals declarations.
