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Best Alternatives to ATMEGA328PB-AU

Package: TQFP-32Microchip Technology / AtmelProgrammersPackage / Case: TQFP-32Number of ADC Channels: 8 ChannelProgram Memory Size: 32 kBWatchdog Timers: Watchdog TimerCore: AVR

ATMEGA328PB-AU replacements need conservative review. The closest candidate is the same ATmega328PB device in another ordering suffix.

AI replacement insight

Electrical riskmedium

voltage matches on best candidate

Package risklow

TQFP-32 appears consistent

Firmware riskhigh

328P variants differ from 328PB

Sourcing riskmedium

lifecycle mostly active

Can it be replaced directly?

Direct replacement for ATMEGA328PB-AU should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

Check ATMEGA328PB-ANR first, then review 328P variants only for redesigns.

Main risk

Pinout and PB-specific peripherals.

Recommended alternatives

2
ATMEGA328P-AU package
ATMEGA328P-AU

Microchip Technology / Atmel

Needs validationhigh risk

ATMEGA328P-AU may work only with pinout, peripheral and firmware review.

View details

Alternative comparison matrix

Feature / factorATMEGA328PB-AUATMEGA328PB-ANRATMEGA328P-AUATMEGA328P-AURCompatibility / risk
PackageTQFP-32TQFP-32TQFP-32TQFP-32TQFP-32 — same package text; ATMEGA328P-AU: same package; ATMEGA328P-AUR: ES match
Pinout32-pin PBsame PB familyATmega328PATmega328Psame PB family / ATmega328P — pin map not shown; ATMEGA328P-AU: not drop-in; ATMEGA328P-AUR: family variant
Voltage1.8-5.5 V1.8-5.5 V1.8-5.5 Vnot listed1.8-5.5 V / not listed — ES match; ATMEGA328P-AU: summary; ATMEGA328P-AUR: key field absent
Temperature-40 to 105 C-40 to 105 Cnot listed+85 C max-40 to 105 C / not listed / +85 C max — web claim; ATMEGA328P-AU: grade unknown; ATMEGA328P-AUR: one ES row
InterfaceI2C SPI UARTPB deviceI2C SPI UARTI2C SPI USARTPB device / I2C SPI UART / I2C SPI USART — interface not listed; ATMEGA328P-AU: ES match; ATMEGA328P-AUR: ES match

Application & sourcing insights

Questions & answers

Verified drop-in options for ATMEGA328PB-AU are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.