Atmel part numbers

Atmel (AVR ATmega/ATtiny, SAM Arm MCUs, AT24/AT25 EEPROM, CryptoAuthentication) was acquired by Microchip Technology in 2016.

Atmel is now Microchip Technology (2016). We quote Atmel parts — current, obsolete and end-of-life — and parts that carry older Atmel markings. See also all Microchip Technology part numbers.

5,159 Atmel heritage part numbers

Part-number families from Atmel, listed under their current manufacturer.

Part numberManufacturerTypePackageKey specs
AT89LP3240-20PU Microchip Technology Microcontrollers (MCU/MPU/SOC) PDIP-40 20MHz51 Series
AT89LP4052-20PU Microchip Technology Microcontrollers (MCU/MPU/SOC) PDIP-20 20MHz51 Series
AT89LP428-20AU Microchip Technology Microcontrollers (MCU/MPU/SOC) TQFP-32(7x7) 20MHz51 Series
AT89LP428-20MH Microchip Technology Microcontrollers (MCU/MPU/SOC) VQFN-32-EP(5x5) 20MHz51 Series
AT89LP428-20PU Microchip Technology Microcontrollers (MCU/MPU/SOC) SPDIP-28 20MHz51 Series
AT89LP51-20AU Microchip Technology Microcontrollers (MCU/MPU/SOC) TQFP-44(10x10) 20MHz51 Series
AT89LP51-20JU Microchip Technology Microcontrollers (MCU/MPU/SOC) PLCC-44(16.6x16.6) 20MHz51 Series
AT89LP51-20MU Microchip Technology Microcontrollers (MCU/MPU/SOC) VQFN-44-EP(7x7) 20MHz51 Series
AT89LP51-20PU Microchip Technology Microcontrollers (MCU/MPU/SOC) PDIP-40 20MHz51 Series
AT89LP51ED2-20AAU Microchip Technology Microcontrollers (MCU/MPU/SOC) LQFP-44(10x10) 20MHz51 Series
AT89LP51ED2-20AU Microchip Technology Microcontrollers (MCU/MPU/SOC) TQFP-44(10x10) 20MHz51 Series
AT89LP51ED2-20JU Microchip Technology Microcontrollers (MCU/MPU/SOC) PLCC-44(16.6x16.6) 20MHz51 Series
AT89LP51ED2-20MU Microchip Technology Microcontrollers (MCU/MPU/SOC) QFN-44-EP(7x7) 20MHz51 Series
AT89LP51ED2-20PU Microchip Technology Microcontrollers (MCU/MPU/SOC) PDIP-40 20MHz51 Series
AT89LP51IC2-20AAU Microchip Technology Microcontrollers (MCU/MPU/SOC) LQFP-44(10x10) 20MHz51 Series
AT89LP51IC2-20AU Microchip Technology Microcontroller Units (MCUs/MPUs/SOCs) LQFP-44(10x10) 20MHz51 Series
AT89LP51IC2-20JU Microchip Technology Microcontrollers (MCU/MPU/SOC) PLCC-44(16.6x16.6) 20MHz51 Series
AT89LP51IC2-20MU Microchip Technology Microcontrollers (MCU/MPU/SOC) VQFN-44-EP(7x7) 20MHz51 Series
AT89LP51ID2-20AAU Microchip Technology Microcontrollers (MCU/MPU/SOC) LQFP-44(10x10) 20MHz51 Series
AT89LP51ID2-20AU Microchip Technology Microcontrollers (MCU/MPU/SOC) TQFP-44(10x10) 20MHz51 Series
AT89LP51ID2-20JU Microchip Technology Microcontrollers (MCU/MPU/SOC) PLCC-44(16.6x16.6) 20MHz51 Series
AT89LP51ID2-20MU Microchip Technology Microcontrollers (MCU/MPU/SOC) VQFN-44-EP(7x7) 20MHz51 Series
AT89LP51RB2-20AAU Microchip Technology Microcontrollers (MCU/MPU/SOC) TQFP-44(10x10) 20MHz51 Series
AT89LP51RB2-20AU Microchip Technology Microcontrollers (MCU/MPU/SOC) TQFP-44(10x10) 20MHz51 Series
AT89LP51RB2-20JU Microchip Technology Microcontrollers (MCU/MPU/SOC) PLCC-44(16.6x16.6) 20MHz51 Series
AT89LP51RB2-20MU Microchip Technology Microcontrollers (MCU/MPU/SOC) VQFN-44-EP(7x7) 20MHz51 Series
AT89LP51RC2-20AAU Microchip Technology Microcontrollers (MCU/MPU/SOC) TQFP-44(10x10) 20MHz51 Series
AT89LP51RC2-20AU Microchip Technology Microcontrollers (MCU/MPU/SOC) TQFP-44(10x10) 20MHz51 Series
AT89LP51RC2-20JU Microchip Technology Microcontrollers (MCU/MPU/SOC) PLCC-44(16.6x16.6) 20MHz51 Series
AT89LP51RC2-20MU Microchip Technology Microcontrollers (MCU/MPU/SOC) VQFN-44-EP(7x7) 20MHz51 Series
AT89LP51RD2-20AAU Microchip Technology Microcontroller Units (MCUs/MPUs/SOCs) LQFP-44(10x10) 20MHz51 Series
AT89LP51RD2-20AU Microchip Technology Microcontrollers (MCU/MPU/SOC) TQFP-44(10x10) 20MHz51 Series
AT89LP51RD2-20JU Microchip Technology Microcontrollers (MCU/MPU/SOC) PLCC-44(16.6x16.6) 20MHz51 Series
AT89LP51RD2-20MU Microchip Technology Microcontrollers (MCU/MPU/SOC) VQFN-44-EP(7x7) 20MHz51 Series
AT89LP51RD2-20PU Microchip Technology Microcontrollers (MCU/MPU/SOC) PDIP-40 20MHz51 Series
AT89LP52-20AU Microchip Technology Microcontrollers (MCU/MPU/SOC) TQFP-44(10x10) 20MHz51 Series
AT89LP52-20JU Microchip Technology Microcontrollers (MCU/MPU/SOC) PLCC-44(16.6x16.6) 20MHz51 Series
AT89LP52-20MU Microchip Technology Microcontrollers (MCU/MPU/SOC) QFN-44-EP(7x7) 20MHz51 Series
AT89LP52-20PU Microchip Technology Microcontrollers (MCU/MPU/SOC) PDIP-40 20MHz51 Series
AT89LP6440-20AU Microchip Technology Microcontrollers (MCU/MPU/SOC) TQFP-44(10x10) 20MHz51 Series
AT89LP6440-20JU Microchip Technology Microcontrollers (MCU/MPU/SOC) PLCC-44(16.6x16.6) 20MHz51 Series
AT89LP6440-20MU Microchip Technology Microcontrollers (MCU/MPU/SOC) QFN-44-EP(7x7) 20MHz51 Series
AT89LP6440-20PU Microchip Technology Microcontrollers (MCU/MPU/SOC) PDIP-40 20MHz51 Series
AT89LP828-20AU Microchip Technology Microcontrollers (MCU/MPU/SOC) TQFP-32(7x7) 20MHz51 Series
AT89LP828-20MH Microchip Technology Microcontrollers (MCU/MPU/SOC) VQFN-32-EP(5x5) 20MHz51 Series
AT89LP828-20PU Microchip Technology Microcontrollers (MCU/MPU/SOC) PDIP-28 20MHz51 Series
AT89LS51-16AU Microchip Technology Microcontrollers (MCU/MPU/SOC) TQFP-44(10x10) 16MHz51 Series
AT89LS51-16JU Microchip Technology Microcontrollers (MCU/MPU/SOC) PLCC-44(16.6x16.6) 16MHz51 Series
AT89LS51-16PU Microchip Technology Microcontrollers (MCU/MPU/SOC) PDIP-40 16MHz51 Series
AT89LS52-16AU Microchip Technology Microcontrollers (MCU/MPU/SOC) TQFP-44(10x10) 16MHz51 Series
AT89LS52-16AUR Microchip Technology Microcontrollers (MCU/MPU/SOC) TQFP-44(10x10) 16MHz51 Series
AT89LS52-16JU Microchip Technology Microcontrollers (MCU/MPU/SOC) PLCC-44(16.6x16.6) 16MHz51 Series
AT89LS52-16PU Microchip Technology Microcontrollers (MCU/MPU/SOC) PDIP-40 16MHz51 Series
AT89S2051-24PU Microchip Technology Microcontrollers (MCU/MPU/SOC) PDIP-20 24MHz51 Series
AT89S2051-24SU Microchip Technology Microcontrollers (MCU/MPU/SOC) SOIC-20-300mil 24MHz51 Series
AT89S4051-24PU Microchip Technology Microcontrollers (MCU/MPU/SOC) PDIP-20 24MHz51 Series
AT89S4051-24SU Microchip Technology Microcontrollers (MCU/MPU/SOC) SOIC-20-300mil 24MHz51 Series
AT89S51-24AU Microchip Technology Microcontrollers (MCU/MPU/SOC) TQFP-44(10x10) 24MHz51 Series
AT89S51-24JU Microchip Technology Microcontrollers (MCU/MPU/SOC) PLCC-44(16.6x16.6) 24MHz51 Series
AT89S51-24PU Microchip Technology Microcontrollers (MCU/MPU/SOC) DIP-40 24MHz51 Series

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Frequently asked questions

Is Atmel still in business?

Atmel (AVR ATmega/ATtiny, SAM Arm MCUs, AT24/AT25 EEPROM, CryptoAuthentication) was acquired by Microchip Technology in 2016.

Can I still buy Atmel parts?

Yes. PartnerSemi quotes Atmel part numbers, including obsolete and end-of-life parts and parts with old Atmel markings. Send the part number and quantity; we reply with price, lead time, date code and origin. We are an independent distributor, not an authorized Atmel or Microchip Technology distributor.

PartnerSemi is not affiliated with Atmel or Microchip Technology. Brand names are used to identify parts only.