Cross Reference Table (NXP Flash MCU to Atmel Flash MCU Devices) Direct Replacements (Pin-to-Pin Compatible) ATMEL NXP (Flash) P/N AT89 (Flash) P/N High Speed AT89LP (Flash) P/N Package Type P89C51X2BN AT89S51-24PU AT89LP51-20PU 40-pin PDIP P89C51X2BA AT89S51-24JU AT89LP51-20JU 44-pin PLCC P89C51X2FA AT89S51-24JU AT89LP51-20JU 44-pin PLCC P89C51X2BBD AT89S51-24AU AT89LP51-20AU 44-pin TQFP P89V51X2FN AT89S51-24PU AT89LP51-20PU 40-pin PDIP P89V51X2FA AT89S51-24JU AT89LP51-20JU 44-pin PLCC P89V51X2FBD AT89S51-24JU AT89LP51-20AU 44-pin TQFP P89C51UBPN AT89S51-24PU AT89LP51-20PU 40-pin PDIP P89C51UBAA AT89S51-24JU AT89LP51-20JU 44-pin PLCC P89C51UBBB AT89S51-24AU AT89LP51-20AU 44-pin TQFP P89C51UFPN AT89S51-24PU AT89LP51-20PU 40-pin PDIP P89C51UFAA AT89S51-24JU AT89LP51-20JU 44-pin PLCC P89C51UFBB AT89S51-24AU AT89LP51-20AU 44-pin TQFP P89C52UBPN AT89S52-24PU AT89LP52-20PU 40-pin PDIP P89C52UBAA AT89S52-24JU AT89LP52-20JU 44-pin PLCC P89C52UBBB AT89S52-24AU AT89LP52-20AU 44-pin TQFP P89C52UFPN AT89S52-24PU AT89LP52-20PU 40-pin PDIP P89C52UFAA AT89S52-24JU AT89LP52-20JU 44-pin PLCC P89C52UFBB AT89S52-24AU AT89LP52-20AU 44-pin TQFP P89V52X2FN AT89S8253-24PU AT89LP52-20PU 40-pin PDIP P89V52X2FA AT89S8253-24JU AT89LP52-20JU 44-pin PLCC P89V52X2FBD AT89S8253-24AU AT89LP52-20AU 44-pin TQFP P89C54UBPN AT89C51RB2-3CSUM AT89LP51RB2-20PU 40-pin PDIP P89C54UBAA AT89C51RB2-SLSUM AT89LP51RB2-20JU 44-pin PLCC P89C54UBBB AT89C51RB2-RLTUM AT89LP51RB2-20AAU 44-pin VQFP P89C54UFPN AT89C51RB2-3CSUM AT89LP51RB2-20PU 40-pin PDIP P89C54UFAA AT89C51RB2-SLSUM AT89LP51RB2-20JU 44-pin PLCC P89C54UFBB AT89C51RB2-RLTUM AT89LP51RB2-20AAU 44-pin VQFP P89C58UBPN AT89C51RC2-3CSUM AT89LP51RC2-20PU 40-pin PDIP P89C58UBAA AT89C51RC2-SLSUM AT89LP51RC2-20JU 44-pin PLCC P89C58UBBB AT89C51RC2-RLTUM AT89LP51RC2-20AAU 44-pin VQFP P89C58UFPN AT89C51RC2-3CSUM AT89LP51RC2-20PU 40-pin PDIP P89C58UFAA AT89C51RC2-SLSUM AT89LP51RC2-20JU 44-pin PLCC P89C58UFBB AT89C51RC2-RLTUM AT89LP51RC2-20AAU 44-pin VQFP P89C51RA2BA AT89C51RB2-SLSUM AT89LP51RC2-20PU 44-pin PLCC P89C51RA2BBD AT89C51RB2-RLTUM AT89LP51RC2-20AAU 44-pin VQFP P89C51RB2BP AT89C51RB2-3CSUM AT89LP51RB2-20PU 40-pin PDIP P89C51RB2FP AT89C51RB2-3CSUM AT89LP51RB2-20PU 40-pin PDIP P89C51RB2BA AT89C51RB2-SLSUM AT89LP51RB2-20JU 44-pin PLCC P89C51RB2FA AT89C51RB2-SLSUM AT89LP51RB2-20JU 44-pin PLCC P89C51RB2BB AT89C51RB2-RLTUM AT89LP51RB2-20AAU 44-pin VQFP P89C51RB2FB AT89C51RB2-RLTUM AT89LP51RB2-20AAU 44-pin VQFP P89V51RB2FN AT89C51RB2-3CSUM AT89LP51RB2-20PU 40-pin PDIP P89V51RB2FA AT89C51RB2-SLSUM AT89LP51RB2-20JU 44-pin PLCC P89V51RB2BBC AT89C51RB2-RLTUM AT89LP51RB2-20AAU 44-pin VQFP P89CV51RB2FA AT89C51RB2-SLSUM AT89LP51RB2-20JU 44-pin PLCC P89CV51RB2FBC AT89C51RB2-RLTUM AT89LP51RB2-20AAU 44-pin VQFP P89LV51RB2BA AT89C51RB2-SLSUM AT89LP51RB2-20JU 44-pin PLCC P89LV51RB2BBC AT89C51RB2-RLTUM AT89LP51RB2-20AAU 44-pin VQFP P89C51RC2BP AT89C51RC2-3CSUM AT89LP51RC2-20PU 40-pin PDIP P89C51RC2BN AT89C51RC2-3CSUM AT89LP51RC2-20PU 40-pin PDIP AT89C51RC2FP AT89C51RC2-3CSUM AT89LP51RC2-20PU 40-pin PDIP P89C51RC2BA AT89C51RC2-SLSUM AT89LP51RC2-20JU 44-pin PLCC P89C51RC2FA AT89C51RC2-SLSUM AT89LP51RC2-20JU 44-pin PLCC P89C51RC2BB AT89C51RC2-RLTUM AT89LP51RC2-20AAU 44-pin VQFP P89C51RC2FB AT89C51RC2-RLTUM AT89LP51RC2-20AAU 44-pin VQFP P89V51RC2FN AT89C51RC2-3CSUM AT89LP51RC2-20PU 40-pin PDIP P89V51RC2FA AT89C51RC2-SLSUM AT89LP51RC2-20JU 44-pin PLCC P89V51RC2FBC AT89C51RC2-RLTUM AT89LP51RC2-20AAU 44-pin VQFP P89CV51RC2FA AT89C51RC2-SLSUM AT89LP51RC2-20JU 44-pin PLCC P89CV51RC2FBC AT89C51RC2-RLTUM AT89LP51RC2-20AAU 44-pin VQFP P89LV51RC2BN AT89C51RC2-3CSUM AT89LP51RC2-20PU 40-pin PDIP P89LV51RC2FA AT89C51RC2-SLSUM AT89LP51RC2-20JU 44-pin PLCC P89LV51RC2FBC AT89C51RC2-RLTUM AT89LP51RC2-20AAU 44-pin VQFP P89C51RD2BP N/A AT89LP51RD2-20PU 40-pin PDIP P89C51RD2FP N/A AT89LP51RD2-20PU 40-pin PDIP P89C51RD2BN N/A AT89LP51RD2-20PU 40-pin PDIP P89C51RD2BA AT89C51RD2-SLSUM AT89LP51RD2-20JU 44-pin PLCC P89C51RD2FA AT89C51RD2-SLSUM AT89LP51RD2-20JU 44-pin PLCC P89C51RD2BB AT89C51RD2-RLTUM AT89LP51RD2-20AAU 44-pin VQFP P89C51RD2FB AT89C51RD2-RLTUM AT89LP51RD2-20AAU 44-pin VQFP P89C51RD2BBD AT89C51RD2-RLTUM AT89LP51RD2-20AAU 44-pin VQFP P89C51RD+IA AT89C51RD2-SLSUM AT89LP51RD2-20JU 44-pin PLCC P89C51RD+JA AT89C51RD2-SLSUM AT89LP51RD2-20JU 44-pin PLCC P89C51RD+IB AT89C51RD2-RLTUM AT89LP51RD2-20AAU 44-pin VQFP P89C51RD+JB AT89C51RD2-RLTUM AT89LP51RD2-20AAU 44-pin VQFP P89V51RD2BN N/A AT89LP51RD2-20PU 40-pin PDIP P89V51RD2FN N/A AT89LP51RD2-20PU 40-pin PDIP P89V51RD2FA AT89C51RD2-SLSUM AT89LP51RD2-20JU 44-pin PLCC P89V51RD2FBC AT89C51RD2-RLTUM AT89LP51RD2-20AAU 44-pin VQFP P89LV51RD2BA AT89C51RD2-SLSUM AT89LP51RD2-20JU 44-pin PLCC P89LV51RD2FA AT89C51RD2-SLSUM AT89LP51RD2-20JU 44-pin PLCC P89LV51RD2BBC AT89C51RD2-RLTUM AT89LP51RD2-20AAU 44-pin VQFP P89V660FA (2 TWI) P89V660FBC (2 TWI) P89V662FA (2 TWI) P89V662FBC (2 TWI) P89V664FA (2 TWI) P89V664FBC (2 TWI) AT89C51IC2-SLSUM (1 TWI) AT89C51IC2-RLTUM (1 TWI) AT89C51IC2-SLSUM (1 TWI) AT89C51IC2-RLTUM (1 TWI) AT89C51ID2-SLSUM (1 TWI) AT89C51ID2-RLTUM (1 TWI) AT89LP51IC2-20JU (1TWI) AT89LP51IC2-20AAU (1TWI) AT89LP51IC2-20JU (1TWI) AT89LP51IC2-20AAU (1TWI) AT89LP51ID2-20JU (1TWI) AT89LP51ID2-20AAU (1TWI) 44-pin PLCC 44-pin VQFP 44-pin PLCC 44-pin VQFP 44-pin PLCC 44-pin VQFP