Specification	AT89LP51RB2-20AU

A/D Channels	7 count
A/D Resolution (bits)	10 bit
Connectivity	EMI, UART, I2C, USART, EBI, SPI
Core Processor	8051
Core Size (Bit Width)	8 Bit
Mounting Type	Surface Mount
Number of I/O	40
Operating Temperature (Max)	85 °C
Operating Temperature (Min)	-40 °C
Oscillator Type	Internal
Package / Case	44-TQFP
Package Length	10 mm
Package Name	44‑TQFP
Package Width	10 mm
Peripherals	WDT, PWM, Brown-out Detect, POR, Reset
Program Memory Depth	24 K
Program Memory Size	24 KB
Program Memory Size	24KB
Program Memory Type	FLASH
Program Memory Width	8 bit
RAM Size Depth	1.375 K
RAM Size Width	8 bit
Speed	20 MHz
Voltage - Supply (Vcc/Vdd) Maximum	5.5 V
Voltage - Supply (Vcc/Vdd) Minimum	2.4 V

AT89LP51 Series

Part	Oscillator Type	Connectivity	Number of I/O	Operating Temperature (Max)	Operating Temperature (Min)	Program Memory Type	Package Width	Package Name	Package Length	Core Size (Bit Width)	RAM Size Depth	RAM Size Width	Peripherals	A/D Resolution (bits)	A/D Channels	Speed	Voltage - Supply (Vcc/Vdd) Maximum	Voltage - Supply (Vcc/Vdd) Minimum	Package / Case	Mounting Type	Core Processor	Program Memory Size	Program Memory Size	Program Memory Depth	Program Memory Width
Atmel AT89LP51RB2-20AU	Internal	EBI EMI I2C SPI UART USART	40	85 °C	-40 °C	FLASH	10 mm	44‑TQFP	10 mm	8 Bit	1.375 K	8 bit	Brown-out Detect POR PWM Reset WDT	10 bit	7 count	20 MHz	5.5 V	2.4 V	44-TQFP	Surface Mount	8051	24 KB	24KB	24 K	8 bit
Atmel AT89LP51-20MU	Internal	EBI EMI I2C SPI UART USART	36	85 °C	-40 °C	FLASH	7 mm	44-VQFN	7 mm	8 Bit	256	8 bit	Brown-out Detect POR PWM Reset WDT			20 MHz	5.5 V	2.4 V	44-VFQFN Exposed Pad	Surface Mount	8051	4 KB		4 K	8 bit
Atmel AT89LP51-20JU	Internal	EBI EMI I2C SPI UART USART	36	85 °C	-40 °C	FLASH	16.6 mm	44-PLCC	16.6 mm	8 Bit	256	8 bit	Brown-out Detect POR PWM Reset WDT			20 MHz	5.5 V	2.4 V	44-LCC (J-Lead)	Surface Mount	8051	4 KB		4 K	8 bit
Atmel AT89LP51IC2-20JU	Internal	EBI EMI I2C SPI UART USART	40	85 °C	-40 °C	FLASH	16.6 mm	44-PLCC	16.6 mm	8 Bit	1.375 K	8 bit	Brown-out Detect POR PWM Reset WDT	10 bit	7 count	20 MHz	5.5 V	2.4 V	44-LCC (J-Lead)	Surface Mount	8051	32 KB		32 K	8 bit
Atmel AT89LP51RB2-20MU	Internal	EBI EMI I2C SPI UART USART	40	85 °C	-40 °C	FLASH	7 mm	44-VQFN	7 mm	8 Bit	1.375 K	8 bit	Brown-out Detect POR PWM Reset WDT	10 bit	7 count	20 MHz	5.5 V	2.4 V	44-VFQFN Exposed Pad	Surface Mount	8051	24 KB	24KB	24 K	8 bit

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