Specification	AT89LP428-20PU

Connectivity	SPI, UART, USART
Core Processor	8051
Core Size (Bit Width)	8 Bit
EEPROM Size (Depth)	512
EEPROM Size (Width)	8 bit
Mounting Type	Through Hole
Number of I/O	30
Operating Temperature (Max)	85 °C
Operating Temperature (Min)	-40 °C
Oscillator Type	Internal
Package Length	0.3 in
Package Name	28-DIP, 28-PDIP
Package Width	7.62 mm
Peripherals	WDT, PWM, Brown-out Detect, POR, Reset
Program Memory Depth	4 K
Program Memory Size	4 KB
Program Memory Type	FLASH
Program Memory Width	8 bit
RAM Size Depth	768
RAM Size Width	8 bit
Speed	20 MHz
Voltage - Supply (Vcc/Vdd) Maximum	5.5 V
Voltage - Supply (Vcc/Vdd) Minimum	2.4 V

AT89LP428 Series

Part	Number of I/O	Peripherals	Package Width	Package Name	Package Length	Core Processor	Oscillator Type	Speed	Package / Case	Program Memory Depth	Program Memory Width	Program Memory Size	RAM Size Width	RAM Size Depth	Program Memory Type	EEPROM Size (Width)	EEPROM Size (Depth)	Voltage - Supply (Vcc/Vdd) Maximum	Voltage - Supply (Vcc/Vdd) Minimum	Core Size (Bit Width)	Operating Temperature (Max)	Operating Temperature (Min)	Connectivity	Mounting Type
Microchip Technology AT89LP428-20JU	30	Brown-out Detect POR PWM Reset WDT	11.43 mm	32-PLCC	13.97 mm	8051	Internal	20 MHz	32-LCC (J-Lead)	4 K	8 bit	4 KB	8 bit	768	FLASH	8 bit	512	5.5 V	2.4 V	8 Bit	85 °C	-40 °C	SPI UART USART	Surface Mount
Microchip Technology AT89LP428-20MH	30	Brown-out Detect POR PWM Reset WDT	5 mm	32-VQFN	5 mm	8051	Internal	20 MHz	32-VFQFN Exposed Pad	4 K	8 bit	4 KB	8 bit	768	FLASH	8 bit	512	5.5 V	2.4 V	8 Bit	85 °C	-40 °C	SPI UART USART	Surface Mount
Microchip Technology AT89LP428-20AU	30	Brown-out Detect POR PWM Reset WDT	7 mm	32-TQFP	7 mm	8051	Internal	20 MHz	32-TQFP	4 K	8 bit	4 KB	8 bit	768	FLASH	8 bit	512	5.5 V	2.4 V	8 Bit	85 °C	-40 °C	SPI UART USART	Surface Mount
Microchip Technology AT89LP428-20PU	30	Brown-out Detect POR PWM Reset WDT	7.62 mm	28-DIP 28-PDIP	0.3 in	8051	Internal	20 MHz		4 K	8 bit	4 KB	8 bit	768	FLASH	8 bit	512	5.5 V	2.4 V	8 Bit	85 °C	-40 °C	SPI UART USART	Through Hole

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