Specification	AT89LS51-16AU

Connectivity	USART, UART
Core Processor	8051
Core Size (Bit Width)	8 Bit
Mounting Type	Surface Mount
Number of I/O	32
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
Program Memory Depth	4 K
Program Memory Size	4 KB
Program Memory Type	FLASH
Program Memory Width	8 bit
RAM Size Depth	128
RAM Size Width	8 bit
Speed	16 MHz
Voltage - Supply (Vcc/Vdd) Maximum	4 V
Voltage - Supply (Vcc/Vdd) Minimum	2.7 V

AT89LS51 Series

Part	Number of I/O	Package Width	Package Name	Package Length	RAM Size Depth	RAM Size Width	Core Size (Bit Width)	Voltage - Supply (Vcc/Vdd) Minimum	Voltage - Supply (Vcc/Vdd) Maximum	Speed	Operating Temperature (Max)	Operating Temperature (Min)	Core Processor	Connectivity	Program Memory Type	Program Memory Depth	Program Memory Width	Program Memory Size	Peripherals	Package / Case	Mounting Type	Oscillator Type
Microchip Technology AT89LS51-16JU	32	16.6 mm	44-PLCC	16.6 mm	128	8 bit	8 Bit	2.7 V	4 V	16 MHz	85 °C	-40 °C	8051	UART USART	FLASH	4 K	8 bit	4 KB	WDT	44-LCC (J-Lead)	Surface Mount	Internal
Microchip Technology AT89LS51-16AC	32	10 mm	44‑TQFP	10 mm	128	8 bit	8 Bit	2.7 V	4 V	16 MHz	70 °C	0 °C	8051	UART USART	FLASH	4 K	8 bit	4 KB	WDT	44-TQFP	Surface Mount	Internal
Microchip Technology AT89LS51-16PU	32	15.24 mm	40-DIP 40-PDIP	0.6 in	128	8 bit	8 Bit	2.7 V	4 V	16 MHz	85 °C	-40 °C	8051	UART USART	FLASH	4 K	8 bit	4 KB	WDT		Through Hole	Internal
Microchip Technology AT89LS51-16AU	32	10 mm	44‑TQFP	10 mm	128	8 bit	8 Bit	2.7 V	4 V	16 MHz	85 °C	-40 °C	8051	UART USART	FLASH	4 K	8 bit	4 KB	WDT	44-TQFP	Surface Mount	Internal