CALENDAR Datasheet(PDF) - UPD4990A

Manufacturer	Part No.	Datasheet	Description
NEC	UPD4990A	129Kb / 20P	SERIAL I/O CALENDAR & CLOCK CMOS LSI
	UPD4991A	133Kb / 32P	4-BIT PARALLEL I/O CALENDAR CLOCK
	UPD4992	101Kb / 16P	8-Bit Parallel I/O Calendar Clock
	UPD1990AC	793Kb / 13P	SERIAL I/O CALENDAR & CLOCK CMOS LSI
Renesas Technology Corp	M16C26A-C	516Kb / 17P	Sample Program (Calendar)
Microchip Technology	MCP795W1X_12	1Mb / 54P	3V SPI Real-Time Clock Calendar with Enhanced Features and Battery Switchover
Microchip Technology	MCP79510-IMS	946Kb / 50P	3V SPI Real-Time Clock Calendar with Battery Switchover
NXP Semiconductors	PCF8583T	595Kb / 37P	Clock and calendar with 240 x 8-bit RAM
NXP Semiconductors	PCF8583PF5-112	595Kb / 37P	Clock and calendar with 240 x 8-bit RAM

CALENDAR Datasheet, PDF