DS1254W

The DS1254W is designed as a fully static nonvolatile RAM (organized as 2M works by 8bits) with built-in real time clock. It has a self-contained lithium energy source and control circuitry which constantly monitors VCC for an out-of-tolerance condition.

DS1254W has nine features. (1)Real time clock keeps track of hundredths of seconds, seconds, minutes, hours, days, date, months, and years with automatic leap year compensation valid up to the year 2100. (2)2Mx8 NV SRAM. (3)Watch function is transparent to RAM operation. (4)Automatic data protection during power loss. (5)Unlimited write cycle endurance. (6)Surface-mountable BGA module construction. (7)Over 10 years of data retention in the absence of power. (8)Battery monitor checks remaining capacity daily. (9)+3.3V or +5V operation. Those are all the main features.

Some absolute maximum ratings of DS1254W have been concluded into several points as follow. (1)Its voltage on any pin relative to ground would be from -0.3V to +6.0V. (2)Its operating temperature range would be from 0°C to 70°C. (3)Its storage temperature range would be from -40°C to +70°C. It should be noted that stresses above those listed in absolute maximum ratings may cause permanent damage to device.

Also some DC electrical characteristics of DS1254W are concluded as follow. (1)Its input leakage current would be min -4.0uA and max +4.0uA. (2)Its I/O leakage current would be min -4.0uA and max +4.0uA. (3)Its output current at 2.4V would be min -1.0mA. (4)Its output current at 0.4V would be min 2.0mA. (5)Its standby current CE=2.2V would be typ 5.0mA and max 10mA. (6)Its standby current CE=Vcc-0.5V would be typ 3.0mA and max 5.0mA. (7)Its operating current tCYC=100ns would be max 85mA. (8)Its write protection voltage would be min 4.25V and max 4.50V. And so on. If you have any question or suggestion or want to know more information please contact us for details. Thank you!