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DS1254 Datasheet(PDF) 1 Page - Dallas Semiconductor |
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DS1254 Datasheet(HTML) 1 Page - Dallas Semiconductor |
1 / 17 page 1 of 17 REV: 082203 Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata. FEATURES § Real-time clock (RTC) 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 § 2M x 8 NV SRAM § Watch function is transparent to RAM operation § Automatic data protection during power loss § Unlimited write-cycle endurance § Surface-mountable BGA module construction § Over 10 years of data retention in the absence of power § Battery monitor checks remaining capacity daily § +3.3V or +5V operation APPLICATIONS Telecom Switches Routers RAID Systems TYPICAL OPERATING CIRCUIT PACKAGE OUTLINE ORDERING INFORMATION PART PIN- PACKAGE TEMP RANGE TOP MARK DS1254WB- 150 BGA, 3.3V 0°C to +70°C DS1254W- 150 DS1254YB- 100 BGA, 5V 0°C to +70°C DS1254Y- 100 DS1254WB2- 150 BGA, 3.3V 0°C to +70°C DS1254W2- 150 DS1254YB2- 100 BGA, 5V 0°C to +70°C DS1254Y2- 100 PIN DESCRIPTION VCC - Supply Voltage A0–A20 - Address Inputs DQ0–DQ7 - Data I/O CE - Chip-Enable Input OE - Output-Enable Input WE - Write-Enable Input BW - Battery Warning Output (Open Drain) GND - Ground DS1254 2M x 8 NV SRAM with Phantom Clock www.maxim-ic.com Side -A- Shown (For Reference Only, Not to Scale) Component placement may vary. |
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