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DS17285SN-3 Datasheet(PDF) 1 Page - Dallas Semiconductor |
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DS17285SN-3 Datasheet(HTML) 1 Page - Dallas Semiconductor |
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1 / 38 page  1 of 38 050802 FEATURES Incorporates industry standard DS1287 PC clock plus enhanced features: § Y2K compliant § +3V or +5V operation § SMI recovery stack § 64-bit silicon serial number § Power-control circuitry supports system power-on from date/time alarm or key closure § 32kHz output on power-up § Crystal select bit allows RTC to operate with 6pF or 12.5pF crystal § 114 bytes user NV RAM § Auxiliary battery input § 2kB additional NV RAM § RAM clear input § Century register § Date alarm register § Compatible with existing BIOS for original DS1287 functions § Available as chip (DS17285) or standalone module with embedded battery and crystal (DS17287) § Timekeeping algorithm includes leap-year compensation valid up to 2100 § Underwriters Laboratory (UL) recognized TYPICAL OPERATING CIRCUIT PIN ASSIGNMENT PWR 1 2 3 4 5 6 7 8 9 10 11 12 23 DS17287 24-Pin Encapsulated Package NC AD1 AD3 AD4 AD5 AD6 AD7 GND VCC SQW VBAUX RCLR NC IRQ KS RD NC WR ALE CS 24 22 21 20 19 18 17 16 15 14 13 NC AD0 AD2 PWR 1 2 3 4 5 6 7 8 9 10 11 12 23 DS17285 24-Pin DIP DS17285S 24-Pin SO X2 AD1 AD3 AD4 AD5 AD6 AD7 GND VCC SQW VBAUX RCLR VBAT IRQ KS RD GND WR ALE CS 24 22 21 20 19 18 17 16 15 14 13 X1 AD0 AD2 IRQ 1 28 KS VBAT 2 27 RD RCLR 3 26 GND VBAUX 4 25 WR SQW 5 24 ALE VCC 6 23 CS VCC 7 22 GND PWR 8 21 GND X1 9 20 AD7 X2 10 19 AD6 NC 11 18 NC ADO 12 17 AD5 AD1 13 16 AD4 AD2 14 15 AD3 DS17285E 28-Pin TSOP DS17285/DS17287 3V/5V Real-Time Clock www.maxim-ic.com |
Similar Part No. - DS17285SN-3 |
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Similar Description - DS17285SN-3 |
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