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DS17487BN-3

Features: Y2K compliant3V or +5V operationSMI recovery stack64-bit silicon serial numberPower-control circuitry supports system power-on from date/time alarm or key closure32kHz output on power-upCrystal select bit allows RTC to operate with 6pF or 12.5pF crystal114 bytes user NV RAMAuxiliary batt...

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DS17487BN-3: Features: Y2K compliant3V or +5V operationSMI recovery stack64-bit silicon serial numberPower-control circuitry supports system power-on from date/time alarm or key closure32kHz output on power-upCr...

DS17487BN-3 Data Sheet

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Part Number:
DS17487BN-3
Supply Ability:
5000

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  • 1~5000
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Total Cost: $ 0.00

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Product Details

Description



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
4kB additional NV RAM
RAM clear input
Century register
Date alarm register
Compatible with existing BIOS for original DS1287 functions
Available as chip (DS17485) or standalone module with embedded battery and crystal (DS17487)
Timekeeping algorithm includes leap-year compensation valid up to 2100
Underwriters Laboratory (UL) recognized


Pinout

Connection Diagram


Specifications

Voltage Range on Any Pin Relative to Ground ..................-0.3V to +7.0V
Storage Temperature Range ........................................-40°C to +85°C
Soldering Temperature Rang...... +260C for 10 seconds (DIP) (Note 13)
                                                   See IPC/JEDEC Standard J-STD-020A for
                                                   Surface Mount Devices


Description

The DS17485/DS17487 are real-time clocks (RTC) designed as successors to the industry standard DS1285, DS1385, DS1485, DS1585, and DS1685 PC real-time clocks. These devices provide the industry standard DS1285 clock function with either +3V or +5V operation. The DS17485 also incorporates a number of enhanced features including a silicon serial number, power-on/off control circuitry, 114 bytes of user NV SRAM plus 4kB of additional NV RAM, and 32.768kHz output for sustaining power management activities.




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