DS1687N-5, DS1688, DS1689(DS1689S) Selling Leads, Datasheet
MFG:DALLAS Package Cooled:SMD-28 D/C:08+09+
DS1687N-5, DS1688, DS1689(DS1689S) Datasheet download
Part Number: DS1687N-5
MFG: DALLAS
Package Cooled: SMD-28
D/C: 08+09+
DS1687N-5, DS1688, DS1689(DS1689S)
- Table of contents:
Info of DS1687N-5
Info of DS1688
Info of DS1689(DS1689S)
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About DS1
PDF/DataSheet Download
Datasheet: DS1
File Size: 68288 KB
Manufacturer: Linear
Download : Click here to Download
About DS1688
PDF/DataSheet Download
Datasheet: DS1688
File Size: 401408 KB
Manufacturer: MAXIM
Download : Click here to Download
About DS1
PDF/DataSheet Download
Datasheet: DS1
File Size: 68288 KB
Manufacturer: Linear
Download : Click here to Download
DS1688 General Description
The DS1688/DS1691 are real-time clocks (RTCs) designed as successors to the industry standard DS1285, DS1385, DS1485, and DS1585 PC real-time clocks. These devices provide the industry standard DS1285 clock function with the new feature of either +3.0V or +5.0V operation and automatic backup and write protection to an external SRAM. The DS1688 also incorporates a number of enhanced features including a silicon serial number, power-on/off control circuitry, 114 bytes of user NV SRAM, power-on elapsed timer, and power-cycle counter.
DS1688 Features
· +3V or +5V Operation
· 64-Bit Silicon Serial Number
· 64-Bit Customer Specific ROM or Additional Serial Number Available
· Power Control Circuitry Supports System Power-On from Date/Time Alarm or Key Closure
· Automatic Battery Backup and Write Protection to External SRAM
· Crystal Select Bit Allows RTC to Operate with 6Pf or 12.5Pf Crystal
· 114 Bytes User NV RAM
· Auxiliary Battery Input
· RAM Clear Input
· Century Register
· 32kHz Output for Power Management
· 32-Bit VCC Powered Elapsed Time Counter
· 32-Bit VBAT Powered Elapsed Time Counter
· 16-Bit Power-Cycle Counter
· Compatible with Existing BIOS for Original DS1287 Functions
· Available as IC (DS1688) or Stand-Alone Module with Embedded Battery and Crystal (DS1691)
· Timekeeping Algorithm Includes Leap Year Compensation Valid Up to 2100
· 64-Bit Silicon Serial Number
· 64-Bit Customer Specific ROM or Additional Serial Number Available
· Power Control Circuitry Supports System Power-On from Date/Time Alarm or Key Closure
· Automatic Battery Backup and Write Protection to External SRAM
· Crystal Select Bit Allows RTC to Operate with 6Pf or 12.5Pf Crystal
· 114 Bytes User NV RAM
· Auxiliary Battery Input
· RAM Clear Input
· Century Register
· 32kHz Output for Power Management
· 32-Bit VCC Powered Elapsed Time Counter
· 32-Bit VBAT Powered Elapsed Time Counter
· 16-Bit Power-Cycle Counter
· Compatible with Existing BIOS for Original DS1287 Functions
· Available as IC (DS1688) or Stand-Alone Module with Embedded Battery and Crystal (DS1691)
· Timekeeping Algorithm Includes Leap Year Compensation Valid Up to 2100
DS1688 Connection Diagram
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