Datasheet Details
| Part number | DS1689 |
|---|---|
| Manufacturer | Dallas Semiconductor |
| File Size | 375.24 KB |
| Description | (DS1689 / DS1693) 3-Volt/5-Volt Serialized Real-Time Clock |
| Datasheet |
 DS1689 Datasheet
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General Description
X1 X2
RCLR
AD0-AD7
PWR KS CS
ALE
WR
RD
VCCO
IRQ
ORDERING INFORMATION
PART # DS1689S DS1689SN DS1693 DESCRIPTION RTC IC, 28-pin SOIC RTC IC, 28-pin SOIC IND RTC Module; 28-pin DIP
SQW VCCI GND VBAT VBAUX PSEL
CEI CEO
- Crystal Input - Crystal Output - RAM Clear Input - Mux’ed Address/Data Bus -
Key Features
- Incorporates industry standard DS1287 PC clock plus enhanced features:.
- +3- 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 6 pF or 12.5 pF crystal.
- 114 bytes user NV RAM.
- Auxiliary battery input.