The DS1558 by Dallas Semiconducotr is a Watchdog Clock. Below is the official datasheet preview.
| Part number | DS1558 |
|---|---|
| Manufacturer | Dallas Semiconducotr |
| File Size | 298.76 KB |
| Description | Watchdog Clock |
| Datasheet |
 DS1558_DallasSemiconducotr.pdf
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PIN 1, 13, 39 41, 43 2 3 4 5 6 7 8 9 10 11 12 14 27 29 30 31 32 36 44 15 16 17 19 20 21 22 23 18, 45, 48 24 NAME N.C.A18 A16 A14 A12 A7 A6 A5 A4 A3 A2 A1 A0 A10 A11 A9 A8 A13 A15 A17 DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 GND CER No Connection FUNCTION Address Inputs for Address Decode.The DS1558 uses the address inputs to determine whether or not a read or write cycle should be directed to the attached SRAM or to the RTC registers.Data Input/Outputs.Data input/output pins for the RTC registe
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