DS1558 Datasheet - Dallas Semiconducotr

DS1558 Watchdog Clock

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 us.

DS1558 Features

* Integrated Real-Time Clock (RTC), PowerFail Control Circuit, and NV RAM Controller

* Clock Registers are Accessed Identically to the Static RAM; These Registers are Resident in the 16 Top RAM Locations

* Century Register

* Greater than 10 Years of Timekeeping and Data Retention in

DS1558_DallasSemiconducotr.pdf