DS1558
FEATURES
- Integrated Real-Time Clock (RTC), Power Fail 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 the Absence of Power with Small Lithium Coin Cell(s) and Low-Leakage SRAM
- Precision Power-On Reset
- Programmable Watchdog Timer and RTC Alarm
- BCD-Coded Year, Month, Date, Day, Hours, Minutes, and Seconds with Automatic Leap Year pensation Valid Up to the Year 2100
- Battery Voltage-Level Indicator Flag
- Power-Fail Write Protection Allows for 10% VCC Power-Supply Tolerance
- Underwriters Laboratory (UL) Recognized
PIN CONFIGURATION
TOP VIEW
VBAT 2
38 RST
39 N.C.
VCCO
41 N.C.
43 N.C.
44 A17
45 GND
46 X2
47 X1
48 GND
N.C.
A18
A16
A14
A12
A7...
