DS1554 Overview
A0 A14 - Address Inputs DQ0 DQ7 IRQ/FT RST - Data Input/Outputs - Interrupt, Frequency Test Output (Open Drain) - Power-On Reset Output (Open Drain) CE - Chip Enable OE - Output Enable WE - Write Enable VCC - Power-Supply Input GND - Ground N.C. DS9034-PCX+ or DS9034I-PCX+ required (must be ordered separately). The top mark will include a “+” on lead-fr.
DS1554 Key Features
- Integrated NV SRAM, Real-Time Clock (RTC), Crystal, Power-Fail Control Circuit, and Lithium Energy Source
- Clock Registers are Accessed Identically to the Static RAM; These Registers Reside in the 16 Top RAM Locations
- Century Byte Register (i.e., Y2K pliant)
- Precision Power-On Reset
- Programmable Watchdog Timer and RTC
- BCD-Coded Year, Month, Date, Day, Hours
- Battery Voltage-Level Indicator Flag
- Power-Fail Write Protection Allows for ±10% VCC Power-Supply Tolerance
- Lithium Energy Source is Electrically Disconnected to Retain Freshness Until Power is Applied for the First Time
- Also Available in Industrial Temperature Range: -40°C to +85°C