DS1543 Key Features
- 70 70 ns access
- 100 100 ns access
- DS1543W-XXX
- Address Input
- Data Input/Outputs
- Interrupt, Frequency Test Output (Open-Drain)
- Power-On Reset Output (Open-Drain)
- Chip Enable
- Output Enable
- Write Enable
DS1543 is 64k NV Timekeeping RAM manufactured by Dallas Semiconducotr.
| Part Number | Description |
|---|---|
| DS1500 | Y2K Watchdog RTC |
| DS1501 | (DS1501 / DS1511) Y2K-Compliant Watchdog Real-Time Clocks |
| DS1511 | Y2K-Compliant Watchdog Real-Time Clocks |
| DS1553 | Year-2000-Compliant Timekeeping RAM |
| DS1554 | 256K NV Y2KC Timekeeping RAM |
User access to all registers within the DS1543 is acplished with a bytewide interface as shown in Figure 1. The RTC registers contain year, month, date, day, hours, minutes, and seconds data in 24-hour BCD format. Corrections for day of month and leap year are made automatically.