DS1500 Maxim, DS1500 Datasheet - Page 7

• Manufacturer Part Number: DS1500
• Description: The DS1500 is a full-function, year 2000-compliant, real-time clock/calendar (RTC) with an alarm, watchdog timer, power-on reset, battery monitors, 256 bytes of on-board nonvolatile (NV) SRAM, NV control for backing up an external SRAM, and a 32
• Manufacturer: Maxim

Figure 5. 5V Power-Up/Down Waveform Timing
OUTPUTS
Warning: Under no circumstances are negative undershoots, of any amplitude, allowed when
device is in battery-backup mode.
V
INPUTS
V
PF(MAX)
PF(MIN)
V
RST
V
SO
CCI
t
PF
RECOGNIZED
VALID
t
F
t
FB
7 of 20
t
DR
HIGH-Z
DON'T CARE
t
R
RECOGNIZED
t
VALID
REC