ds1384 Maxim Integrated Products, Inc., ds1384 Datasheet - Page 17

• Manufacturer Part Number: ds1384
• Description: Ds1384 Watchdog Real Time Clocks Controller
• Manufacturer: Maxim Integrated Products, Inc.

INTERRUPT OUTPUTS PULSE MODE TIMING DIAGRAM (See Notes 8 and 9)
NOTES:
1) All voltages are referenced to ground.
2) Typical values are at +25°C and nominal supplies.
3) Outputs are open.
4) Value for voltage and currents is from the V
5) Write protection trip point occurs during power fail prior to switchover from V
6) Value for voltage and currents is from the V
7) Data retention time depends on the size of battery selected and the amount of current demanded by
8) Applies to both interrupt pins when the alarms are set to pulse.
9) Interrupt output occurs within 100ns of the alarm condition existing.
OUTPUT LOAD
the static RAM in backup mode. The battery capacity (mA • hr) to achieve a t
by the formula: C = (I
RAM at the battery voltage. For the DS1384 chip alone, a standard 48mAh lithium cell battery will
provide greater than 10 years of data retention in the absence of power.
BAT1
+ I
RAM
) x 24 x 365 x 10, where I
CCI
BAT
17 of 18
input pin to the V
input pin to the V
RAM
CCO
CCO
is the standby current of the static
pin.
pin.
CC
DR
to V
of 10 years is given
BAT
.