DS1238S-10 Maxim Integrated Products, DS1238S-10 Datasheet - Page 3

• Manufacturer Part Number: DS1238S-10
• Description: IC MICROMAN W/FRESH 10% 16-SOIC
• Manufacturer: Maxim Integrated Products
• Series: MicroManagerr
• Type: Battery Backup Circuitr

Specifications of DS1238S-10

• Number Of Voltages Monitored: 1
• Output: Open Drain, Push-Pull
• Reset: Active High/Active Low
• Reset Timeout: 40 ms Minimum
• Voltage - Threshold: 4.37V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.300", 7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

DS1238
DS1238 FUNCTIONAL BLOCK DIAGRAM Figure 1
WATCHDOG TIMER
The DS1238 provides a watchdog timer function which forces the
, RST, and
signals to the
WDS
RST
active state when the strobe input (
) is not stimulated for a predetermined time period. This time period
ST
is described below in Table 1. The watchdog timeout period begins as soon as RST and
are inactive.
RST
If a high-to-low transition occurs at the
input prior to timeout, the watchdog timer is reset and begins
ST
to time out again. The
input timing is shown in Figure 2. In order to guarantee that the watchdog timer
ST
does not time out, a high-to-low transition on
must occur at or less than the minimum timeout of the
ST
watchdog as described in the AC Electrical Characteristics. If the watchdog timer is allowed to time out,
the
, RST, and
outputs are driven to the active state.
is a latched signal which indicates
WDS
RST
WDS
the watchdog status, and is activated as soon as the watchdog timer completes a full period as outlined in
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