X40030_13 Datasheet, PDF (5/23 Pages) Intersil Corporation – Triple Voltage Monitor with Integrated CPU Supervisor

X40030, X40031, X40034, X40035
A manual reset input provides debounce circuitry for
minimum reset component count.
The Watchdog Timer provides an independent protection
mechanism for microcontrollers. When the microcontroller
fails to restart a timer within a selectable time out interval,
the device activates the WDO signal. The user selects the
interval from three preset values. Once selected, the interval
does not change, even after cycling the power.
TABLE 1. SELECTION TABLE
DEVICE
EXPECTED SYSTEM
VOLTAGES
V_TRIP1
(V)
V_TRIP2
(V)
X40030, X40031
2.0 to 4.75*
1.70 to 4.75
X40030A, X40031A
5V; 3V or 3.3V; 1.8V
4.55 to 4.65*
2.85 to 2.95
X40030B, X40031B
5V; 3V; 1.8V
4.35 to 4.45*
2.55 to 2.65
X40030C, X40031C
3.3V; 2.5V; 1.8V
2.95 to 3.05*
2.15 to 2.25
X40034, X40035
2.0 to 4.75*
0.90 to 3.50
X40034A, X40035A
5V; 3.3V; 1.5V
4.55 to 4.65*
1.25 to 1.35
X40034B, X40035B
5V; 3V or 3.3V; 1.5V
4.55 to 4.65*
1.25 to 1.35
X40034C, X40035C
5V; 3V or 3.3V; 1.2V
4.55 to 4.65*
0.95 to 1.05
*Voltage monitor requires V_CC to operate. Others are independent of V_CC
V_TRIP3
(V)
1.70 to 4.75
1.65 to 1.75
1.65 to 1.75
1.65 to 1.75
1.70 to 4.75
3.05 to 3.15
2.85 to 2.95
2.85 to 2.95
POR
(SYSTEM)
RESET = X40030
RESET = X40031
RESET = X40030
RESET = X40031
5
FN8114.2
August 25, 2008