x40031v14z-bt1 Intersil Corporation, x40031v14z-bt1 Datasheet - Page 7

• Manufacturer Part Number: x40031v14z-bt1
• Description: Triple Voltage Monitor With Integrated Cpu Supervisor
• Manufacturer: Intersil Corporation

returns and exceeds V
cuitry monitors the power supply connected to V2MON
pin. If V
For the X40034 and X40035, the V2FAIL signal
remains active until V
active until V2MON returns and exceeds V
sense circuitry is powered by V
cannot be monitored.
Low Voltage V3 Monitoring
The X40030, X40031, X40034, X40035 also monitors
a third voltage level and asserts V3FAIL if the voltage
falls below a preset minimum V
nal is either ORed with RESET to prevent the micro-
processor from operating in a power fail or brownout
condition or used to interrupt the microprocessor with
notification of an impending power failure. The V3FAIL
signal remains active until the V3MON drops below 1V
(V3MON falling). It also remains active until V3MON
returns and exceeds V
This voltage sense circuitry monitors the power supply
connected to V3MON pin. If V
be monitored.
Early Low V
This
RESET/RESET whenever V
voltage and returns high when V
V
(t
Figure 3. V
PURST
TRIP1
WDO
SCL
SDA
CMOS
) on this pin.
CC
voltage. There is no power up delay circuitry
= 0, V2MON can still be monitored.
TRIPX
CC
Detection (LOWLINE)
output
Set/Reset Conditions
0
A0h
V
TRIPX
CC
TRIP3
TRIP2
drops below 1V and remains
goes
7
.
CC
.This voltage sense cir-
CC
CC
TRIP3
(X = 1, 2, 3)
falls below the V
LOW
= 0, V3MON can still
. If V
7
. The V3FAIL sig-
CC
X40030, X40031, X40034, X40035
CC
0
earlier
exceeds the
= 0, V2MON
TRIP2
V
TRIP1
CC
.This
than
/V2MON/V3MON
7
V
Figure 2. Two Uses of Multiple Voltage Monitoring
P
0
Notice: No external components required to monitor three voltages.
Unreg.
Supply
6-10V
00h
1M
390K
1.8V
3.0V
Reg
Reg
Reg
5V
7
3.3V
5V
V
V2MON
V3MON
CC
X40031-B
V2MON
V3MON
(1.7V)
V
CC
X40031-A
t
RESET
V2FAIL
V3FAIL
WC
RESET
V2FAIL
V3FAIL
V
CC
V
CC
May 25, 2006
System
Reset
System
Reset
FN8114.1
Power
Fail
Interrupt