X40237S16I-AT1 Intersil, X40237S16I-AT1 Datasheet - Page 22

• Manufacturer Part Number: X40237S16I-AT1
• Description: IC VOLTAGE MON TRPL EE 16-SOIC
• Manufacturer: Intersil
• Type: Multi-Voltage Supervisorr

Specifications of X40237S16I-AT1

• Number Of Voltages Monitored: 3
• Output: Open Drain, Open Drain
• Reset: Active High/Active Low
• Reset Timeout: Adjustable/Selectable
• Voltage - Threshold: 1.75V, 2.2V, 2.95V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.300", 7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

V2MON Monitoring
The X4023x asserts the V2FAIL output HIGH if the
voltage V2MON exceeds the corresponding V
threshold (See Figure 21). The bit V2FS in the CR reg-
ister is then set to a “0” (assuming that it has been set
to “1” after system initialization).
The V2FAIL output may remain active HIGH with V
down to 1V. (See Figure 21)
V3MON Monitoring
The X4023x asserts the V3FAIL output HIGH if the
voltage V3MON exceeds the corresponding V
threshold (See Figure 21). The bit V3FS in the CR reg-
ister is then set to a “0” (assuming that it has been set
to “1” after system initialization).
The V3FAIL output may remain active HIGH with V
down to 1V. V
The X4023x is shipped with pre-programmed thresh-
old (V
required thresholds are different from the default val-
ues, or if a higher precision / tolerance is required, the
X4023x trip points may be adjusted by the user, using
the steps detailed below.
V
V3MON
V2MON,
CC
WP
TRIPx
SCL
SDA
) voltages. In applications where the
TRIPx
S
A
R
T
T
Thresholds (x = 1,2,3)
0 1 2 3 4 5 6 7
22
A0h
Figure 22. Setting V
X40231, X40233, X40235, X40237, X40239
†
V
TRIPx
0 1 2 3 4 5 6 7
01h
09h
0Dh
TRIP2
TRIP3
CC
CC
†
†
†
TRIPx
sets V
sets V
sets V
V
P
to a higher level (x = 1,2,3).
TRIP1
TRIP2
TRIP3
Setting a V
There are two procedures used to set the threshold
voltages (V
be stored is higher or lower than the present value. For
example, if the present V
V
into the V
lower than the present setting, then it is necessary to
“reset” the V
TRIPx
Vx
V
VxFAIL
(x = 2,3)
CC
Figure 21. Voltage Monitor Response
is 3.2 V, the new voltage can be stored directly
0 Volts
TRIPx
0 1 2 3 4 5 6 7
TRIPx
TRIPx
TRIPx
Data Byte
cell. If however, the new setting is to be
), depending if the threshold voltage to
00h
voltage before setting the new value.
Voltage (x = 1,2,3)
†
TRIPx
†
is 2.9 V and the new
All others Reserved.
V
V
TRIPx
TRIP1
April 11, 2005
0V
0V
FN8115.0