X40235S16I-BT1 Intersil, X40235S16I-BT1 Datasheet - Page 23

• Manufacturer Part Number: X40235S16I-BT1
• Description: IC VOLTAGE MON TRPL EE 16-SOIC
• Manufacturer: Intersil
• Type: Multi-Voltage Supervisorr

Specifications of X40235S16I-BT1

• Number Of Voltages Monitored: 3
• Output: Open Drain, Open Drain
• Reset: Active High/Active Low
• Reset Timeout: Adjustable/Selectable
• Voltage - Threshold: 1.75V, 2.95V, 4.45V
• 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

Setting a Higher V
To set a V
higher than the present threshold, the user must apply
the desired V
ing input pin (V
gramming voltage (Vp) must be applied to the WP pin
before a START condition is set up on SDA. Next, issue
on the SDA pin the Slave Address A0h, followed by the
Byte Address 01h for V
for V
V
initiates the programming sequence. Pin WP must then
be brought LOW to complete the operation (See Figure
23). The user does not have to set the WEL bit in the
CR register before performing this write sequence.
Setting a Lower V
In order to set V
present value, then V
ing to the procedure described below. Once V
has been “reset”, then V
voltage using the procedure described in “Setting a
Higher V
Resetting the V
To reset a V
age (Vp) to the WP pin before a START condition is
set up on SDA. Next, issue on the SDA pin the Slave
Address A0h followed by the Byte Address 03h for
V
by 00h for the Data Byte in order to reset V
STOP bit following a valid write operation initiates the
programming sequence. Pin WP must then be brought
LOW to complete the operation (See Figure 23). The
user does not have to set the WEL bit in the CR regis-
ter before performing this write sequence.
TRIPx
TRIP1
TRIP3
WP
SCL
. The STOP bit following a valid write operation
, 0Bh for V
SDA
TRIPx
, and a 00h Data Byte in order to program
TRIPx
TRIPx
TRIPx
Voltage”.
CC
R
S
T
A
T
threshold to a new voltage which is
TRIPx
voltage, apply the programming volt-
, V2MON or V3MON). Then, a pro-
TRIP2
TRIPx
TRIPx
threshold voltage to the correspond-
0 1 2 3 4 5 6 7
TRIPx
TRIPx
Voltage (x = 1,2,3).
, and 0Fh for V
TRIP1
TRIPx
Voltage (x = 1,2,3).
to a lower voltage than the
23
must first be “reset” accord-
Voltage (x = 1,2,3)
A0h
, 09h for V
can be set to the desired
†
X40231, X40233, X40235, X40237, X40239
Figure 23. Resetting the V
TRIP2
TRIP3
TRIPx
, and 0Dh
, followed
0 1 2 3 4 5 6 7
03h
0Bh
0Fh
. The
TRIPx
†
†
†
Resets VTRIP1
Resets VTRIP3
Resets VTRIP2
V
P
After being reset, the value of V
nal value of 1.7V.
V
The accuracy with which the V
can be controlled using the iterative process shown in
Figure 24.
If the desired threshold is less that the present thresh-
old voltage, then it must first be “reset” (See "Resetting
the V
The desired threshold voltage is then applied to the
appropriate input pin (V
the procedure described in Section “Setting a Higher
V
Once the desired V
error between the desired and (new) actual set thresh-
old can be determined. This is achieved by applying
V
higher than the desired threshold voltage, to the input
pin of the voltage monitor circuit whose V
programmed. For example, if V
desired level of 3.0 V, then a test voltage of 3.4 V may
be applied to the voltage monitor input pin V2MON. In
the case of setting of V
applied. In all cases, care should be taken not to
exceed the maximum input voltage limits.
After applying the test voltage to the voltage monitor
input pin, the test voltage can be decreased (either in
discrete steps, or continuously) until the output of the
voltage monitor circuit changes state. At this point, the
error between the actual/measured, and desired
threshold levels is calculated.
TRIPx
TRIPx
CC
TRIPx
TRIPx
to the device, and then applying a test voltage
Level
Voltage“ must be followed.
Accuracy (x = 1,2,3).
0 1 2 3 4 5 6 7
Data Byte
Voltage (x = 1,2,3).").
00h
†
TRIPx
CC
TRIP1
threshold has been set, the
, V2MON or V3MON) and
†
All others Reserved.
TRIPx
then only V
TRIPx
TRIP2
thresholds are set,
becomes a nomi-
was set to a
CC
TRIPx
April 11, 2005
need be
FN8115.0
was