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SE95_7
?NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 07  2 September 2009
19 of 27
NXP Semiconductors
SE95
Ultra high accuracy digital temperature sensor and thermal watchdog
14. Application information
The SE95 is sensitive to power supplies with ramp-up time d2 ms and could NACK or
hang the I
2
C-bus. In most applications the SE95 will function properly since power
supplies have a >2 ms ramp-up time. If the power supply ramp-up time is d2 ms, use an
RC network with R = 300 & and C = 10 礔, as shown in
Figure
18, to add about 3 ms to
the ramp-up time. The 10 礔 capacitor is the same as the bypass capacitor that is
typically used to prevent uctuations on the power supply. The 300 & resistor will reduce
the supply voltage by about 45 mV since the SE95 supply current is about 150 礎. Ensure
the SE95 is the only device connected to the end of 300 & resistor since additional
devices would draw more current and cause a larger voltage drop across the resistor.
Fig 18.   Typical application circuit
002aae891
10 k&
SE95
detector or
interrupt line
SCL
SDA
A2
A1
A0
OS
V
CC
power supply
GND
digital logic
or tie to
V
CC
 or GND
I
2
C-bus
10 礔
300 &
power supply
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