SE95D NXP Semiconductors, SE95D Datasheet - Page 11

• Manufacturer Part Number: SE95D
• Description: Board Mount Temperature Sensors I2C LOCAL +/- 1OC TS
• Manufacturer: NXP Semiconductors

Specifications of SE95D

• Full Temp Accuracy: +/- 3 C
• Package / Case: SOT-96
• Digital Output - Bus Interface: 2-Wire
• Digital Output - Number Of Bits: 13 bit
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 55 C
• Output Type: Digital
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: SE95D,112

NXP Semiconductors
SE95_7
Product data sheet
8.6 Overtemperature shutdown threshold and hysteresis registers
Obviously, for 9-bit Temp data application in replacing the industry standard LM75, just
use only 9 MSB bits of the two bytes and disregard 7 LSB of the LSByte. The 9-bit Temp
data with 0.5 C resolution of the SE95 is defined exactly in the same way as for the
standard LM75 and it is here similar to the Tos and Thyst registers.
These two registers, are write/read registers, and also called set-point registers. They are
used to store the user-defined temperature limits, called overtemperature shutdown
threshold (Tos) and hysteresis temperature (Thyst), for the device watchdog operation. At
the end of each conversion the Temp data will be compared with the data stored in these
two registers in order to set the state of the device OS output; see
Each of the set-point registers contains two 8-bit data bytes consisting of one MSByte and
one LSByte the same as register Temp. However, only 9 bits of the two bytes are used to
store the set-point data in two’s complement format with the resolution of 0.5 C.
and
Notice that because only 9-bit data are used in the set-point registers, the device uses
only the 9 MSB of the Temp data for data comparison.
Table 12.
Table 13.
When a set-point register is read, all 16 bits are provided to the bus and must be collected
by the controller to complete the bus operation. However, only the 9 most significant bits
should be used and the 7 LSB of the LSByte are equal to zero and should be ignored.
Table 14
Table 14.
MSByte
MSByte
11-bit binary
(two’s complement)
0 1111 1010
0 0011 0010
0 0000 0001
0 0000 0000
1 1111 1111
1 1100 1110
1 1001 0010
D8
D8
7
7
Table 13
D7
D7
6
6
shows examples of the limit data and value.
Tos register
Thyst register
Tos and Thyst register
D6
D6
5
5
show the bit arrangement of the Tos data and Thyst data in the data bytes.
Ultra high accuracy digital temperature sensor and thermal watchdog
D5
D5
4
4
Rev. 07 — 2 September 2009
Hexadecimal value
0FA
032
001
000
1FF
1CE
192
D4
D4
3
3
D3
D3
2
2
D2
D2
1
1
D1
D1
0
0
LSByte
LSByte
Decimal value
250
50
1
0
D0
D0
1
50
110
7
7
X
X
6
6
X
X
5
5
X
X
4
4
Section
Value
125.0 C
25.0 C
0.5 C
0.0 C
0.5 C
25.0 C
55.0 C
X
X
3
3
© NXP B.V. 2009. All rights reserved.
7.1.
X
X
2
2
SE95
X
X
Table 12
1
1
11 of 27
X
X
0
0