STTS424BDN3F STMicroelectronics, STTS424BDN3F Datasheet - Page 23

• Manufacturer Part Number: STTS424BDN3F
• Description: IC MEMORY MOD TEMP SENSOR 8-TDFN
• Manufacturer: STMicroelectronics

Specifications of STTS424BDN3F

• Function: Temp Monitoring System (Sensor)
• Topology: ADC (Sigma Delta), Register Bank
• Sensor Type: Internal
• Sensing Temperature: -40°C ~ 125°C
• Output Type: I²C™/SMBus™
• Output Alarm: Yes
• Output Fan: No
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-TDFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-8502-2

STTS424
4.4
Note:
Table 13.
Temperature trip point registers (r/w)
The STTS424 alarm mode registers provide for 11-bit data in 2s compliment format. The
data provides for one LSB = 0.25°C. All unused bits in these registers are read as '0'.
The STTS424 has three temperature trip point registers (see
●
●
●
If the upper or lower boundary threshold values are being altered in-system, all interrupts
should be turned off until a known state can be obtained to avoid superfluous interrupt
activity.
Table 14.
Table 15.
P2
Bit
Bit
15
13
14
15
0
0
1
0
Alarm temperature upper boundary threshold
Alarm temperature lower boundary threshold
Critical temperature trip point value
P1
Below (temperature) alarm window
– 0 = Temperature is equal to or above the alarm window lower boundary temperature.
– 1 = Temperature is below the alarm window.
Above (temperature) alarm window
– 0 = Temperature is equal to or below the alarm window upper boundary temperature.
– 1 = Temperature is below the alarm window.
Above critical trip
– 0 = Temperature is below the critical temperature setting.
– 1 = Temperature is equal to or above the critical temperature setting.
Bit
14
1
1
0
0
P0
Bit
0
1
0
13
Temperature register bit definitions
Temperature trip point register format
Alarm temperature upper boundary register format
0
UPPER
LOWER
CRITICAL Critical temperature
Sign
MSB
Name
Bit
12
Bit
11
Alarm temperature upper boundary
Alarm temperature lower boundary
Alarm window upper boundary temperature
Bit
10
Definition with hysteresis = 0
Bit
Register description
9
(Table
Bit
8
Bit
17).
7
(Table
(Table
Bit
6
16), and
15),
Bit
5
Temperature sensor registers
Table
Bit
4
14):
Width
(bits)
16
16
16
Bit
3
LSB
(R/W)
Bit
Type
R/W
R/W
R/W
2
Bit
1
0
Default
(POR)
00 00
00 00
00 00
state
23/36
Bit
0
0