STTS424BDN3F STMicroelectronics, STTS424BDN3F Datasheet - Page 17

• 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
4.2
4.2.1
4.2.2
4.2.3
4.2.4
Note:
Configuration register (read/write)
The 16 bit Configuration register stores various configuration modes that are used to set up
the sensor registers and configure according to application and JEDEC 42.4 requirements
(see
Event thresholds
All event thresholds use hysteresis as programmed in register address 0x01 (bits 10 through
9) to be set when they de-assert.
Interrupt mode
The interrupt mode allows an event to occur where software may write a '1' to the clear
event bit (bit 5) to de-assert the event Interrupt output until the next trigger condition occurs.
Comparator mode
Comparator mode enables the device to be used as a thermostat. READs and WRITEs on
the device registers will not affect the event output in comparator mode. The event signal will
remain asserted until temperature drops outside the range or is re-programmed to make the
current temperature “out of range”.
Shutdown mode
The STTS424 features a shutdown mode which disables all power-consuming activities
(e.g. temperature sampling operations), and leaves the serial interface active. This is
selected by setting shutdown bit (bit 8) to '1'. In this mode, the devices consume the
minimum current (I
Bit 8 cannot be set to '1' while bits 6 and 7 (the lock bits) are set to '1'.
The device may be enabled for continuous operation by clearing bit 8 to '0'. In shutdown
mode, all registers may be read or written to. Power recycling will also clear this bit and
return the device to continuous mode as well.
Table 8.
Critical
lock bit
Bit15
RFU
Bit7
Table 8 on page 17
lock bit
Alarm
Configuration register format
Bit14
RFU
Bit6
SHDN
Bit13
Clear
event
RFU
Bit5
), as shown in
and
Table 9 on page
Event output
status
Bit12
RFU
Bit4
Table 22 on page
Event output
18).
control
Bit11
RFU
Bit3
28.
Hysteresis
event only
Critical
Bit10
Temperature sensor registers
Bit2
Hysteresis
polarity
Event
Bit9
Bit1
Shutdown
mode
Event
mode
Bit8
Bit0
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