SE98ATP,547 NXP Semiconductors, SE98ATP,547 Datasheet - Page 8

• Manufacturer Part Number: SE98ATP,547
• Description: IC TEMP SENSOR DDR 8-HWSON
• Manufacturer: NXP Semiconductors

Specifications of SE98ATP,547

• 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: Yes
• Voltage - Supply: 1.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-WSON (Exposed Pad), 8-HWSON
• Temperature Threshold: Programmable
• Full Temp Accuracy: +/- 1 C
• Digital Output - Bus Interface: 2-Wire, SMBus, I2C
• Digital Output - Number Of Bits: 11
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 1.7 V
• Description/function: DDR Memory Module Temperature Sensor
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Supply Current: 250 uA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 568-4731-2; SE98ATP,147

NXP Semiconductors
SE98A_4
Product data sheet
7.3.2.1 Alarm window
7.3.2 EVENT thresholds
The device provides a comparison window with an UPPER trip point and a LOWER trip
point, programmed through the Upper Boundary Alarm Trip register (02h), and Lower
Boundary Alarm Trip register (03h). The Upper Boundary Alarm Trip register holds the
upper temperature trip point, while the Lower Boundary Alarm Trip register holds the lower
temperature trip point as modified by hysteresis as programmed in the Configuration
register. When enabled, the EVENT output triggers whenever entering or exiting (crossing
above or below) the alarm window.
The Upper Boundary Alarm Trip should always be set above the Lower Boundary Alarm
Trip.
•
•
Advisory notification:
– NXP device: The EVENT output can be cleared through the Clear EVENT bit
– Competitor device: The EVENT output can be cleared only through the
– Work-around: Only clear EVENT output using the Clear EVENT bit (CEVNT).
– There will be no change to the NXP device.
Advisory notification:
– NXP device: Requires one conversion cycle (125 ms) after setting the alarm
– Competitor devices: Compares the alarm limit with temperature register at any
– Work-around: Wait at least 125 ms before enabling EVENT output (EOCTL = 1).
– SE98B will compare alarm window and temperature register immediately after
(CEVNT) or SMBus ALERT.
Clear EVENT bit (CEVNT).
window before comparing the alarm limit with temperature register to ensure that
there is correct data in the temperature register before comparing with the Alarm
Window and operating EVENT output.
time, so they get the EVENT output immediately when new UPPER or LOWER
Alarm Windows and the EVENT output are set at the same time.
setting.
Rev. 04 — 25 November 2009
DDR memory module temp sensor, 1.7 V to 3.6 V
© NXP B.V. 2009. All rights reserved.
SE98A
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