1 of 30 May 12, 2010
© 2010 Integrated Device Technology, Inc. *Notice: The information in this document is subject to change without notice
DSC 7210/17
Advance Information
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Description
The TSE2002B3C digital temperature sensor with accuracy up to
±0.5°C was designed to target applications demanding highest level of
temperature readout. The device also contains 256 Byte EEPROM for
storage of vendor information and system configuration such as SPD for
DIMM modules. The sensor and the EEPROM are fully compliant with
JEDEC JC42.4 Component Specification.
The digital temperature sensor comes with several user-programmable
registers to provide maximum flexibility for temperature-sensing
applications. The registers allow specifying critical, upper, and lower
temperature limits as well as hysteresis settings. Both the limits and
hysteresis values are used for communicating temperature events from
the chip to the system. This communication is done using Event
pin,
which has an open-drain configuration. The user has the option of setting
the Event
pin polarity as either an active-low or active-high comparator
output for thermostat operation, or as a temperature event interrupt
output for microprocessor-based systems.
The sensor uses an industry standard 2-wire, I2C/SMBus serial
interface, and allows up to eight devices to be controlled on the bus.
The 2Kbit (256 Bytes) serial EEPROM memory in the part is organized
as a single block. Half the bytes in memory locations 00h to 7Fh can be
permanently locked with user defined or vendor defined information. The
protected data could also contain system information such as access
speed, size, and organization. The 128 bytes in addresses from 80h to
FFh can be used for general purpose data storage. These addresses are
not write-protected.
Memory Module Temp Sensor Application
Chipset
MCH
CPU
Memory
Module
Memory Bus
Temperature
sensor and
EEPROM
DRAMs
DRAMs
SMBus
EVENT#
(for memory
throttling)
Features
• Temperature Sensor + 256 Byte Serial EEPROM
• 256 Byte Serial EEPROM for SPD
• Single Supply: 3V to 3.6V
• Accurate timeout support
- Meets strict SMBus spec of 25ms (min), 35ms (max)
• Timeout supported for Temp Sensor and EEPROM
• Timeout supported in all Modes
– Active mode for Temp sensor and EEPROM
– EEPROM in standby or Temp sensor in shutdown
– EEPROM in standby and Temp sensor in shutdown
• Schmitt trigger and noise filtering on bus inputs
• 2-wire Serial Interface: 10-400 kHz I2C™ /SMBus™
• Available Packages: DFN-8, TDFN-8
Temperature Sensor Features
• Temperature Converted to Digital Data
• Sampling Rate of 100ms (max)
• Selectable 0, 1.5°C, 3°C, 6°C Hysteresis
• Programmable Resolution from 0.0625°C to 0.5°C
• Accuracy:
– ±0.5°C/±1°C (typ./max.) from -20°C to +125°C
Serial EEPROM Features
• Permanent and Reversible Software Write Protect
• Software Write Protection for the lower 128 bytes
• Byte and page write (up to 16 bytes)
• Self-time Write cycle
• Automatic address incrementing
• Organized as 1 block of 256 bytes (256x8)
Typical Applications
• DIMM Modules (DDR2, DDR3)
• Servers, Laptops, Ultra-portables, PCs, etc.
• High end audio / video equipment
• Industrial temperature monitors
• Hard Disk Drives and Other PC Peripherals
TSE2002B3C
Data Sheet
Advance Information*
Temperature Sensor with
Integrated EEPROM for Memory
Modules
