NXP | SE98ATP,547

The NXP Semiconductors SE98A measures temperature from -40 °C and +125 °C with JEDEC Grade B ±1 °C accuracy between +75 °C and +95 °C communicating via the I2C-bus/SMBus. It is typically mounted on a Dual In-Line Memory Module (DIMM) measuring the DRAM temperature in accordance with the new JEDEC (JC-42.4) Mobile Platform Memory Module Thermal Sensor Component specification.

The SE98A thermal sensor operates over the VDD range of 1.7 V to 3.6 V. The SE98A does not include the 2 k SPD and is designed for custom DIMM where larger SPD is required.

The Temp Sensor (TS) consists of an Analog-to-Digital Converter (ADC) that monitors and updates its own temperature readings 8 times per second, converts the reading to a digital data, and latches them into the data temperature registers. User-programmable registers, such as Shutdown or Low-power modes and the specification of temperature event and critical output boundaries, provide flexibility for DIMM temperature-sensing applications.

Features:

• JEDEC (JC-42.4) TS3000B1 DIMM ± 0.5 °C (typ.) between 75 °C and 95 °C temperature sensor
• Optimized for voltage range: 1.7 V to 3.6 V
• Shutdown current: 0.1 µA (typ.) and 5.0 µA (max.)
• 2-wire interface: I2C-bus/SMBus compatible, 0 Hz to 400 kHz
• SMBus ALERT and TIMEOUT (programmable)
• 11-bit ADC Temperature-to-Digital converter with 0.125 °C resolution

Applications:

• DDR2 and DDR3 memory modules
• Laptops, personal computers and servers
• Enterprise networking
• Hard disk drives and other PC peripherals