SE98APW: DDR memory module temp sensor, 1.7 V to 3.6 V
The NXP® Semiconductors SE98A measures temperature from -40 ºC and +125 ºC with JEDEC Grade B ±1 ºC accuracy between +75 ºC and +95 ºC 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 Componentspecification.
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.
When the temperature changes beyond the specified boundary limits, the SE98A outputs an EVENT signal using an open-drain output that can be pulled up between 0.9 V and 3.6 V. The user has the option of setting the EVENT output signal 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 EVENT output can even be configured as a critical temperature output.
The SE98A supports the industry-standard 2-wire I²C-bus/SMBus serial interface. The SMBus TIMEOUT function is supported to prevent system lock-ups. Manufacturer and Device ID registers provide the ability to confirm the identify of the device. Three address pins allow up to eight devices to be controlled on a single bus.
The SE98A is an improved SE98 and is comparable to the thermal sensor in the SE97 but with voltage range of 1.7 V to 3.6 V.
SE98APW: Product Block Diagram
sot530-1_3d
Data Sheets (1)
Application Notes (2)
Users Guides (3)
Brochures (1)
Package Information (1)
Ordering Information
| Product | Status | Package version | Remarks | Standby current (uA) | Operating Temperature (Cel) | I2C-bus controlled | Part type | Accuracy on-chip (±°C) | Operating voltage (VDC) | Assignable addresses | SMBus clock (kHz) | Accuracy remote (±°C) |
|---|
| SE98APW | End of Life | SOT530-1 | | 5 | -20~125 | 3.0~3.6 | | 2@-75~95?3@40~125 | 3.0~3.6 | 8 | 400 | |
Package Information
| Product ID | Package Description | Outline Version | Reflow/Wave Soldering | Packing | Product Status | Part NumberOrdering code(12NC) | Marking | Chemical Content | RoHS / Pb Free / RHF | LeadFree Conversion Date | MSL | MSL LF |
|---|
| SE98APW | | SOT530-1 | | Reel 13" Q1/T1 | Withdrawn | SE98APW,118
(9352 887 95118) | S98A | |    | Always Pb-free | 1 | 1 |
