onsemi CAT34TS02VP2GT4A

The CAT34TS02 combines a JC42.4-compliant temperature sensor (TS) with a 2 Kb serial presence detect (SPD) EEPROM. The temperature sensor measures temperature at least 10 times per second. A host can retrieve temperature readings via the serial interface and compare them against high, low, and critical trip limits stored in internal registers. Conditions exceeding or falling below the limits can be signaled through an open-drain EVENT pin. The integrated 2 Kb SPD EEPROM is internally organized as 16 pages of 16 bytes each, totaling 256 bytes. It features a 16-byte page write buffer and supports standard (100 kHz) and fast (400 kHz) I²C protocols. Write operations to the lower half of memory can be disabled via software command. The CAT34TS02 provides both permanent and reversible software write protection as defined for DDR3 DIMMs.

• Temperature sensor compliant with JEDEC JC42.4
• Temperature range: -40°C to +125°C
• SPD EEPROM compliant with DDR3 DIMM standard
• Supply voltage: 3.3V ± 10%
• I²C / SMBus interface
• Schmitt trigger and noise suppression filter on SCL and SDA inputs
• Low-power CMOS technology
• RoHS-compliant 2×3×0.75 mm TDFN package