STTS2002 2.3 V memory module temperature sensor with a 2 Kb SPD EEPROM Features 2.3 V memory module temperature sensor with integrated 2 Kb SPD EEPROM Forward compatible with JEDEC TSE 2002a2 and backward compatible with STTS424E02 Operating temperature range: 40 C to +125 C TDFN8 Single supply voltage: 2.3 V to 3.6 V 2 mm x 3 mm 2 mm x 3 mm TDFN8, height: 0.80 mm (max) (max height 0.80 mm) JEDEC MO-229, WCED-3 compliant RoHS compliant, halogen-free 2 Kb SPD EEPROM Temperature sensor Functionality identical to STs M34E02 SPD Temperature sensor resolution: EEPROM programmable (9-12 bits) 0.25 C (typ)/LSB - (10-bit) default Permanent and reversible software data protection for the lower 128 bytes Temperature sensor accuracy (max): 1 C from +75 C to +95 C Byte and page write (up to 16 bytes) 2 C from +40 C to +125 C Self-time WRITE cycle (5 ms, max) 3 C from 40 C to +125 C Automatic address incrementing ADC conversion time: 125 ms (max) at default resolution (10-bit) Two-wire bus Typical operating supply current: 160 A 2 Two-wire SMBus/I C - compatible serial (EEPROM standby) interface Temperature hysteresis selectable set points Supports up to 400 kHz transfer rate from: 0, 1.5, 3, 6.0 C Does not initiate clock stretching Supports SMBus timeout 25 ms - 35 ms March 2011 Doc ID 15389 Rev 5 1/52 www.st.com 1Contents STTS2002 Contents 1 Description . 6 2 Serial communications . 7 2.1 Device type identifier (DTI) code 7 2.2 Pin descriptions 10 2.2.1 A0, A1, A2 . 10 2.2.2 V (ground) . 10 SS 2.2.3 SDA (open drain) 10 2.2.4 SCL 10 2.2.5 EVENT (open drain) . 10 2.2.6 V (power) 10 DD 3 Temperature sensor operation 11 2 3.1 SMBus/I C communications . 11 2 3.2 SMBus/I C slave sub-address decoding . 13 2 3.3 SMBus/I C AC timing consideration . 14 4 Temperature sensor registers 16 4.1 Capability register (read-only) . 17 4.2 Configuration register (read/write) 19 4.2.1 Event thresholds 19 4.2.2 Interrupt mode . 19 4.2.3 Comparator mode . 19 4.2.4 Shutdown mode . 19 4.2.5 Event output pin functionality . 22 4.3 Temperature register (read-only) . 24 4.3.1 Temperature format 24 4.4 Temperature trip point registers (read/write) 25 4.4.1 Alarm window trip . 26 4.4.2 Critical trip . 26 4.5 Manufacturer ID register (read-only) 28 4.6 Device ID and device revision ID register (read-only) . 28 4.7 Temperature resolution register (read/write) 29 2/52 Doc ID 15389 Rev 5