Description
Atmel® AT30TSE002B is a combination Serial EEPROM and temperature sensor device containing 2048-bits of Serially Electrically Erasable and Programmable Read-Only Memory (EEPROM) organized as 256-bytes of eight bits each and could be used to store memory module and vendor information. The EEPROM operation is tailored specifically for DRAM Memory Modules Serial Presence Detect (SPD). The first 128-bytes of the memory incorporate a permanent and a reversible software Write Protection (WP) feature. Once the permanent software WP is enabled, by sending a special command, it cannot be reversed. However, once the reversible software WP is enabled, it can be reversed by sending a special command.

FEATUREs
● Integrated Temperature Sensor (TS) + 2-Kbit Serial EEPROM
● JEDEC (JC42.4) SO-DIMM SPD + TS compliant
● Standard voltage operation
   ● Optimized for voltage range: 2.7V to 3.6V
● 100khz and 400khz compatibility
● 2-wire serial interface: I2C/SMBus™ compatible
   ● SMBus Timeout supported
● Schmitt Trigger, filtered inputs for noise suppression
● Industry standard green (Pb/Halide-free/RoHS compliant) package options
   ● 8-lead Very Very Thin DFN (2 x 3 x 0.8mm)

Serial EEPROM Features
● Permanent and reversible software write protection for the first-half of the array
   ● Software procedure to verify write protect status
● Internally organized as one block of 256-bytes (256 x 8)
● Supports byte and page write operation
   ● Write 1, 2, 3, and up to 16 bytes at a time
● Self-timed write cycle (5ms max)
● High-reliability
   ● Endurance: 1 million write cycles
   ● Data retention: 100 years
● Low operating current
   ● EEPROM write ~1.5mA (typical)
   ● EEPROM read ~ 0.2mA (typical)

Temperature Sensor Features
● 11-bit ADC temp-to-digital converter with 0.125°C resolution
● Programmable hysteresis threshold: off, 0°C, 1.5°C, 3°C, and 6 °C
● B-grade accuracy
   ● ±1°C (max.) for +75°C to +95°C
   ● ±2°C (max.) for +40°C to +125°C
   ● ±3°C (max.) for -20°C to +125°C
● Low operating current
   ● Temperature sensor active ~ 0.2mA (typical)