AT30TSE004A-MAA5M-T

The Microchip AT30TSE004A is a combination Serial EEPROM and temperature sensor device containing 4096-bits of Serially Electrically Erasable and Programmable Read-Only Memory (EEPROM) organized as 512-bytesof eight bits each. The Serial EEPROM operation is tailored specifically for DRAM memory modules with SerialPresence Detect (SPD) to store a module’s vital product data such as the module’s size, speed, voltage, datawidth, and timing parameters. The AT30TSE004A is protocol compatible with the legacy JEDEC TSE2002av specification (2-Kbit) devicesenabling the AT30TSE004A to be utilized in legacy applications without any software changes. The SerialEEPROM deploys special software commands to allow users to identify and set which half of the memory theinternal address counter is located. This special addressing method used to select the upper or lower halfof the Serial EEPROM is the key to the legacy compatibility; however, there is one minor exception to the legacycompatibility as the AT30TSE004A does not support the Permanent Write Protection feature because it wasremoved from the JEDEC TSE2004a (DDR4) specification. In addition, the Serial EEPROM incorporates a Reversible Software Write Protection (RSWP) feature enablingthe ability to selectively write protect any or all of the four 128-byte quadrants. Once the RSWP is set, it can onlybe reversed by sending a special software command sequence. The integrated temperature sensor converts temperatures from -20?C to +125?C to a digital word and providesan accuracy of ±1°C (max.) in the temperature range +75?C to +95?C. The temperature sensor continuouslymonitors temperature and updates the data in the Temperature Register at least eight times per second. Thetemperature data is latched internally by the device and may be read by software via a bus Master at anytime(even when the Serial EEPROM is busy writing data to the memory). The AT30TSE004A incorporates flexible user programmable internal registers to

• Integrated Temperature Sensor (TS) + 4-Kbit Serial EEPROM
• JEDEC JC42.4 (TSE2004av) DIMM Serial Presence Detect (SPD) + TS compliant
• Low voltage operation
  • Optimized for VCC range of 1.7V to 3.6V
• 2-wire serial interface: I2 C Fast Mode Plus (FM+) compatible
  • 100kHz, 400kHz, and 1MHz compatibility
  • Bus Timeout supported
• Schmitt Trigger, filtered inputs for noise suppression
• Industry standard green (Pb/Halide-free/RoHS compliant) package options
  • 8-pad Ultra Thin DFN (2 x 3 x 0.6mm)
  • 8-pad Very Very Thin DFN (2 x 3 x 0.8mm)
• Temperature Sensor Features
• Highly accurate B-grade temp. measurements requiring no external components
  • ±1.0°C accuracy (maximum) over the +75°C to +95°C range
  • ±2.0°C accuracy (maximum) over the +40°C to +125°C range
  • ±3.0°C accuracy (maximum) over the -20°C to +125°C range
• 11-bit ADC temperature-to-di