DDR Memory Module Temp Sensor with Integrated SPD

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Block Diagram

SE97B -BD

SE97B  Block Diagram

Features

General Features

  • JEDEC (JC-42.4) DIMM temperature sensor plus 256-byte serial EEPROM for Serial Presence Detect (SPD)
  • SDA open-drain output design for operation in distributed multi-point applications
  • Shutdown current: 0.1 µA (typ.) and 5.0 µA (max.)
  • Power-on reset: 1.8 V (typ.)
  • 2-wire interface: I2C-bus/SMBus compatible, 0 Hz to 400 kHz
  • SMBus Alert Response Address and TIMEOUT 25 ms to 35 ms (programmable)
  • ESD protection exceeds 2500 V HBM per JESD22-A114, 250 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101
  • Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
  • Available in HWSON8 package

Temperature Sensor Features

  • 11-bit ADC Temperature-to-Digital converter with 0.125 °C resolution
  • Voltage range: 3.0 V to 3.6 V
  • Operating current: 250 µA (typ.) and 400 µA (max.)
  • Programmable hysteresis threshold: off, 0 °C, 1.5 °C, 3 °C, 6 °C
  • Over/under/critical temperature EVENT output
  • B-grade accuracy:
    • ±0.5 °C/±1 °C (typ./max.) ? +75 °C to +95 °C
    • ±1.0 °C/±2 °C (typ./max.) ? +40 °C to +125 °C
    • ±2.0 °C/±3 °C (typ./max.) ? -40 °C to +125 °C

Serial EEPROM Features

  • Read and write voltage range: 3.0 V to 3.6 V
  • Operating current:
    • Write → 0.6 mA (typ.) for 3.5 ms (typ.)
    • Read → 100 µA (typ.)
  • Organized as 1 block of 256 bytes (256 × 8)
  • 100,000 write/erase cycles and 10 years of data retention
  • Permanent and Reversible Software Write Protect
  • Software Write Protection for the lower 128 bytes

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