11-Bit DDR2 SDRAM MUX/Bus Switch with 12 Ω on Resistance

CBTU4411EE

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Block Diagram

CBTU4411 Block Diagram

CBTU4411 Block Diagram

Features

  • Enable (EN) and select signals (S0, S1) are SSTL_18 compatible
  • Optimized for use in Double Data Rate 2 (DDR2) SDRAM applications
  • Suitable to be used with 400 Mbit/s to 800 Mbit/s, 200 MHz to 400 MHz DDR2 data bus
  • Switch ON-resistance is designed to eliminate the need for series resistor to DDR2 SDRAM
  • 12 Ω ON-resistance
  • Controlled enable/disable times support fast bus turnaround
  • Pseudo-differential select inputs support accurate and low-skew control of switching times
  • Selectable built-in termination resistors on the Sn inputs
  • Internal 400 Ω pull-down resistors on xDPn port
  • VBIAS input for optimal DIMM-port pull-down when disabled
  • Configurable to support differential strobe with pull-up to 3/4 of VDD on channel 10 when idle
  • Low differential skew
  • Matched rise/fall slew rate
  • Low crosstalk data-data/data-DQM
  • Simplified 1 : 4 switch position control by 2-bit encoded input
  • Single input pin puts all bus switches in OFF (high-impedance) position
  • Latch-up protection exceeds 500 mA per JESD78
  • ESD protection exceeds 1500 V HBM per JESD22-A114 and 750 V CDM per JESD22-C101

Design Resources

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