CBTU4411EE,551

Signal Switches, Multiplexers, Decoders Overview

The CBTU4411EE,551 is an 11-bit bus switch and multiplexer designed for 1.7 V to 1.9 V VDD operation with SSTL_18 select input levels. It features a 12 Ω nominal ON-resistance and supports DDR2 data buses from 400 Mbit/s to 800 Mbit/s. The device connects each of the 11 Host ports to one of four DIMM ports via a decoder driven by S0, S1, and EN pins. Channel 10 can be configured as a differential strobe signal. It operates within a temperature range of 0 °C to +85 °C.

Signal Switches, Multiplexers, Decoders Feature Summary

• Optimized for Double Data Rate 2 (DDR2) SDRAM applications
• SSTL_18 compatible enable and select signals
• Configurable differential strobe support on channel 10
• Low crosstalk and controlled skew design

Signal Switches, Multiplexers, Decoders Applications

• DDR2 SDRAM memory systems
• Host-to-DIMM data bus switching
• Differential strobe signal routing

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to ensure compatibility with required package variants and environmental specifications. Confirm that the component status aligns with long-term availability requirements for the intended production cycle.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when designing DDR2 memory interfaces requiring low ON-resistance and precise switching control. Ensure the system provides the necessary VREF voltage for SSTL_18 inputs and that the operating temperature falls within the specified industrial range.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the CBTU44 series of bus switches manufactured by NXP USA Inc. It utilizes a 72-ball LFBGA package. The device integrates internal pull-down resistors and selectable termination for its select inputs to simplify board layout and improve signal integrity in high-speed memory designs.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Consult official NXP documentation for verified substitute part numbers. Ensure any replacement maintains the same pinout, electrical characteristics, and package dimensions to guarantee functional equivalence without redesigning the host circuit.