PCI Express channel switches

Introduction
Uses
Features

Products
Support
More Info

Introduction

For PCI Express applications that require dynamic allocation of PCI Express lanes, NXP Semiconductors offers our CBTU0808 PCI Express channel switch. Available in a small 5 x 5 mm TFBGA-48 package, the CBTU0808 has optimized pinning for easy printed circuit board layout. While the CBTU0808 provides high bandwidth, it also has a low latency and preserves signal integrity.

Uses

The CBTU0808 can switch two PCI Express lanes to one of two PCI Express connector slots. For example, a x16 PCI Express slot on a motherboard can be re-configured as two x8 PCI Express slots by using four CBTU0808 channel switches. In a notebook computer, the CBTU0808 can switch the PCI Express chipset between the notebook computer and a docking station.

Features

2-lane wide PCI-Express port multiplexer
1 transmit, 1 receive differential channel per lane
4 ports per channel
Two switch positions:
- A to A and B to B
- A to B
PCI Express signaling compliant
>1GHz bandwidth
Optimized switch-on resistance and capicitance
- 10Ω built-in series termination
Low off-feed-through of <-35dB at 1.25GHz
Low channel crosstalk of <-35dB at 1.25GHz
Tightly controlled skew
1.8V Supply operation
>2kV HBM ESD
Ambient (free air) operating temperature of 0 to 85 °C
TFBGA-48 (5 x 5 mm, 0.5mm pitch), lead-free package