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CBTU0808 Datasheet

Dual lane PCI Express port multiplexer

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CBTU0808
Dual lane PCI Express port multiplexer
Rev. 01 — 2 June 2006
Product data sheet
1. General description
The CBTU0808 is a dual lane port multiplexer designed to provide convenient and reliable
path switching for PCI Express signals. It is organized as two PCI Express lanes, each
consisting of a Transmit and Receive channel. Each channel has four ports, two (A and B)
on the source (or host) side and two (A and B) on the destination (or device) side. Each
port provides a pair of signal lines to support PCIe differential signaling.
Using specially designed high-bandwidth and high off-isolation switch elements, source
and destination ports can be connected or isolated in three possible configurations:
source A and B to destinations A and B respectively; or source A to destination B
(remaining ports isolated), or all ports isolated.
The switch elements are controlled by internal control logic to set switch positions in
accordance with these three configurations, selectable by CMOS inputs CTRL0 and
CTRL1 for lanes 0 and 1 respectively. Within a lane, the switch configuration is always
applied identically to both transmit and receive channels.
The CBTU0808 is packaged in a 48-ball, depopulated 9 × 9 grid, 0.5 mm ball pitch, thin
profile fine-pitch ball grid array (TFBGA) package, which (while requiring a minimum
5 mm × 5 mm of board space) allows for adequate signal routing and escape using
conventional board technology.
2. Features
I 2-lane wide PCI Express port multiplexer
I One transmit and one receive differential channel per lane
I Four ports per channel
I PCI Express signaling compliant
I High bandwidth: > 1 GHz
I Low OFF-feedthrough of < 35 dB at 1.25 GHz
I Low channel crosstalk of < 35 dB at 1.25 GHz
I Designed to match characteristic impedance of PCIe signaling environment
I Single 1.8 V supply operation
I ESD resilience of 2 kV HBM
I Available in 48-ball, 5 mm × 5 mm, 0.5 mm ball pitch TFBGA package, Pb-free/Green
3. Applications
I High-performance computing applications
I Port switching and docking applications


NXP Semiconductors Electronic Components Datasheet

CBTU0808 Datasheet

Dual lane PCI Express port multiplexer

No Preview Available !

Philips Semiconductors
CBTU0808
Dual lane PCI Express port multiplexer
4. Ordering information
Table 1. Ordering information
Type number Solder process
CBTU0808EE/G Pb-free (SnAgCu solder ball
compound)
Package
Name
TFBGA48
Description
plastic thin fine-pitch ball grid array package;
48 balls; body 5 × 5 × 0.8 mm
Version
SOT918-1
5. Functional diagram
CTRL[1:0]
TEST[1:0]
TXSA0P
TXSA0N
channel Tx0
TXSB0P
TXSB0N
RXSA0P
RXSA0N
channel Rx0
RXSB0P
RXSB0N
TXSA1P
TXSA1N
channel Tx1
TXSB1P
TXSB1N
RXSA1P
RXSA1N
channel Rx1
RXSB1P
RXSB1N
Fig 1. Functional diagram
CBTU0808
CONTROL AND CONFIGURATION
LANE 0
LANE 1
TXDA0P
TXDA0N
TXDB0P
TXDB0N
RXDA0P
RXDA0N
RXDB0P
RXDB0N
TXDA1P
TXDA1N
TXDB1P
TXDB1N
RXDA1P
RXDA1N
RXDB1P
RXDB1N
002aac139
CBTU0808_1
Product data sheet
Rev. 01 — 2 June 2006
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
2 of 16


Part Number CBTU0808
Description Dual lane PCI Express port multiplexer
Maker NXP
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