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General description

CBTU02044 is a high-speed differential 1-to-2 switching chip optimized to interface

with PCIe4.0 for server and client applications. This high performance switch chip could

be used for other high-speed interfaces such as PCIe-Gen4, MIPI, DP1.4, and DDR.

CBTU02044 also functions as a 2-to-1 MUX by selecting 1 (Port A) as output out of one

of the two differential ports (either Port B or C).

Pinouts are optimized for minimum number of layout layers and for achievement of very

low crosstalk to meet stringent crosstalk requirements at higher data rate. CBTU02044 is

a small package with optimized footprint for smaller real estate occupancy.

CBTU02044 is available in 1.6 mm x 2.4 mm x 0.5 mm HUQFN16 package with 0.4 mm

pitch.

Features and benefits

? Optimized high-speed signal integrity

? Minimize crosstalk to meet stringent PCIe4.0 requirement

? Two-differential channels 1-to-2 switch/2-to-1 mux

– Low insertion loss (typ): 0.56 dB at 100 MHz; 1.1 dB at 5 GHz; 1.5 dB at 8 GHz

– Low off-state isolation: -70 dB at 100 MHz, -23 dB at 5 GHz, -18 dB at 8 GHz

– Low return loss (typ): 21 dB at 2.5 GHz; 18 dB at 5 GHz; 15 dB at 8 GHz

– Low ON-state resistance: 10 Ω (typ)

– 3 dB bandwidth (typ): 17 GHz (typ)

– DDNEXT < -50 dB @ 8 GHz

– DDFEXT < -48 dB @ 8 GHz

– VIC common mode input voltage VIC: 0 V to 2 V

– Differential input voltage VID <1.6 V

– Intra-pair skew <4 ps

? VDD power supply voltage range: 1.62 V to 3.63 V

? Low current consumption:

– For active mode = 200 μA (typ)

– For power-saving = 3 μA (typ)

? CMOS SEL and XSD pins

? Back current protection on all I/O pins of these switches

? Patent pending high performance analog pass-gate technology

? All channels support rail-to-rail input voltage (up to 2.4 V)

? HUQFN16 1.6 mm × 2.4 mm × 0.5 mm package with 0.4 mm pitch

? ESD: 2000 V HBM; 1000 V CDM

? Operating temperature range: -40 °C to +85 °C