Overview
The CBTU02044HEJ is a high-speed differential 1-to-2 switching chip manufactured by NXP USA Inc. This component is optimized for interfacing with PCIe 4.0 and is suitable for both server and client applications. It supports other high-speed interfaces such as PCIe-Gen4, MIPI, DP1.4, and DDR. The chip functions as a 2-to-1 multiplexer, allowing the selection of one output port out of two differential ports. Its design minimizes crosstalk and optimizes signal integrity, making it ideal for high-data-rate applications.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Current (IDD) | XSD = HIGH (disable) | - | 3 | 10 | μA |
| Supply Current (IDD) | XSD = LOW (enable) | - | 250 | 450 | μA |
| Start-up Time | Supply voltage ramping up to valid with XSD = LOW | - | - | 30 | μs |
| Enable Time | XSD going LOW to channel specified operating characteristics | - | 90 | 220 | μs |
| Reconfiguration Time | SEL state changes | - | 18 | 30 | ns |
| Differential Insertion Loss (DDIL) | f = 100 MHz | - | - | 0.56 | dB |
| Differential Return Loss (DDRL) | f = 2.5 GHz | - | - | 21 | dB |
| High-Speed Differential Near-End Crosstalk (DDNEXT) | f = 8 GHz | - | - | -48 | dB |
| Operating Temperature Range | - | -40 | - | 85 | °C |
| Package Type | - | - | - | HUQFN16 | - |
| Package Dimensions | - | - | - | 1.6 mm x 2.4 mm x 0.5 mm | - |
| ESD Protection | - | - | - | 2000 V HBM; 1000 V CDM | - |
Key Features
- Optimized high-speed signal integrity
- Minimized crosstalk to meet stringent PCIe 4.0 requirements
- Two-differential channels 1-to-2 switch and 2-to-1 multiplexer functionality
- All channels support rail-to-rail input voltage (up to 2.4 V)
- Compact HUQFN16 package with 1.6 mm x 2.4 mm x 0.5 mm dimensions and 0.4 mm pitch
- ESD protection: 2000 V HBM; 1000 V CDM
- Operating temperature range: -40 °C to +85 °C
Applications
The CBTU02044HEJ is designed for various high-speed interface applications, including:
- PCIe 4.0 interfaces for servers and clients
- Other high-speed interfaces such as PCIe-Gen4, MIPI, DP1.4, and DDR
- Data centers and cloud computing infrastructure
- High-performance computing systems
- Networking and telecommunications equipment
Q & A
- What is the primary function of the CBTU02044HEJ?
The CBTU02044HEJ is a high-speed differential 1-to-2 switching chip that also functions as a 2-to-1 multiplexer. - What are the supported high-speed interfaces?
The chip supports PCIe 4.0, PCIe-Gen4, MIPI, DP1.4, and DDR interfaces. - What is the package type and dimensions of the CBTU02044HEJ?
The component is packaged in a HUQFN16 package with dimensions of 1.6 mm x 2.4 mm x 0.5 mm and a pitch of 0.4 mm. - What is the operating temperature range of the CBTU02044HEJ?
The operating temperature range is from -40 °C to +85 °C. - What kind of ESD protection does the CBTU02044HEJ offer?
The chip offers ESD protection of 2000 V HBM and 1000 V CDM. - How does the CBTU02044HEJ minimize crosstalk?
The chip is designed to minimize crosstalk to meet stringent PCIe 4.0 requirements, with optimized pinouts and a compact package. - What are the typical supply current values for the CBTU02044HEJ?
The typical supply current values are 250 μA when XSD is LOW (enable) and 3 μA when XSD is HIGH (disable). - What is the start-up time for the CBTU02044HEJ?
The start-up time is up to 30 μs when the supply voltage ramps up to valid with XSD = LOW. - What are the applications of the CBTU02044HEJ?
The chip is used in data centers, cloud computing infrastructure, high-performance computing systems, and networking and telecommunications equipment. - Where can I find detailed specifications for the CBTU02044HEJ?
Detailed specifications can be found in the product data sheet available on NXP's official website and other electronic component distributors like Digi-Key and LCSC Electronics.
