NXP Semiconductors CBTL04GP043EXJ

Overview

CBTL04GP043EXJ from NXP Semiconductors is a 4-channel bidirectional differential crossbar switch supporting PCIe Gen3, USB3, DisplayPort, HDMI 1.4, USB 2.0, and UART signals. It features dual 2×2 channel architecture, 8.5 GHz bandwidth at 2.2 V common-mode voltage, 11 Ω typical ON-state resistance, and XFBGA28 package (2.0 × 4.0 × 0.5 mm). It enables dynamic signal routing in high-speed interface consolidation applications such as laptop docking stations and multi-source display hubs.

For engineers reviewing the CBTL04GP043EXJ datasheet, CBTL04GP043EXJ pinout, CBTL04GP043EXJ application, or CBTL04GP043EXJ equivalent, key selection criteria include differential insertion loss (−1.5 dB @ 2.5 GHz), intra-pair skew (5 ps), rail-to-rail input support, low-power sleep mode via XSDN, and compatibility with 2.7–3.5 V supply rails.

Technical Context

The CBTL04GP043EXJ implements a dual 2×2 differential crossbar architecture with CMOS-controlled CROSS and XSDN inputs. CROSS selects straight-through (LOW) or crossed (HIGH) path mapping between Port 0 and Port 1, while XSDN enables normal operation (HIGH) or high-impedance sleep state (LOW), reducing power to 42 µW.

It supports wide common-mode voltage (0 V to VDD) and peak-to-peak differential input up to 1.4 V across all I/O pins, with back-current protection and ESD robustness (2000 V HBM, 750 V CDM). Its 8.5 GHz −3 dB bandwidth and −20 dB return loss at 2.5 GHz ensure integrity for Gen3 PCIe and DisplayPort 1.2a links.

Key Specifications

Pinout & Package

XFBGA28 package: 2.00 mm × 4.00 mm × 0.5 mm body, 0.5 mm ball pitch, 28 solder balls, extremely thin fine-pitch construction. Balls D1–D4, E1–E4, and F2–F3 are n.c. (not internally connected); recommended to connect to solid ground plane for signal integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar differential crossbar switch applications.

Compared with TS3USB30E and PI3DBS16412, the CBTL04GP043EXJ uniquely balances Gen3 PCIe/DP/USB3 support, ultra-compact XFBGA28 packaging, and sub-1 mW active power-making it optimal for space-constrained, multi-protocol interface consolidation where Gen4 is unnecessary.

Availability

CBTL04GP043EXJ is available at Aetrix Electronics and suitable for laptop docking stations, multi-source display hubs, embedded test equipment, and industrial camera interfaces requiring stable component supply and long-term production continuity.

Supply support for CBTL04GP043EXJ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer applications.

The CBTL04GP043EXJ belongs to NXP's high-speed analog switch portfolio, designed specifically for protocol-transparent differential signal routing in USB-C, docking, and display interface consolidation systems.

FAQ

What is the maximum differential signal rate supported by the CBTL04GP043EXJ?

The CBTL04GP043EXJ supports differential signaling up to 8.5 GHz bandwidth (−3 dB point at VIC = 2.2 V), enabling reliable operation with PCIe Gen3 (8 GT/s), DisplayPort 1.2a (5.4 Gbps), and USB3.0 (5 Gbps) without equalization. Measured insertion loss is −1.5 dB at 2.5 GHz and −1 dB at 100 MHz, confirming suitability for multi-gigabit serial links.

How does the CROSS pin configure signal routing in the CBTL04GP043EXJ?

The CROSS pin is a CMOS input that determines path mapping: when LOW, Port 0 pins connect straight-through to corresponding Port 1 pins (A0↔A1, B0↔B1, C0↔C1, D0↔D1); when HIGH, cross-mapping occurs (A0↔B1, B0↔A1, C0↔D1, D0↔C1). The CBTL04GP043EXJ requires CROSS to remain LOW for >500 µs during power-up before toggling.

What power-saving modes does the CBTL04GP043EXJ support?

The CBTL04GP043EXJ supports low-power sleep mode via the XSDN pin: when XSDN is driven LOW, all internal switches enter high-impedance state, reducing supply current to ≤42 µW. In active mode (XSDN = HIGH), typical supply current is 0.5 mA at 3.5 V. No external bias or shutdown sequencing is required beyond asserting XSDN.

Can the CBTL04GP043EXJ handle mixed-signal protocols like HDMI 1.4 and USB 2.0 simultaneously?

Yes-the CBTL04GP043EXJ supports large-swing signals including HDMI 1.4 and USB 2.0 alongside high-speed differential protocols. Its rail-to-rail input voltage range (0 V to VDD) and wide common-mode tolerance (0 V to VDD) allow interoperability with both 3.3 V HDMI sources and 3.3 V USB transceivers on the same device, provided signal swing remains within ±0.7 V differential peak-to-peak limit.

What is the thermal resistance and maximum junction temperature for the CBTL04GP043EXJ?

The CBTL04GP043EXJ has Rth(j-a) = 149 °C/W (JEDEC still air) and Rth(j-c) = 69 °C/W (top cold plate). With max power dissipation of 1.75 mW in active mode and ambient operating range of −20 °C to +85 °C, calculated max junction temperature remains well below 125 °C under typical conditions-ensuring reliable operation without forced cooling.