Signal switch ICs, clock generators and clock buffers chase 20Gbps protocols
Signal switches, clock generators and clock buffers for PCI Express (PCIe) 4.0 technology applications are now available from Diodes Incorporated
Addressing the expanding market for signal routing with different protocols in PCs, servers, embedded applications including artificial intelligence and fast data transfer generally, the PI3DBS16212 and PI3DBS16412 are 1-20Gbps 2-channel and 4-channel 2:1 differential multiplexers/demultiplexers with low loss, reflection, crosstalk and skew.
Offering greater flexibility of channels and routing, typical applications include switching high-speed serial signals employing the latest protocols, including: 20Gbps ThunderboltTM 3; 16Gbps PCIe 4.0 architecture; 10Gbps USB3.1 Gen2; 12Gbps Serial Attached SCSI 3 (SAS3); 8.1Gbps Display Port 4 (DP4); 12Gbps HDMI2.1, and 10Gbps Ethernet standards.
For the emerging PCIe 4.0 applications, the company says the PI3DBS16212 and PI3DBS16412 offer excellent signal integrity with an insertion loss of -1.3dB at 16Gbps. In this application, minimal skew between channels eases the timing budget between nodes, and power dissipation is low at typically 300-microA. The parts are fabricated with silicon on insulator (SOI) technology and have a small profile package at 2mm x 2mm for the 2:1 multiplexer.
Also driven by the adoption of the new PCIe 4.0 standard, the PI6CG18201, PI6CG18401, PI6CG18801, PI6CG15401 clock generators provide 1.8V 2/4/8 HCSL outputs and 1.5V 4 HCSL outputs, respectively, and use Diodes Incorporated’s proprietary phase-locked loop design to achieve the required tight jitter performance of less than 0.5ps.
The parts also provide the reference clock for SERDES chipsets supporting the PCIe 4.0 interface. Each output has its own enable with programmable slew rate and amplitude. On-chip termination resistors are incorporated saving up to 32 external resistors for the 8-channel version for space-constrained applications with the parts consuming about 85 per cent less power than traditional PCIe clocks. A spread-spectrum option is also available to reduce EMI in sensitive applications.
PI6CB18200, PI6CB18401, PI6CB18601, and PI6CB18801 are PCIe 4.0 2/4/6/8 HCSL output clock buffers fanned-out from a reference input. Like the clock generators, the slew rate and amplitude of each output is programmable and there are individual output enables for better power management. Additive jitter for the clock buffers is less than 0.05ps.