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ON Semi's latest protection device line up

15 Oct 2012

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ON Semiconductor has rolled out a range of components that according to the company strengthens its portfolio of products that address Peripheral Component Interconnect Express (PCIe) applications in communications systems such as routers, servers, networking equipment and ATE. The devices include the NB3N1XXK family of differential clock and data fanout buffers, the NCN3411 4-channel and NCN3612B 6-channel differential switches, and the ESD7004 and ESD7008 transient voltage suppressors.

The NB3N106K, NB3N108K, NB3N111K and NB3N121K differential fanout clock and data drivers provide a choice of 6, 8, 10 or 21 outputs and are ideal for systems requiring multiple copies of high precision, low phase noise clocks. Typical additive phase jitter of just 0.1ps rms (integrated over 12kHz to 20MHz), and low output-to-output skew of 100ps (max) enables the use of these high performance fan-out buffers in PCIe generation I, II and III compliant applications. Device inputs can directly accept single-ended or differential LVPECL, LVDS and HCSL signals, enhancing flexibility by allowing system designers to easily interface to multiple input signalling schemes. Furthermore, a complete clock tree can be realised with the PCIe clock synthesisers NB3N3002 and NB3N5573 to provide a clock source to the NB3N1XXK fan-out buffers, detailed the company.

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Figure 1: NB3N3002 and NB3N5573 PCIe clock synthesisers.

The NCN3411 and NCN3612B differential switches are designed for use in PCIe 3.0 applications and support data rates of up to 8Gb/s. The devices have low supply current requirements of 200µA and 250µA respectively that also help reduce heat dissipation. The single-pole, double throw (SPDT) NCN3411 offers four differential channels allowing it to handle up to two PCIe lanes, enabling a single controller to manage two PCIe slots. The NCN3612B meanwhile is compatible with Display Port 1.2 and PCIe 3.0 allowing switching between both data types, noted ON Semi.

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Figure 2: NCN3411 and NCN3612B differential switches.

Protection of sensitive high-speed data lines from electrostatic discharge (ESD) is an important consideration in PCIe applications. ON Semiconductor's unidirectional 4-channel ESD7004 and integrated 4-pair (8 line) ESD7008 are low capacitance, low clamping voltage ESD protection diodes that provide ideal PCIe protection solutions. A flow-through style package simplifies PCB layout and the matching of trace lengths necessary to maintain consistent impedance.

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Figure 3: ESD7004 transient voltage suppressor.

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