Home > Applications > Set-top Box Application > IEEE 1394 Fire Wire Port

Set-top Box Application

System View | Block Diagram

Protection Area

Illustration (click to open larger image in new window)

IEEE 1394 FireWire Port Protection

Problem: Overcurrent (in-rush) Limiting

Harmful overcurrent surges can damage the the port circuitry and potentially impair data integrity.

Solution: PolySwitch devices

PolySwitch devices help limit the flow of dangerously high currents during fault conditions and reset back once the fault condition is removed and power is cycled.


	Read more about the Raychem Surface-mount (SMD) PolySwitch device Applicable Product Family: SMD. Download SMD Datasheet - (pdf 1,386KB) Agency Recognition: UL E74889, TÜV R9872049, R9872048, R2172061, CSA 078165_C_000.

	Read more about Radial-leaded PolySwitch devices Applicable Product Series: RTEF, RXEF Download Radial-leaded PolySwitch Datasheet - (pdf 707KB) Agency recognitions: UL E74889, CSA 078165_C_000, TÜV

Problem: Electrostatic Discharge (ESD)

IEEE 1394 FireWire is a high-speed, high-power, hot-plugging environment. As a result of the increase in speed, low capacitance ESD protection of the bus is needed to maintain data integrity between devices in the network.

Solution: PESD

The Raychem PESD device, which is a low capacitance (typically 0.25pF) ESD protection device, is capable of withstanding numerous ESD transients, and is a RoHS & IEC61000-4-2 compliant device having low leakage current and low clamping voltage.