Clare Offers 415V N-Channel Depletion-Mode FET

Clare, Inc., an IXYS company, announced the immediate availability of the CPC5603C N-channel depletion mode MOSFET. The new device is designed for use as a hook switch and linear regulator for Litelink™ III phone line interface applications. The CPC5603C device provides an increased drain-to-source breakdown voltage of 415V that is suited for ITU-T K.21 enhanced level power contact testing as compared to the standard 350V CPC5602C MOSFET device. Meant to simulate ac power lines crossing telephone lines, the enhanced level power contact is a survival test that subjects the phone application circuit to 15 minutes of a 230Vrms source. The CPC5603C eliminates the need for PTC protection devices on the tip-ring input of the phone line.

Mark Heisig, Clare's General Manager, said, "The CPC5603C MOSFET for Litelink applications survives enhanced level power contact testing and saves the customer additional bill-of-material (BOM) costs. Robustness and price savings are critical for OEMs given the high deployment of enterprise and consumer VoIP products with a public switch telephone network (PSTN) interface."

Litelink phone line interface ICs are used as data access arrangements (DAA) for various telephony and modem applications. Currently, Litelink ICs have been designed-in extensively into foreign exchange office (FXO) port applications for voice over internet protocol (VoIP) gateways and IP-PBXs. FXOs enable the convergence of network and PSTN connections offering the user maximum flexibility with existing telephony and networking hardware.

The CPC5603C N-channel depletion mode device utilizes Clare's third generation vertical DMOS process, offering high voltage MOSFET performance in a silicon gate process. The higher breakdown voltage coupled with low on resistance and low gate-to-source threshold voltage provides a linear regulator well suited for the internal Litelink voltage reference as well as telephone hook switch control.

The CPC5603C N-channel depletion mode MOSFET device is now available in sample and production quantities. For OEM quantities of 10,000 units, the device is $0.36 with standard lead-time of six weeks after receipt of order.