LCAS ICs are optimized for dV/dt robustness.
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Press Release Summary:
Delivering dV/dt ratings of 1,500 V/µsec (min), CPC769x Series promotes reliability for PSTN switching applications, particularly in harsh environments prone to lightning or surge events, as well as DSLAM applications. Each Line Card Access Switch (LCAS) IC replaces several electromechanical 2-Form-C relays, optimizing density in line card designs. They provide make/break switch functions for battery feed, ringing, line test-out, test-in, and ringing test.
Original Press Release:
Clare Introduces the Most Rugged LCAS IC Family in the Industry
New 3rd Generation CPC769x Series Line Card Access Switch (LCAS) ICs Have Guaranteed 1500V/microsecond dV/dt Ratings for Central Office, Integrated Voice & Data and DSLAM Telephony Applications
Beverly, MA, May 4, 2009 - Clare, Inc., a wholly owned subsidiary of IXYS Corporation (NASDAQ:IXYS) announced the availability of their 3rd generation LCAS IC family. The CPC769x series has the highest guaranteed dV/dt ratings (1500V/microsecond minimum) for all on-chip bidirectional switching power devices. This best-in-class dV/dt robustness rating makes the CPC769x LCAS devices the most reliable solution for Public Switched Telephone Network (PSTN) switching applications, particularly in harsh environments that are prone to lightning or surge events, as well as in Digital Subscriber Line Access Multiplexer (DSLAM) applications.
The dV/dt enhancements for the CPC769x devices are made in Clare's bonded-wafer, silicon-on-insulator, 330V BCDMOS process with trench isolation, which has been used for many years in central office telecom equipment requiring long operational life (20+ years). The integrated LCAS IC in SOIC packaging replaces several electromechanical 2-Form-C relays, enabling higher density line card designs.
The LCAS IC features digitally-controlled high-voltage switching devices used between a Subscriber Line Interface Chip (SLIC) and the PSTN tip/ring line. LCAS provides make/break switch functions for battery feed, ringing, line test-out, test-in, and ringing test. Each high-voltage switch has integrated current-limiting and thermal shutdown, which works in conjunction with a voltage clamp, providing superior protection for the SLIC. The LCAS IC requires only a +5V supply for operation and TTL logic-level inputs for control.
The CPC7695BA, CPC7695BB, CPC7695BC are 10-pole devices, each in a 28-pin SOIC package, providing all telephony functions listed above. The A- and C-suffix versions feature a voltage feedback protection SCR, while the B-suffix version uses clamping diodes. The C version has an additional test monitor state mode. Package option "Z" provides designers with a smaller 20-pin SOIC version for higher density boards.
The CPC7691BA and CPC7691BB are simple 4-pole devices, each in a 16-pin SOIC package, for simple tip and ring line break and ringing injection/return control. The A-suffix version features a voltage feedback protection SCR while the B-suffix version uses clamping diodes.
About Clare and IXYS Corporation
Clare, Inc., a leader in the design and manufacture of solid-state relays and high voltage integrated circuits, is a wholly owned subsidiary of IXYS Corporation. IXYS Corporation develops and markets primarily high performance power semiconductor devices that are used in controlling and converting electrical power efficiently in power systems for the telecommunication internet infrastructure, motor drives, medical systems, Solar energy, Wind energy, electrical generators and transportation. IXYS also serves its markets with a combination of digital and analog integrated circuits, RF power products and power subsystems. Additional information about Clare and IXYS may be found at www.clare.com and www.ixys.com, or by sending an email to info@clare.com.
