Microchip Technology, Inc. Interface Transceiver IC LE9502BTC

The LE9502BTC from Quarktwin Technology Ltd. is a Ringing Subscriber Line Interface Circuit (RSLIC) designed for short to medium loop applications, supporting approximately 2000 ft. of 26 AWG and 5 REN loads. It is suitable for various applications including Voice over IP, DSL integrated access devices, cable telephony, and fiber-to-the-home solutions. This integrated dual-channel device features a built-in boost switching power supply that tracks line voltage to minimize power dissipation, requiring only +3.3 V and +12 V nominal power supplies. It supports a wide range of input voltages from +8 V to +40 V and is designed to operate with minimal external components. The device is housed in a 44-pin eTQFP package and offers programmability for two-wire AC impedance, dual current limits, and loop closure/ring trip thresholds. The LE9502BTC provides five programmable states, including active, reverse polarity, ringing, standby, and disconnect, allowing for flexible operation. It also includes features for fault detection and supports ringing capabilities of up to 90 Vpk. This product is designed to reduce system complexity and cost while enhancing quality of service, making it a viable option for engineers looking for an efficient RSLIC solution.