UBA1702 Description
UBA1702A performs the high voltage interface and ringer functions of the corded analog telephone set in close cooperation with a microcontroller and transmission circuit. UBA1702A incorporates several protections, a driver for the line interrupter and a ringer. Because of the practical division of functions between the microcontroller, the transmission circuit and the UBA1702;.
UBA1702 Key Features
- Driver for the line interrupter that can be either a PMOST when UBA1702 is used or a PNP when UBA1702A is used
- Adjustable over-current protection
- Adjustable over-voltage protection for transmission circuit
- Adjustable mute (dialling mode voltage; DMO or NSA)
- Adjustable current loop detection (hook switch status)
- Microcontroller supply
- Provision for electronic hook switch. Ringer part
- Over-voltage protection
- Ringer frequency output for frequency discrimination
- Adjustable ringer threshold for piezo-driver enable
UBA1702 Applications
- Separated ground pins for transmission circuit interface and control signals (e.g. for TEA1064A)
- Possibility to supply the microcontroller with an external voltage source
- Telephone sets with software controlled ringer function
- Telephone sets with electronic hook switch. GENERAL DESCRIPTION The UBA1702; UBA1702A performs the high voltage interface and ringer functions of the corded ana