UBA1702 – Line interrupter driver and ringer

Part Number : UBA1702

Function : Line interrupter driver and ringer

Manufactures : NXP

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Description :

INTEGRATED CIRCUITS DATA SHEET UBA1702; UBA1702A Line interrupter driver and ringer Product specification Supersedes data of 1996 Jan 09 File under Integrated Circuits, IC03 1997 Sep 29 Philips Semiconductors Product specification Line interrupter driver and ringer FEATURES Speech part • 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 • Three bits ringer volume control • Bridge-tied-load (BTL) output stage for piezo transducer • Fast start-up microcontroller supply. APPLICATIONS Miscellaneous UBA1702; UBA1702A • 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 analog telephone set in close cooperation with a microcontroller and transmission circuit. The UBA1702; 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; UBA1702A, it is possible to have a higher integration level thereby reducing significantly the number of discrete components in a telephone set. ORDERING INFORMATION PACKAGE TYPE NUMBER NAME UBA1702 UBA1702A UBA1702T UBA1702AT DIP28 DIP28 SO28 SO28 DESCRIPTION plastic dual in-line package; 28 leads (600 mil) plastic dual in-line package; 28 leads (600 mil) plastic small outline package; 28 leads; body width 7.5 mm plastic small outline package; 28 leads; body width 7.5 mm VERSION SOT117-1 SOT117-1 SOT136-1 SOT136-1 1997 Sep 29 2 Philips Semiconductors Product specification Line interrupter driver and ringer UBA1702; UBA1702A QUICK REFERENCE DATA Speech part: lline = 20 mA; DPI = LOW; Tamb = 25 °C; VEE = 0 V; unless otherwise specified. Ringer part: Vline(rms) = 45 V; f = 25 Hz; using an RC combination of 2.2 kΩ and 820 nF and a diode bridge between the line and the RPI input. SYMBOL Speech part SWITCH DRIVER AND REFERENCES (PINS SDI, SDO, EHI AND DPI); UBA1702A ONLY RSDO RSDI-SDO RSDI VSPO(M) VSPO(Z) resistance between pins SDO and VEE resistance between pins SDI and SDO VSDI − VSDO < 12 V resistance between pins SDI and VEE adjustable mute voltage referenced to VEE VSDI = 240 V; DPI = HIGH MSI = HIGH; MSA open-cir [...]

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UBA1702 Datasheet


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