UBA2051 Description
INTEGRATED CIRCUITS DATA SHEET UBA2050(A); UBA2051(A;C) One-chip telephone ICs with speech, dialler and ringer functions Product specification Supersedes data of 1998 Mar 24 File under Integrated Circuits, IC03 2000 May 19 Philips Semiconductors Product specification One-chip telephone ICs with speech, dialler and ringer functions.
UBA2051 Key Features
- Low DC line voltage; operates down to 1.45 V (excluding voltage drop over external polarity guard)
- Line voltage regulator with adjustable DC voltage
- Speech mode
- Ringer mode
- Trickle mode
- Unregulated supply (VCC) for the transmission part and peripherals
- Microphone amplifier with symmetrical high-impedance inputs
- DTMF input with confidence tone on receive output
- Receive amplifier with asymmetrical output
- Earpiece amplifier with adjustable gain (and gain boost facility) for all types of earpieces