|
NXP Semiconductors |
INTEGRATED CIRCUITS
DATA SHEET
UBA1707
Cordless telephone, answering
machine line interface
Product specification
Supersedes data of 1998 Jun 11
File under Integrated Circuits, IC03
1999 Feb 17
Philips Semiconductors
Cordless telephone, answering machine
line interface
Product specification
UBA1707
FEATURES
Line interface
• Low DC line voltage; operates down to 1.2 V (excluding
polarity guard)
• Voltage regulator with adjustable DC voltage
• DC mask for voltage or current regulation (CTR 21)
• Line current limitation for protection
• Electronic hook switch control input
• Transmit amplifier with:
– Symmetrical inputs
– Fixed gain
– Large signals handling capability.
• Receive amplifier with fixed gain
• Transmit and receive amplifiers AGC for line loss
compensation.
• AGC:
– On/off
– Slope
– Istart line current.
• Auxiliary amplifier mute function
• Loudspeaker channel:
– Input selection
– Volume setting
– Dynamic limiter inhibition
– Power-down mode.
• General purpose switches state
• Global power-down mode.
Supply
Operates with external supply voltage from 3.0 to 5.5 V.
Auxiliary amplifier
• Fixed gain.
Loudspeaker channel
• Dual inputs
• Rail-to-rail output stage for single-ended load drive
• High output current capability
• Dynamic limiter to prevent distortion
• Digital volume control
• Fixed maximum gain.
General purpose switches
• Three switches with open-collector.
3-wires serial bus interface
Allows to control:
• DC mask (voltage or current regulation)
• Receive amplifier mute function
APPLICATIONS
• Cordless base stations
• Answering machines
• Mains or battery-powered telephone sets.
GENERAL DESCRIPTION
The UBA1707 is a BiCMOS integrated circuit intended for
use in mains-powered telecom terminals. It performs all
speech and line interface functions, DC mask for voltage
or current regulation and electronic hook switch control.
The device includes an auxiliary amplifier, a loudspeaker
channel and general purpose switches.
Most of the characteristics are programmable via a 3-wire
serial bus interface.
ORDERING INFORMATION
TYPE
NUMBER
UBA1707T
UBA1707TS
PACKAGE
NAME
DESCRIPTION
SO28 plastic small outline package; 28 leads; body width 7.5 mm
SSOP28 plastic shrink small outline package; 28 leads; body width 5.3 mm
VERSION
SOT136-1
SOT341-1
1999 Feb 17
2
|