tea1094t NXP Semiconductors, tea1094t Datasheet - Page 2

• Manufacturer Part Number: tea1094t
• Description: Hands Free Ic
• Manufacturer: NXP Semiconductors

Philips Semiconductors
FEATURES
ORDERING INFORMATION
1996 Jul 15
TEA1094
TEA1094A
TEA1094T
TEA1094AT
TEA1094AM
TYPE NUMBER
Low power consumption
Power-down function (TEA1094A only)
Microphone channel with:
– externally adjustable gain
– microphone mute function.
Loudspeaker channel with:
– externally adjustable gain
– dynamic limiter to prevent distortion
– rail-to-rail output stage for single-ended load drive
– logarithmic volume control via linear potentiometer
– loudspeaker mute function.
Duplex controller consisting of:
– signal envelope and noise envelope monitors for both
– decision logic with:
– voice switch control with:
Hands free IC
channels with:
externally adjustable sensitivity
externally adjustable signal envelope time constant
externally adjustable noise envelope time constant
externally adjustable switch-over timing
externally adjustable idle mode timing
externally adjustable dial tone detector in
receive channel
adjustable switching range
constant sum of gain during switching
constant sum of gain at different volume settings.
SSOP24
NAME
DIP28
DIP24
SO28
SO24
plastic dual in-line package; 28 leads (600 mil)
plastic dual in-line package; 24 leads (600 mil)
plastic small outline package; 28 leads; body width 7.5 mm
plastic small outline package; 24 leads; body width 7.5 mm
plastic shrink small outline package; 24 leads; body width 5.3 mm
2
DESCRIPTION
APPLICATIONS
GENERAL DESCRIPTION
The TEA1094 and TEA1094A are bipolar circuits intended
for use in mains, battery or line-powered telephone sets,
cordless telephones, answering machines and Fax
machines. In conjunction with a member of the TEA106X,
TEA111X families of transmission circuits, the devices
offer a hands-free function. They incorporate a
microphone amplifier, a loudspeaker amplifier and a
duplex controller with signal and noise monitors on
both channels.
Mains, battery or line-powered telephone sets with
hands-free/listening-in functions
Cordless telephones
Answering machines
Fax machines.
PACKAGE
TEA1094; TEA1094A
Product specification
SOT101-1
SOT136-1
SOT137-1
SOT340-1
VERSION
SOT117-1