Philips Semiconductors
Product specification
Voice switched speakerphone IC
FEATURES
•
External power supply with power-down function
•
Transmit channel with:
– externally adjustable gain
– transmit mute function
•
Receive channel with:
– externally adjustable gain
– logarithmic volume control via a linear potentiometer
– receive mute function
•
Duplex controller consisting of:
– signal envelope and noise envelope monitors for both
channels with:
externally adjustable sensitivity
externally adjustable signal envelope time constant
externally adjustable noise envelope time constant
– decision logic with:
externally adjustable switch-over timing
externally adjustable idle mode timing
externally adjustable dial tone detector in receive
channel
– voice switch control with:
adjustable switching range
constant sum of gain during switching
constant sum of gain at different volume settings.
ORDERING INFORMATION
TYPE
NUMBER
TEA1095
TEA1095T
TEA1095TS
PACKAGE
NAME
DIP24
SO24
SSOP24
DESCRIPTION
plastic dual in-line package; 24 leads (600 mil)
plastic small outline package; 24 leads; body width 7.5 mm
plastic shrink small outline package; 24 leads; body width 5.3 mm
GENERAL DESCRIPTION
APPLICATIONS
TEA1095
•
Mains, battery or line-powered telephone sets
•
Cordless telephones
•
Answering machines
•
Fax machines
•
Hands-free car kits.
The TEA1095 is a bipolar circuit, that in conjunction with a
member of the TEA106X, TEA111X families of
transmission or TEA1096 transmission/listening-in circuits
offers a hands-free function. It incorporates a transmit
amplifier, a receiver channel amplifier and a duplex
controller with signal and noise monitors on both channels.
VERSION
SOT101-1
SOT137-1
SOT340-1
1997 Nov 25
2
Philips Semiconductors
Product specification
Voice switched speakerphone IC
TEA1095
QUICK REFERENCE DATA
V
BB
= 5 V; V
GND
= 0 V; f = 1 kHz; T
amb
= 25
°C;
MUTETX = LOW; MUTERX = LOW; PD = LOW; R
VOL
= 0
Ω;
measured
in test circuit of Fig.11; unless otherwise specified.
SYMBOL
V
BB
I
BB
G
vtx
∆G
vtxr
G
vrx
∆G
vrxr
SWRA
∆SWRA
T
amb
PARAMETER
supply voltage
current consumption from pin V
BB
voltage gain from TXIN to TXOUT in
transmit mode
voltage gain adjustment with R
GATX
voltage gain from RXIN to RXOUT in
receive mode
voltage gain adjustment with R
GARX
switching range
switching range adjustment
operating ambient temperature
with R
SWR
referenced to
R
SWR
= 365 kΩ
V
RXIN
= 20 mV (RMS);
R
GARX
= 16.5 kΩ
V
TXIN
= 1 mV (RMS);
R
GATX
= 30.1 kΩ
CONDITIONS
−
−
−15.5
−
−20.5
−
−40
−25
MIN.
2.9
TYP.
−
2.7
15.5
−
6.5
−
40
−
−
MAX.
12.0
3.8
−
+24.5
−
+19.5
−
+12
+75
UNIT
V
mA
dB
dB
dB
dB
dB
dB
°C
1997 Nov 25
3
Philips Semiconductors
Product specification
Voice switched speakerphone IC
PINNING
SYMBOL
MUTERX
RXIN
n.c.
GARX
RXOUT
GND
V
BB
VOL
SWR
STAB
SWT
IDT
PD
TXGND
MUTETX
TXOUT
GATX
TXIN
RNOI
RENV
RSEN
TNOI
TENV
TSEN
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
DESCRIPTION
receiver channel mute input
receiver amplifier input
not connected
receiver gain adjustment
receiver amplifier output
ground reference
supply voltage input
receiver volume adjustment
switching range adjustment
reference current adjustment
switch-over timing adjustment
idle mode timing adjustment
power-down input
ground reference for the transmit
channel
transmit channel mute input
transmit amplifier output
transmit gain adjustment
transmit amplifier input
receive noise envelope timing
adjustment
receive signal envelope timing
adjustment
receive signal envelope sensitivity
adjustment
transmit noise envelope timing
adjustment
transmit signal envelope timing
adjustment
transmit signal envelope sensitivity
adjustment
Fig.2 Pin configuration.
handbook, halfpage
TEA1095
MUTERX
RXIN
n.c.
GARX
RXOUT
GND
VBB
VOL
SWR
1
2
3
4
5
6
24 TSEN
23 TENV
22 TNOI
21 RSEN
20 RENV
19 RNOI
TEA1095
7
8
9
18 TXIN
17 GATX
16 TXOUT
15 MUTETX
14 TXGND
13 PD
MBG349
STAB 10
SWT 11
IDT 12
1997 Nov 25
5
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