TEA1093T Philips Semiconductors, TEA1093T Datasheet - Page 7

• Manufacturer Part Number: TEA1093T
• Description: Hands-free IC
• Manufacturer: Philips Semiconductors

Philips Semiconductors
Supply: pins SUP, SREF, V
As can be seen from Fig.4, the line current is divided
between the speech-transmission circuit (I
the TEA1093 circuit (I
Where:
The TEA1093 stabilizes its own supply voltage of 3.6 V at
V
external resistor R
1996 Feb 09
handbook, full pagewidth
BB
I
I
V
R
I
It follows that I
Hands-free IC
SUP
TR
CC
SUP
. The voltage on V
SREF
= V
= I
1 mA
= 100
SUP
line
V
line
SREF
I line
I
V
TR
I CC
= 315 mV
SREF
SUP
V CC
V EE
VA
TEA106X
I
CC
.
/R
SUP
BB
I
LINE
SREF
SLPE
can be adjusted by means of an
). It can be shown that:
LN
I SUP
R SREF
100
BB
I TR
4 mA.
, GND, VA and PD
C SREF
4.7 nF
9
7
SUP
SREF
TEA1093
TR
315 mV
V
+ I
Fig.4 Supply arrangement.
V
CC
) and
TR1
SWITCH
TR2
7
C STAB
4.7 nF
When R
voltage on V
pin V
Two capacitors of 4.7 nF (C
to ensure stability of the supply block. When V
greater than V
V
GND via TR2, which prevents distortion on the line.
To reduce current consumption during pulse dialling or
register recall (flash), the TEA1093 is provided with a
power-down (PD) input. When the voltage on PD is HIGH,
the current consumption from SUP is 55 A and from
V
sufficient to power the TEA1093 during pulse dialling.
BB
BB
via TR1. When V
400 A. Therefore a capacitor of 470 F (C
A
8
STABILIZER
and V
VOLTAGE
GND
to dynamic
VA
limiter
is connected between pin V
BB
BB
BB
, it is decreased. This is shown in Fig.5.
is increased, when connected between
+ 0.4 V, the current I
POWER
DOWN
SUP
is less, the current is shunted to
V BB
PD
VA
SREF
10
17
15
and C
R VA
Product specification
SUP
A
STAB
and GND, the
TEA1093
is supplied to
MGD219
) are required
C VBB
470 F
SUP
VBB
is
) is