tea1099h NXP Semiconductors, tea1099h Datasheet - Page 8

• Manufacturer Part Number: tea1099h
• Description: Speech And Handsfree Ic With Auxiliary Inputs/outputs And Analog Multiplexer
• Manufacturer: NXP Semiconductors

Philips Semiconductors
E
The TEA1099H can be supplied by the line as well as by
external power sources (voltage or current sources) that
must be connected to pin ESI.
The IC will choose which supply to use according to the
voltage it can provide. A voltage supply on ESI is efficient
only if its value is greater than the working voltage of the
internal V
to be line powered. The current consumed on this source
is at least equal to the internal consumption. It increases
with the voltage difference between the value forced on
ESI and the working voltage of the internal stabilizer.
The excess current compared to the internal consumption
becomes then available for other purposes such as
supplying a loudspeaker amplifier. The voltage source
should not exceed 6 V. If the value of the external voltage
source can be lower than the working voltage of the
internal stabilizer, an external diode is required to avoid
reverse current flowing into the external power supply.
In case of current source, the voltage on V
depends on the current available. It is internally limited to
6.6 V. The current source should not exceed 140 mA.
1999 Apr 08
XTERNAL SUPPLY
Speech and handsfree IC with auxiliary
inputs/outputs and analog multiplexer
handbook, full pagewidth
voltages
(V)
BB
8
6
4
2
0
0
voltage stabilizer. Otherwise the IC continues
(
PINS
ESI
0.01
AND
V
BB
)
0.02
BB
and ESI
Fig.4 Main DC voltages.
0.03
8
V
The voltage on V
with a difference typically equal to 250 mV and is internally
limited to 3.35 V. This voltage is temperature
compensated. This supply point can provide a current up
to 3 mA typically. Its internal consumption stays low (a few
10 nA) as long as V
An external voltage can be connected on V
extra consumption on V
source should not be lower than 3.5 V or higher than 6 V.
V
currents provided either from the line or from ESI, taking
into account the internal current consumption.
DD
BB
and V
SUPPLY FOR MICROCONTROLLER
0.04
DD
can supply external circuits in the limit of
DD
supply point follows the voltage on V
DD
0.05
does not exceed 1.5 V (see Fig.5).
DD
(typically 100 A). This voltage
0.06
(
PIN
Product specification
TEA1099H
V
I line (A)
DD
DD
)
SLPE
V DD
MICS
V BB
FCA049
with limited
LN
0.07
BB