TEA7092 datasheet(6/57 Pages) STMICROELECTRONICS

Part #	TEA7092

Description	TELEPHONE SET INTEGRATED CIRCUIT

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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25

100k

Ω

100k

Ω

Ip

Internal Amp-op

Current Supply

26

C8

+

C14

+

±1mA

V

REF

V

CC

29

I

REF

R2

30k

Ω

Internal

I

REF

300mV

R10

R11a + R11b

3 VL

From Line

The sum of all the currents on Pin 26 (V

CC) is equal to 1.3mA

(without ac receive signal)

Figure 1 :

VREF (Pin 25) : Transmit and Receive Reference Voltage (VCC/2)

VCC (Pin 26) : Transmit and Receive Power Supply

IREF (Pin 29) : Internal Reference Current

30

C11

225k

Ω

V

S

V

CC

R3

31

SLPE

R12

3

V

L

MIRROR

1.5

1

I

L/85

(to transmit

channel)

V

CC

50

µA

V

CC

11

µA

kIL =

I

L - 5.6mA

Rslope = R3/55

V

L = R12 x (40 + 0.5 x IL)E

-6

+ Rslope (I

L - 5.6) E

-3

;I

L in mA (for IL < 20mA)

V

L =VL (at 20mA) + Rslope x (IL -20) E

-3

;I

L in mA (for IL > 20mA)

1016

kIL =

I

L - 5.6mA

1016

Figure 2 :

SLPE (Pin 31) : DC Mask Slope

VS (Pin 30) : Shunt Regulator

I - TEA7092 GENERAL INFORMATION (continued)

I.4 - Input / Output Configurations

TEA7092 - TELEPHONE SET INTEGRATED CIRCUIT

6/57

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