SPEECH CIRCUIT. LS288 Datasheet

LS288 CIRCUIT. Datasheet pdf. Equivalent

Part LS288
Description PROGRAMMABLE TELEPHONE SPEECH CIRCUIT
Feature LINEAR INTEGRATED CIRCUIT PROGRAMMABLE TELEPHONE SPEECH CIRCUIT The LS288 is a monolithic integrat.
Manufacture SGS
Datasheet
Download LS288 Datasheet

LINEAR INTEGRATED CIRCUIT PROGRAMMABLE TELEPHONE SPEECH CIR LS288 Datasheet
Recommendation Recommendation Datasheet LS288 Datasheet




LS288
LINEAR INTEGRATED CIRCUIT
PROGRAMMABLE TELEPHONE SPEECH CIRCUIT
The LS288 is a monolithic integrated circuit in 16 lead dual in-line plastic
signed as a repla-
cement for the hybrid circuit in telephone sets it performs all the func
carried out by
this circuit.
With the LS288 it is possible to select the operating mode (fixed or
both piezoceramic and dynamic transducers and therefore its
sending and receiving paths,
can be preset by means of two external resistors. This fe
obtained in AGC operating
mode, when the device automatically adjusts the Rx/Tx gai
nsate for the line attenuation by
sensing the line current.
The LS288 can supply the decoupling FET when
g with an electret microphone. Output impe·
dance can be matched to the line independent
impedance.
VL
IL
IL
Ptot
Top
Tstg' Tj
ORDERING NUMBER: LS288 B
MECHANICAL DATA
22
150
-150
1
-45 to 70
-65 to 150
rnA
rnA
W
°C
°C
Dimensions in mm
6/82 292



LS288
CONNECTION DIAGRAM
(top view)
AGC CUTOFF
MICROPHONE INPUT] 2
SENDING GAIN
PROGRAM.
RECEIVING GAIN
PROGRAM.
BAL. NETWORK
REC. INPUT
LINE - (GND)
16 A C LOOP OPENING
15
AC AND DC
IMPED.MATCHING
14 SENDING AMP OUT
13 LINE ""
12 B IA S RESISTOR
11 ELECTRET MIKE
SUPPLY
$- 4468"
BLOCK DIAGRAM
r----------{==~--------~--==J_~~--~------------------------,~
R2 R1
C2
14
BIAS
RESISTOR
I
- - -(~'o--"
I
293
5-4934





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