TEA7540 ST Microelectronics, Inc., TEA7540 Datasheet
TEA7540
Manufacturer Part Number
TEA7540
Description
Handsfree Controller
Manufacturer
ST Microelectronics, Inc.
Datasheet
1.TEA7540.pdf
(13 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
TEA7540A
Manufacturer:
ST
Quantity:
20 000
Company:
Part Number:
TEA7540DP
Manufacturer:
NXP
Quantity:
265
Part Number:
TEA7540DP
Manufacturer:
ST
Quantity:
20 000
Company:
Part Number:
TEA7540FPT
Manufacturer:
IDT
Quantity:
2 200
June 1993
DESCRIPTION
This 28 pins IC is an innovative approach to quality
handsfree telephone sets. It results from an extensive
research on speech signal.
PIN CONNECTION (top view)
T
NOISE/SPEECH DISCRIMINATION IN EMIS-
SION AND RECEPTION
INTEGRATED SIGNAL GAIN COMPRESSOR
IN BOTH MODES
PROGRAMMABLE ATTENUATORS IN BOTH
MODES
ADAPTED TO ACOUSTIC PARAMETERS OF
ALL CABINETS
LOW OPERATING VOLTAGE 2.5V
LOW OPERATING CURRENT 2.1mA
CHIP SELECT BETWEEN HANDSFREE AND
MONITORING MODES
is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without
MICOUT
HYST1
HYST2
OUTE
VREF
ATTE
GND
CCE
CE3
CE2
CE1
TIM
INE
CS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
D93TL005
HANDSFREE CONTROLLER
28
27
26
25
24
23
22
21
20
19
18
17
16
15
TEA7540DP
DIP28
ORDERING NUMBERS:
V+
IREF
OUTR
ATTR
ATR
VOL
AMP SUP
AMP IN
CCR
CR3
CR2
CR1
RECOUT
INR
TEA7540FP
PRELIMINARY DATA
TEA7540
SO28
1/13
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