PEF 20954 HT V1.1 Infineon Technologies, PEF 20954 HT V1.1 Datasheet - Page 29
PEF 20954 HT V1.1
Manufacturer Part Number
PEF 20954 HT V1.1
Description
IC ECHO CANCELLER DGTL TQFP144
Manufacturer
Infineon Technologies
Datasheet
1.PEB_20954_HT_V1.1.pdf
(164 pages)
Specifications of PEF 20954 HT V1.1
Function
Smart Integrated Digital Echo Canceller (SIDEC)
Interface
PCM, Serial, UCC
Number Of Circuits
1
Voltage - Supply
3 V ~ 3.6 V
Current - Supply
350mA
Power (watts)
900mW
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
144-LFQFP
Includes
Double Talk Detection
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
PEF20954HTV1.1
SP000007505
SP000007505
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Table 10
Pin No. Symbol
10
9
8
7
24
23
22
21
Data Sheet
18
FREEZE
CONVDIS
ENCC
FLEXSCTR
DISMON
NLPDISMON
FREEZEMON O
HRESMON
FLEXMON1
Channelwise Serial Interface (cont’d)
I/O, PU/PD
I, PD
I, PD
I, PD
I, PD
O
O
O
O
Function
Serial 256 kbit/s signal to freeze the H-
Registers on a per channel basis. High active,
maskable, leave open or connect to ground if
unused
Serial 256 kbit/s signal to disable A/ -Law
conversion on a per channel basis. High
active, maskable, leave open or connect to
ground if unused
Serial 256 kbit/s signal to enable clear channel
transparency on a per channel basis. High
active, maskable, leave open or connect to
ground if unused, same function as DIS='1'
and CONVDIS='1'
Flexible serial 256 kbit/s control signal on a
per channel basis. Configurable by register
CONFLEXSCTR. High active, maskable,
leave open or connect to ground if unused
Serial 256 kbit/s EC disable (signals bypass
channels) monitor output signal ('0': EC on, '1':
EC off)
Serial 256 kbit/s NLP disable monitor output
signal ('0': NLP on, '1': NLP off)
Serial 256 kbit/s H-Register freeze monitor
output signal ('1': freeze, '0': no freeze)
Serial 256 kbit/s H-Register reset monitor
output signal ('1': reset, '0': no reset)
Serial 256 kbit/s monitor output signal (32
channels at 8 kbit/s), monitoring according to
settings of the bits CONFLEXMON[7:4], e.g.
Idle channel detection, 2010 Hz tone
detected, 2100 Hz tone with or without phase
reversal detected, double talk detected, no
speech detected
29
Rev. 2, 2004-07-28
Pin Description
PEB 20954
PEF 20954
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