PEF 20954 HT V1.1 Infineon Technologies, PEF 20954 HT V1.1 Datasheet - Page 39

• Manufacturer Part Number: PEF 20954 HT V1.1
• Description: IC ECHO CANCELLER DGTL TQFP144
• Manufacturer: Infineon Technologies

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

Table 23
Pin No. Symbol
E1
E2
D1
D2
K2
K1
J2
J1
H2
Data Sheet
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
39
Rev. 2, 2004-07-28
Pin Description
PEB 20954
PEF 20954