PEF 20954 HT V1.1 Infineon Technologies, PEF 20954 HT V1.1 Datasheet - Page 102

• 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

BYPTHL[4:0]
READD[1:0]
DHHLEC
CONFSCU3[7:0] (Addr.: 14H): Configuration of speech control unit 3, write protected,
Reset value = A4H
H-Register Control:
MINLEV[4:0]
Double Talk:
DTTIME[1:0]
ITUDT
Data Sheet
LEV[4]
MIN
LEV[3]
MIN
Transhybrid loss as of which the canceling unit is bypassed
"00000":
"00001":
"00010":
"00011":
"00100":
"10010":
"11111":
"00": +0 dB
'1':Enables detection of a change in end echo path in the case of
Minimum level of SI and RI for controlling of the coefficients
(H-Register)
"00000":
"00001":
"00010":
"00011":
"00100":
"10100":
"11111":
"00": 32 ms
'0': double talk detection operates up to 0 dB transhybrid loss
'1': double talk detection according ITU: transhybrid loss greater or
Safety distance for SO > residual echo + READD comparison
'0': disabled
Double talk hangover time
high hybrid loss
equal 6 dB
LEV[2]
MIN
0 dB
3 dB
6 dB
9 dB
12 dB
...
54 dB
...
93 dB (theoretical value only, attenuation will never be
reached)
"01": +3 dB
minus infinite, no residual echo limitation
-67.5 dBm0
-66.0 dBm0
-64.5 dBm0
-63 dBm0
...
-39.0 dBm0
...
-22.5 dBm0
"01": 64 ms
LEV[1]
MIN
102
LEV[0]
MIN
"10": +6 dB
"10": 128 ms "11": 256 ms
TIME[1]
DT
"11": +9 dB
Register Description
TIME[0]
DT
Rev. 2, 2004-07-28
PEB 20954
PEF 20954
ITUDT