PEF 20954 HT V1.1 Infineon Technologies, PEF 20954 HT V1.1 Datasheet - Page 28

• 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 8
Pin No. Symbol
135
136
Table 9
Pin No. Symbol
82
81
93
Table 10
Pin No. Symbol
12
11
Data Sheet
UCCO
TUCCO
TSIGM
TMFBI
TMFBO
DIS
NLPDIS
UCC Interface
Speech Highway Control Signals for CAS in T1 Systems
Channelwise Serial Interface
I/O, PU/PD Function
I/O, PU/PD Function
I/O, PU/PD
O
O
I, PD
I, PD
O
I, PD
I, PD
2.048 Mbit/s UCC highway output. Start of
timeslot 0, bit 7 and frame number can be
flexibly aligned to the SYNCI/SYNCO pulse in
122 ns steps via registers UCCMFR,
UCCALIGN and PHALIGN[7:6]
Tristate control signal for external tristate
output buffer at the UCCO bus, active low.
Remains inactive after a power on reset until
the configuration by the P has been settled.
Active only at UCC timeslot 0 for UCC frames
that correspond to processed PCM channels
Transmit Signaling Marker, indicating robbed
bits at SI, corresponding to the delay of SI
Transmit Multiframe Begin Input
corresponding to the delay of SI
Transmit Multiframe Begin Output
corresponding to the delay of SO. The delay of
TMFBI to TMFBO is identical to the delay of SI
to SO
Function
Serial 256 kbit/s disable signal to bypass the
canceller, NLP and attenuator and to reset the
H-Register and Speech Control unit on a per
channel basis. High active, maskable, leave
open or connect to ground if unused
Serial 256 kbit/s signal to disable the NLP on
a per channel basis. High active, maskable,
leave open or connect to ground if unused
28
Rev. 2, 2004-07-28
Pin Description
PEB 20954
PEF 20954