PEF 20954 HT V1.1 Infineon Technologies, PEF 20954 HT V1.1 Datasheet - Page 55

• 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

Figure 16
In this mode a 2.048 MHz system clock is provided at either the RFCLKF, RFCLKN or
the RFCLKEX pin. The VCXO and VCO supply the operating clocks for the SIDEC.
SDECO can be connected to slave. The feedback from SCLKO to SCLKI in order to
generate a control voltage for the 32 MHz VCO makes only sense if SCLKO is derived
from CLK16. The SDECI initializes the counter.
Data Sheet
RFCLKF
2 MHz
RFCLKN
RFCLKEX
Reference Clock Mode with 2.048 MHz
VCXO
logic
SIDEC
:2
55
:4
VCO
logic
:2
SDECO (to slave)
SCLKO
CLK4O
SCLKI
Operational Description
Reference clock mode 2M
(see explanation
below)
Rev. 2, 2004-07-28
PEB 20954
PEF 20954