PSB21150HV14XP Lantiq, PSB21150HV14XP Datasheet - Page 61

• Manufacturer Part Number: PSB21150HV14XP
• Manufacturer: Lantiq

Specifications of PSB21150HV14XP

• Number Of Line Interfaces: 1
• Control Interface: HDLC
• Lead Free Status / Rohs Status: Compliant

3.3.6
The receiver consists of a differential input stage, a peak detector and a set of
comparators. Additional noise immunity is achieved by digital oversampling after the
comparators. A simplified equivalent circuit of the receiver is shown in
Figure 30
The input stage works together with external 10 k W resistors to match the input voltage
to the internal thresholds. The data detection threshold Vref is continiously adapted
between a maximal (Vrefmax) and a minimal (Vrefmin) reference level related to the line
level. The peak detector requires maximum 2 m s to reach the peak value while storing
the peak level for at least 250 m s (RC > 1 ms).
The additional level detector for power up/down control works with a fixed thresholds
VrefLD. The level detector monitors the line input signals to detect whether an INFO is
present. When closing an analog loop it is therefore possible to indicate an incoming
signal during activated loop.
Data Sheet
10 kW
10 kW
SR2
SR1
Receiver Characteristics
Equivalent Internal Circuit of the Receiver Stage
40 kW
40 kW
100 kW
VCM
61
Vrefmin
Description of Functional Blocks
Peak
Detector
Vref+
Vref-
VrefLD
PSB/PSF 21150
Figure
Negative detected
Positive detected
Level detected
2003-01-30
30.
IPAC-X
reccirc