PBL386402QNAXT Infineon Technologies, PBL386402QNAXT Datasheet - Page 46

• Manufacturer Part Number: PBL386402QNAXT
• Manufacturer: Infineon Technologies

Specifications of PBL386402QNAXT

• Number Of Channels: 1
• On-hook Transmission: Yes
• Polarity Reversal: Yes
• On-chip Ring Relay Driver: Yes
• Operating Temp Range: -40C to 85C
• Package Type: PLCC
• Loop Current Limit: 45mA
• Operating Temperature Classification: Industrial
• Pin Count: 28
• Mounting: Surface Mount
• Operating Supply Voltage (max): 5.25/-58V
• Lead Free Status / RoHS Status: Compliant

9.2
The ring relay driver and the ring trip detector are activated and the ring trip detector is
indicating off-hook with a logic low level at the detector output. The SLIC is in the active
normal state.
9.3
TIPX is the terminal closest to ground and sources loop current while RINGX is the more
negative terminal and sinks loop current. VF signal transmission is normal. The loop
current or ground key detector is activated. The loop current detector is indicating off
hook with a logic low level and the ground key detector is indicating active ground key
with a logic high level present at the detector output.
In PBL 38640/2 SLIC a line voltage measurement feature is available in the active state,
which may be used for line length estimations or for line test purposes. The line voltage
is presented on the detector output as a pulse at logic high level with a pulsewidth of
5.5 s/V. To start the line voltage measurement this mode has to be entered fron the
active state with the loop or ground key detector active. The pulse presented at the DET
output proportional to the line voltage starts when entering the line voltage measuring
mode.
9.4
Tip open state is used for ground start signalling. In this state the SLICs present a high
impedance to the line on the TIPX pin and the programmed DC characteristics, with the
longitudinal current compensation (see
pin. The loop current detector is active.
9.5
TIPX and RINGX polarity is reversed from the active state: RINGX is the terminal closest
to ground and sources loop current while TIPX is the more negative terminal and sinks
current. VF signal transmission is normal. The loop current or the ground key detector is
activated. The loop current detector is indicating off hook with a logic low level and the
ground key detector is indicating active ground key with a logic high level present at the
detector output.
10
10.1
The SLIC must be protected against foreign voltages on the telephone line.
Overvoltages can result from lightning, AC power contact, induction and other causes.
Data Sheet
Ringing (C3, C2, C1 = 0, 0, 1)
Active States
Tip Open State
Active Polarity Reversal State
Overvoltage Protection
Overvoltage Protection - General
Chapter
46
5.7) not active, to the line on the RINGX
Overvoltage Protection
Rev. 2.0, 2005-04-14
PBL 38640/2
FlexiSLIC