pbl386141 ETC-unknow, pbl386141 Datasheet - Page 7

• Manufacturer Part Number: pbl386141
• Description: Pbl 386 14/1 Subscriber Line Interface Circuit
• Manufacturer: ETC-unknow

Notes
1.
2.
3.
The overload level is automatically expanded to 2.5 V
when the signal level > 1.0 V
two-wire port with the signal source at the four-wire
receive port.
The two-wire impedance is programmable by selection of
external component values according to:
Higher return loss values can be achieved by adding a
reactive component to R
impedance programming resistance, e.g. by dividing R
into two equal halves and connecting a capacitor from the
common point to ground.
Z
Z
Z
G
TR
TR
T
2-4S
RSN
= Z
= impedance between the TIPX and RINGX
= programming network between the VTX and RSN
= transmit gain, nominally = -0.5
= receive current gain, nominally = 400 (current
T
terminals
terminals
defined as positive flowing into the receivesumm-
ing node, RSN, and when flowing from tip to ring).
/|G
2-4S
RSN
| where:
T
, the two-wire terminating
Peak
and is specified at the
Peak
T
4.
5.
6.
7.
8.
9.
The overload level is automatically expanded as needed up
to 1.25 V
specified at the four-wire transmit port, VTX, with the signal
source at the two-wire port. Note that the gain from the
two-wire port to the four-wire transmit port is G
Secondary protection resistors R
The specified insertion loss is for R
The specified insertion loss tolerance does not include
errors caused by external components.
The level is specified at the four-wire receive port and
referenced to a 600
level.
The two-wire idle noise is specified with the four-wire
receive port grounded (E
The four-wire idle noise at VTX is the two-wire value -6 dB
and is specified with the two-wire port terminated in 600
(R
programmed two-wire impedance level at VTX. The four-
wire receive port is grounded (E
The V
programmed linecurrent, I
the terminal (e.g. calculated to 21.9V).
L
). The noise specification is referenced to a 600
Bat2
Peak
voltage is optimized for R
when the signal level >0.5 V
programmed two-wire impedance
RX
L
=27 mA. This gives V
= 0; see figure 6).
RX
F
impact the insertion loss.
= 0).
L
F
=600
= 0.
PBL 386 14/1
Peak
with a
and is
2-4S
Bat2
= -0.5.
=22 V at
7