pbl386112sht ETC-unknow, pbl386112sht Datasheet - Page 7

• Manufacturer Part Number: pbl386112sht
• Description: Subscriber Line Interface Circuit
• Manufacturer: ETC-unknow

Notes
1.
2.
3.
The overload level is automatically expanded when the
signal level > 2.5 V
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
Peak
| where:
and is specified at the two-wire port
T
, the two-wire terminating
T
4.
5.
6.
7.
8.
The overload level is automatically expanded as needed up
to 2.5 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
L
). The noise specification is referenced to a 600
Peak
when the signal level >1.25 V
programmed two-wire impedance
RX
= 0; see figure 6).
RX
F
impact the insertion loss.
= 0).
F
= 0.
PBL 386 11/2
Peak
and is
2-4S
= -0.5.
7