PBL 386 50/2
Electrical Characteristics
0
°C ≤
T
Amb
≤
+70
°C,
PTG = Open (see pin description), R
OV
=
∞,
V
CC
= +5V
±5
%, V
Bat
= -58V to -40V, V
Bat2
= -32V, R
LC
=32.4 kΩ, I
L
= 27 mA. R
L
= 600
Ω,
R
F1
= R
F2
= R
P1
= R
P2
=0, R
Ref
= 49.9 kΩ, C
HP
= 47 nF, C
LP
=0.15
µF,
R
T
= 60 kΩ, R
SG
= 0 kΩ, R
RX
= 60 kΩ, R
R
=
11 kΩ unless otherwise specified. Current definition: current is positive if flowing into a pin.
Parameter
Ref
fig
Conditions
Min
Typ
Max
Unit
Two-wire port
Overhead voltage, V
TRO
,I
Ldc
> 18mA
On-Hook, I
Ldc
< 5mA
Over load level, metering
Input impedance, Z
TR
Longitudinal impedance, Z
LOT
, Z
LOR
Longitudinal current limit, I
LOT
, I
LOR
Longitudinal to metallic balance, B
LM
(IEEE standard 455-1985, Z
TRX
=736Ω)
Longitudinal to metallic balance, B
LME
E
Lo
B
LME
= 20 · Log
V
TR
Longitudinal to four-wire balance, B
LFE
B
LFE
= 20 · Log
E
Lo
V
TX
4
2
Active state, R
OV
=
∞
0.2 kHz < f < 3.4 kHz
1% THD, Note 1
f≤16kHz, Z
LAC
=200Ω, Adj. by R
OV
Note 2
0 < f < 100 Hz
active state
Normal polarity:
0.2 kHz < f < 1.0 kHz
1.0 kHz < f < 3.4 kHz
Reverse polarity:
0.2 kHz < f < 3.4 kHz
Normal polarity:
0.2 kHz < f < 1.0 kHz
1.0 kHz < f < 3.4 kHz
Reverse polarity:
0.2 kHz < f < 3.4 kHz
0.2 kHz < f < 3.4 kHz
2.7
1.1
5.0
Z
T
/200
20
18
55
55
55
61
61
61
40
75
70
68
50
35
V
Peak
V
Peak
V
Peak
Ω/wire
mA
rms
/wire
dB
dB
dB
dB
dB
dB
dB
3
3
Metallic to longitudinal balance, B
MLE
V
TR
B
MLE
= 20 · Log
; E
RX
= 0
V
Lo
C
TIPX
VTX
Figure 2. Overhead voltage, V
TRO
, two-
wire port
1
<< R
L
, R
L
= 600
Ω
ωC
R
T
= 60 kΩ, R
RX
= 60 kΩ
R
L
V
TRO
I
LDC
PBL 386 50/2
RINGX
RSN
R
T
E
RX
R
RX
TIPX
E
Lo
VTX
Figure 3. Longitudinal to metallic (B
LME
)
and Longitudinal to four-wire (B
LFE
)
balance
1
<< 150
Ω,
R
LR
=R
LT
=R
L
/2=300Ω
ωC
R
T
= 60 kΩ, R
RX
= 60 kΩ
C
R
LT
V
TR
R
LR
RINGX
RSN
R
RX
PBL 386 50/2
R
T
V
TX
3
ERICSSON [ ERICSSON ]
