PBL 386 21/2
27
AGND
2
RRLY
PTG
1
RRLY
2
HP
3
RINGX
4
BGND
5
TIPX
6
VBAT
7
VBAT2
8
PSG
9
LP
10
DT
11
DR
12
24
23
22
21
VTX
AGND
RSN
REF
PLC
POV
PLD
VCC
DET
C1
C2
TIPX
VBAT
VBAT2
PSG
NC
RINGX
BGND
5
6
7
8
9
10
11
26
RSN
PTG
28
VTX
NC
4
3
HP
1
25
24
23
NC
REF
PLC
POV
PLD
VCC
NC
24-pin SOIC
and
24-pin SSOP
20
19
18
17
16
15
14
13
28-pin PLCC
22
21
20
19
LP
12
13
DR
14
C3
15
C2
16
C1
17
C3
Figure 7. Pin configuration, 24-pin SSOP, 24-pin SOIC and 28 pin PLCC package, top view.
Pin Description
Refer to figure 7.
PLCC
Symbol
Description
1
2
3
4
5
6
7
8
9
10
11
12
13
14
PTG
RRLY
HP
NC
RINGX
BGND
TIPX
VBAT
VBAT2
PSG
NC
LP
DT
DR
Prog. Transmit Gain.
Left open transmit gain = 0.0 dB, connected to AGND transmit gain = -6.02 dB.
Ring Relay
driver output. The relay coil may be connected to maximum +14V.
Connection for
High Pass
filter capacitor, C
HP
. Other end of C
HP
connects to TIPX.
No
internal
Connection.
The TIPX and RINGX pins connect to the tip and ring leads of the two-wire interface via overvoltage
protection components and ring relay (and optional test relay).
Battery Ground,
should be tied together with AGND.
The TIPX and RINGX pins connect to the tip and ring leads of the two-wire interface via overvoltage
protection components and ring relay (and optional test relay).
Battery
supply
Voltage.
Negative with respect to GND.
An optional second (2)
Battery Voltage
connects to this pin via an external diode.
Programmable Saturation Guard.
The resistive part of the DC feed characteristic is not used for
PBL 386 21/2, RSG = 0
Ω.
No
internal
Connection.
Connection for
Low Pass
filter capacitor, C
LP
. Other end of C
LP
connects to VBAT.
Input to the ring trip comparator. With DR more positive than DT the detector output, DET, is at logic
level low, indicating off-hook condition. The external ring trip network connects to this input.
Input to the ring trip comparator. With DR more positive than DT the detector output, DET, is at logic
level low, indicating off-hook condition. The external ring trip network connects to this input.
8
DET
18
DT
ERICSSON [ ERICSSON ]
