PBL38614-1 Ver la hoja de datos (PDF) - Ericsson
Número de pieza
componentes Descripción
Fabricante
PBL38614-1 Datasheet PDF : 18 Pages
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PBL 386 14/1
Pin Description
Refer to figure 7.
SSOP Symbol
1 RRLY
2 TS
3 HP
4 RINGX
5 BGND
6 TIPX
7 VBAT
8 VBAT2
9 NC
10 PSG
11 LP
12 DT
13 DR
14 NC
15 NC
16 VEE
17 REF
18 NC
19 PLC
20 PLD
21 VCC
} 22 C3
23 C2
24 C1
25 DET
26 RSN
27 AGND
28 VTX
Description
Ring Relay driver output.
Tip Sense should be connected to TIPX.
High Pass connection for ac/dc separation capacitor CHP. Other end of CHP connects to RINGX (pin 26).
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).
On-hook battery voltage. Negative with respect to BGND.
Off-hook battery voltage, connected in series with a diode.
No Connect. Must be left open.
Programmable Saturation Guard. Must be connected to VBAT2.
Low Pass saturation guard filter capacitor connected here to filter out noise and improve PSRR. Other end of
CLP connects to VBAT2.
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 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 ring trip network connects to this input.
No Connect. Must be left open.
No Connect. Must be left open.
-5V power supply, if not -5 V available connect to VB2 or VBAT (VB2 lower power dissipation than VBAT).
A 15kΩ resistor must be connected between this pin and AGND.
No Connect. Must be left open.
Prog. Line Current, the constant current part of the DC feed characteristic is programmed by a resistor
connected from this pin to AGND.
Programmable Loop Detector threshold. The loop detection threshold is programmed by a resistor
connected from this pin to AGND.
+5 V power supply.
C1, C2 and C3 are digital inputs Controlling the SLIC operating states. Refer to section
Operating states for details.
Detector output. Active low when indicating loop or ring trip detection, active high when indicating ground
key detection, active low when indicating temperature alarm.
Receive Summing Node. 400 times the current flowing into this pin equals the metallic (transversal) current
flowing from TIPX to RINGX. Programming networks for two-wire impedance and receive gain connect to the
receive summing node.
Analog Ground, should be tied together with BGND.
Transmit vf output. The ac voltage difference between TIPX and RINGX, the ac metallic voltage, is
reproduced as an unbalanced GND referenced signal at VTX with a gain of -0.5. The two-wire impedance
programming network connects between VTX and RSN.
8
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