PBL38772/1SOD 데이터 시트보기 (PDF) - Ericsson
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PBL38772/1SOD Datasheet PDF : 24 Pages
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PBL 387 72
18 PRT
19 PLD
20 VCC
21 C3
22 C2
23 C1
24 DET
25 VR
26 AGND
27 RSN
28 VTX
Programmable Ring-trip Resistor RRT connected between this pin and AGND. Sets the ring-trip threshold. The capacitor
CRT together with resistor RRT filters the ring-trip detector.
Programmable Loop Detector threshold. The loop detection threshold is programmed by a resistor, RLD, connected
between this pin and AGND.
+5 V power supply.
C1, C2, C3 are digital inputs, which control the SLIC
operating states. Refer to table 1 for details.
Detector output. Active low when indicating loop or ring-trip detection, active high when indicating ground key detection.
Low voltage ringsignal input.
Analog Ground, shall be tied together with BGND.
Receive Summing Node. 400 times the current flowing out of this pin equals the metallic (transversal) current
flowing from RINGX to TIPX. Programming networks for two-wire impedance and receive gain connect to the
receive summing node.
Transmit vf output. The ac voltage difference between TIPX and RINGX, the ac metallic voltage, is reproduced at VTX with a
gain of 0.5. The two-wire impedance programming network connects between VTX and RSN.
Note: A batwing is a package pin, which provides a low thermal resistance path to the silicon chip via the lead frame. By
soldering the batwing pins to PCB copper foil the device can be efficiently cooled. Note that batwing pins are at the same
voltage as the VBAT pin (substrate voltage).
SLIC Operating States
State
0
1
2
3
4
5
6
7
C3 C2 C1
00 0
00 1
01 0
01 1
10 0
10 1
11 0
11 1
SLIC Operating State
TIPX & RINGX open circuit
Ringing
Active
Active
Not applicable
Active
Active, reverse polarity
Active, reverse polarity
Table 1. SLIC operating states.
Active detector (DET response)
No active detector (DET is set high)
Ring-trip detector (DET active low)
Loop current detector (DET active low)
Loop voltage measurement (DET pulse train)
–
Ground key detector and loop ground fault detector (DET active high)
Loop current detector (DET active low)
Ground key detector and loop ground fault detector (DET active high)
EN/LZT 146 136 R1A © Ericsson Microelectronics, December 2001
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