Data Sheet
March 1997
L7554 Low-Power SLIC
Description
(continued)
BGND
AGND
I
PROG
V
REG
V
BAT
CF1
CF2
FB1
V
CC
FB2
POWER CONDITIONING & REFERENCE
RECTIFIER
3
DCOUT
–
–1 V/24 mA
V
TX
0.1 µF
T
XI
C
EXTERNAL
9.6
VITR
+
SN
PT
A=4
SPARE
OP AMP
–
XMT
+
–
PR
A = –4
1
RCVN
RCVP
+
DCR
dc RESISTANCE
ADJUST
BATTERY FEED
STATE CONTROL
B0
B1
B2
LCTH
LOOP CLOSURE DETECTOR
+
NLC
–
RTSP
RTSN
RING TRIP DETECTOR
+
NRDET
–
RGDET
ICM
RING GROUND
DETECTOR
12-2569 (C)
Figure 1. Functional Diagram
Lucent Technologies Inc.
3