L7554 AGERE [Agere Systems], L7554 Datasheet - Page 3

• Manufacturer Part Number: L7554
• Description: L7554 Low-Power SLIC
• Manufacturer: AGERE [Agere Systems]

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