L7554 Low-Power SLIC
Data Sheet
March 1997
Test Configurations
V
BAT
0.1 µF
V
CC
0.1 µF
V
REG
V
BAT
100
Ω
PT
BGND V
CC
AGND
VTR
20 kΩ
SN
R
LOOP
20 kΩ
L7554
SLIC
100
Ω
PR
DCOUT
XMT
XMT
65 kΩ
RCVN
10 kΩ
RCVP
26 kΩ
RCV
68.1 kΩ
I
PROG
B0
B1
24.9 kΩ
LCTH
B2
NLC
NRDET
RGDET
RTSP
CF1
RTSN
I
CM
VTX
TXI
0.1 µF
CF2
FB2 FB1
0.1 µF
0.1 µF
12-2570 (C)
Figure 4. L7554 Basic Test Circuit
V
BAT
OR V
CC
100
Ω
4.7 µF
DISCONNECT
BYPASS CAP
100
Ω
4.7 µF
DISCONNECT
BYPASS CAP
V
BAT
OR V
CC
V
S
V
BAT
OR
V
CC
TP
67.5
Ω
10 µF
PT
V
S
V
BAT
OR
V
CC
+
900
Ω
V
T/R
BASIC
TEST CIRCUIT
PR
–
BASIC
TEST CIRCUIT
+
V
M
67.5
Ω
56.3
Ω
10 µF
PR
–
V
S
PSRR = 20 log
---------
-
V
T/R
12-2335.a (C)
V
S
PSRR = 20 log
------
-
V
M
12-2336.a (C)
Figure 5. Metallic PSRR
Figure 6. Longitudinal PSRR
Lucent Technologies Inc.
12
AGERE [ AGERE SYSTEMS ]
