Example Of Bellcore-Compatible Auxiliary Circuit - Epson S1C05251 Technical Manual

5.11.2 Example of Bellcore-Compatible Auxiliary Circuit

TIP
Protective
network
RING
To telephone
Hook
switch
DTMF
interface
Mute control
Note: The above circuit diagram is merely an example, and does not guarantee the operation of the
circuit.
∗ See Section 3.3, "Input Amp Circuit", for the R
S1C05251 TECHNICAL MANUAL
500 pF
R
R
500 pF
0.2 µF 0.2 µF
270 kΩ
470 kΩ
33 kΩ
0.2 µF
DTMF tone
Figure 5.11.2 Example of Bellcore-compatible auxiliary circuit
to R
1
5 ELECTRICAL CHARACTERISTICS
R R
3 5
1
INP
2
INN
R
6
FB
R
4
CASIN
CASFB
V
REF
EXTREF
HOOK
RDIN
#RDRC
0.1 µF
#RDET
PDWN
#RESET
V
SS
values.
6
EPSON
S1C05251
V
DD
V
DD
1 µF
BPOUT
0.1 µF
CDIN
SDO
SDI
#SCLK
#IRQ
#DET
#PQUAL
MODE1
MODE0
EXTCLK
18 pF
OSC4
OSC3
18 pF
3.579545 MHz
29