PRELIMINARY
PCT1789W DATA SHEET
PCT303DW APPLICATION CIRCUITS
!!
Analog Output
Figure 3 illustrates an optional application circuit to support the analog output capability of the PCT303DW for call
progress monitoring purposes.
+5V
C3
R3
C6
6
+
C2
3
2
C4
5
AOUT
R1
C1
–
4
U1
+
C5
R2
Speaker
Figure 3 Optional Connection to AOUT For a Call Progress Speaker
Table 2 Optional Connection Component Values
‘
Symbol
Value
C1
2200pF, 16V, ±20%
0.1µF, 16V, ±20%
100µF, 16V, Elec. ±20%
820pF, 16V, ±20%
10kW, 1/10W, ±5%
10W, 1/10W, ±5%
47kW, 1/10W, ±5%
LM386
C2, C3, C5
C4
C6
R1
R2
R3
U1
PRELIMINARY
PC-TEL, Inc.
8
1789W0DOCDAT06A-0299