75T204
5V Low-Power Subscriber
DTMF Receiver
VP
VP
VIN < VP
VIN > VP
7
Analog In
10 pF
0.01 µF
7
Analog In
>100 kΩ
GND
10 pF
>100 kΩ
GND
FIGURE 1: Input Coupling
XIN
10
ATB
11
VP
XOUT
9
75T204
XEN
6
XIN Connected to VP
10
11
75T204
XEN
6
Up to 10 Devices
FIGURE 2: Crystal Connections
3