CYG2217
Test Circuits
1. CYG2217 Transmit Insertion Loss
2. CYG2217 Receive Insertion Loss
Ω
Ω
=
=
Package Pinout
CYG2217 Pinouts & Definitions
PIN# Name Function
CYG2217
CYG22XX
1
TIP
Connection to telephone line Tip connected through an
external fuse.
GND
XMIT+
VCC
NC
RCV
TIP
RING
18
17
16
15
14
1
2
2
4
RING Connection to telephone line Ring conductor.
OH
RI
4
5
OH
Driving this pin high asserts the off-hook condition. The
hookswitch LED is current limited by an internal 300Ω resis-
tor.
5
RI
Active LOW indicates an incoming ring signal. This is pulsed
LOW by the AC ring signal and is not a steady state LOW
during ringing.
14 RCV Provides the analog output signal from the 2-4 wire convert-
er of the CYG2217. RCV uses a 2.5 volt reference signal and
therefore must be capacitively coupled to host equipment
which uses a ground reference.
15
16
NC
No connection.
VCC
Provides power to the CYG2217. Typically +5V, VCC should
not exceed 20V.
17 XMIT+ Provides the analog intput signal from the 2-4 wire converter
of the CYG2217. XMIT+ uses a 2.5 volt reference signal and
therefore must be capacitively coupled to host equipment
which uses a ground reference.
18 GND Connection to host system ground.
Rev. 1
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