CPC5604
Table 2 -Package Pinout
Pin # Name Function
VCC
1
BR-
TXF2
ZTX
ZNT
TXS
BR-
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
TXF1
TX-
2
3
1
2
3
4
5
6
7
8
9
VCC
TXF1
TX -
TX+
TX
Host power supply, +5 Volts +/-5%.
TX isolation amplifier output.
4
TX+
TX
5
NEG differential transmit signal into DAA.
POS differential transmit signal into DAA.
TX differential amplifier input.
6
NC
NTS
GAT
REF
DCS
DCF
ZDC
BR-
7
GND
OH
8
9
RING
CID
10
11
12
13
14
15
16
NC
Not Connected.
RX-
RX+
SNP+
SNP-
RXF
RX
GND
OH
Connect to host analog ground.
Driving this signal low asserts the off-hook condition.
RPB
RXS
VDD
RING Active low indicates an incoming half waved ring signal
pulsed High to Low at the ring frequency-typically 20Hz.
10
11
12
CID
RX-
RX+
Driving this signal low places the Caller ID information
on the RX pins when the DAA is on hook (OH is
deasserted).
NEG differential analog receive signal from the tele-
phone line and must be AC coupled with a 0.1 uF
capacitor.
POS differential analog receive signal from the tele-
phone line and must be AC coupled with a 0.1 uF
capacitor.
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
SNP+
SNP-
RXF
RX
One of two differential snoop inputs.
One of two differential snoop inputs.
Receive photodiode amplifier output.
Receive photoamplifier summing junction.
Power supply for line side portion of CPC5604.
Receive photodiode servo input.
VDD
RXS
RPB
BR-
Sets receive LED prebias current.
Return to bridge rectifier negative output.
Sets electronic inductor DCR/Current Limit.
DC Filter Point.
ZDC
DCF
DCS
REF
GAT
NTS
BR-
VI slope control via external resistor.
1.25V internal voltage reference.
Depletion MOSFET gate control.
Receive signal input path via Tip and Ring.
Return to bridge rectifier negative output.
Receive photodiode amplifier input.
Sets DAA impedance via external passive network.
Transmit Transconductance gain setting pin.
Receive photodiode amplifier output.
Return to bridge rectifier negative output.
TXS
ZNT
ZTX
TXF2
BR-
XXX
6
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