CPC5610/CPC5611
Figure 2. Pinout
1.3 Pin Description
VDD
1
REFL
32
Pin Name Function
TXSM
TX-
TXF
31
2
3
ZTX
30
1
2
VDD
Host (CPE) side power supply
Transmit summing junction
TX+
TX
ZNT
29
4
TXSM
TXSL
28
5
BR-
27
6
REFM
GND
OH
Negative differential transmit signal to DAA
from host
3
4
TX-
NTS
26
7
GAT
25
8
REFB
24
Positive differential transmit signal to DAA from
host
9
RING
CID
TX+
DCS1
23
10
11
12
13
14
15
16
DCS2
22
RX-
5
6
7
8
9
TX
Transmit differential amplifier output
Internal voltage reference
ZDC
21
RX+
SNP+
SNP-
RXF
RX
BR-
20
REFM
GND
OH
RPB
19
Host (CPE) side analog ground
Assert logic low for off-hook operation
Indicates ring signal, pulsed high to low
RXS
18
17
VDDL
RING
Assert logic low while on hook to place CID
information on RX pins.
10 CID
Negative differential analog signal received
from the telephone line. Must be AC coupled
with 0.1 µF.
11 RX-
Positive differential analog signal received from
the telephone line. Must be AC coupled with
0.1 µF.
12 RX+
13 SNP+
14 SNP-
15 RXF
16 RX
Positive differential snoop input
Negative differential snoop input
Receive photodiode amplifier output
Receive photodiode summing junction
Power supply for line side, regulated from tip
and ring.
17 VDDL
18 RXS
19 RPB
20 BR-
Receive isolation amp summing junction
Receive LED pre-bias current set
Bridge rectifier return
21 ZDC
22 DCS2
23 DCS1
24 REFB
25 GAT
26 NTS
27 BR-
Electronic inductor and DC current limit
DC feedback output
V to I slope control
0.625 Vdc reference
External MOSFET gate control
Receive signal input
Bridge rectifier return
28 TXSL
29 ZNT
30 ZTX
31 TXF
32 REFL
Transmit photodiode summing junction
Receiver impedance set
Transmit transconductance gain set
Transmit photodiode amplifier output
1.25 Vdc reference
Rev. 9.0
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