ia3211 integration, ia3211 Datasheet - Page 8

• Manufacturer Part Number: ia3211
• Description: Optical Silicon Daa Modem/lineside Chipset
• Manufacturer: integration

IA3212
Pin
Pin
24
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
9
ONHKMCAP
HLDCAP
HLFWV
VFCAP
SRVAN
SRVCT
LEDCT
Name
Name
HLDR
TXCT
TXAN
N.C.1
N.C.2
N.C.3
N.C.4
N.C.5
HKP
HKN
C1A
C1A
C1B
LR1
LR2
Vdd
Vss
C2
Type
Type
N/A
N/A
N/A
I/O
I/O
I/O
I/O
I/O
I/O
O
O
O
O
O
I
I
I
I
I
I
I
I
I
I
Function
Receive optical active bias time constant capacitor (15nF to C1B).
Function
Hold resistor (16.5Ω to Vss). All of the loop current, less 4.0mA, passes through this resistor.
This resistor value sets the 600Ω AC termination impedance, effects, and transhybrid balance.
Receiver LED cathode.
PCB layout must minimize capacitive coupling between this trace and the SRVAN and TXAN
traces.
Hold capacitor (68nF capacitor to Vss).
Positive hook switch driver output.
Negative hook switch driver input.
Not connected (LINPWR).
Half-wave / full-wave ring detection selection.
Connecting this pin to VDD selects half-wave ring detection (1 pulse/ring cycle). Disconnecting
this pin from VDD selects full wave ring detection (2 pulses/ring cycle).
Line Resistor (10MΩ resistor to bridge rectifier AC input).
Line Resistor (10MΩ resistor to bridge rectifier AC input).
Not connected (END).
Not connected (CEN).
Transmit automatic bias control circuit 1st low pass filter RC time constant capacitor (15nF
capacitor to C1B).
Transmit automatic bias control circuit low pass filter RC time constant capacitor (15nF capacitor
to C1A).
Not connected (BIASEN).
Transmit automatic bias control circuit 2nd low pass filter integrator response capacitor (150nF
capacitor to Vss).
Transmit cathode.
Transmit anode.
PCB layout must minimize capacitive coupling between this trace and the SRVAN and TXAN
traces.
On-hook Monitor Capacitor.
A series capacitor and resistor is tied from this pin to the bridge rectifier negative output. These
components are optional if Caller ID is not required.
Voltage to Frequency Converter Capacitor.
A 33 nF to 68 nF capacitor is tied between this pin and Vdd. A 10MΩ resistor is tied between this
pin and the bridge rectifier negative output to implement the line voltage to frequency oscillator.
This V/F function is optional and is only enabled while On-hook.
Not connected (HIN).
Receiver servo Anode.
PCB layout must minimize pickup from other signal sources.
Receiver servo cathode (input is clamped to about 2.7 V).
Line Side return/negative voltage supply.
Line Side return/positive voltage supply.
IA3211 & IA3212
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