ml7012-04 Oki Optical Components, ml7012-04 Datasheet - Page 5

• Manufacturer Part Number: ml7012-04
• Description: 2400 Single Chip Full Duplex Data Modem With Protocol
• Manufacturer: Oki Optical Components

Analog Interface
PSTN Line Control Interface
1 Semiconductor
Symbol
Symbol
RCAO
AOUT
TXAN
TXAP
RLY1
RLY2
TXAI
GSR
SPK
RCI
AIN
SG
RII
I/O
I/O
O
O
O
O
O
O
O
O
O
I
I
I
I
Off-hook and pulse dial control signal output pin (*1)
0: On-hook or break state of pulse dial
1: Off-hook or make state of pulse dial
When PDN/RST = “0”, RLY1 outputs “0”.
The control signal output pin to disconnect interlinked telephones (*1)
0: PSTN is connected with interlinked telephones
1: PSTN is disconnected with interlinked telephones but connected with modem
When PDN/RST = “0”, RLY2 outputs “0”.
Incoming signal input pin (*2)
Input “0” while detecting an incoming signal
Input “1” while not detecting an incoming signal
Fix this pin to "1" when a ring detector is not used.
Speaker control signal output pin
0: speaker On
1: speaker Off
When PDN/RST = “0”, SPK outputs “1”.
Transmit analog output pin
When PDN/RST = “0”, AOUT is in a high impedance state.
Operational amplifier input pin constituting transmit RC active
Operational amplifier output pin constituting transmit RC active
When PDN/RST = “0”, RCAO is in a high impedance state.
Input pin of the line transformer drive amplifier
Output pin of the line transformer drive amplifier (1)
When PDN/RST = “0”, TXAN is in a high impedance state.
Output pin of the line transformer drive amplifier (2)
When PDN/RST = “0”, TXAP is in a high impedance state.
Input pin of the receive input amplifier
Output pin of the receive input amplifier
When PDN/RST = “0”, GSR is in a high impedance state.
Pin to connect capacitors for the SG circuit
When PDN/RST = “0”, SG is in a high impedance state.
Description
Description
FEDL 7012-04-01
ML7012-04
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