MAS9191EB Ver la hoja de datos (PDF) - Micro Analog systems
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fabricante
MAS9191EB Datasheet PDF : 16 Pages
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CONNECTOR DESCRIPTION
DA9191EB.006
June 30,1997
Connector name
TX
T6
T7
RX
T8
T9
T10
T11
EXTEARP
EARP
BUZZER
DACs
OSCOUT
J3
CTRL
Pin
Function
BNC-type connector for IF output.
1
TX output signal, which can contain data, audio, SAT and Signalling tone.
2
Ground.
Output of the peak level detector circuit for MICOUT. See Op Amp schematic.
Output of the peak level detector circuit for EXPIN. See Op Amp schematic.
BNC-type connector for received IF signal.
1
RX signal input from the external IF source.
2
Ground.
DEOUT is the de-emphasis filter output. The output can be used to measure blocks GC1,
F1, F3 and F4. Special test modes can be used to connect the outputs of the filter F2 and
comparators C1 and C2 to this output.
RBPFIN input.
EXPIN is the test point where expander input can be measured.
EXPOUT test point can be used to measure the expander output.
BNC-type connector for external ear piece.
1
The output signal for the external ear piece.
2
Ground.
Connector for the ear piece. Note that there are already capacitors C41 and
C42 connected to the ground on each output signal.
1
Differential output for the ear piece.
2
Differential output for the ear piece.
Buzzer interface. Connect the external buzzer between these points.
1
Power supply voltage from connector T1.
2
Q1 collector.
This connector contains the MAS9191A DAC outputs. MAS9191A has three 8-bit DACs.
DAC1 Output of DAC 1. This output is also connected to Vcont input of the VCTCXO.
DAC2 Output of DAC 2.
DAC3 Output of DAC 3.
GROUND System ground.
MS8323 VCTCXO output frequency
Use jumper to connect DAC1 output to MS8323 Vcont input.
TXON Transmission is active when output is high.
BUSY RECC is busy if pin is low.
TXCTRL Open-drain type output. The output goes low when a transmit collision occurs.
In any other case the output is in a high impedance state.
6
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