Raymarine AIS4000 - Output Drive Capability of Bi-Directional Ports

Technical information
Page 64
Figure 29 Data output port schematic
6.2 Output drive capability of bi-directional ports
Bi-directional ports can supply an output current of up to 30mA. The output
voltages are 0 (low) and 3.3V (high). Effective load resistance should be in
excess of 100 Ohms.
Oscillator Rectier
Regulator
Decode
Digital isolation Transceiver
V
ISOIN
Encode
DecodeEncode
Decode
ADM2587E
RX_A
TxD
Vcc
DE
Y
Z
A
B
RxD
RE
RX
TX
From UART
Data output port
Isolation Barrier
RX_B
TX_A
TX_B
RX_COM
Encode
V
ISOOUT
DC to DC Converter
GND
1
GND
2
Each bi-directional data port is isolated from the other bi-
directional data ports and from the AIS transceiver’s
internal power supply.
!