Type of   State of   Voltage     Voltage/current     Power available from 
Driver    Line       at no load  per driver (max)    3 driver outputs

1488      positive   +9..11V     +5V @ 6.5 mA        98 mW
1488      negative   -9..11V     -5V @ 6.5 mA        78 mW *
MAX232    positive   +7.5V..8V   +5V @ 5 mA          75 mW
MAX232    negative   -7.5..8V    -5V @ 3.5 mA        42 mW *
EIA-562   positive   +3.7..5V    +4.5V @ 1.5 mA      none
EIA-562   negative   -3.7..5V    -4.5V @ 1.5 mA      none