I
IS
ISP
ICLK
ICLK2
OCLK2
O4
O8
OD8
O8SR
O16
OD16
O24
OD24
OD48
BUFFER TYPE DESCRIPTIONS
Input, TTL compatible.
Input with Schmitt trigger
Input with Schmitt trigger, 90uA pull-up.
Input to crystal oscillator circuit (CMOS levels)
Crystal input
Output to external crystal
Output, 4mA sink, 2mA source.
Output, 8mA sink, 4mA source.
Open Drain Output, 8mA sink.
Output, 8mA sink, 4mA source with Slew Rate Limiting
Output, 16mA sink, 8mA source.
Open Drain Output, 16mA sink.
Output, 24mA sink, 12mA source.
Open Drain Output, 24mA sink.
Open Drain Output, 48mA sink
SMSC DS – FDC37N958FR
Page 12
Rev. 09/01/99