W89C940 Datasheet, PDF (60/61 Pages) Winbond – ELANC-PCI (TWISTED-PAIR ETHER-LAN CONTROLLER WITH PCI INTERFACE)

W89C940
Pin Capacitance
TA = 25°C f = 1 MHz
DOP
DON
R=270
R=78
R=270
SYMBOL
C_IN
C_OUT
PARAMETER
Input Capacitance
Output Capacitance
TYP
7
10
UNIT
pF
p
DERATING FACTOR
Output timing is measured with a purely capacitive load of 50pF or 240pF.
The following correction factor can be used for other loads (this factor is preliminary only):
Derating for 3SL, MOS = -0.05 nS/pF.
Derating for 3SH, OCL, TPI = -0.03 nS/pF.
AUI TRANSMIT TEST LOAD
Note: In the above diagram, the TX+ and TX- signals are taken from the AUI side of the pulse transformer.
The pulse transformer used for all testing is a 100µH +/-0.1% Pulse Engineering PE64103.
PACKAGE DIMENSIONS
60