COM20019I_06 Datasheet, PDF (47/65 Pages) SMSC Corporation – Low Cost ARCNET (ANSI 878.1) Controller with 2K x 8 On-Board RAM

Low Cost ARCNET (ANSI 878.1) Controller with 2K x 8 On-Board RAM
CAPACITANCE (T_A = 25°C; f_C = 1MHz; V_DD = 0V)
Output and I/O pins capacitive load specified as follows:
PARAMETER
SYMBOL MIN TYP
Input Capacitance
Output Capacitance 1
(All outputs except
XTAL2, nPULSE1 in
Push/Pull Mode)
Output Capacitance 2
(nPULSE1, in BackPlane
Mode Only - Open
Drain)
C_IN
C_OUT1
C_OUT2
MAX
5.0
45
400
UNIT
pF
pF
pF
COMMENT
Maximum
Capacitive Load
which can be
supported by each
output.
AC Measurements are taken at the following points:
2.4V
1.4V
0.4V
2.4V
1.4V
0.4V
Inputs:
t
50%
t
50%
2.0V
0.8V
2.0V
0.8V
Outputs:
t
t
Inputs are driven at 2.4V for logic "1" and 0.4 V for logic "0" except XTAL1 pin.
Outputs are measured at 2.0V min. for logic "1" and 0.8V max. for logic "0".
Figure 7.1 - AC MEASUREMENTS
SMSC COM20019I
Page 47
DATASHEET
Rev. 03-07-06