
X24C04
Characteristics subject to change without notice. 11 of 13
REV 1.1 7/12/00
www.xicor.com
NOT RECOMMENDED
FOR NEW DESIGNS
Guidelines for Calculating Typical Values of Bus
Pull-Up Resistors
SYMBOL TABLE
120
100
80
40
60
20
20 40 60 80
100 120
0
0
Resistance (KΩ)
Bus Capacitance (Pf)
Min.
Resistance
Max.
Resistance
R
MAX
=
C
BUS
t
R
R
MIN
=
I
OL Min.
V
CC Max.
=1.8KΩ
WAVEFORM INPUTS OUTPUTS
Must be
steady
Will be
steady
May change
from Low to
High
Will change
from Low to
High
May change
from High to
Low
Will change
from High to
Low
Don’t Care:
Changes
Allowed
Changing:
State Not
Known
N/A Center Line
is High
Impedance
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