X24257 Datasheet, PDF (14/19 Pages) Xicor Inc. – 400kHz 2-Wire Serial EEPROM with Block Lock

X24257 – Preliminary Information
Write Cycle Timing
SCL
ct ^SDA
8^th Bit
Word n
ACK
t_WC
Stop
Condition
Start
Condition
du ^{Guidelines for Calculating Typical Values of Bus}
Pull-Up Resistors
o ₁₂₀
r ¹⁰⁰
P ⁸⁰
R_{MIN =} ^{VCC Max.}
I_OL Min
R_MAX
= ^tR
C_BUS
SYMBOL TABLE
WAVEFORM INPUTS
OUTPUTS
Must be
steady
May change
from Low to
Will be
steady
Will change
from Low to
60
Max.
Resistance
40
20 _Min.
e ^Resistance
0
0 20 40 60 80 100 120
bsolet ^{Bus Capacitance (pF)}
High
May change
from High to
Low
Don’t Care:
Changes
Allowed
N/A
High
Will change
from High to
Low
Changing:
State Not
Known
Center Line
is High
Impedance
O
REV 1.1.1 10/15/00
www.xicor.com
Characteristics subject to change without notice. 14 of 19