X24022
WRITE CYCLE LIMITS
Symbol
t
WR(6)
Parameter
Write Cycle Time
Min.
Typ.
(5)
5
Max.
10
Units
ms
3848 PGM T08
The write cycle time is the time from a valid stop
condition of a write sequence to the end of the internal
erase/program cycle. During the write cycle, the X24022
Write Cycle Timing
bus interface circuits are disabled, SDA is allowed to
remain high, and the device does not respond to its slave
address.
SCL
SDA
8th BIT
WORD n
ACK
tWR
STOP
CONDITION
START
CONDITION
X24022
ADDRESS
3848 FHD F05
Notes:
(5) Typical values are for T
A
= 25°C and nominal supply voltage (5V)
(6) t
WR
is the minimum cycle time from the system perspective when polling techniques are not used. It is the maximum time the
device requires to perform the internal write operation.
Guidelines for Calculating Typical Values of
Bus Pull-Up Resistors
SYMBOL TABLE
WAVEFORM
INPUTS
Must be
steady
OUTPUTS
Will be
steady
Will change
from Low to
High
Will change
from High to
Low
Changing:
State Not
Known
Center Line
is High
Impedance
120
RESISTANCE (KΩ)
100
80
60
40
20
0
0
RMIN =
VCC MAX
IOL MIN
tR
CBUS
=1.8KΩ
RMAX =
May change
from Low to
High
May change
from High to
Low
Don’t Care:
Changes
Allowed
MAX.
RESISTANCE
MIN.
RESISTANCE
20
40
60
80 100 120
3848 FHD F17
N/A
BUS CAPACITANCE (pF)
11
XICOR [ XICOR INC. ]
