X24012 Datasheet, PDF (11/14 Pages) Xicor Inc. – Serial E2PROM

X24012
WRITE CYCLE LIMITS
Symbol
t_WR(6)
Parameter
Write Cycle Time
Min.
Typ.⁽⁵⁾
5
Max.
10
Units
ms
3847 PGM T10
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 X24012
bus interface circuits are disabled, SDA is allowed to
remain high, and the device does not respond to its slave
address.
Write Cycle Timing
SCL
SDA
8th BIT
WORD n
ACK
STOP
CONDITION
tWR
START
CONDITION
X24012
ADDRESS
3847 FHD F04
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
120
100
RMIN =
VCC _MAX
IOL _MIN
=1.8KΩ
80
RMAX
=
tR
CBUS
60
MAX.
RESISTANCE
40
20 _MIN.
RESISTANCE
0
0 20 40 60
80 100 120
BUS CAPACITANCE (pF) _{3847 FHD F16}
SYMBOL TABLE
WAVEFORM
INPUTS
Must be
steady
May change
from Low to
High
May change
from High to
Low
Don’t Care:
Changes
Allowed
N/A
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
11