X24320 Datasheet, PDF (13/17 Pages) Xicor Inc. – 400KHz 2-Wire Serial E2PROM with Block Lock

X24320
Bus Timing
SCL
SDA IN
t
SU:STA
t
F
t
HIGH
t
LOW
t
HD:STA
t
HD:DAT
t
SU:DAT
t
R
t
SU:STO
t
t
AA
DH
t
BUF
SDA OUT
7035 FM 14
Write Cycle Limits
Symbol
t_WC ⁽⁶⁾
Parameter
Write Cycle Time
Min.
Typ.⁽⁵⁾
5
Max.
10
Units
ms
Notes: (5)Typical values are for TA = 25°C and nominal supply voltage (5V).
(6)tWR is the minimum cycle time to be allowed from the system perspective unless polling techniques are used. It is the maximum
time the device requires to automatically complete the internal write operation.
7003 FRM T11
The write cycle time is the time from a valid stop condition of a write sequence to the end of the internal erase/write cycle.
During the write cycle, the X24320 bus interface circuits are disabled, SDA is allowed to remain HIGH, and the device does
not respond to its slave address.
Bus Timing
SCL
SDA
8th BIT
WORD n
ACK
t
WC
STOP
CONDITION
START
CONDITION
Guidelines for Calculating Typical Values of
Bus Pull-Up Resistors
120
100
80
60
40
V
R
MIN
= ^{CC MAX}
I
OL MIN
t
R
MAX
=^R
C
BUS
MAX.
RESISTANCE
=1.8KΟ
20 _MIN.
RESISTANCE
0
0 20 40 60
80 100120
BUS CAPACITANCE (pF)
7035 FM 16
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
7035 FM 15
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 _{7035 FM 17}
13