FM24W256 Ramtron, FM24W256 Datasheet - Page 9

• Manufacturer Part Number: FM24W256
• Description: 256Kb Wide Voltage Serial F-RAM
• Manufacturer: Ramtron

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AC Parameters (T
Notes : All SCL specifications as well as start and stop conditions apply to both read and write operations.
1
2
Capacitance (T
Notes
1
Power Cycle Timing
Power Cycle Timing (T
Notes
Rev. 1.3
July 2011
Symbol
f
t
t
t
t
t
t
t
t
t
t
t
t
t
C
C
t
t
t
t
Symbol
Symbol
LOW
HIGH
AA
BUF
HD:STA
SU:STA
HD:DAT
SU:DAT
R
F
SU:STO
DH
SP
PU
PD
VR
VF
SCL
I/O
IN
The speed-related specifications are guaranteed characteristic points along a continuous curve of operation from
DC to 1 MHz.
This parameter is periodically sampled and not 100% tested.
This parameter is periodically sampled and not 100% tested.
1.
Slope measured at any point on V
Parameter
SCL Clock Frequency
Clock Low Period
Clock High Period
SCL Low to SDA Data Out Valid
Bus Free Before New Transmission
Start Condition Hold Time
Start Condition Setup for Repeated
Start
Data In Hold
Data In Setup
Input Rise Time
Input Fall Time
Stop Condition Setup
Data Output Hold
(from SCL @ V
Noise Suppression Time Constant
on SCL, SDA
Parameter
Input/Output Capacitance (SDA)
Input Capacitance
Parameter
Power Up (V
Last Access (Stop condition) to Power Down (V
V
V
DD
DD
SDA,SCL
A
V
Rise Time
Fall Time
= 25 C, f=1.0 MHz, V
DD
A
= -40 C to + 85 C, V
A
DD
= -40 C to +85 C, V
IL
min) to First Access (Start condition)
)
t
VR
V
t
DD
PU
DD
DD
waveform.
min.
DD
= 3V)
=2.7V to 5.5V unless otherwise specified)
DD
Max
= 2.7V to 5.5V unless otherwise specified)
Min
250
8
6
4.7
4.0
4.7
4.0
4.7
4.0
0
0
0
1000
Units
Max
100
300
50
pF
pF
DD
3
min)
FM24W256 - 256Kb Wide Voltage I2C F-RAM
Min
100
1.3
0.6
1.3
0.6
0.6
0.6
Notes
0
0
0
1
1
Max
400
300
300
Min
0.9
100
50
10
30
0
t
PD
Min
0.25
0.25
0.25
100
0.6
0.4
0.5
0
0
0
Max
-
-
-
-
t
Max
1000
VF
0.55
300
100
50
Units


ms

s/V
s/V
Units
kHz
s
s
s
s
s
s
s
ns
ns
ns
ns
s
ns
ns
Page 9 of 13
Notes
Notes
1
1
1
2
2
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