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CAT24C256
Table 7. A.C. CHARACTERISTICS ? Mature Product (Rev D) (Notes 10, 11)
(V CC = 2.5 V to 5.5 V, T A = ? 40 ° C to +125 ° C, and V CC = 1.8 V to 5.5 V, T A = ? 40 ° C to +85 ° C, unless otherwise specified.)
Fast ? Plus
Standard
Fast
V CC = 2.5 V ? 5.5 V
T A = ? 40 5 C to +85 5 C
Symbol
Parameter
Min
Max
Min
Max
Min
Max
Units
F SCL
t HD:STA
t LOW
t HIGH
t SU:STA
t HD:DAT
t SU:DAT
t R (Note 12)
t F (Note 12)
t SU:STO
t BUF
t AA
t DH
T i (Note 12)
t SU:WP
t HD:WP
t WR
Clock Frequency
START Condition Hold Time
Low Period of SCL Clock
High Period of SCL Clock
START Condition Setup Time
Data In Hold Time
Data In Setup Time
SDA and SCL Rise Time
SDA and SCL Fall Time
STOP Condition Setup Time
Bus Free Time Between
STOP and START
SCL Low to Data Out Valid
Data Out Hold Time
Noise Pulse Filtered at SCL
and SDA Inputs
WP Setup Time
WP Hold Time
Write Cycle Time
4
4.7
4
4.7
0
250
4
4.7
100
0
2.5
100
1,000
300
3.5
100
5
0.6
1.3
0.6
0.6
0
100
0.6
1.3
100
0
2.5
400
300
300
0.9
100
5
0.25
0.55
0.25
0.25
0
50
0.25
0.5
50
0
1
1,000
100
100
0.50
100
5
kHz
m s
m s
m s
m s
m s
ns
ns
ns
m s
m s
m s
ns
ns
m s
m s
ms
t PU
(Notes 12, 13)
Power-up to Ready Mode
1
1
0.1
1
ms
10. The product Rev D is identified by letter “D” or a dedicated marking code on top of the package.
11. Test conditions according to “A.C. Test Conditions” table.
12. Tested initially and after a design or process change that affects this parameter.
13. t PU is the delay between the time V CC is stable and the device is ready to accept commands.
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
Table 8. A.C. TEST CONDITIONS
Input Levels
Input Rise and Fall Times
Input Reference Levels
Output Reference Levels
Output Load
0.2 x V CC to 0.8 x V CC
≤ 50 ns
0.3 x V CC , 0.7 x V CC
0.5 x V CC
Current Source: I L = 3 mA (V CC ≥ 2.5 V); I L = 1 mA (V CC < 2.5 V); C L = 100 pF
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