SMH4042
MEMORY AC OPERATING CHARACTERISTICS
TA = -40°C to +85°C
2.7V to 4.5V
4.5V to 5.5V
Symbol
Parameter
Conditions
Min
Max
Min
Max
Units
fSCL
SCL Clock Frequency
Clock Low Period
0
100
0
400
KHz
ms
ms
ms
ms
ms
ms
ms
ms
ns
tLOW
tHIGH
tBUF
4.7
4.0
4.7
4.7
4.0
4.7
0.3
0.3
1.3
0.6
1.3
0.6
0.6
0.6
0.2
0.2
Clock High Period
Bus Free Time
Before New Transmission
tSU:STA
tHD:STA
tSU:STO
tAA
Start Condition Setup Time
Start Condition Hold Time
Stop Condition Setup Time
Clock Edge to Valid Output
Data Out Hold Time
SCL and SDA Rise Time
SCL and SDA Fall Time
Data In Setup Time
SCL low to Valid SDA (cycle n)
3.5
0.9
tDH
SCL low (cycle n+1) to SDA change
tR
1000
300
300
300
tF
ns
tSU:DAT
tHD:DAT
TI
250
0
100
0
ns
Data In Hold Time
ns
Noise Filter SCL & SDA
Write Cycle Time
Noise Suppression
100
5
100
5
ns
tWR
ms
2037 PGM T5.1
tHIGH
tLOW
tR
tF
SCL
tSU:SDA
tHD:SDA
tBUF
tSU:STO
tSU:DAT
tHD:DAT
SDA In
tAA
tDH
SDA Out
2037 ILL11.0
S
T
A
R
S
T
Typical Write Operation
O
P
Master
SDA
T
R
/
W
A A
2 1
B
0
A A
7 6
A
5
A
4
A
3
A
2
A
1
A
0
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
D
7
D
6
D
1
D
0
A
C
K
A
C
K
A
C
K
A
C
K
Slave
S
T
A
R
T
Typical Read Operation
S
T
A
C
K
A
C
K
Master
SDA
O
P
R
/
W
A A
2 1
B
0
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
D
7
D
6
D
1
D
0
A
C
K
Slave
2037 ILL12.0
2037 8.0 8/8/00
6
SUMMIT [ SUMMIT MICROELECTRONICS, INC. ]
