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