TCN75A
SERIAL INTERFACE TIMING SPECIFICATIONS (NOTE 1)
Electrical Specifications:
Unless otherwise indicated, V
DD
= 2.7V to 5.5V, GND = Ground, T
A
= -40°C to +125°C,
C
L
= 80 pF and all limits measured to 50% point.
Parameters
Serial Port Frequency
Clock Period
Low Clock
High Clock
Rise Time
Fall Time
Data Setup Before SCL High
Data Hold After SCL Low
Start Condition Setup Time
Start Condition Hold Time
Stop Condition Setup Time
Bus Idle
Note 1:
Sym
f
SC
t
SC
t
LOW
t
HIGH
t
R
t
F
t
SU-DATA
t
H-DATA
t
SU-START
t
H-START
t
SU-STOP
t
B-FREE
Min
0
2.5
1.3
0.6
20
20
0.1
0
0.6
0.6
0.6
1.3
Typ
—
—
—
—
—
—
—
—
—
—
—
—
Max
400
—
—
—
300
300
—
—
—
—
—
—
Units
kHz
μs
μs
μs
ns
ns
μs
μs
μs
μs
μs
μs
10% to 90% of V
DD
(SCL, SDA)
90% to 10% of V
DD
(SCL, SDA)
Conditions
2-Wire I
2
C™ Compatible Interface
Specification limits are characterized but not product tested.
Timing Diagram
-S
T
t
H ART
-S
TA
R
T
P
IG
H
-S
TO
U
O
W
EE
t
S
t
H
SD
A
SC
L
-D
AT
A
U
t
S
Start Condition
t
H
Data Transmission
-D
AT
A
t
R
,t
F
t
L
Stop Condition
DS21935C-page 4
©
2006 Microchip Technology Inc.
t
S
t
B
-F
R
U
MICROCHIP [ MICROCHIP TECHNOLOGY ]
