
6
www.fairchildsemi.com
FMS6501 Rev. 1A
F
I
2
C BUS Characteristics
T
c
= 25°C, V
cc
= 5V; unless otherwise noted.
Symbol
Digital Input Low
1
Digital Input High
1
Notes:
1. 100% tested at 25°C
Figure 1: I
2
C Bus Timing
Parameter
Conditions
Min.
Typ.
Max
Units
V
il
V
ih
f
scl
tr
SDA, SCL, ADDR
0
1.5
V
cc
V
SDA, SCL, ADDR
3.0
V
Clock Frequency
SCK
100
kHz
Input Rise Time
1.5V to 3V
1000
nS
tf
Input Fall Time
1.5V to 3V
300
nS
t
low
t
high
t
SU,DAT
t
HD,DAT
t
SU,STO
t
BUF
t
HD,STA
t
SU,STA
Clock Low Period
4.7
uS
Clock High Period
4.0
uS
Data Set-up Time
300
nS
Data Hold Time
0
nS
Set-up Time from Clock High to Stop
4
uS
Start Set-up Time following a Stop
4.7
uS
Start Hold Time
4
uS
Start Set-up Time following Clock Low to High
4.7
uS
SDA
SCL
SDA
tBUF
tLOW
tf
tHD,STA
tr
tHD,DAT
tHIGH
tSU,DAT
tSU,STO
tSU,STA