X1202
AC SPECIFICATIONS (T = -40°C to +85°C, V
= +2.7V to +5.5V, unless otherwise specified.)
A
CC
Symbol
Parameter
Min.
Max. Unit
f
SCL clock frequency
0
400
kHz
ns
µs
µs
µs
µs
µs
µs
ns
µs
µs
ns
ns
ns
pF
SCL
t
Pulse width suppression time at inputs
SCL LOW to SDA data out valid
Time the bus must be free before a new transmission can start
Clock LOW time
50
IN
t
0.1
0.9
AA
t
1.3
BUF
t
1.3
LOW
t
Clock HIGH time
0.6
HIGH
t
Start condition setup time
Start condition hold time
0.6
SU:STA
HD:STA
SU:DAT
HD:DAT
SU:STO
t
t
0.6
Data in setup time
100
t
t
Data in hold time
0
Stop condition setup time
Data output hold time
0.6
t
50
DH
t
SDA and SCL rise time
20 +.1Cb(3)
20 +.1Cb(3)
300
300
400
R
t
SDA and SCL fall time
F
Cb
Capacitive load for each bus line
Notes: (1) Typical values are for T = 25°C and V = 5.0V
A
CC
(2) This parameter is periodically sampled and not 100% tested.
(3) Cb = total capacitance of one bus line in pF.
TIMING DIAGRAMS
Bus Timing
t
t
t
t
R
F
HIGH
LOW
SCL
t
t
SU:DAT
t
t
SU:STO
SU:STA
HD:DAT
t
HD:STA
SDA IN
t
t
t
BUF
AA
DH
SDA OUT
Characteristics subject to change without notice. 17 of 23
REV 1.1.8 5/17/01
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