X1227
AC Specifications (T = -40°C to +85°C, VCC = +2.7V to +5.5V, unless otherwise specified.)
A
Symbol
Parameter
Min.
Max. Units
f
SCL Clock Frequency
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(1)
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
Data In Setup Time
0.6
SU:STA
HD:STA
SU:DAT
HD:DAT
SU:STO
t
t
0.6
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(2)
20 +.1Cb(2)
300
300
400
R
t
SDA and SCL Fall Time
F
Cb
Capacitive load for each bus line
Notes: (1) This parameter is not 100% tested.
(2) Cb = total capacitance of one bus line in pF.
TIMING DIAGRAMS
Bus Timing
t
t
t
t
R
F
HIGH
LOW
SCL
t
SU:DAT
t
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. 18 of 28
REV 1.1.20 1/13/03
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XICOR [ XICOR INC. ]
