Datasheet

I
2
CInterfaceTimingRequirements
SwitchingCharacteristics
PCA9554A
www.ti.com ...........................................................................................................................................SCPS127D–SEPTEMBER2006–REVISEDAUGUST2008
overoperatingfree-airtemperaturerange(unlessotherwisenoted)(seeFigure10)
STANDARDMODEFASTMODE
I
2
CBUSI
2
CBUS
UNIT
MINMAXMINMAX
f
scl
I
2
Cclockfrequency01000400kHz
t
sch
I
2
Cclockhightime40.6µs
t
scl
I
2
Cclocklowtime4.71.3µs
t
sp
I
2
Cspiketime5050ns
t
sds
I
2
Cserial-datasetuptime250100ns
t
sdh
I
2
Cserial-dataholdtime00ns
t
icr
I
2
Cinputrisetime100020+0.1C
b
(1)
300ns
t
icf
I
2
Cinputfalltime30020+0.1C
b
(1)
300ns
t
ocf
I
2
Coutputfalltime10-pFto400-pFbus30020+0.1C
b
(1)
300ns
t
buf
I
2
CbusfreetimebetweenStopandStart4.71.3µs
t
sts
I
2
CStartorrepeatedStartconditionsetup4.70.6µs
t
sth
I
2
CStartorrepeatedStartconditionhold40.6µs
t
sps
I
2
CStopconditionsetup40.6µs
t
vd(data)
ValiddatatimeSCLlowtoSDAoutputvalid30050ns
ACKsignalfromSCLlowto
t
vd(ack)
ValiddatatimeofACKcondition0.33.450.10.9µs
SDA(out)low
C
b
I
2
Cbuscapacitiveload400400ns
(1)C
b
=TotalcapacitiveloadofonebusinpF
overoperatingfree-airtemperaturerange(unlessotherwisenoted)(seeFigure11andFigure12)
STANDARDMODEFASTMODE
FROMTO
I
2
CBUSI
2
CBUS
PARAMETERUNIT
(INPUT)(OUTPUT)
MINMAXMINMAX
t
iv
InterruptvalidtimePportINT44µs
t
ir
InterruptresetdelaytimeSCLINT44µs
t
pv
OutputdatavalidSCLP7–P0200200ns
t
ps
InputdatasetuptimePportSCL100100ns
t
ph
InputdataholdtimePportSCL11µs
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Not Recommended for New Designs