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MPR121 数据表(PDF) 9 Page - Freescale Semiconductor, Inc

部件名 MPR121
功能描述  Proximity Capacitive Touch Sensor Controller
PDF  13 Pages
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制造商  FREESCALE [Freescale Semiconductor, Inc]
网页  http://www.freescale.com
标志 FREESCALE - Freescale Semiconductor, Inc

MPR121 数据表(HTML) 9 Page - Freescale Semiconductor, Inc

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MPR121
Sensors
Freescale Semiconductor
9
I2C AC CHARACTERISTICS
Table 6. I2C AC Characteristics
(Typical Operating Circuit, VDD and VREG = 1.8 V, TA = 25°C, unless otherwise noted.)
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Serial Clock Frequency
fSCL
400
kHz
Bus Free Time Between a STOP and a START Condition
tBUF
1.3
μs
Hold Time, (Repeated) START Condition
tHD, STA
0.6
μs
Repeated START Condition Setup Time
tSU, STA
0.6
μs
STOP Condition Setup Time
tSU, STO
0.6
μs
Data Hold Time
tHD, DAT
0.9
μs
Data Setup Time
tSU, DAT
100
ns
SCL Clock Low Period
tLOW
1.3
μs
SCL Clock High Period
tHIGH
0.7
μs
Rise Time of Both SDA and SCL Signals, Receiving
tR
20+0.1Cb
300
ns
Fall Time of Both SDA and SCL Signals, Receiving
tF
20+0.1Cb
300
ns
Fall Time of SDA Transmitting
tF.TX
20+0.1Cb
250
ns
Pulse Width of Spike Suppressed
tSP
25
ns
Capacitive Load for Each Bus Line
Cb
400
pF



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