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STFPC320 Datasheet(PDF) 73 Page - STMicroelectronics

Part # STFPC320
Description  Front panel controller/driver with standby power management and real-time clock
PDF  78 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STFPC320 Datasheet(HTML) 73 Page - STMicroelectronics

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STFPC320
Electrical characteristics
73/78
17.8
Switching characteristics
Table 20.
Switching characteristics
(TA = -20 to +70 °C, VDD = 3.3V, VSS = -30V)
Symbol
Parameter
Min
Typ
Max
Units
fSCL
SCL clock frequency
0
400
kHz
tLOW
Clock low period
1.3
μs
tHIGH
Clock high period
600
ns
tR
SDA and SCL rise time
300
ns
tF
SDA and SCL fall time
300
ns
tHD:STA
START condition hold time
(After this period the first clock pulse is generated)
600
ns
tSU:STA
START condition setup time
(only relevant for a repeated start condition)
600
ns
tSU:DAT
Data setup time (1)
1.
Transmitter must internally provide a hold time to bridge the undefined region (300ns max) of the falling
edge of the SCL.
100
ns
tHD:DAT
Data hold time
0
μs
tSU:STO
STOP condition setup time
600
ns
tBUF
Time the bus must be free before a new
transmission can start
1.3
μs
trec
Watchdog output pulse width
96
98
ms
tUNMUTE
Time delay of turning off MUTE after READY is
set high
10
80
ns
tMUTE
Time delay of turning on MUTE before STBY is
set high
10
80
ns
Table 21.
Switching characteristics (TA = -20 to +70 °C, VDD = 3.3V, VSS = -30V)
Symbol
Parameter
Test conditiong
Min.
Typ.
Max.
Unit
tOSC
Oscillation frequency R = 33 k
Ω ± 1%
430
500
565
kHz
tPLZ
Propagation delay
time
CLK -> SDA
CL = 15pF, RL = 10kΩ
300
ns
tPZL
100
ns
tTZH1
Rise time
CL = 300pF
Seg1 to Seg12
2
μs
tTZH2
Grid1 to Grid8,
Seg13/Grid16 to
Seg20/Grid9
0.5
μs
tTHZ
Fall time
CL = 300pF, Segn, Gridn
120
μs
CI
Input capacitance
15
pF



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