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STV0196 датащи(PDF) 15 Page - STMicroelectronics

номер детали STV0196
подробное описание детали  QPSK/BPSK DEMODULATOR AND FEC IC
PDF  23 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
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STV0196 датащи(HTML) 15 Page - STMicroelectronics

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I
2C BUS CHARACTERISTICS (see Figure 9)
Symbol
Parameter
Test Conditions
Min.
Typ. Max.
Unit
VIL
VIH
Input Logic Low Voltage
Input Logic High Voltage
See Note 1
-0.3
2.0
0.8
5.5
V
V
VOL
VOH
Output Logic Low Voltage
Output Logic High Voltage
CLOAD = 20pF, ILOAD = 2mA,
M_CLK = 60MHz, see Note 1
2.4
0.5
5.5
V
V
ILK
Input Leakage Current
VIN =0V to VDD, see Note 2
-10
10
µA
CIN
Input Capacitance
3.5
pF
IOL
Output Sink Current
VOL = 0.5V
10
mA
tSP
Pulse W idt h of Spikes which must be
suppressed by the Input filter
050
ns
fSCL
SCL Clock Frequency
0
400
kHz
tBUF
Bus Free Time between a STOP and START
Condition
1.3
µs
tHD,STA
Hold Time (repeated) START Condition. After
this period, the first clock pulse is generated.
0.6
µs
tLOW
tHIGH
Low Period of the SCL Clock
High Period of the SCL Clock
1.3
0.6
µs
µs
tSU,STA
Set-up Time for a repeated START Condition
0.6
µs
tSU,STO
Set-up Time for STOP Condition
0.6
µs
tHD,DAT
Data Hold Time
See Note 3
0
0.9
µs
tSU,DAT
Data Set-up Time
See Note 4
100
ns
tR,tF
Rise and Fall Time of both SDA and SCL
signals
See Note 5
20 +
0.1 CB
300
ns
CB
Capacitive Load for each Bus Line
400
pF
Notes : 1.
An impedance higher than 2k
Ω is required when SDA and SCL are tied to a 5V ± 10% voltage line.
2.
Leakage current exceeds
± 10µA when SDA and SCL are tied to a 5V ± 10% line.
3.
A device must internally provide a hold time of at least 300ns for the SDA signal (refered to the VIH Min. of the SCL signal) in order
to bridge the undefined region of the falling edge of SCL.
The maximum tHD,DAT has only to be met if the device does not stretch the low period (tLOW) of the SCL signal.
4.
A fast-mode I
2C bus device can be used in a standard-mode I2C bus system, but the requirement tSU,DAT
≥ 250ns must then be
met. This will automatically be the case if the device does not stretch the low period of the SCL signal. If such a device does
stretch the low period of the SCL signal, it must output the next data bit to the SDA line tR Max. +tSU,DAT = 1000 +250 = 1250ns
(according to the standard-mode I
2C bus specification) before the SCL line is released.
5.
CB = total capacitance of one bus line in pF.
STV0196B
15/23



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