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CR14 Datasheet(PDF) 36 Page - STMicroelectronics

Part # CR14
Description  Low Cost ISO14443 type-B Contactless Coupler Chip with Anti-Collision and CRC Management
PDF  46 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

CR14 Datasheet(HTML) 36 Page - STMicroelectronics

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9 DC and AC parameters
CR14
36/46
9
DC and AC parameters
This section summarizes the operating and measurement conditions, and the DC and AC
characteristics of the device. The parameters in the DC and AC Characteristic tables that follow
are derived from tests performed under the Measurement Conditions summarized in the
relevant tables. Designers should check that the operating conditions in their circuit match the
measurement conditions when relying on the quoted parameters.
Table 9.
I²C AC Measurement Conditions
Figure 33. I²C AC Testing I/O Waveform
Table 10.
I²C Input Parameters(1,2)
1.
Sampled only, not 100% tested.
2.
TA = 25 °C, f = 400kHz.
Parameter
Min.
Max.
Unit
V
CC Supply Voltage
4.5
5.5
V
Ambient Operating Temperature (T
A)
–20
85
°C
Input Rise and Fall Times
50
ns
Input Pulse Voltages
0.2VCC
0.8VCC
V
Input and Output Timing Reference Voltages
0.3VCC
0.7VCC
V
Symbol
Parameter
Test Condition
Min.
Max.
Unit
C
IN
Input Capacitance (SDA)
8
pF
C
IN
Input Capacitance (SCL, E0, E1, E2))
6
pF
t
NS
Low Pass Filter Input Time Constant (SCL & SDA
Inputs)
100
400
ns
AI09235
0.8VCC
0.2VCC
0.7VCC
0.3VCC



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