CRX14_05 Datasheet, PDF (31/40 Pages) STMicroelectronics – Low Cost ISO14443 type-B Contactless Coupler Chip with Anti-Collision, CRC Management and Anti-Clone Function

CRX14
DC AND AC PARAMETERS
This section summarizes the operating and mea-
surement conditions, and the DC and AC charac-
teristics of the device. The parameters in the DC
and AC Characteristic tables that follow are de-
rived from tests performed under the Measure-
ment 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 parame-
ters.
Table 9. I²C AC Measurement Conditions
Parameter
V_CC Supply Voltage
Ambient Operating Temperature (T_A)
Input Rise and Fall Times
Input Pulse Voltages
Input and Output Timing Reference Voltages
Min.
4.5
−20
0.2V_CC
0.3V_CC
Max.
5.5
85
50
0.8V_CC
0.7V_CC
Unit
V
°C
ns
V
V
Figure 34. I²C AC Testing I/O Waveform
0.8VCC
0.7VCC
0.2VCC
0.3VCC
AI09235
Table 10. I²C Input Parameters^(1,2)
Symbol
Parameter
C_IN
Input Capacitance (SDA)
C_IN
Input Capacitance (SCL, E0, E1, E2))
t_NS
Low Pass Filter Input Time Constant (SCL & SDA Inputs)
Note: 1. Sampled only, not 100% tested.
2. T_A = 25 °C, f = 400kHz.
Test Condition
Min.
100
Max. Unit
8
pF
6
pF
400 ns
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