CRX14_10 Datasheet, PDF (36/47 Pages) STMicroelectronics – ISO14443 type-B contactless coupler chip with anti-collision, CRC management and anti-clone function

DC and AC parameters
9
DC and AC parameters
CRX14
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
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.
Unit
5.5
V
85
°C
50
ns
0.8V_CC
V
0.7V_CC
V
Figure 33. I²C AC testing I/O waveform
0.8VCC
0.7VCC
0.2VCC
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)
0.3VCC
AI09235
Min. Max. Unit
8
pF
6
pF
100 400 ns
1. Sampled only, not 100% tested.
2. T_A = 25 °C, f = 400kHz.
Table 11. I²C DC characteristics
Symbol
Parameter
Test condition
I_LI
Input Leakage Current
(SCL, SDA, E0, E1, E2)
I_LO
Output Leakage Current
(SCL, SDA, E0, E1, E2)
0V V_IN  V_CC
0V  V_OUT  V_CC, SDA in Hi-Z
Min.
Max. Unit
±2 µA
±2 µA
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Doc ID 8880 Rev 4