12.5 Noise Suppression

Pulses of short duration on SCL/CLK, SDA/IO and RST are ignored if they fall below the threshold of this circuit. These pulses are filtered out, and the device does not enter the reset sequence.

Table 12-1. Tamper DetectionApplicable over the recommended operating range from T_AC = -40°C to +85°C (unless otherwise noted).
Symbol	Parameter	Test Condition	Min.	Max.	Units
V_CC	High Voltage Limit		6.0	6.5	V
V_CC	Low Voltage Limit		2.0	2.4	V
t_CLK	Minimum CLK Pulse Width	Synchronous Operation	200	280	ns
f_CLK	Minimum CLK Frequency	Asynchronous Operation	12	14	MHz
t_POR	POR Delay		10	70	μs
t_SUP	Min. SCL, SDA, RST Pulse		50	200	ns

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