41.4.18 I²C Bus Data Requirements

Table 41-24.
Standard Operating Conditions (unless otherwise stated)
Param. No.	Sym.	Characteristic		Min.	Max.	Units	Conditions
SP100*	T_HIGH	Clock high time	100 kHz mode	4000	—	ns	Device must operate at a minimum of 1.5 MHz
SP100*	T_HIGH	Clock high time	400 kHz mode	600	—	ns	Device must operate at a minimum of 10 MHz
SP101*	T_LOW	Clock low time	100 kHz mode	4700	—	ns	Device must operate at a minimum of 1.5 MHz
SP101*	T_LOW	Clock low time	400 kHz mode	1300	—	ns	Device must operate at a minimum of 10 MHz
SP102*	T_R	SDA and SCL rise time	100 kHz mode	—	1000	ns
SP102*	T_R	SDA and SCL rise time	400 kHz mode	20	300	ns	C_B is specified to be from 10-400 pF
SP103*	T_F	SDA and SCL fall time	100 kHz mode	—	250	ns
SP103*	T_F	SDA and SCL fall time	400 kHz mode	20 × (V_DD/5.5V)	250	ns	C_B is specified to be from 10-400 pF
SP106*	T_HD:DAT	Data input hold time	100 kHz mode	0	—	ns
SP106*	T_HD:DAT	Data input hold time	400 kHz mode	0	—	ns
SP107*	T_SU:DAT	Data input setup time	100 kHz mode	250	—	ns	(Note 2)
SP107*	T_SU:DAT	Data input setup time	400 kHz mode	100	—	ns	(Note 2)
SP109*	T_AA	Output valid from clock	100 kHz mode	—	3450	ns	(Note 1)
SP109*	T_AA	Output valid from clock	400 kHz mode	—	900	ns	(Note 1)
SP110*	T_BUF	Bus free time	100 kHz mode	4700	—	ns	Time the bus must be free before a new transmission can start
SP110*	T_BUF	Bus free time	400 kHz mode	1300	—	ns
SP111	C_B	Bus capacitive loading	100 kHz mode	—	400	pF
SP111	C_B	Bus capacitive loading	400 kHz mode	—	400	pF
* These parameters are characterized but not tested. Note: As a transmitter, the device must provide this internal minimum delay time to bridge the undefined region (min. 300 ns) of the falling edge of SCL to avoid unintended generation of Start or Stop conditions. A Fast mode (400 kHz) I²C bus device can be used in a Standard mode (100 kHz) I²C bus system, but the requirement T_SU:DAT ≥ 250 ns 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. + T_SU:DAT = 1000 + 250 = 1250 ns (according to the Standard mode I²C bus specification), before the SCL line is released. Using internal I²C pull-ups. For greater bus capacitance use external pull-ups.

41.4.18 I2C Bus Data Requirements

41.4.18 I²C Bus Data Requirements