4.4 AC Characteristics

Table 4-3. AC Characteristics⁽¹⁾
Parameter	Symbol	Standard Mode		Fast Mode		Fast Mode Plus		Units
		V_CC = 1.7V to 5.5V		V_CC = 1.7V to 5.5V		V_CC = 2.5V to 5.5V
		Min.	Max.	Min.	Max.	Min.	Max.
Clock Frequency, SCL	f_SCL	—	100	—	400	—	1000	kHz
Clock Pulse Width Low	t_LOW	4,700	—	1,300	—	500	—	ns
Clock Pulse Width High	t_HIGH	4,000	—	600	—	400	—	ns
Input Filter Spike Suppression (SCL,SDA)⁽²⁾	t_I	—	100	—	100	—	50	ns
Clock Low to Data Out Valid	t_AA	—	4,500	—	900	—	450	ns
Bus Free Time between Stop and Start⁽²⁾	t_BUF	4,700	—	1,300	—	500	—	ns
Start Hold Time	t_HD.STA	4,000	—	600	—	250	—	ns
Start Set-up Time	t_SU.STA	4,700	—	600	—	250	—	ns
Data In Hold Time	t_HD.DAT	0	—	0	—	0	—	ns
Data In Set-up Time	t_SU.DAT	200	—	100	—	100	—	ns
Inputs Rise Time⁽¹⁾	t_R	—	1,000	—	300	—	100	ns
Inputs Fall Time⁽¹⁾	t_F	—	300	—	300	—	100	ns
Stop Condition Set-up Time	t_SU.STO	4,700	—	600	—	250	—	ns
Write-Protect Setup Time	t_SU.WP	4,000	—	600	—	250	—	ns
Write-Protect Hold Time	t_HD.WP	4,000	—	600	—	250	—	ns
Data Out Hold Time	t_DH	100	—	50	—	50	—	ns
Write Cycle Time	t_WR	—	10	—	10	—	10	ms

Note:

AC measurement conditions:
- C_L: 100 pF
- R_PUP (SDA bus line pull-up resistor to V_CC): 1.3 kΩ (1000 kHz), 4 kΩ (400 kHz), 10 kΩ (100 kHz)
- Input pulse voltages: 0.3 x V_CC to 0.7 x V_CC
- Input rise and fall times: ≤50 ns
- Input and output timing reference voltages: 0.5 x V_CC
These parameters are determined through product characterization and are not 100% tested in production.

Figure 4-1. Bus Timing