SCPS121 Data sheet

SCPS121I January 2005 – August 2024 PCF8575

PRODUCTION DATA

5.6 I²C Interface Timing Requirements

over recommended operating free-air temperature range (unless otherwise noted) (see Figure 6-1)

			MIN	MAX	UNIT
f_scl	I²C clock frequency			400	kHz
t_sch	I²C clock high time		0.6		μs
t_scl	I²C clock low time		1.3		μs
t_sp	I²C spike time			50	ns
t_sds	I²C serial data setup time		100		ns
t_sdh	I²C serial data hold time		0		ns
t_icr	I²C input rise time		20 + 0.1C_b ⁽¹⁾	300	ns
t_icf	I²C input fall time		20 + 0.1C_b ⁽¹⁾	300	ns
t_ocf	I²C output fall time	10-pF to 400-pF bus		300	ns
t_buf	I²C bus free time between Stop and Start		1.3		μs
t_sts	I²C start or repeated Start condition setup		0.6		μs
t_sth	I²C start or repeated Start condition hold		0.6		μs
t_sps	I²C Stop condition setup		0.6		μs
t_vd	Valid-data time	SCL low to SDA output valid		1.2	μs
C_b	I²C bus capacitive load			400	pF

(1) C_b = total bus capacitance of one bus line in pF