SCPS279 Data sheet

SCPS279 February 2022 TCA9537

PRODUCTION DATA

6.7 I²C Bus Timing Requirements

over operating free-air temperature range (unless otherwise noted)

			MIN	MAX	UNIT
I²C Bus - Standard Mode
f_scl	I²C clock frequency		0	100	kHz
t_sch	I²C clock high time		4		µs
t_scl	I²C clock low time		4.7		µs
t_sp	I²C spike time			50	ns
t_sds	I²C serial-data setup time		250		ns
t_sdh	I²C serial-data hold time		0		ns
t_icr	I²C input rise time			1000	ns
t_icf	I²C input fall time			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		4.7		µs
t_sts	I²C start or repeated start condition setup		4.7		µs
t_sth	I²C start or repeated start condition hold		4		µs
t_sps	I²C stop condition setup		4		µs
t_vd(data)	Valid data time	SCL low to SDA output valid		3.45	µs
t_vd(ack)	Valid data time of ACK condition	ACK signal from SCL low to SDA (out) low		3.45	µs
C_b	I²C bus capactive load			400	pF
I²C Bus - Fast Mode
f_scl	I²C clock frequency		0	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	300	ns
t_icf	I²C input fall time		20 × (V_CC / 5.5 V)	300	ns
t_ocf	I²C output fall time	10-pF to 400-pF bus	20 × (V_CC / 5.5 V)	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(data)	Valid data time	SCL low to SDA output valid		0.9	µs
t_vd(ack)	Valid data time of ACK condition	ACK signal from SCL low to SDA (out) low		0.9	µs
C_b	I²C bus capactive load			400	pF
I²C Bus - Fast Mode Plus
f_scl	I²C clock frequency		0	1000	kHz
t_sch	I²C clock high time		0.26		µs
t_scl	I²C clock low time		0.5		µs
t_sp	I²C spike time			50	ns
t_sds	I²C serial-data setup time		50		ns
t_sdh	I²C serial-data hold time		0		ns
t_icr	I²C input rise time			120	ns
t_icf	I²C input fall time		20 × (V_CC / 5.5 V)	120	ns
t_ocf	I²C output fall time	10-pF to 550-pF bus	20 × (V_CC / 5.5 V)	120	ns
t_buf	I²C bus free time between stop and start		0.5		µs
t_sts	I²C start or repeated start condition setup		0.26		µs
t_sth	I²C start or repeated start condition hold		0.26		µs
t_sps	I²C stop condition setup		0.26		µs
t_vd(data)	Valid data time	SCL low to SDA output valid		0.45	µs
t_vd(ack)	Valid data time of ACK condition	ACK signal from SCL low to SDA (out) low		0.45	µs
C_b	I²C bus capactive load			550	pF

6.7 I2C Bus Timing Requirements

6.7 I²C Bus Timing Requirements