TCA6408A-Q1 Datasheet, PDF (7/40 Pages) Texas Instruments – Low-Voltage 8-Bit I2C and SMBus I/O Expander With Interrupt Output

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TCA6408A-Q1
SCPS234 – SEPTEMBER 2016
I²C Interface Timing Requirements (continued)
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 17)
MIN
t_vd(data)
Valid data time, SCL low to SDA output valid
t_vd(ack)
Valid data time of ACK condition, ACK signal from SCL low to SDA (out) low
I²C BUS—FAST MODE
f_scl
I²C clock frequency
t_sch
I²C clock high time
t_scl
I²C clock low time
t_sp
I²C spike time
t_sds
I²C serial data setup time
t_sdh
I²C serial data hold time
t_icr
I²C input rise time
t_icf
I²C input fall time
0
0.6
1.3
0
100
0
20
20 x (Vcc/
5.5 V)
t_ocf
t_buf
t_sts
t_sth
t_sps
t_vd(data)
t_vd(ack)
I²C output fall time, 10-pF to 400-pF bus
I²C bus free time between Stop and Start
I²C Start or repeater Start condition setup time
I²C Start or repeater Start condition hold time
I²C Stop condition setup time
Valid data time, SCL low to SDA output valid
Valid data time of ACK condition, ACK signal from SCL low to SDA (out) low
20 x (Vcc/
5.5 V)
1.3
0.6
0.6
0.6
MAX
1
1
400
50
300
300
300
1
1
UNIT
μs
μs
kHz
μs
μs
ns
ns
ns
ns
ns
ns
μs
μs
μs
μs
μs
μs
6.7 Reset Timing Requirements
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 20)
MIN
I²C BUS—STANDARD and FAST MODE
t_W
Reset pulse duration
40
t_REC
Reset recovery time
0
t_RESET
Time to reset
600
MAX
UNIT
ns
ns
ns
6.8 Switching Characteristics
over recommended operating free-air temperature range, C_L ≤ 100 pF (unless otherwise noted) (see Figure 17)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
MIN
MAX
I²C BUS—STANDARD and FAST MODE
t_iv
Interrupt valid time
t_ir
Interrupt reset delay time
t_pv
Output data valid
t_ps
Input data setup time
t_ph
Input data hold time
P-Port
SCL
SCL
P-Port
P-Port
INT
INT
P7–P0
SCL
SCL
4
4
400
0
300
UNIT
μs
μs
ns
ns
ns
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