TCA9539_15 Datasheet, PDF (7/42 Pages) Texas Instruments – Low Voltage 16-Bit I2C and SMBus Low-Power I/O Expander

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TCA9539
SCPS202B – OCTOBER 2009 – REVISED OCTOBER 2015
6.6 I²C Interface Timing Requirements
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 18)
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
STANDARD MODE
I²C BUS
MIN
MAX
0
100
4
4.7
50
250
0
1000
300
FAST MODE
I²C BUS
MIN
0
0.6
1.3
100
0
20
20 × (V_DD / 5.5
V)
MAX
400
50
300
300
UNIT
kHz
µs
µs
ns
ns
ns
ns
ns
t_ocf
I²C output fall time
10-pF to 400-pF bus
t_buf
I²C bus free time between Stop and Start
t_sts
I²C Start or repeated Start condition setup
t_sth
I²C Start or repeated Start condition hold
t_sps
I²C Stop condition setup
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
C_b
I²C bus capacitive load
300
20 × (V_DD / 5.5
V)
4.7
1.3
4.7
0.6
4
0.6
4
0.6
3.45
3.45
400
300 ns
µs
µs
µs
µs
0.9 µs
0.9 µs
400 pF
6.7 RESET Timing Requirements
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 21)
MIN
t_W
Reset pulse duration
6
t_REC
Reset recovery time
0
t_RESET
Time to reset; For V_CC = 2.3 - 5.5 V
Time to reset; For V_CC = 1.65 - 2.3 V
400
550
MAX
UNIT
ns
ns
ns
ns
6.8 Switching Characteristics
over recommended operating free-air temperature range, C_L ≤ 100 pF (unless otherwise noted) (see Figure 19 and Figure 20)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
MIN
MAX UNIT
t_iv
Interrupt valid time
t_ir
Interrupt reset delay time
t_pv
Output data valid; For V_CC = 2.3 - 5.5 V
Output data valid; For V_CC = 1.65 - 2.3 V
t_ps
Input data setup time
t_ph
Input data hold time
P port
SCL
SCL
P port
P port
INT
INT
P port
SCL
SCL
4 μs
4 μs
200 ns
300 ns
150
ns
1
μs
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