TCA9538 Datasheet, PDF (6/37 Pages) Texas Instruments – Low Voltage 8-Bit I2C and SMBus Low-Power I/O Expander

TCA9538
SCPS199C – AUGUST 2014 – REVISED OCTOBER 2015
Electrical Characteristics (continued)
over operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
V_I = V_CC or GND, I_O = 0,
I/O = inputs, f_scl = 400 kHz, No load
t_r = 3 ns
Operating mode
V_I = V_CC or GND, I_O = 0,
I/O = inputs, f_scl = 400 kHz, No load
t_r,max = 300 ns
I_CC
V_I = V_CC or GND, I_O = 0,
I/O = inputs, f_scl = 100 kHz, No load
t_r,max = 1 µs
Standby mode
ΔI_CC
C_i
C_io
Additional current in standby
mode
SCL
SDA
P port
V_I = V_CC or GND, I_O = 0,
I/O = inputs, f_scl = 0 kHz, No load
One P-port input at V_CC – 0.6 V,
Other P-port inputs at V_CC or GND
V_I = V_CC or GND
V_IO = V_CC or GND
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V_CC
5.5 V
5.5 V
3.6 V
2.7 V
1.65 V
5.5 V
3.6 V
2.7 V
1.65 V
5.5 V
3.6 V
2.7 V
1.65 V
1.65 V to 5.5 V
1.65 V to 5.5 V
1.65 V to 5.5 V
MIN TYP⁽¹⁾ MAX UNIT
18
30
34
15
9
μA
5
20
8
5
3
1.9 3.5
1.1 1.8
μA
1.0 1.6
0.4 1.0
70 µA
4
5 pF
5.5 6.5
pF
8 9.5
6.6 I²C Interface Timing Requirements
over operating free-air temperature range (unless otherwise noted) (see Figure 9)
STANDARD MODE
I²C BUS
f_scl
t_sch
t_scl
t_sp
t_sds
t_sdh
t_icr
t_icf
t_ocf
t_buf
t_sts
t_sth
t_sps
t_vd(data)
t_vd(ack)
C_b
I²C clock frequency
I²C clock high time
I²C clock low time
I²C spike time
I²C serial-data setup time
I²C serial-data hold time
I²C input rise time
I²C input fall time
I²C output fall time
10-pF to 400-pF bus
I²C bus free time between Stop and Start
I²C Start or repeated Start condition setup
I²C Start or repeated Start condition hold
I²C Stop condition setup
Valid data time
SCL low to SDA output valid
Valid data time of ACK condition
ACK signal from SCL low to
SDA (out) low
I²C bus capacitive load
MIN
MAX
0
100
4
4.7
50
250
0
1000
300
300
4.7
4.7
4
4
3.45
3.45
400
FAST MODE
I²C BUS
MIN
0
0.6
1.3
100
0
20
20 × (V_DD / 5.5 V)
20 × (V_DD / 5.5 V)
1.3
0.6
0.6
0.6
MAX
400
50
300
300
300
0.9
UNIT
kHz
μs
μs
ns
ns
ns
ns
ns
ns
μs
μs
μs
μs
μs
0.9 μs
400 ns
6
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