TCA9546A Datasheet, PDF (5/31 Pages) Texas Instruments – Low Voltage 4-Channel I2C and SMBus Switch with Reset Function

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TCA9546A
SCPS205A – APRIL 2014 – REVISED FEBRUARY 2015
7.5 Electrical Characteristics⁽¹⁾
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
V_CC
V_PORR
Power-on reset voltage, V_CC
rising
No load,
V_I = V_CC or
GND ⁽³⁾
V_PORF
Power-on reset voltage, V_CC
falling ⁽⁴⁾
No load,
V_I = V_CC or
GND ⁽³⁾
5V
4.5 V to 5.5 V
3.3 V
V_pass
Switch output voltage
V_SWin = V_CC,
I_SWout = –100 μA
3 V to 3.6 V
2.5 V
2.3 V to 2.7 V
1.8 V
1.65 V to 1.95 V
I_OL
SDA
SCL, SDA
V_OL = 0.4 V
V_OL = 0.6 V
1.65 V to 5.5 V
SC3–SC0, SD3–SD0
I_I
A2–A0
V_I = V_CC or GND⁽³⁾
1.65 V to 5.5 V
RESET
f_SCL = 400 kHz
V_I = V_CC or GND⁽³⁾
I_O = 0
t_r,max = 300 ns
Operating mode
f_SCL = 100 kHz
V_I = V_CC or GND⁽³⁾
I_O = 0
t_r,max = 1 µs
I_CC
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
Low inputs
V_I = GND⁽³⁾
I_O = 0
3.6 V
2.7 V
Standby mode
1.65 V
5.5 V
High inputs
V_I = V_CC
I_O = 0
3.6 V
2.7 V
1.65 V
ΔI_CC
C_i
Supply-current
change
SCL, SDA
A2–A0
RESET
SCL or SDA input at 0.6 V,
Other inputs at V_CC or GND⁽³⁾
SCL or SDA input at V_CC – 0.6 V,
Other inputs at V_CC or GND⁽³⁾
V_I = V_CC or GND⁽³⁾
1.65 V to 5.5 V
1.65 V to 5.5 V
1.65 V to 5.5 V
C_io(OFF)
(5)
SCL, SDA
SC3–SC0, SD3–SD0
V_I = V_CC or GND⁽³⁾ Switch OFF
1.65 V to 5.5 V
MIN TYP⁽²⁾ MAX UNIT
1.2 1.5 V
0.8
1
3.6
2.6
4.5
1.9
1.6
2.8
V
1.4
1.0
1.8
0.8
0.5
1.1
3
7
mA
6
10
±1
±1
μA
±1
±1
50
20
11
6
35
14
5
2
μA
1.6
2
1.0 1.3
0.7 1.1
0.4 0.55
1.6
2
1.0 1.3
0.7 1.1
0.4 0.55
2
15
μA
2
15
4.5
6
pF
4.5 5.5
15
19
pF
6
8
(1) For operation between specified voltage ranges, refer to the worst-case parameter in both applicable ranges.
(2) All typical values are at nominal supply voltage (1.8-V, 2.5-V, 3.3-V, or 5-V V_CC), T_A = 25°C.
(3) RESET = V_CC (held high) when all other input voltages, V_I = GND.
(4) The power-on reset circuit resets the I²C bus logic with V_CC < V_PORF.
(5) C_io(ON) depends on internal capacitance and external capacitance added to the SCn lines when channels(s) are ON.
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