Datasheet
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Electrical Characteristics
PCA9546A
4-CHANNEL I
2
C AND SMBus SWITCH
WITH RESET FUNCTION
SCPS148E – OCTOBER 2005 – REVISED JANUARY 2008
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS V
CC
MIN TYP
(1)
MAX UNIT
V
POR
Power-on reset voltage
(2)
No load, V
I
= V
CC
or GND V
POR
1.6 2.1 V
5 V 3.6
4.5 V to 5.5 V 2.6 4.5
3.3 V 1.9
V
pass
Switch output voltage V
SWin
= V
CC
, I
SWout
= – 100 µ A V
3 V to 3.6 V 1.6 2.8
2.5 V 1.5
2.3 V to 2.7 V 1.1 2
V
OL
= 0.4 V 3 7
I
OL
SCL, SDA 2.3 V to 5.5 V mA
V
OL
= 0.6 V 6 10
SCL, SDA ± 1
SC3 – SC0, SD3 – SD0 ± 1
I
I
V
I
= V
CC
or GND 2.3 V to 5.5 V µ A
A2 – A0 ± 1
RESET ± 1
5.5 V 3 12
Operating mode f
SCL
= 100 kHz V
I
= V
CC
or GND, I
O
= 0 3.6 V 3 11
2.7 V 3 10
5.5 V 0.3 1
I
CC
Low inputs V
I
= GND, I
O
= 0 3.6 V 0.1 1 µ A
2.7 V 0.1 1
Standby mode
5.5 V 0.3 1
High inputs V
I
= V
CC
, I
O
= 0 3.6 V 0.1 1
2.7 V 0.1 1
SCL or SDA input at 0.6 V,
8 15
Other inputs at V
CC
or GND
Supply-current
Δ I
CC
SCL, SDA µ A
change
SCL or SDA input at V
CC
– 0.6 V,
2.3 V to 5.5 V 8 15
Other inputs at V
CC
or GND
A2 – A0 4.5 6
C
i
V
I
= V
CC
or GND 2.3 V to 5.5 V pF
RESET 4.5 5.5
SCL, SDA 15 19
C
io(OFF)
(3)
V
I
= V
CC
or GND, Switch OFF 2.3 V to 5.5 V pF
SC3 – SC0, SD3 – SD0 6 8
4.5 V to 5.5 V 4 9 16
V
O
= 0.4 V, I
O
= 15 mA
R
ON
Switch on-state resistance 3 V to 3.6 V 5 11 20 Ω
V
O
= 0.4 V, I
O
= 10 mA 2.3 V to 2.7 V 7 16 45
(1) All typical values are at nominal supply voltage (2.5-V, 3.3-V, or 5-V V
CC
), T
A
= 25 ° C.
(2) The power-on reset circuit resets the I
2
C bus logic with V
CC
< V
POR
. V
CC
must be lowered to 0.2 V to reset the device.
(3) C
io(ON)
depends on internal capacitance and external capacitance added to the SCn lines when channels(s) are ON.
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