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| TCA9546A Datasheet, PDF (18/31 Pages) Texas Instruments – Low Voltage 4-Channel I2C and SMBus Switch with Reset Function | |||
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TCA9546A
SCPS205A â APRIL 2014 â REVISED FEBRUARY 2015
Typical Application (continued)
10.2.3 TCA9546A Application Curves
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5
25
25ºC (Room Temperature)
85ºC
4
-40ºC
20
Standard-mode
Fast-mode
3
15
2
10
1
5
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
VCC (V)
D007
Standard-mode
SPACE
(fSCL kHz, tr
(fSCL kHz, tr)
0
0 50 100 150
Standard-mode
(fSCL= 100 kHz, tr = 1 µs)
200 250 300 350 400 450
Cb (pF)
D008
Fast-mode
(fSCL= 400 kHz, tr= 300 ns)
Figure 16. Pass-Gate Voltage (Vpass) vs Supply Voltage
(VCC) at Three Temperature Points
Figure 17. Maximum Pull-Up resistance (Rp(max)) vs Bus
Capacitance (Cb)
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
VDPUX > 2V
VDPUX <= 2
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
VDPUX (V)
D009
VOL = 0.2*VDPUX, IOL = 2 mA when VDPUX ⤠2 V
VOL = 0.4 V, IOL = 3 mA when VDPUX > 2 V
Figure 18. Minimum Pull-Up Resistance (Rp(min)) vs Pull-Up Reference Voltage (VDPUX)
18
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