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| TCA9538 Datasheet, PDF (25/37 Pages) Texas Instruments – Low Voltage 8-Bit I2C and SMBus Low-Power I/O Expander | |||
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Typical Application (continued)
9.2.3 Application Curves
TCA9538
SCPS199C â AUGUST 2014 â REVISED OCTOBER 2015
25
Standard-mode
Fast-mode
20
15
10
5
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 27. 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
VCC > 2V
VCC <= 2
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
VCC (V)
D009
VOL = 0.2*VCC, IOL = 2 mA
when VCC ⤠2 V
VOL = 0.4 V, IOL = 3 mA
when VCC > 2 V
Figure 28. Minimum Pull-Up Resistance (Rp(min)) vs Pull-Up
Reference Voltage (VCC)
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