TCA9555_16 Datasheet, PDF (28/46 Pages) Texas Instruments – Low-Voltage 16-Bit I2C and SMBus I/O Expander with Interrupt Output and Configuration Registers

TCA9555
SCPS200D – JULY 2009 – REVISED JULY 2016
10.2.3 Application Curves
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Standard-Mode
Fast-Mode
20
15
10
5
0
0 50 100 150 200 250 300 350 400 450
Bus Capacitance (pF)
D008
Standard-mode: f_SCL = 100 kHz, t_r = 1 µs
Fast-mode: f_SCL = 400 kHz, t_r = 300 ns
Figure 37. Maximum Pull-Up Resistance (R_p(max)) vs Bus
Capacitance (C_b)
1.8
V_DPUX > 2 V
1.6
V_DUPX </= 2
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
Pull-Up Reference Voltage (V)
D009
V_OL = 0.2 × V_CC, I_OL = 2 mA when V_CC ≤ 2 V
V_OL = 0.4 V, I_OL = 3 mA when V_CC > 2 V
Figure 38. Minimum Pull-Up Resistance (R_p(min)) vs Pull-up
Reference Voltage (V_CC)
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