TCA9555_16 Datasheet, PDF (14/46 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
Parameter Measurement Information (continued)
DUT
Pn
C_L = 100 pF
GND
P-PORT LOAD CONFIGURATION
SCL
SDA
Pn
P00
A
0.7 × V_CC
P17
0.3 × V_CC
Slave
ACK
t_pv
(see Note A)
Unstable
Data
Last Stable Bit
WRITE MODE (R/W = 0)
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SCL
P00
A
t_ps
Pn
P17
t_ph
0.7 × V_CC
0.3 × V_CC
0.7 × V_CC
0.3 × V_CC
READ MODE (R/W = 1)
A. C_L includes probe and jig capacitance.
B. t_pv is measured from 0.7 × V_CC on SCL to 50% I/O (Pn) output.
C. All inputs are supplied by generators having the following characteristics: PRR ≤ 10 MHz, Z_O = 50 Ω, t_r/t_f ≤ 30 ns.
D. The outputs are measured one at a time, with one transition per measurement.
E. All parameters and waveforms are not applicable to all devices.
Figure 21. P-Port Load Circuit and Voltage Waveforms
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