TCA9555 Datasheet, PDF (21/32 Pages) Texas Instruments – LOW VOLTAGE 16-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS

TCA9555
www.ti.com .............................................................................................................................................................. SCPS200A – JULY 2009 – REVISED JULY 2009
PARAMETER MEASUREMENT INFORMATION (continued)
V_CC
DUT
R_L = 1 kΩ
SDA
C_L = 50 pF
DUT
Pn
C_L = 100 pF
SDA LOAD CONFIGURATION
P-PORT LOAD CONFIGURATION
SCL
Start
ACK or Read Cycle
SDA
RESET
t_REC
t_REC
t_w
0.3 y V_CC
V_CC/2
Pn
V_CC/2
t_RESET
A. C_L includes probe and jig capacitance.
B. All inputs are supplied by generators having the following characteristics: PRR ≤ 10 MHz, Z_O = 50 Ω, t_r/t_f ≤ 30 ns.
C. The outputs are measured one at a time, with one transition per measurement.
D. I/Os are configured as inputs.
E. All parameters and waveforms are not applicable to all devices.
Figure 14. Reset Load Circuits and Voltage Waveforms
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