TCA9555 Datasheet, PDF (20/32 Pages) Texas Instruments – LOW VOLTAGE 16-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS

TCA9555
SCPS200A – JULY 2009 – REVISED JULY 2009 .............................................................................................................................................................. www.ti.com
PARAMETER MEASUREMENT INFORMATION (continued)
DUT
Pn
C_L = 100 pF
GND
P-PORT LOAD CONFIGURATION
SCL
P00
SDA
Pn
A
P17
Slave
ACK
ÎÎÎ _tpv
ÎÎÎÎÎÎÎÎÎ ^{(see Note A)}
Unstable
Last Stable Bit
Data
0.7 × V_CC
0.3 × V_CC
WRITE MODE (R/W = 0)
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 13. P-Port Load Circuit and Voltage Waveforms
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