TCA9554A Datasheet, PDF (22/33 Pages) Texas Instruments – LOW VOLTAGE 8-BIT I2C AND SMBus I/O EXPANDER

TCA9554A
SCPS196 – DECEMBER 2010
PARAMETER MEASUREMENT INFORMATION (continued)
DUT
Pn
C_L = 50 pF
(see Note A)
500 W
500 W
2 × V_CC
P-PORT LOAD CONFIGURATION
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SCL
P0
SDA
P_n
A
P7
Slave
ACK
ÎÎÎ _tpv
ÎÎÎÎÎÎÎÎÎ^{(see Note B)}
Unstable
Last Stable Bit
Data
0.7 × V_CC
0.3 × V_CC
WRITE MODE (R/W = 0)
SCL
P0
A
P7
t_ps
t_ph
P_n
0.7 × V_CC
0.3 × V_CC
0.7 × V_CC
1.5 V
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 pin 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 12. P-Port Load Circuit and Voltage Waveforms
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