PCA9555
REMOTE 16-BIT I2C AND SMBus I/O EXPANDER
WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS
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SCPS131D–AUGUST 2005–REVISED OCTOBER 2006
PARAMETER MEASUREMENT INFORMATION (continued)
Pn
DUT
C
L
= 100 pF
GND
P-PORT LOAD CONFIGURATION
0.7 × V
0.3 × V
CC
SCL
P00
A
P17
CC
Slave
ACK
SDA
Pn
t
pv
(see Note A)
Last Stable Bit
Unstable
Data
WRITE MODE (R/W = 0)
0.7 × V
0.3 × V
CC
SCL
Pn
P00
A
P17
CC
t
ps
t
ph
0.7 × V
0.3 × V
CC
CC
READ MODE (R/W = 1)
A. CL includes probe and jig capacitance.
B. tpv is measured from 0.7 × VCC on SCL to 50% I/O (Pn) output.
C. All inputs are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr/tf ≤ 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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