Datasheet

P0 A
0.7 × V
CC
0.3 × V
CC
SCL
P7
t
pv
(see Note B)
Slave
ACK
Unstable
Data
Last Stable Bit
SDA
Pn
Pn
WRITE MODE (R/W = 0)
P0 A
0.7 × V
CC
0.3 × V
CC
SCL
P7
0.7 × V
CC
0.3 × V
CC
t
ps
t
ph
READ MODE (R/W
= 1)
P-PORT LOAD CONFIGURATION
DUT
C
L
= 50 pF
(see Note A)
Pn
2 × V
CC
500 W
500 W
1.5 V
PCA9557
SCPS133I – DECEMBER 2005 – REVISED JUNE 2008 .................................................................................................................................................... www.ti.com
PARAMETER MEASUREMENT INFORMATION (continued)
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 12. P-Port Load Circuit and Voltage Waveforms
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