Datasheet

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PARAMETER MEASUREMENT INFORMATION
R
L
= 1 kΩ
V
CC
C
L
= 10 pF to = 400 pF
t
buf
t
icr
t
sth
t
sds
t
sdh
t
icf
t
icr
t
scl
t
sch
t
sts
t
PHL
t
PLH
0.3 × V
CC
Stop
Condition
t
sps
Repeat
Start
Condition
Start or
Repeat
Start
Condition
SCL
SDA
Start
Condition
(S)
Bit 7
(MSB)
Bit 6
Bit 0
LSB
(R/W)
Acknowledge
(A)
Stop
Condition
(P)
2 Bytes for Complete Device
Programming
LOAD CIRCUIT
VOLTAGE WAVEFORMS
t
icf
Stop
Condition
(P)
t
sp
DUT
P
n
0.7 × V
CC
0.3 × V
CC
0.7 × V
CC
PCF8574A
REMOTE 8-BIT I/O EXPANDER FOR I
2
C BUS
SCPS069D – JULY 2001 – REVISED OCTOBER 2005
Figure 1. I
2
C Interface Load Circuit and Voltage Waveforms
7