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PCF8574ADWR Datasheet(PDF) 7 Page - Texas Instruments

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Part # PCF8574ADWR
Description  REMOTE 8BIT I/O EXPANDER FOR I2C BUS
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

PCF8574ADWR Datasheet(HTML) 7 Page - Texas Instruments

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PCF8574
REMOTE 8BIT I/O EXPANDER FOR I2C BUS
SCPS068C - JULY 2001 − REVISED JANUARY 2004
7
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
DUT
RL = 1 kΩ
VCC
CL = 10 pF to 400 pF
tbuf
ticr
tsth
tsds
tsdh
ticf
ticr
tscl
tsch
tsts
tPHL
tPLH
0.7
× VCC
Stop
Condition
tsps
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
ticf
Stop
Condition
(P)
tsp
0.7
× VCC
0.3
× VCC
0.3
× VCC
Pn
BYTE
DESCRIPTION
1
I2C address
2
P-port data
Figure 1. I2C Interface Load Circuit and Voltage Waveforms


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