PCF8575DWRG4 Datasheet, PDF (14/32 Pages) Texas Instruments – REMOTE 16-BIT I2C AND SMBus I/O EXPANDERWITH INTERRUPT OUTPUT

PCF8575
REMOTE 16-BIT I²C AND SMBus I/O EXPANDER
WITH INTERRUPT OUTPUT
SCPS121D – JANUARY 2005 – REVISED APRIL 2007
PARAMETER MEASUREMENT INFORMATION (continued)
V_CC
DUT
R_L = 4.7 kΩ
INT
C_L = 100 pF
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INTERRUPT LOAD CONFIGURATION
INT
Data
Into
Port
Start
Condition
Slave Address (PCF8575)
ACK
From Slave
R/W
16 Bits
(2 Data Bytes)
From Port
ACK
From Slave
Data From Port
S 0 1 0 0 A₂ A₁ A₀ 1 A Data 1
Data 2 A
Data 3
1234 5678A
t_ir
A
t_ir
B
B
t_iv
A
A
Address
Data 1
Data 2
t_sps
Data 3
1P
0.7 × V_CC
INT
0.3 × V_CC
SCL
R/W
A
t_iv
t_ir
P_n
0.7 × V_CC
INT
0.3 × V_CC
View A−A
View B−B
Figure 7. Interrupt Load Circuit and Voltage Waveforms
0.7 × V_CC
0.3 × V_CC
0.7 × V_CC
0.3 × V_CC
14
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