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TCA9555 Datasheet, PDF (19/32 Pages) Texas Instruments – LOW VOLTAGE 16-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS | |||
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TCA9555
www.ti.com .............................................................................................................................................................. SCPS200A â JULY 2009 â REVISED JULY 2009
PARAMETER MEASUREMENT INFORMATION (continued)
VCC
DUT
RL = 4.7 kâ¦
INT
CL = 100 pF
INTERRUPT LOAD CONFIGURATION
INT
Data
Into
Port
Start
Condition
Slave Address (PCA9555)
ACK
From Slave
R/W
16 Bits
(Two 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
tir
A
tir
B
B
tiv
A
A
Address
Data 1
Data 2
tsps
Data 3
1P
INT
0.7 Ã VCC
0.3 Ã VCC
SCL
R/W
A
0.7 Ã VCC
0.3 Ã VCC
tiv
Pn
0.7 Ã VCC
INT
0.3 Ã VCC
tir
0.7 Ã VCC
0.3 Ã VCC
View AâA
View BâB
A. CL includes probe and jig capacitance.
B. All inputs are supplied by generators having the following characteristics: PRR ⤠10 MHz, ZO = 50 â¦, tr/tf ⤠30 ns.
C. All parameters and waveforms are not applicable to all devices.
Figure 12. Interrupt Load Circuit and Voltage Waveforms
Copyright © 2009, Texas Instruments Incorporated
Product Folder Link(s): TCA9555
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