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TCA9554 Datasheet(PDF) 12 Page - Texas Instruments

Part # TCA9554
Description  TCA9554 Low Voltage 8-Bit I2C and SMBus Low-Power I/O Expander With Interrupt Output and Configuration Registers
PDF  48 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

TCA9554 Datasheet(HTML) 12 Page - Texas Instruments

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INT
R/W
A
tir
0.7 × VCC
0.3 × VCC
0.7 × VCC
0.3 × VCC
0.7 × VCC
0.3 × VCC
0.7 × VCC
0.3 × VCC
INT
SCL
tiv
Interupt Load Configuration
RL = 4.7 k
VCC
CL = 100 pF
(see Note A)
DUT
INT
SCL
SDA
INT
Start
Condition
R/W
Read From
Port
Data Into
Port
Stop
Condition
ACK From
Master
NACK From
Master
ACK From
Slave
Data From Port
Slave Address
Data From Port
8
7
6
5
4
3
2
1
A
Data 1
Data 4
A
NA P
Data 2
Data 3
Data 4
tiv
tph
tps
tir
Data 5
S
0
1
0
0 A2 A1 A0
1
Data Into
Port (
)
P
n
Data 1
12
TCA9554
SCPS233E – MARCH 2012 – REVISED FEBRUARY 2017
www.ti.com
Product Folder Links: TCA9554
Submit Documentation Feedback
Copyright © 2012–2017, Texas Instruments Incorporated
Parameter Measurement Information (continued)
A.
CL includes probe and jig capacitance.
B.
All inputs are supplied by generators having the following characteristics: PRR
≤ 10 MHz, ZO = 50 Ω, tr/tf ≤ 30 ns.
C.
All parameters and waveforms are not applicable to all devices.
Figure 12. Interrupt Load Circuit and Voltage Waveforms



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