TCA9555_16 Datasheet, PDF (13/46 Pages) Texas Instruments – Low-Voltage 16-Bit I2C and SMBus I/O Expander with Interrupt Output and Configuration Registers

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TCA9555
SCPS200D – JULY 2009 – REVISED JULY 2016
Parameter Measurement Information (continued)
V_CC
DUT
R_L = 4.7 kΩ
INT
C_L = 100 pF
INTERRUPT LOAD CONFIGURATION
INT
Data
Into
Port
Start
Condition
Slave Address (TCA9555)
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
t_ir
A
t_ir
B
B
A
t_iv
A
Address
Data 1
Data 2
t_sps
Data 3
1P
INT
0.7 × V_CC
0.3 × V_CC
SCL
R/W
A
0.7 × V_CC
0.3 × V_CC
t_iv
Pn
0.7 × V_CC
INT
0.3 × V_CC
t_ir
0.7 × V_CC
0.3 × V_CC
View A−A
View B−B
A. C_L includes probe and jig capacitance.
B. All inputs are supplied by generators having the following characteristics: PRR ≤ 10 MHz, Z_O = 50 Ω, t_r/t_f ≤ 30 ns.
C. All parameters and waveforms are not applicable to all devices.
Figure 20. Interrupt Load Circuit and Voltage Waveforms
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