TCA9538 Datasheet, PDF (11/37 Pages) Texas Instruments – Low Voltage 8-Bit I2C and SMBus Low-Power I/O Expander

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TCA9538
SCPS199C – AUGUST 2014 – REVISED OCTOBER 2015
Parameter Measurement Information (continued)
V_CC
DUT
R_L = 4.7 kΩ
INT
C_L = 100 pF
(see Note A)
INTERRUPT LOAD CONFIGURATION
Start
Condition
Slave Address
ACK
From Slave
R/W
8 Bits
(One Data Byte)
From Port
ACK
From Slave
Data From Port
S 1 1 1 0 0 A1 A0 1 A
Data 1
A
Data 2
1P
1234 5678A
t_ir
INT
A
t_ir
B
B
Data
Into
Port
A
t_iv
A
Address
Data 1
t_sps
Data 2
INT
0.7 × V_CC
0.3 × V_CC
SCL
R/W
A
0.7 × V_CC
0.3 × V_CC
t_iv
P_n
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 10. Interrupt Load Circuit and Voltage Waveforms
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