TCA8418 Datasheet, PDF (29/37 Pages) Texas Instruments – I2C CONTROLLED KEYPAD SCAN IC WITH INTEGRATED ESD PROTECTION

TCA8418
www.ti.com ......................................................................................................................................................................................... SCPS215 – SEPTEMBER 2009
PARAMETER MEASUREMENT INFORMATION (continued)
V_CCI
INT
DUT
R_L = 4.7 kW
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
0
1
000
0
AD
DR
1
A
Data 1
A
Data 2
1P
INT
Data
Into
Port
12 34 567 8A
t_ir
t_iv
A
A
Address
Data 1
A
t_ir
B
B
t_sps
Data 2
INT
t_iv
Pn
0.5 ´ V_CCI
SCL
R/W
0.5 ´ V_CCP
INT
A
t_ir
0.7 ´ V_CCI
0.3 ´ V_CCI
0.5 ´ V_CCI
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 14. Interrupt Load Circuit and Voltage Waveforms
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