TCA8418 Datasheet, PDF (31/37 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
SDA
DUT
R_L = 1 kW
C_L = 50 pF
(see Note A)
DUT
Pn
C_L = 50 pF
(see Note A)
500 W
500 W
2 ´ V_CCP
SDA LOAD CONFIGURATION
P-PORT LOAD CONFIGURATION
SCL
Start
ACK or Read Cycle
SDA
RESET
t_REC
t_RESET
t_W
V_CCP/2
t_REC
0.3 ´ V_CCI
Pn
V_CCP/2
t_RESET
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. The outputs are measured one at a time, with one transition per measurement.
D. I/Os are configured as inputs.
E. All parameters and waveforms are not applicable to all devices.
Figure 16. Reset Load Circuits and Voltage Waveforms
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