TCA9800 Datasheet, PDF (9/36 Pages) Texas Instruments – Level-Translating I2C Bus Buffer/Repeater

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8 Parameter Measurement Information
TCA9800
SCPS264 – MARCH 2017
External
pull-down _Off
On
Off
(A-side)
A Side
t_f:B
0.7 V_CCA
t_r:A
0.7 V_CCA
0.3 V_CCA
0.3 V_CCA
External
pull-down _Off
On
(B-side)
B Side
t_f:B
0.7 V_CCB
0.3 V_CCB
VOL(1)
VOL(2)
Off
t_r:B
t_PLH:AB
0.7 V_CCB
VOL(3)
0.3 V_CCB
B Side
t_PHL:AB
t_f:A
0.7 V_CCB
0.3 V_CCB
t_PLH:AB
t_r:B
A Side
0.7 V_CCB
0.3 V_CCB
t_PHL:BA
t_f:A
0.7 V_CCA
0.3 V_CCA
t_PLH:BA
t_r:A
0.7 V_CCA
0.3 V_CCA
Figure 9. Propagation Delay and Transition Times
for A-Side to B-Side
1) The V_OL of only the external device, pulling down on the bus
2) The V_OL of both the external device and the TCA980x translator
3) The V_OL of only the TCA980x, after the external device releases
Figure 10. Propagation Delay for B-Side to A-Side
V_CCB
UVLOB
(Max)
tstartup
SDAB
SCLB
0.7 VCCB
0.3 VCCB
SDAA
SCLA
0.9 VCCA
EN
0.5 VCCA
0.5 VCCA
1) V_CCA is powered, SDAA/SCLA are connected to GND
1) V_CCA is powered, SDAB/SCLB are connected to GND
Figure 11. Startup Time (t_startup)
Figure 12. Enable and Disable Time (t_en, and t_dis)
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