TCA9803 datasheet(9/38 Pages) TI2

9 / 38 page

VCCB

SDAA

SCLA

UVLOB

(Max)

tstartup

1) VCCA is powered, SDAB/SCLB are connected to GND

0.9 VCCA

SDAB

SCLB

0.7 VCCB

0.5 VCCA

1) VCCA is powered, SDAA/SCLA are connected to GND

0.3 VCCB

B Side

0.7 VCCB

0.3 VCCB

tf:B

tPLH:AB

tPHL:BA

tf:A

tPLH:BA

tr:A

tr:B

0.7 VCCA

0.3 VCCA

A Side

0.3 VCCA

0.7 VCCA

0.3 VCCB

0.7 VCCB

External

pull-down

(B-side)

VOL

(1)

VOL

(2)

VOL

(3)

1) The VOL of only the external device, pulling down on the bus

2) The VOL of both the external device and the TCA980x translator

3) The VOL of only the TCA980x, after the external device releases

Off

A Side

0.7 VCCA

0.3 VCCA

tf:B

tPLH:AB

tPHL:AB

tf:A

tr:A

tr:B

0.7 VCCB

0.3 VCCB

B Side

0.3 VCCA

0.7 VCCA

0.3 VCCB

0.7 VCCB

External

pull-down

(A-side)

Off

TCA9803

www.ti.com

SCPS267B – MARCH 2017 – REVISED FEBRUARY 2020

Product Folder Links: TCA9803

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8 Parameter Measurement Information

Figure 9. Propagation Delay and Transition Times

for A-Side to B-Side

Figure 10. Propagation Delay for B-Side to A-Side

Figure 11. Startup Time (tstartup)

Figure 12. Enable and Disable Time (ten and tdis)

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