ADuM1253

Ultra-Low-Power, I2C Isolator with

Unidirectional SCL, Extended VDD,

Idle-Bus Hot-Swap, and Low VOL

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Analog Devices | 5

Dynamic Characteristics

(VDD1 - VGND1 = 1.71V to 5.5V, VDD2 - VGND2 = 1.71V to 5.5V, CL = 20pF, TA = -40°C to +125°C, unless otherwise noted. (Note 5)

Typical values are at VDD1 - VGND1 = 3.3V, VDD2 - VGND2 = 3.3V, TA = +25°C, unless otherwise noted. )

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Common-Mode

Transient Immunity

CMTI

(Note 6)

200

kV/µs

Maximum Data Rate

DRMAX

2

MHz

Fall Time

tF1

SDA1 = 0.7 x VDD1

to 0.3 x VDD1

4.5V ≤ VDD1 ≤

5.5V, CL1 = 40pF,

R1 = 1.6kΩ

8.8

20.3

36.1

ns

3.0V ≤ VDD1 ≤

3.6V, CL1 = 40pF,

R1 = 1kΩ

6.1

13.7

24.1

2.25V ≤ VDD1 ≤

2.75V, CL1 = 40pF,

R1 = 810Ω

4.6

10.4

18.5

SDA1 = 0.7 x VDD1

to 0.75V

1.71V ≤ VDD1 ≤

1.89V, CL1 = 40pF,

R1 = 470Ω

2.4

4.7

11.5

SDA1 = 0.9 x VDD1

to 0.9V

4.5V ≤ VDD1 ≤

5.5V, CL1 = 40pF,

R1 = 1.6kΩ

15.4

34.7

64.7

3.0V ≤ VDD1 ≤

3.6V, CL1 = 40pF,

R1 = 1kΩ

9.1

19.7

35.9

2.25V ≤ VDD1 ≤

2.75V, CL1 = 40pF,

R1 = 810Ω

6.0

12.2

23.3

1.71V ≤ VDD1 ≤

1.89V, CL1 = 40pF,

R1 = 470Ω

3.8

6.5

11.1

tF2

SDA2/SCL2 = 0.7 x

VDD2 to 0.3 x VDD2

4.5V ≤ VDD2 ≤

5.5V, CL2 = 400pF,

R2 = 180Ω

11.8

18.6

30.0

3.0V ≤ VDD2 ≤

3.6V, CL2 = 400pF,

R2 = 120Ω

9.0

13.8

21.0

2.25V ≤ VDD2 ≤

2.75V, CL2 =

400pF, R2 = 91Ω

7.6

11.6

17.0

1.71V ≤ VDD2 ≤

1.89V, CL2 =

400pF, R2 = 81Ω

6.5

9.5

13.4

SDA2/SCL2 = 0.9 x

VDD2 to 0.4V

4.5V ≤ VDD2 ≤

5.5V, CL2 = 400pF,

R2 = 180Ω

25.7

41.0

63.0

3.0V ≤ VDD2 ≤

3.6V, CL2 = 400pF,

R2 = 120Ω

19.0

29.0

44.4

2.25V ≤ VDD2 ≤

2.75V, CL2 =

400pF, R2 = 91Ω

15.5

24.0

36.3