ADuM1253

Ultra-Low-Power, I2C Isolator with

Unidirectional SCL, Extended VDD,

Idle-Bus Hot-Swap, and Low VOL

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(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

1.71V ≤ VDD2 ≤

1.89V, CL2 =

400pF, R2 = 81Ω

12.4

18.0

26.1

Propagation Delay

tPLH12

SDA1/SCL1 =

0.66V to

SDA2/SCL2 = 0.7 x

VDD2

4.5V ≤ VDD_ ≤

5.5V, CL1 = 20pF,

R1 = 1.6kΩ, CL2 =

20pF, R2 = 180Ω

37.6

50.0

ns

3.0V ≤ VDD_ ≤

3.6V, CL1 = 20pF,

R1 = 1kΩ, CL2 =

20pF, R2 = 120Ω

35.9

48.0

2.25V ≤ VDD_ ≤

2.75V, CL1 = 20pF,

R1 = 810Ω, CL2 =

20pF, R2 = 91Ω

35.2

47.0

1.71V ≤ VDD_ ≤

1.89V, CL1 = 20pF,

R1 = 470Ω, CL2 =

20pF, R2 = 81Ω

36.5

51.6

tPHL12

SDA1/SCL1 =

0.425V to

SDA2/SCL2 = 0.3 x

VDD2

4.5V ≤ VDD_ ≤

5.5V, CL1 = 20pF,

R1 = 1.6kΩ, CL2 =

20pF, R2 = 180Ω

93.7

133.3

3.0V ≤ VDD1_ ≤

3.6V, CL1 = 20pF,

R1 = 1kΩ, CL2 =

20pF, R2 = 120Ω

84.2

116.4

2.25V ≤ VDD_ ≤

2.75V, CL1 =10pF,

R1 = 810Ω, CL2 =

20pF, R2 = 91Ω

78.8

107.3

1.71V ≤ VDD_ ≤

1.89V, CL1 = 20pF,

R1 = 470Ω, CL2 =

20pF, R2 = 81Ω

75.6

100.1

tPLH21

SDA2 = 0.5 x VDD2

to SDA1 = 0.7 x

VDD1

4.5V ≤ VDD_ ≤

5.5V, CL1 = 20pF,

R1 = 1.6kΩ, CL2 =

20pF, R2 = 180Ω

86.7

95.8

3.0V ≤ VDD_ ≤

3.6V, CL1 = 20pF,

R1 = 1kΩ, CL2 =

20pF, R2 = 120Ω

67.3

76.3

2.25V ≤ VDD_ ≤

2.75V, CL1 = 20pF,

R1 = 810Ω, CL2 =

20pF, R2 = 91Ω

61.0

70.1

1.71V ≤ VDD_ ≤

1.89V, CL1 = 20pF,

41.3

53.0