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

R1 = 470Ω, CL2 =

20pF, R2 = 81Ω

tPHL21

SDA2 = 0.3 x VDD2

to SDA1 = 0.3 x

VDD1

4.5V ≤ VDD_ ≤

5.5V, CL1 = 20pF,

R1 = 1.6kΩ, CL2 =

20pF, R2 = 180Ω

82.6

128.4

3.0V ≤ VDD_ ≤

3.6V, CL1 = 20pF,

R1 = 1kΩ, CL2 =

20pF, R2 = 120Ω

69.9

101.0

2.25V ≤ VDD_ ≤

2.75V, CL1 = 20pF,

R1 = 810Ω, CL2 =

20pF, R2 = 91Ω

65.1

88.9

SDA2 = 0.3 x VDD2

to SDA1 = 0.75V

1.71V ≤ VDD_ ≤

1.89V, CL1 = 20pF,

R1 = 470Ω, CL2 =

20pF, R2 = 81Ω

59.3

79.7

Pulse-Width Distortion

PWD12

|tPLH12 - tPHL12|

4.5V ≤ VDD_ ≤ 5.5V

56.1

94.2

ns

3.0V ≤ VDD_ ≤ 3.6V

48.3

79.0

2.25V ≤ VDD_ ≤

2.75V

43.6

70.6

1.71V ≤ VDD_ ≤

1.89V

39.1

59.8

PWD21

|tPLH21 - tPHL21|

4.5V ≤ VDD_ ≤ 5.5V

5.9

50.7

3.0V ≤ VDD_ ≤ 3.6V

12.6

43.1

2.25V ≤ VDD_ ≤

2.75V

14.1

37.6

1.71V ≤ VDD_ ≤

1.89V

18.0

35.1

Round-Trip Propagation

Delay on Side 1

tLOOP1

SDA1/SCL1 =

0.425V to

SDA1/SCL1 = 0.3 x

VDD1

4.5V ≤ VDD_ ≤

5.5V, CL1 = 40pF,

R1 = 1.6kΩ, CL2 =

400pF, R2 = 180Ω

142.2

163.2

ns

3.0V ≤ VDD_ ≤

3.6V, CL1 = 40pF,

R1 = 1kΩ, CL2 =

400pF, R2 = 120Ω

114.1

133.5

2.25V ≤ VDD_ ≤

2.75V, CL1 = 40pF,

R1 = 810Ω, CL2 =

400pF, R2 = 91Ω

101.3

122.8

SDA1/SCL1 =

0.425V to

SDA1/SCL1 =

0.75V

1.71V ≤ VDD_ ≤

1.89V, CL1 = 40pF,

R1 = 470Ω, CL2 =

400pF, R2 = 81Ω

100.5

128.4

Side 1 Time from UVLO

to Active State

tACT

VDD1 rising, VDD2 powered up for more

than tHS_EN and SDA_/SCL_ high

1.1

1.7

ms