FUSB251

www.onsemi.com

7

Symbol

Unit

Max

Typ

Min

Conditions

Parameter

SBU Switch ON capacitance (Note 1)

VDD = 2.7 to 5.5 V, Capacitance

from SBUx or SBUx_H to GND.

Switch closed, VSW = 0 − VDD,

25

pF

CC channel bandwidth (Note 1)

VDD = 3.6 V, −3 dB bandwidth,

RL = 50 W, CL = 200 pF

25

MHz

SBU switch Bandwidth (Note 1)

VDD = 3.6 V, −3 dB bandwidth

between SBUx and SBUx_H.

Singled ended, RL = 50 W

30

MHz

Timer of CC moisture detection (Note 1)

VDD = 2.7 to 5.5 V,

Timer for searching both CC rise.

Timer reset at both CC rising.

108

120

132

ms

Dry check period (Note 1)

VDD = 2.7 to 5.5 V, Timer period of

SBU moisture detection for Dry

check, Programmable

0.1

10

s

Time between SBU1 and SBU2 mois-

ture detection (Note 1)

VDD = 2.7 to 5.5 V, SBU moisture

detection enabled and measure

time voltage source on from SBU1

to SBU2

0.9

1.0

1.1

ms

Moisture detection start voltage when

both CC1 and CC2 rise

VDD = 2.7 to 5.5 V

130

200

270

mV

INTB output Low voltage

VDD = 2.7 to 5.5 V

0.4

V

SDA, SCL High level input voltage

VDD = 2.7 to 5.5 V

1.2

V

SDA, SCL Hysteresis of Schmitt Trigger

Inputs

VDD = 2.7 to 5.5 V

200

mV

Input Current of SDA and SCL Pins

VDD = 2.7 to 5.5 V,

Input Voltage 0 to VDD

−0.5

0.5

mA

ICCT_I2C

VDD current when SDA or SCL is HIGH Input voltage is 1.8 V

−0.5

2.5

mA

Low−Level Output Voltage

VDD = 2.7 to 5.5 V, 2 mA sink cur-

rent, Pull up to VDD

0

0.3

V

Capacitance on SDA and SCL (Note 1)

VDD = 2.7 to 5.5 V

10

pF

f_SCL

I2C SCL clock frequency

400

kHz

tHD ; STA

Hold Time (Repeated) START Condition

0.6

ms

tLOW

LOW Period of I2C_SCL Clock

1.3

ms

tHIGH

High Period of I2C_SCL Clock

0.6

ms

tSU ; STA

Set−up Time for Repeated START

Condition

0.6

ms

tHD ; DAT

Data Hold Time

0

0.9

ms

tSU ; DAT

Data Set−up Time

100

ns

tR

Rise Time of I2C_SDA and I2C_SCL

Signals

20 ×

(VDD/5.5 V)

250

ns

tF

Fall Time of I2C_SDA and I2C_SCL

Signals

20×

(VDD/5.5 V)

250

ns

tSU ; STO

Set−up Time for STOP Condition

0.6

ms

tBUF

BUS−Free Time between STOP and

START Conditions

1.3

ms

tSP

Pulse Width of Spikes that Must Be

Suppressed by the Input Filter

0

50

ns

Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product

performance may not be indicated by the Electrical Characteristics if operated under different conditions.

1. Guaranteed by Design, Characterization, not Production tester.