Data Sheet Rev. B, January 2020 | Subject to change without notice

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ACT4921

Power Loss Protection with 6A eFuse

I2C INTERFACE ELECTRICAL CHARACTERISTICS

(VIN = 5V, TA = 25°C, unless otherwise specified.)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SCL, SDA Input Low

VIO = 1.8V

0.58

V

SCL, SDA Input High

VIO = 1.8V

1.22

V

SDA Leakage Current

SDA=5V

1

µA

SDA Output Low

IOL = 5mA

0.35

V

SCL Clock Frequency, fSCL

1000

kHz

SCL Low Period, tLOW

0.5

µs

SCL High Period, tHIGH

0.26

µs

SDA Data Setup Time, tSU

50

ns

SDA Data Hold Time, tHD

(Note 1)

0

ns

Start Setup Time, tST

For Start Condition

260

ns

Stop Setup Time, tSP

For Stop Condition

260

ns

Capacitance on SCL or SDA Pin

10

pF

SDA Rise Time SDA, Tr

Device requirement

120

ns

SDA Fall Time SDA, Tf

Device requirement

120

ns

Note 1: Comply with I2C timings for 1MHz operation - “Fast Mode Plus”.

Note 2: No internal timeout for I2C operations, however, I2C communication state machine will be reset when entering UV/POR State.

Note 3: This is an I2C system specification only. Rise and fall time of SCL & SDA not controlled by the device.

Note 4: Device Address is factory configurable to 7’h1A, 7’h3A, 7’h5A.

Figure 2: I2C Data Transfer

SDA

SCL

tST

tSU

tHD

tSP

tSCL

Start

condition

Stop

condition