AS3642 datasheet(6/27 Pages) AMSCO

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AS3642

Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s

TOVTEMP

Overtemperature

Protection

Junction temperature

144

ºC

TOVTEMPHY

Overtemperature

Hysteresis

5ºC

tFLASHTIMER

Flash Timer

Can be adjusted by register flash_timer (see

page 18)

-7.5% 30 to

480

+7.5%

VUVLO

Undervoltage

Lockout

Falling VVIN

2.3

2.4

2.5

Rising VVIN

VUVLO

+0.05

VUVLO

+0.1

VUVLO

+0.15

Digital Interface

VIH

High Level Input

Voltage

Pins SCL, SDA

1.26

VVIN-

0.2

VIL

Low Level Input

Voltage

0.0

0.54

VOL

Low Level Output

Voltage

Pin SDA with pullup >1k

 to digital supply <2V,

VVIN>2.7V

0.3

2C interface timings - see Figure 3 on page 6

tWAKEUP

Wakeup Time

Minimum time from SDA or SCL going high to

first I

2C start command

500

µs

tTIMEOUT

2C timeout time

In flash, assist light and indicator mode if SCL

and SDA are L for tTIMEOUT, the AS3642 enters

automatically shutdown mode

fSCLK

SCL Clock Frequency

tTIMEO

400

kHz

tBUF

Bus Free Time

Between a STOP and

START Condition

1.3

µs

tHD:STA

Hold Time (Repeated)

START Condition

0.6

µs

tLOW

LOW Period of SCL

Clock

1.3

µs

tHIGH

HIGH Period of SCL

Clock

0.6

µs

tSU:STA

Setup Time for a

Repeated START

Condition

0.6

µs

tHD:DAT

Data Hold Time

00.9

µs

tSU:DAT

Data Setup Time

100

Rise Time of Both

SDA and SCL Signals

20 +

0.1CB

300

Fall Time of Both SDA

and SCL Signals

20 +

0.1CB

300

tSU:STO

Setup Time for STOP

Condition

0.6

µs

Capacitive Load for

Each Bus Line

CB — total capacitance of one bus line in pF

400

Table 3. Electrical Characteristics (Continued)

Symbol

Parameter

Condition

Min

Typ

Max

Unit

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