BQ29312A_15 datasheet(6/39 Pages) TI1

Part #	BQ29312A

Description	FOUR-CELL LITHIUM-ION

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Manufacturer	TI1 [Texas Instruments]

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AC ELECTRICAL CHARACTERISTICS

AC TIMING SPECIFICATIONS (I2C COMPATIBLE SERIAL INTERFACE)

tsu(STA)

SCLK

SDATA

SCLK

SDATA

SCLK

SDATA

tw(H)

tw(L)

tf

tr

tf

Start

Condition

SDA

Input

SDA

Change

Stop

Condition

th(STA)

th(DAT)

tsu(DAT)

th(ch)

Start Condition

tv

1

2

3

7

8

9

MSB

ACK

Stop Condition

tsu(STOP)

1

2

3

7

8

9

MSB

ACK

tsu(BUF)

bq29312A

SLUS629A – JANUARY 2005 – REVISED AUGUST 2005

T

A = 25°C, C(REG) = 4.7 µF, BAT = 14 V (unless otherwise noted)

PARAMETER

TEST CONDITION

MIN

NOM

MAX

UNIT

t(WDTINT)

WDT start-up detect time

250

700

2000

ms

t(WDWT)

WDT detect time

100

µs

PARAMETER

MIN

MAX

UNIT

tr

SCLK SDATA rise time

1000

ns

tf

SCLK SDAT fall time

300

ns

tw(H)

SCLK pulse width high

4.0

µs

tw(L)

SCLK pulse width low

4.7

µs

tsu(STA)

Setup time for START condition

4.7

µs

th(STA)

START condition hold time after which first clock pulse is generated

4.0

µs

tsu(DAT)

Data setup time

250

ns

th(DAT)

Data hold time

0

µs

tsu(STOP)

Setup time for STOP condition

4.0

µs

tsu(BUF)

Time the bus must be free before new transmission can start

4.7

µs

t V

Clock low to data out valid

900

ns

th(CH)

Data out hold time after clock low

0

ns

fSCL

Clock frequency

0

100

kHz

6

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