BQ27000_06 datasheet(4/31 Pages) TI

No. de pieza	BQ27000

Descripción Electrónicos	SINGLE CELL Li-Ion AND Li-Pol BATTERY GAS GAUGE IC FOR PORTABLE APPLICATIONS (bqJUNIOR)

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Fabricante Electrónico	TI [Texas Instruments]

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bq27000, bq27200

SLUS556D – SEPTEMBER 2004 – REVISED MARCH 2006

ELECTRICAL CHARACTERISTICS (continued)

over operating free-air temperature range and supply voltage range (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

STANDARD HDQ SERIAL COMMUNICATION TIMING (bq27000 only)

t(B)

Break timing

190

t(BR)

Break recovery

40

t(CYCH)

Host bit window

190

t(HW1)

Host sends 1

0.5

50

t(HW0)

Host sends 0

86

145

µs

t(RSPS)

bqJUNIOR to host response

190

320

t(CYCD)

bqJUNIOR bit window

190

250

t(DW1)

bqJUNIOR sends 1

32

50

t(DW0)

bqJUNIOR sends 0

80

145

STANDARD I2C SERIAL COMMUNICATION TIMING (bq27200 only)

tr

SCL/SDA rise time

1

µs

tf

SCL/SDA fall time

300

ns

tw(H)

SCL pulse width (high)

4

tw(L)

SCL pulse width (low)

4.7

µs

tsu(STA)

Setup for repeated start

4.7

td(STA)

Start to first falling edge of SCL

4

tsu(DAT)

Data setup time

250

ns

th(DAT)

Data hold time

300

tsu(STOP)

Setup time for stop

4

µs

t(BUF)

Bus free time between stop and start

4.7

f(SCL)

Clock frequency

100

kHz

t(BUSERR)

Bus error timeout

17.3

21.2

s

4

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