BQ20Z655-R1 datasheet(11/25 Pages) TI1

11 / 25 page

1.76

1.77

1.78

1.79

1.8

1.81

-40

-20

T -Free-AirTemperature-°C

POWERONRESETBEHAVIOR

FREE-AIRTEMPERATURE

bq20z655-R1

www.ti.com

SLUSAN9

– AUGUST 2011

POWER-ON RESET

Over operating free-air temperature range (unless otherwise noted), TA = –40°C to 85°C, V(REG25) = 2.41 V to 2.59 V,

V(BAT) = 14 V, C(REG25) = 1 µF, C(REG33) = 2.2 µF; typical values at TA = 25°C (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VIT-

Negative-going voltage input

1.7

1.8

1.9

VHYS

Power-on reset hysteresis

125

200

Active low time after power up or watchdog

tRST

RESET active low time

100

250

560

µs

reset

DATA FLASH CHARACTERISTICS OVER RECOMMENDED OPERATING TEMPERATURE AND

SUPPLY VOLTAGE

Typical values at TA = 25°C and V(REG25) = 2.5 V (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Data retention

Years

Flash programming write-cycles

20k

Cycles

t(ROWPROG)

Row programming time

See (1)

t(MASSERASE) Mass-erase time

200

t(PAGEERASE) Page-erase time

I(DDPROG)

Flash-write supply current

I(DDERASE)

Flash-erase supply current

RAM/REGISTER BACKUP

V(RBI) > V(RBI)MIN , VREG25 < VIT–, TA = 85°C

1000

2500

I(RB)

RB data-retention input current

V(RBI) > V(RBI)MIN , VREG25 < VIT–, TA = 25°C

220

V(RB)

RB data-retention input voltage(1)

1.7

(1)

Specified by design. Not production tested.

SMBus TIMING CHARACTERISTICS

TA = –40°C to 85°C Typical Values at TA = 25°C and VREG25 = 2.5 V (Unless Otherwise Noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

f(SMB)

SMBus operating frequency

Slave mode, SMBC 50% duty cycle

100

kHz

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