BQ78350DBT-R1 datasheet(7/32 Pages) TI1

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bq78350-R1

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SLUSCD0 – AUGUST 2015

8.8 Electrical Characteristics: Power-On Reset

VCC = 2.4 V to 2.6 V, TA = –40°C to 85°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

8.9

Electrical Characteristics: Oscillator

VCC = 2.4 V to 2.6 V, TA = –40°C to 85°C (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

f(OSC)

Operating frequency

4.194

MHz

–3%

0.25%

f(EIO)

Frequency error(1)(2)

TA = 20°C to 70°C

–2

0.25

t(SXO)

Start-up time(3)

2.5

LOW FREQUENCY OSCILLATOR

f(LOSC)

Operating frequency

32.768

kHz

–2.5%

0.25%

2.5%

f(LEIO)

Frequency error(2)(4)

TA = 20°C to 70°C

–1.5

0.25

1.5

t(LSXO)

Start-up time(5)

500

(1)

The frequency error is measured from 4.194 MHz.

(2)

The frequency drift is included and measured from the trimmed frequency at VCC = 2.5 V, TA = 25°C.

(3)

The start-up time is defined as the time it takes for the oscillator output frequency to be within 1% of the specified frequency.

(4)

The frequency error is measured from 32.768 kHz.

(5)

The start-up time is defined as the time it takes for the oscillator output frequency to be ±3%.

8.10 Electrical Characteristics: Data Flash Memory

VCC = 2.4 V to 2.6 V, TA = –40°C to 85°C (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Data retention

See note(1)

Years

tDR

Flash programming write-cycles

See note(1)

20,000

Cycles

t(WORDPROG)

Word programming time

See note(1)

I(DDdPROG)

Flash-write supply current

See note(1)

(1)

Specified by design. Not production tested.

8.11 Electrical Characteristics: Register Backup

VCC = 2.4 V to 2.6 V, TA = –40°C to 85°C (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

V(RB) > V(RBMIN), VCC < VIT–

1500

RB data-retention input

I(RB)

V(RB) > V(RBMIN), VCC < VIT–, TA = 0°C

current

160

to 50°C

RB data-retention

V(RB)

1.7

voltage (1)

8.12 SMBus Timing Specifications

VCC = 2.4 V to 2.6 V, TA = –40°C to 85°C (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

NOM

MAX

UNIT

SMBus operating

fSMB

SLAVE mode, SMBC 50% duty cycle

100

kHz

frequency

SMBus master clock

MASTER mode, no clock low slave

fMAS

51.2

kHz

frequency

extend

Bus free time between

tBUF

4.7

µs

start and stop

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