HT37B90 datasheet(5/80 Pages) HOLTEK

5 / 80 page

PadName

I/O

Configuration

Option

Function

AUD_IN

PowerAmp.inputpin

VBIAS

PowerAmp.voltagebiasreferencepin.

RES

Schmitt Triggerresetinput,activelow

OSC1

OSC2

CrystalorRC

OSC1, OSC2 are connected to an external RC network or external crystal,

determined by configuration option, for the internal system clock. If the RC

system clock option is selected, pin OSC2 can be used to measure the sys-

temclockat1/8frequency.

Note:

1.EachpinonPA canbeprogrammedthroughaconfigurationoptiontohaveawake-upfunction.

2.Individualpinscanbeselectedtohavepull-highresistors.

3.BecausethetwotimersareusedbyMIDItheexternaltimerpinfunctionsaredisabled.

AbsoluteMaximumRatings

SupplyVoltage ..........................VSS-0.3V to VSS+5.5V

StorageTemperature ...........................

-50°Cto125°C

InputVoltage .............................VSS-0.3Vto VDD+0.3V

OperatingTemperature ..........................

-40°Cto85°C

IOL Total ..............................................................150mA

IOH Total............................................................-100mA

TotalPowerDissipation .....................................500mW

Note: These are stress ratings only. Stresses exceeding the range specified under

²Absolute Maximum Ratings² may

cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed

in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability.

D.C.Characteristics

Ta=25

°C

Symbol

Parameter

TestConditions

Min.

Typ.

Max.

Unit

VDD

Conditions

VDD

OperatingVoltage

fOSC=12.8MHz(37B50/30)

2.4

3.0

5.5

fOSC=12.8MHz(37B90/70)

3.0

5.5

IDD

OperatingCurrent

(Crystal OSC orRC OSC)

Noload,

fOSC=8MHz~12.8MHz,

DAC disable

ISTB1

StandbyCurrent(WDT Disable)

Noload,systemHALT,

WDT disable

ISTB2

StandbyCurrent(WDT Enable)

Noload,systemHALT,

WDT enable

VIL1

InputLowVoltageforI/OPorts

0.3VDD

VIH1

InputHighVoltageforI/OPorts

0.7VDD

VDD

VIL2

InputLowVoltage(RES)

0.4VDD

VIH2

InputHighVoltage(RES)

0.9VDD

VDD

IOL

I/OPortSegmentLogicOutput

SinkCurrent

VOL=0.1VDD

IOH

I/OPortSegmentLogicOutput

SourceCurrent

VOH=0.9VDD

-2

-4

-5

-8

HT37B90/HT37B70/HT37B50/HT37B30

Rev.1.00

June22,2017

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