HT45R35 datasheet(4/59 Pages) HOLTEK

4 / 59 page

Pin Name

I/O

Options

Description

RES

Schmitt trigger reset input. Active low

VSS

¾¾

Negative power supply, ground

VDD

¾¾

Positive power supply

OSC1

OSC2

Crystal or RC

OSC1, OSC2 are connected to an RC network or Crystal determined by a

configuration option, for the internal system clock. In the case of the RC

oscillator, OSC2 can be used to monitor the system clock. Its frequency is

1/4 system clock.

Note: *All pull-high resistors are controlled by an option bit.

Absolute Maximum Ratings

Supply Voltage ...........................VSS

-0.3V to VSS+6.0V

Storage Temperature ............................

-50°Cto125°C

Input Voltage..............................VSS

-0.3V to VDD+0.3V

Operating Temperature...........................

-40°Cto85°C

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

IOH Total............................................................

-100mA

Total Power Dissipation .....................................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

Test Conditions

Min.

Typ.

Max.

Unit

VDD

Conditions

VDD

Operating Voltage

fSYS=4MHz

2.2

5.5

fSYS=8MHz

3.3

5.5

IDD1

Operating Current

(Crystal OSC, RC OSC)

No load, fSYS=4MHz

IDD2

Operating Current

(Crystal OSC, RC OSC)

No load, fSYS=8MHz

ISTB1

Standby Current

(WDT Enabled)

No load, system HALT

¾¾

ISTB2

Standby Current

(WDT Disabled)

No load, system HALT

¾¾

VIL1

Input Low Voltage for I/O Ports,

TMR, INT0 and INT1

¾¾

0.3VDD

VIH1

Input High Voltage for I/O Ports,

TMR, INT0 and INT1

¾¾

0.7VDD

VDD

VIL2

Input Low Voltage (RES)

¾¾

0.4VDD

VIH2

Input High Voltage (RES)

¾¾

0.9VDD

VDD

VLVR

Low Voltage Reset

¾ LVRenabled

2.7

3.0

3.3

IOL

I/O, RREF and CREF Sink Current

VOL=0.1VDD

HT45R35

Rev. 1.30

May 14, 2010

HT45R35 Datasheet(PDF) 4 Page - Holtek Semiconductor Inc

HT45R35 Datasheet(HTML) 4 Page - Holtek Semiconductor Inc

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