HT9480 datasheet(6/57 Pages) HOLTEK

6 / 57 page

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

VDD

Conditions

IOL

PC0~PC1 Sink Current

VOL=0.3V

1.7

3.4

—

IOH

PC0~PC1 Source Current

if Pull-High Mask Option

VOH=2.7V

–1

–1.9

—

IOL

BS1, BS2, BS3, FOUT Sink

Current

VOL=0.3V

350

—

µA

IOH

BS1, BS2, BS3, FOUT

Source Current

VOH=2.7V

–0.9

—

RPH

Pull-High I/O Port

Resistance

—

100

200

500

Ω

A.C. Characteristics

(Ta=25

°C)

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

VDD Conditions

fSYS1

System Clock (RC OSC)

—

76.8

256

1000

kHz

fSYS2

System Clock (Crystal OSC)

—

76.8

256

1000

kHz

fSUBSYS

Pager Subsystem Clock

(Crystal OSC)

—

32.768

76.8

153.6

kHz

fTIMER

Timer I/P Frequency (TMR1)

—

1000

kHz

tRES

External Reset Low Pulse Width

—

µs

tINT

Interrupt Pulse Width

—

µs

* Note: tSYS=1/fSYS

HT9480

23th Feb ’98

HT9480 Datasheet(PDF) 6 Page - Holtek Semiconductor Inc

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