HT9480(1998) View Datasheet(PDF) - Holtek Semiconductor

Part Name

Description

Manufacturer

HT9480
(Rev.:1998)

Pager Controller

Holtek Semiconductor 

HT9480

Symbol

Parameter

Test Conditions

VDD

Conditions

IOL

PC0~PC1 Sink Current

3V VOL=0.3V

IOH

PC0~PC1 Source Current

if Pull-High Mask Option

3V VOH=2.7V

IOL

BS1, BS2, BS3, FOUT Sink

Current

3V

VOL=0.3V

IOH

BS1, BS2, BS3, FOUT

Source Current

3V VOH=2.7V

RPH

Pull-High I/O Port

Resistance

3V

—

Min. Typ. Max. Unit

1.7 3.4 — mA

–1 –1.9 — mA

350 — — µA

–0.9 — — mA

100 200 500 kΩ

A.C. Characteristics

(Ta=25°C)

Symbol

Parameter

fSYS1

fSYS2

fSUBSYS

System Clock (RC OSC)

System Clock (Crystal OSC)

Pager Subsystem Clock

(Crystal OSC)

Test Conditions

VDD Conditions

3V

—

3V

—

Min.

76.8

76.8

Typ. Max. Unit

256 1000 kHz

256 1000 kHz

3V

—

32.768 76.8 153.6 kHz

fTIMER Timer I/P Frequency (TMR1)

3V

—

tRES

External Reset Low Pulse Width —

—

tINT

Interrupt Pulse Width

—

—

0

— 1000 kHz

1

—

—

µs

1

—

—

µs

* Note: tSYS=1/fSYS

6

23th Feb ’98

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