HTG1390 datasheet(6/27 Pages) HOLTEK

6 / 27 page

D.C. Characteristics

Ta=25

°C

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

VDD

Conditions

VDD

Operating Voltage

—

1.2

1.5

1.8

IDD

Operating Current

1.5V

No load,

fSYS=256kHz

—20

—

µA

ISTB

Standby Current

1.5V

No load,

HALT mode

——

µA

VIL

Input Low Voltage

1.5V

—

0.4

VIH

Input High Voltage

1.5V

—

1.0

—

1.5

IOL1

Port A, BZ & BZ Output Sink

Current

1.5V

VDD=1.5V,

VOL=0.15V

100

—

µA

IOH1

Port A, BZ & BZ Output

Source Current

1.5V

VDD=1.5V,

VOH=1.35V

600

700

—

µA

IOL2

Segment Output Sink

Current

1.5V VLCD=3V, VOL=0.3V

100

150

—

µA

IOH2

Segment Output Source

Current

1.5V VLCD=3V, VOH=2.7V

–20

–40

—

µA

RPH

Pull–high Resistance

1.5V PS, PP, RES

—

300

Ω

A.C. Characteristics

Ta=25

°C

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

VDD

Conditions

fSYS

System Clock

1.5V R:36k

Ω~2MΩ

—

400

kHz

fLCD

LCD Clock

1.5V

—

128*

—

tCOM

LCD Common Period

—

1/3 duty

—

(1/fLCD)

×3—

tCY

Cycle Time

—

fSYS=256kHz

—

µs

tRES

Reset Pulse Width

—

fSOUND

Sound Effect Clock

—

64 or 128

—

kHz

Notes: * In general, fLCD is selected and optimized by Holtek depending upon fSYS and the operating

voltage.

** Only these two clocking signal frequencies are supported by the Holtek sound library.

HTG1390

Preliminary

17th Nov ’98

HTG1390 Scheda tecnica(PDF) 6 Page - Holtek Semiconductor Inc

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