HT48CA0 datasheet(5/36 Pages) HOLTEK

5 / 36 page

D.C. Characteristics

Ta=25

°C

Symbol

Parameter

Test Conditions

Min.

Typ.

Max. Unit

VDD

Conditions

VDD

Operating Voltage

—

2.2

—

3.6

IDD

Operating Current

No load,

fSYS=4MHz

—

0.7

1.5

ISTB

Standby Current

No load,

system HALT

——

µA

VIL1

Input Low Voltage for I/O Ports

—

1.05

VIH1

Input High Voltage for I/O Ports

—

1.95

—

VIL2

Input Low Voltage (RES)

—

1.5

—

VIH2

Input High Voltage (RES)

—

2.4

—

IOL

I/O Ports Sink Current

VOL=0.3V

1.5

2.5

—

IOH

I/O Ports Source Current

VOH=2.7V

–1

–1.5

—

RPH1

Pull-high Resistance of PA

Port, PB0~PB1 and RES

—

Ω

RPH2

Pull-high Resistance of PB2~PB7

—

Ω

VLVR

Low Voltage Reset

—

1.8

2.0

2.2

A.C. Characteristics

Ta=25

°C

Symbol

Parameter

Test Conditions

Min.

Typ. Max. Unit

VDD

Conditions

fSYS

System Clock

—

400

—

4000

kHz

tRES

External Reset Low Pulse Width

—

µs

tSST

System Start-up timer

Period

—

Power-up or

wake-up from halt

—1024

—

tSYS

Note: tSYS=1/fSYS

HT48CA0

23rd July ’98

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