HT2844 查看數據表（PDF） - Holtek Semiconductor

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HT2844

4-Sound Generator

Holtek Semiconductor 

HT2844

Pin No.

12

13

14

15

16

Pin Name

KEY1

KEY2

KEY3

KEY4

LED

I/O

Description

I KEY1 input, low active

I KEY2 input, low active

I KEY3 input, low active

I KEY4 input, low active

O LED flash output

Absolute Maximum Ratings*

Supply Voltage ................................. –0.3V to 5V

Input Voltage.................... VSS–0.3 to VDD+0.3V

Storage Temperature................. –50°C to 125°C

Operating Temperature................... 0°C to 70°C

*Note: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent

damageto the device. These are stress ratings only. Functional operation of this device at

these or any other conditions above those indicated in the operational sections of this

specification is not implied and exposure to absolute maximum rating conditions for extended

periods may affect device reliability.

Electrical Characteristics

Symbol

Parameter

VDD

ISTB

IDD

IOH

IOL

ILED

FOSC

VIH

VIL

Operating Voltage

Standby Current

Operating Current

OUT Source Current

OUT Sink Current

LED Source Current

Oscillator Frequency

“H” Input Voltage

“L” Input Voltage

Test Conditions

VDD Conditions

—

—

3V

—

3V No load

3V VOH=2.5V

3V VOL=0.5V

3V VOL=2.5V

— R=220kΩ

3V

—

3V

—

Min.

2.4

—

—

–1

1

–1

—

2.4

—

(Ta=25°C)

Typ. Max. Unit

3

3.3 V

1

5

µA

300 600 µA

–2

— mA

2

— mA

–2

— mA

128

— kHz

—

—

V

—

0.6 V

3

11th July ’97

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