Pad No. Pad Name I/O

Internal

Connection

Description

11

VSS

I

—

Power supply (ground)

12

MODE

I

CMOS

Pull-Low

MODE defines the operating functions of DK1, SK2,

and K3~K6 (refer to the functional description).

13

TEST

I

CMOS

Pull-High

For IC test only

14~16

L1~L3

O

CMOS

Lamp driving signals

L1~L3 generate high SCR trigger signals to control the

lamp intensity.

Approximate internal connection circuit

Absolute Maximum Ratings

Supply Voltage .............................. –0.3V to 5.5V

Storage Temperature................. –50

Operating Temperature............... –20

Electrical Characteristics

(Ta=25

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Condition

Supply Voltage

—

—

4.5

5.0

5.5

V

Operating Current

5V

No load

—

300

600

L1~L4 Output Sink Current

5V

2.0

4.0

—

mA

L1~L4 Output Source Current

5V

–15

–22

—

“H” Input Voltage

—

—

——

V

“L” Input Voltage

—

—

—

—

V

Internal System Frequency

—

AC 60Hz

—

122.9

—

KHz

AC 50Hz

—

102.4

—

HT2040A

3

26th Mar ’97