Pin No.

Pin Name

I/O

Internal

Connection

Description

16

TGU

I

Pull-High

Switch to Upward step mode

17

TGD

I

Pull-High

Switch to Downward step mode (internal pull-high)

18

ROB

I

Pull-High

Switch to Robot mode (internal pull-high)

Absolute Maximum Ratings*

Supply Voltage ................................. –0.3V to 6V

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

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

*Note: These are stress ratings only. Stresses exceeding the range specified under “Absolute Maxi-

mum Ratings” may cause substantial damage to the device. Functional operation of this

device at other conditions beyond those listed in the specification is not implied and prolonged

exposure to extreme conditions may affect device reliability.

Electrical Characteristics

(Ta=25

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

Conditions

Operating Voltage

—

—

2.4

3.0

4.0

V

Operating Current

3V

No load,

—

2.0

10

mA

Input Signal

3V

—

—

—

580

mV

Lamp Sink Current

3V

5.0

9.5

—

mA

OPA Gain Value

3V

Open loop

—

2000

—

Audio Output Voltage

3V

During silence

—

–1.0

—

mA

“H” Input Voltage

—

—

——

V

“L” Input Voltage

—

—

—

—

V

Oscillating Frequency

3V

Ω

—

512

—

kHz

HT8950

4

5th May ’98