Block Diagram

Pad Coordinates

Unit:

mm

Pad

No.

XY

Pad

No.

XY

1

-957.0

720.5

10

732.0

-774.0

2

-957.0

423.5

11

984.0

-675.0

3

-957.0

210.0

12

956.5

-400.0

4

-957.0

-87.0

13

956.5

374.5

5

-957.0

-299.5

14

956.5

671.5

6

-957.0

-596.5

15

530.5

765.5

7

-962.0

-815.0

16

345.50

765.5

8

-161.5

-747.5

17

-33.50

765.5

9

200.5

-747.5

18

-287.50

765.5

Chip size: 2350

The IC substrate should be connected to VSS in the PCB layout artwork.

Pin Description (HT8950)

Pin No.

Pin Name

I/O

Internal

Connection

Description

1~3

SW0~SW2

I

Pull-High

Function setting pin (for electronic setting)

4

VSS

I

¾

Negative power supply, ground

5AO

O

¾

Internal amplifier output

6

AIN

I

¾

Internal amplifier input (inverted)

7

VDD

O

¾

Positive power supply

8

LAMP

O

NMOS

Open Drain

Lamp output (the brightness changes with the voice volume)

HT8950/HT8950A

Rev. 1.10

2

November 16, 2006

O s c i l l a t o r

G e n e r a t o r

T i m e B a s e

G e n e r a t o r

C o n t r o l

C i r c u i t

P o w e r O n

C i r c u i t

A / D

C o n v e r t e r

D / A

C o n v e r t e r

S R A M

L a t c h

T G U

T G D V I B R O B

S W 0

S W 1

S W 2

A U D I O

V S S

V D D

O S C 2

F V I B

A O

A I N

V R E F

T S

L A M P

O S C 1

1

1 0

2

1 1

3

1 2

4

1 3

5

1 4

6

1 5

7

1 6

8

1 7

9

1 8

( 0 , 0 )

T G U

V S S

A U D I O

L A M P

T G D

R O B

S W 0

S W 1

S W 2

T S

V R E F