UA8888S

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

2 of 8

www.unisonic.com.tw

QW-R109-015,B

PIN CONFIGURATION

1

TRB_1

2

3

REGO 2

REGO 1

FWD

REV

Vcc1

13

12

11

10

9

8

4

5

6

7

MUTE

BIAS

TRB_2

NC

GND

NC

Vcc2

15

16

17

18

19

20

21

22

23

24

25

26

27

28

UA8888S

PIN DESCRIPTION

PIN NO.

PIN NAME

FUNCTION

1

Input for focus driver

2

TRB_1

Connect to external transistor base

3

REGO2

Regulator voltage output, connect to external transistor collector

4

Input for the sled driver

5

REGO1

Regulator voltage output, connect to external transistor collector

6

FWD

Tray driver forward input

7

REV

Tray driver reverse input

8

Vcc for pre-drive block and power block of sled and tray

9

Tray driver output (-)

10

Tray driver output (+)

11

Sled driver output (+)

12

Sled driver output (-)

13

Focus driver output (-)

14

Focus driver output (+)

15

Tracking driver output (+)

16

Tracking driver output (-)

17

Spindle driver output (+)

18

Spindle driver output (-)

19

Vcc for power block of spindle, tracking and focus

20

NC

No Connection

21

Speed control input of tray driver

22

GND

Ground

23

Input for spindle driver

24

NC

No Connection

25

TRB_2

Connect to external transistor base

26

Input for tracking driver

27

BIAS

Input for reference voltage

28

MUTE

Input for mute control

Notes: Symbol of + and – (output of drivers) means polarity to input pin. (Ex. if voltage of pin1 is high, pin14 is high.)