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DA1634.001

28 November, 2008

MAS1634 SAMPLES IN DIL-20 PACKAGE

1

2

VDD1 3

XPD 4

IN1 5

IN2 6

IN3 7

IN4 8

VDD2 9

10

20

19 GND1

18

17 OUT1

16 OUT2

15 OUT3

14 OUT4

13 GND2

12

11

Top Marking Definitions:

YYWW = Year Week

XXXXX.X = Lot Number

xx = Sample Version

PIN DESCRIPTION

Pin Name

Pin

Type

Function

Note

1

NC

2

NC

VDD1

3

P

Positive Power Supply

1

XPD

4

DI

Power Down Input

3

IN1

5

DI

LED Current Driver Input 1

4

IN2

6

DI

LED Current Driver Input 2

4

IN3

7

DI

LED Current Driver Input 3

4

IN4

8

DI

LED Current Driver Input 4

4

VDD2

9

P

Positive Power Supply

1

10

NC

11

NC

12

NC

GND2

13

G

Power Supply Ground

2

OUT4

14

AO

LED Current Driver Output 4

OUT3

15

AO

LED Current Driver Output 3

OUT2

16

AO

LED Current Driver Output 2

OUT1

17

AO

LED Current Driver Output 1

18

NC

GND1

19

G

Power Supply Ground

2

20

NC

A = Analog, D = Digital, P = Power, G = Ground, I = Input, O = Output, NC = Not Connected

Notes:

1) Keep VDD1 and VDD2 in same potential since both are internally connected together. Due to internal

connection it is only necessary to connect at least one of the two VDD pins to supply voltage.

2) Keep GND1 and GND2 in same potential since both are internally connected together. Due to internal

connection it is only necessary to connect at least one of the two GND pins to supply ground.

3) Power down mode when XPD is low and operating mode when XPD is high.

4) Each led driver input has 1.7MΩ ± 15% pull-down resistor but which are in an inactive high impedance

state if the XPD input is low (i.e. power down mode). This is the reason why XPD pin requires external

control to achieve properly controlled operation.