SA8803 Sames, SA8803 Datasheet

no-image

SA8803

Manufacturer Part Number

SA8803

Description

LIGHT EMITTING DIODE DRIVER

Manufacturer

Sames

Datasheet

1.SA8803.pdf (10 pages)

Current page: 1 of 10
Download datasheet (85Kb)

FEATURES

DESCRIPTION

The block Diagram of the SA8803 is shown in

Fig. 1. A control word is clocked into the

device via the DATA pin with a local clock

provided to pin CLK.

comprises a 3-bit chip address, a 5-bit LED

address and a Status (on/off) bit. Provided

that the Chip Adress matches the setting on

pins AD0..AD2 then the LED State Register is

addressed and the state of the selected LED

is set according to the Status bit in the Control

word.

The LEDs are driven by banks of Constant

Current Sources in which the value of the

current in all six banks is set by a single

external resistor connected between pin

INTENS and VEE. The total current drained

by the device and the LEDs may be fixed at

six times the LED current by connecting pin

CC to GND.

The status of all LEDs can be verified at any

time by pulling the TEST pin low. When tis

happens the contents of the LED Status

Register are clocked out of the SA8803 on the

pin DOUT. An additional test feature is that

al LEDs are illuminated for a short period after

power up to simplify system testing.

4159

Drives 24 LED's under control of Serial

Interface

Light Emitting Diode intensity

programmable using a single resistor

Automatic lamp test facility on reset

(MRST)

Minimal external components

LED intensity constant, regardless of

number of LED's illuminated

The control word

LIGHT EMITTING DIODE DRIVER

PIN CONNECTIONS

DR-00593

LED 1

LED 2

LED 3

LED 4

V EE

LED 5

LED 6

LED 7

V DD

LED 8

LED 9

11 Bit Information word controls up to

192 LED's (using eight SA8803s)

Readback of LED status

Requires a local clock of 8 times the

data rate

Constant current from power supply

option

10

11

12

13

14

15

16

17

7

8

9

6

18

5

19

PDS039-SA8803-001

4

20

3

21

SA8803

2

22

23

1

44

24

43

25

42

26

REV. C

41

27

SA8803

40

28

39

38

37

36

35

34

33

32

31

30

29

07-03-96

TEST

LED 24

LED 23

LED 22

V

LED 21

LED 20

LED 19

V

LED 18

LED 17

EE

DD

1/10

Related parts for SA8803

Related keywords

SA8803 datasheet
SA8803 data sheet
SA8803 pdf datasheet
SA8803 component
SA8803 part
SA8803 distributor
SA8803 RoHS
SA8803 datasheet download