Table of Contents

1 Features............................................................................1

2 Applications..................................................................... 1

3 Description.......................................................................1

4 Pin Configuration and Functions...................................2

Pin Functions.................................................................... 2

5 Specifications.................................................................. 4

5.1 Absolute Maximum Ratings........................................ 4

5.2 ESD Ratings............................................................... 4

5.3 Recommended Operating Conditions.........................4

5.4 Thermal Information....................................................4

5.5 Electrical Characteristics.............................................6

5.6 I2C Interface (SCL and SDA Pins) Timing

Requirements................................................................ 7

5.7 Typical Characteristic..................................................7

6 Detailed Description........................................................8

6.1 Overview..................................................................... 8

6.2 Functional Block Diagram........................................... 8

6.3 Feature Description.....................................................9

6.4 Device Functional Modes............................................9

6.5 Programming............................................................ 10

6.6 Register Maps...........................................................13

7 Device and Documentation Support............................20

7.1 Receiving Notification of Documentation Updates....20

7.2 Community Resources..............................................20

7.3 Trademarks...............................................................20

8 Revision History............................................................ 20

4 Pin Configuration and Functions

24

23

22

21

20

19

7

8

9

10

11

12

1

2

3

4

5

6

18

17

16

15

14

13

Figure 4-1. RTW Package 24-Pin WQFN With Exposed Pad Top View

Pin Functions

PIN

I/O

DESCRIPTION

NUMBER

NAME

1

LED0

Output

Output of LED0 Driver

2

LED1

Output

Output of LED1 Driver

3

LED2

Output

Output of LED2 Driver

4

LED3

Output

Output of LED3 Driver

5

LED4

Output

Output of LED4 Driver

6

LED5

Output

Output of LED5 Driver

7

LED6

Output

Output of LED6 Driver

8

LED7

Output

Output of LED7 Driver

9

GND

Ground

Ground

10

LED8

Output

Output of LED8 Driver

11

LED9

Output

Output of LED9 Driver

12

LED10

Output

Output of LED10 Driver

13

LED11

Output

Output of LED11 Driver

LP3943

SNVS256E – NOVEMBER 2003 – REVISED OCTOBER 2024

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