MAX6946CAWE Просмотр технического описания (PDF) - Maxim Integrated

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MAX6946CAWE

10-Port, Constant-Current LED Driver and I/O Expander with PWM Intensity Control

Maxim Integrated 

10-Port, Constant-Current LED Driver and

I/O Expander with PWM Intensity Control

PIN

MAX6946/

MAX6947

MAX6946C

1

B4

2

B3

3

C4

4

C3

5

D4

6

D3

7

D2

8

D1

9

C2

10

C1

11

B1

12

B2

13

A1

14

A2

15

A3

16

A4

—

—

Pin Description

NAME

FUNCTION

P0

P1

P2

P3

P4

GND

P5

P6

P7

P8

P9

OSC (MAX6946)

AD0 (MAX6947)

RST

VDD

SCL

SDA

EP

I/O Ports. Configure P0–P4 as open-drain current sink outputs rated at

20mA (max), as CMOS-logic inputs, or as open-drain logic outputs.

Connect loads to a supply voltage no higher than 7V.

Ground

I/O Ports. Configure P5–P9 as open-drain current sink outputs rated at

20mA (max), as CMOS-logic inputs, or as open-drain logic outputs.

Connect loads to a supply voltage no higher than 7V.

External Oscillator Input

Address Input. Sets the device slave address (see Table 10).

Active-Low Reset Input

Positive Supply Voltage. Bypass VDD to GND with a 0.1µF ceramic capacitor.

I2C-Compatible, Serial-Clock Input

I2C-Compatible, Serial-Data I/O

Exposed Pad on Package Underside. Connect to GND. Do not use as the

main ground connection.

Block Diagram

CURRENT REFERENCE

RAMP-UP/RAMP-DOWN

CONTROLS

P0

INTERNAL

OSCILLATOR

PWM CONTROLLER

P1

P2

I/O PORTS

P3

P4

P5

P6

OSC*

EXTERNAL CLOCK INPUT*

P7

P8

P9

MAX6946

MAX6947

CONFIGURATION

REGISTER

I/O REGISTER

ADO**

SCL

SDA

**MAX6946 ONLY. RST

**MAX6947 ONLY.

2-WIRE SERIAL INTERFACE

6 _______________________________________________________________________________________

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