PCA9685BS datasheet(4/51 Pages) NXP

Part #	PCA9685BS

Description	16-channel, 12-bit PWM Fm I2C-bus LED controller

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Manufacturer	NXP [NXP Semiconductors]

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PCA9685

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Product data sheet

Rev. 3 — 2 September 2010

4 of 51

NXP Semiconductors

PCA9685

16-channel, 12-bit PWM Fm+ I2C-bus LED controller

5.

Block diagram

Remark: Only one LED output shown for clarity.

Fig 1.

Block diagram of PCA9685

A0

A1

A2

A3

A4

A5

002aac824

I2C-BUS

CONTROL

INPUT FILTER

PCA9685

POWER-ON

RESET

SCL

SDA

VDD

VSS

LED

STATE

SELECT

REGISTER

PWM

REGISTER X

BRIGHTNESS

CONTROL

MUX/

CONTROL

OE

'0' – permanently OFF

'1' – permanently ON

VDD

LEDn

PRESCALE

25 MHz

OSCILLATOR

CLOCK

SWITCH

EXTCLK

Similar Part No. - PCA9685BS

Manufacturer	Part #	Datasheet	Description
NXP Semiconductors	PCA9685BS	249Kb / 50P	16-channel, 12-bit PWM Fm I2C-bus LED controller Rev. 02-16 July 2009
NXP Semiconductors	PCA9685BS	1Mb / 51P	16-channel, 12-bit PWM Fm I2C-bus LED controller Rev. 3-2 September 2010

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Manufacturer	Part #	Datasheet	Description
NXP Semiconductors	PCA9685	1Mb / 51P	16-channel, 12-bit PWM Fm I2C-bus LED controller Rev. 3-2 September 2010
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PCA9685BS Datasheet(PDF) 4 Page - NXP Semiconductors

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