PCA9531D Ver la hoja de datos (PDF) - NXP Semiconductors.

Número de pieza

componentes Descripción

Fabricante

PCA9531D

8-bit I2C-bus LED dimmer

NXP Semiconductors. 

NXP Semiconductors

PCA9531

8-bit I2C-bus LED dimmer

Table 2.

Symbol

VSS

LED4

LED5

LED6

LED7

RESET

SCL

SDA

VDD

Pin description …continued

Pin

Description

SO16,

TSSOP16

HVQFN16

8

6[1]

supply ground

9

7

LED driver 4

10

8

LED driver 5

11

9

LED driver 6

12

10

LED driver 7

13

11

reset input (active LOW)

14

12

serial clock line

15

13

serial data line

16

14

supply voltage

[1] HVQFN16 package die supply ground is connected to both VSS pin and exposed center pad. VSS pin must

be connected to supply ground for proper device operation. For enhanced thermal, electrical, and board

level performance, the exposed pad needs to be soldered to the board using a corresponding thermal pad

on the board and for proper heat conduction through the board, thermal vias need to be incorporated in the

PCB in the thermal pad region.

6. Functional description

Refer to Figure 1 “Block diagram of PCA9531”.

6.1 Device address

Following a START condition, the bus master must output the address of the slave it is

accessing. The address of the PCA9531 is shown in Figure 5. To conserve power, no

internal pull-up resistors are incorporated on the hardware selectable address pins and

they must be pulled HIGH or LOW.

slave address

1 1 0 0 A2 A1 A0 R/W

fixed

hardware

selectable

002aac505

Fig 5. PCA9531 slave address

The last bit of the address byte defines the operation to be performed. When set to logic 1

a read is selected, while a logic 0 selects a write operation.

PCA9531_6

Product data sheet

Rev. 06 — 19 February 2009

© NXP B.V. 2009. All rights reserved.

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