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PCA9952 Datasheet(PDF) 8 Page - NXP Semiconductors

Part # PCA9952
Description  16-channel Fm I2C-bus 57 mA constant current LED driver
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

PCA9952 Datasheet(HTML) 8 Page - NXP Semiconductors

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PCA9952_PCA9955
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2015. All rights reserved.
Product data sheet
Rev. 7.1 — 29 June 2015
8 of 48
NXP Semiconductors
PCA9952; PCA9955
16-channel Fm+ I2C-bus 57 mA constant current LED driver
[1]
In order to obtain the best system level ESD performance, a standard pull-up resistor (10 k
 typical) is
required for any address pin connecting to VDD. For additional information on system level ESD
performance, please refer to application notes AN10897 and AN11131.
[2]
HTSSOP28 package supply ground is connected to both VSS pins and exposed center pad. VSS pins 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.
Table 4.
PCA9955 pin description
Symbol
Pin
Type
Description
REXT
1
I
current set resistor input; resistor to ground
A0
2
I
address input 0[1]
A1
3
I
address input 1[1]
A2
4
I
address input 2[1]
A3
5
I
address input 3[1]
LED0
6
O
LED driver 0
LED1
7
O
LED driver 1
LED2
8
O
LED driver 2
LED3
9
O
LED driver 3
LED4
11
O
LED driver 4
LED5
12
O
LED driver 5
LED6
13
O
LED driver 6
LED7
14
O
LED driver 7
LED8
15
O
LED driver 8
LED9
16
O
LED driver 9
LED10
17
O
LED driver 10
LED11
18
O
LED driver 11
LED12
20
O
LED driver 12
LED13
21
O
LED driver 13
LED14
22
O
LED driver 14
LED15
23
O
LED driver 15
RESET
25
I
active LOW reset input
SCL
26
I
serial clock line
SDA
27
I/O
serial data line
VSS
10, 19, 24[2]
ground
supply ground
VDD
28
power supply
supply voltage


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