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PCA9952 Datasheet(PDF) 8 Page - NXP Semiconductors |
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PCA9952 Datasheet(HTML) 8 Page - NXP Semiconductors |
8 / 48 page 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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