PCA9547 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 4 — 1 April 2014 5 of 30
NXP Semiconductors
PCA9547
8-channel I
2
C-bus multiplexer with reset
5.2 Pin description
[1] HVQFN24 package die supply ground is connected to both the V
SS
pin and the exposed center pad. The
V
SS
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.
Table 3. Pin description
Symbol Pin Description
SO24, TSSOP24 HVQFN24
A0 1 22 address input 0
A1 2 23 address input 1
RESET
3 24 active LOW reset input
SD0 4 1 serial data output 0
SC0 5 2 serial clock output 0
SD1 6 3 serial data output 1
SC1 7 4 serial clock output 1
SD2 8 5 serial data output 2
SC2 9 6 serial clock output 2
SD3 10 7 serial data output 3
SC3 11 8 serial clock output 3
V
SS
12 9
[1]
supply ground
SD4 13 10 serial data output 4
SC4 14 11 serial clock output 4
SD5 15 12 serial data output 5
SC5 16 13 serial clock output 5
SD6 17 14 serial data output 6
SC6 18 15 serial clock output 6
SD7 19 16 serial data output 7
SC7 20 17 serial clock output 7
A2 21 18 address input 2
SCL 22 19 serial clock line
SDA 23 20 serial data line
V
DD
24 21 supply voltage
