pca9546abs NXP Semiconductors, pca9546abs Datasheet - Page 5

• Manufacturer Part Number: pca9546abs
• Description: 4-channel I2c Switch With Reset
• Manufacturer: NXP Semiconductors

Philips Semiconductors
6. Functional description
PCA9546A_4
Product data sheet
5.2 Pin description
6.1 Device address
Table 3.
[1]
Refer to
Following a START condition, the bus master must output the address of the slave it is
accessing. The address of the PCA9546A is shown in
internal pull-up resistors are incorporated on the hardware selectable address pins and
they must be pulled HIGH or LOW.
The last bit of the slave address defines the operation to be performed. When set to
logic 1 a read is selected, while a logic 0 selects a write operation.
Symbol
A0
A1
RESET
SD0
SC0
SD1
SC1
V
SD2
SC2
SD3
SC3
A2
SCL
SDA
V
Fig 5. Slave address
SS
DD
HVQFN package die supply ground is connected to both the V
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.
Figure 1 “Block diagram of
Pin description
Pin
SO, TSSOP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Rev. 04 — 29 August 2006
1
HVQFN
15
16
1
2
3
4
5
6
7
8
9
10
11
12
13
14
[1]
1
fixed
PCA9546A”.
1
0
Description
address input 0
address input 1
active LOW reset input
serial data 0
serial clock 0
serial data 1
serial clock 1
supply ground
serial data 2
serial clock 2
serial data 3
serial clock 3
address input 2
serial clock line
serial data line
supply voltage
A2
selectable
hardware
A1
4-channel I
A0 R/W
002aab189
SS
Figure
pin and the exposed center pad. The V
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
5. To conserve power, no
2
C-bus switch with reset
PCA9546A
5 of 25
SS