PCA9544APW(2008) データシートの表示（PDF） - NXP Semiconductors.
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PCA9544APW Datasheet PDF : 26 Pages
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NXP Semiconductors
PCA9544A
4-channel I2C-bus multiplexer with interrupt logic
5.2 Pin description
Table 3.
Symbol
A0
A1
A2
INT0
SD0
SC0
INT1
SD1
SC1
VSS
INT2
SD2
SC2
INT3
SD3
SC3
INT
SCL
SDA
VDD
Pin description
Pin
SO20, TSSOP20
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
HVQFN20
19
20
1
2
3
4
5
6
7
8[1]
9
10
11
12
13
14
15
16
17
18
Description
address input 0
address input 1
address input 2
active LOW interrupt input 0
serial data 0
serial clock 0
active LOW interrupt input 1
serial data 1
serial clock 1
supply ground
active LOW interrupt input 2
serial data 2
serial clock 2
active LOW interrupt input 3
serial data 3
serial clock 3
active LOW interrupt output
serial clock line
serial data line
supply voltage
[1] HVQFN20 package 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.
PCA9544A_3
Product data sheet
Rev. 03 — 24 November 2008
© NXP B.V. 2008. All rights reserved.
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