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PCA8575PW,112

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30
PCA8575_2 © NXP B.V. 2007. All rights reserved.
Product data sheet Rev. 02 — 21 March 2007 4 of 30
NXP Semiconductors
PCA8575
Remote 16-bit I/O expander for I
2
C-bus with interrupt
Fig 5. Pin configuration for SSOP24
(QSOP24)
Fig 6. Pin configuration for SSOP24
Fig 7. Pin configuration for HVQFN24 Fig 8. Pin configuration for DHVQFN24
INT V
DD
AD1 SDA
AD2 SCL
P00 AD0
P01 P17
P02 P16
P03 P15
P04 P14
P05 P13
P06 P12
P07 P11
V
SS
P10
PCA8575DK
002aac672
1
2
3
4
5
6
7
8
9
10
11
12
14
13
16
15
18
17
20
19
22
21
24
23
PCA8575DB
INT V
DD
AD1 SDA
AD2 SCL
P00 AD0
P01 P17
P02 P16
P03 P15
P04 P14
P05 P13
P06 P12
P07 P11
V
SS
P10
002aac673
1
2
3
4
5
6
7
8
9
10
11
12
14
13
16
15
18
17
20
19
22
21
24
23
V
DD
SDA
SCL
002aac674
PCA8575BS
Transparent top view
P13
P04
P05
P14
P03 P15
P02 P16
P01 P17
P00 AD0
P06
P07
P10
P11
P12
AD2
AD1
INT
terminal 1
index area
6
13
5
14
4 15
3 16
2 17
1
18
7
8
9
10
11
12
24
23
22
21
20
19
V
SS
INT
V
DD
AD1 SDA
AD2 SCL
P00 AD0
P01 P17
P02 P16
P03 P15
P04 P14
P05 P13
P06 P12
P07 P11
V
SS
P10
002aac675
PCA8575BQ
Transparent top view
11 14
10 15
9 16
8 17
7 18
6 19
5 20
4 21
3 22
2 23
12
13
1
24
terminal 1
index area
PCA8575_2 © NXP B.V. 2007. All rights reserved.
Product data sheet Rev. 02 — 21 March 2007 5 of 30
NXP Semiconductors
PCA8575
Remote 16-bit I/O expander for I
2
C-bus with interrupt
6.2 Pin description
[1] HVQFN and DHVQFN 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 2. Pin description
Symbol Pin Description
SO24, SSOP24,
TSSOP24, DHVQFN24
HVQFN24
INT 1 22 interrupt output (active LOW)
AD1 2 23 address input 1
AD2 3 24 address input 2
P00 4 1 quasi-bidirectional I/O 00
P01 5 2 quasi-bidirectional I/O 01
P02 6 3 quasi-bidirectional I/O 02
P03 7 4 quasi-bidirectional I/O 03
P04 8 5 quasi-bidirectional I/O 04
P05 9 6 quasi-bidirectional I/O 05
P06 10 7 quasi-bidirectional I/O 06
P07 11 8 quasi-bidirectional I/O 07
V
SS
12
[1]
9
[1]
supply ground
P10 13 10 quasi-bidirectional I/O 10
P11 14 11 quasi-bidirectional I/O 11
P12 15 12 quasi-bidirectional I/O 12
P13 16 13 quasi-bidirectional I/O 13
P14 17 14 quasi-bidirectional I/O 14
P15 18 15 quasi-bidirectional I/O 15
P16 19 16 quasi-bidirectional I/O 16
P17 20 17 quasi-bidirectional I/O 17
AD0 21 18 address input 0
SCL 22 19 serial clock line input
SDA 23 20 serial data line input/output
V
DD
24 21 supply voltage
PCA8575_2 © NXP B.V. 2007. All rights reserved.
Product data sheet Rev. 02 — 21 March 2007 6 of 30
NXP Semiconductors
PCA8575
Remote 16-bit I/O expander for I
2
C-bus with interrupt
7. Functional description
Refer to Figure 1 “Block diagram of PCA8575”.
7.1 Device address
Following a START condition, the bus master must send the address of the slave it is
accessing and the operation it wants to perform (read or write). The address of the
PCA8575 is shown in Figure 9. Slave address pins AD2, AD1, and AD0 choose 1 of
8 slave addresses. To conserve power, no internal pull-up resistors are incorporated on
AD2, AD1, and AD0. Address values depending on AD2, AD1, and AD0 can be found in
Table 3 “PCA8575 address map”.
Remark: The General Call address (0000 0000b) and the Device ID address
(1111 100Xb) are reserved and cannot be used as device address. Failure to follow this
requirement will cause the PCA8575 not to acknowledge.
The last bit of the first byte defines the operation to be performed. When set to logic 1 a
read is selected, while a logic 0 selects a write operation.
When AD2, AD1 and AD0 are held to V
DD
or V
SS
, the same address as the PCF8575 is
applied.
7.1.1 Address map
Fig 9. PCA8575 address
R/W
002aab636
A6 A5 A4 A3 A2 A1 A0
programmable
slave address
Table 3. PCA8575 address map
A6 A5 A4 A3 A2 A1 A0 Address (hex)
010000020h
010000121h
010001022h
010001123h
010010024h
010010125h
010011026h
010011127h
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30

PCA8575PW,112

Mfr. #:
Buy PCA8575PW,112
Manufacturer:
NXP Semiconductors
Description:
Interface - I/O Expanders 16-BIT I2C FM QB
Lifecycle:
New from this manufacturer.
Delivery:
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