PCA9538PW,112 NXP Semiconductors, PCA9538PW,112 Datasheet - Page 9

• Manufacturer Part Number: PCA9538PW,112
• Description: IC I/O EXPANDER I2C 8B 16TSSOP
• Manufacturer: NXP Semiconductors

Specifications of PCA9538PW,112

• Interface: I²C, SMBus
• Number Of I /o: 8
• Interrupt Output: Yes
• Frequency - Clock: 400kHz
• Voltage - Supply: 2.3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP
• Includes: POR
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 935277419112; PCA9538PW; PCA9538PW

NXP Semiconductors
PCA9538_5
Product data sheet
Fig 7.
Fig 8.
SDA
write to port
data out from port
data to register
Expanded diagram is shown in
Write to output port register
Write to configuration or polarity inversion registers
SCL
SDA
S
SCL
START condition
1
S
START condition
1
6.7 Bus transactions
1
2
1
1
slave address
2
3
1
1
Data is transmitted to the PCA9538 registers using the write mode as shown in
and
Figure 9
once a command byte has been sent, the register which was addressed will continue to
be accessed by reads until a new command byte has been sent.
slave address
3
4
1
0
4
Figure
5
0
0 A1 A0
5
6
0 A1 A0
and
6
7
8. Data is read from the PCA9538 registers using the read mode as shown in
R/W
Figure
7
8
Figure
0
R/W
8
9
0
A
acknowledge
from slave
8-bit I
18.
9
A
acknowledge
from slave
0
10. These devices do not implement an auto-increment function so
0
0
2
Rev. 05 — 28 May 2009
C-bus and SMBus low power I/O port with interrupt and reset
command byte
0
0
command byte
0
0
0
0
0
0
0
0
1 1/0
1
A
acknowledge
from slave
A
acknowledge
from slave
data to port
DATA 1
data to register
DATA 1
t
v(Q)
A
acknowledge
from slave
PCA9538
© NXP B.V. 2009. All rights reserved.
DATA 1 VALID
A
acknowledge
from slave
STOP
condition
P
002aae708
STOP
condition
P
002aae709
Figure 7
9 of 28