PCA9538PW,112 NXP Semiconductors, PCA9538PW,112 Datasheet - Page 10

• 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 9.
Fig 10. Read input port register
data into
SDA
(cont.)
port
INT
Read from register
read from
This figure assumes the command byte has previously been programmed with 00h.
Transfer of data can be stopped at any moment by a STOP condition.
Expanded diagram is shown in
S
START condition
SDA
port
S
(repeated)
START condition
1
SCL
1
1
S
START condition
t
slave address
v(INT)
1
1
1
1
slave address
1
2
0
1
slave address
0
3
0 A1 A0
DATA 1
1
0 A1 A0 1
4
acknowledge
0
from slave
acknowledge
5
0 A1 A0 1
R/W
from slave
Figure
6
0
R/W
7
A
t
h(D)
R/W
8-bit I
A
17.
8
9
A
acknowledge
from slave
COMMAND BYTE
at this moment master-transmitter becomes master-receiver
and slave-receiver becomes slave-transmitter
2
Rev. 05 — 28 May 2009
C-bus and SMBus low power I/O port with interrupt and reset
DATA 2
data from register
t
DATA (first byte)
rst(INT)
data from port
DATA 1
acknowledge
from slave
DATA 3
t
su(D)
A
A
acknowledge
from master
(cont.)
A
acknowledge
from master
data from register
DATA (last byte)
data from port
DATA 4
DATA 4
no acknowledge
from master
PCA9538
© NXP B.V. 2009. All rights reserved.
NA
NA
no acknowledge
from master
002aae710
P
STOP
condition
P
STOP
condition
002aae711
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