PCA9557PW,112 NXP Semiconductors, PCA9557PW,112 Datasheet - Page 12

• Manufacturer Part Number: PCA9557PW,112
• Description: IC I/O EXPANDER I2C 8B 16TSSOP
• Manufacturer: NXP Semiconductors

Specifications of PCA9557PW,112

• Package / Case: 16-TSSOP
• Interface: I²C, SMBus
• Number Of I /o: 8
• Interrupt Output: No
• Frequency - Clock: 400kHz
• Voltage - Supply: 2.3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Includes: POR
• Logic Family: PCA
• Operating Supply Voltage: 2.3 V to 5.5 V
• Power Dissipation: 200 mW
• Operating Temperature Range: - 40 C to + 85 C
• Maximum Clock Frequency: 400 KHz
• Mounting Style: SMD/SMT
• Output Current: 50 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 568-5028; 935270669112; PCA9557PW; PCA9557PW,112; PCA9557PW

NXP Semiconductors
PCA9557
Product data sheet
Fig 16. Read from register
Fig 17. Read input port register
data into
SDA
read from
(cont.)
port
Remark: 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. When this occurs, data present at the last acknowledge
phase is valid (output mode). Input data is lost.
SDA
port
S
START condition
S
(repeated)
START condition
0
S
START condition
0
0
slave address
0
0
1
slave address
0
1
slave address
1 A2 A1 A0 0
1
1 A2 A1 A0
DATA 1
1 A2 A1 A0 1
acknowledge
from slave
acknowledge
R/W
from slave
R/W
t
h(D)
1
R/W
A
A
A
acknowledge
from slave
DATA 2
at this moment master-transmitter becomes master-receiver
and slave-receiver becomes slave-transmitter
Rev. 06 — 11 June 2008
command byte
data from register
DATA (first byte)
data from port
DATA 1
DATA 3
acknowledge
from slave
t
A
su(D)
8-bit I
A
acknowledge
from master
(cont.)
A
acknowledge
from master
2
C-bus and SMBus I/O port with reset
DATA 4
data from port
data from register
DATA (last byte)
DATA 4
no acknowledge
from master
PCA9557
NA
© NXP B.V. 2008. All rights reserved.
no acknowledge
from master
NA
002aad284
P
STOP
condition
002aad283
P
STOP
condition
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