PCA9555PW NXP Semiconductors, PCA9555PW Datasheet - Page 10

• Manufacturer Part Number: PCA9555PW
• Description: IC, I2C-BUS AND SMBUS I/O PORT, TSSOP24
• Manufacturer: NXP Semiconductors

Specifications of PCA9555PW

• Chip Configuration: 16 Bit
• Bus Frequency: 400kHz
• Ic Interface Type: I2C
• No. Of I/o's: 16
• Supply Voltage Range: 2.3V To 5.5V
• Digital Ic Case Style: TSSOP
• No. Of Pins: 24
• Termination Type: SMD
• Filter Terminals: SMD
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Fig 10. Write to Output port registers
Fig 11. Write to Configuration registers
write to port
from port 0
from port 1
data out
data out
SDA
SCL
SDA
SCL
S
START condition
1
S
START condition
0
1
2
0
1
slave address
2
3
1
0
slave address
3
4
0
0 A2 A1 A0 0
4
5
0 A2 A1 A0 0
5
6
6
7
R/W
7
8
R/W
8
9
A
acknowledge
from slave
9
A
acknowledge
from slave
0
0
0
command byte
0
0
command byte
0
0
0
0
0
1
0
1
1
0
0
A
acknowledge
from slave
MSB
A
acknowledge
from slave
0.7
data to register
DATA 0
data to port 0
DATA 0
t
LSB
v(Q)
0.0
A
acknowledge
from slave
MSB
A
acknowledge
from slave
1.7
data to register
DATA 1
data to port 1
DATA 1
DATA VALID
t
LSB
v(Q)
1.0
A
002aac221
condition
STOP
A
002aac220
P
condition
STOP
P