PCA9545AD,112 NXP Semiconductors, PCA9545AD,112 Datasheet - Page 12

• Manufacturer Part Number: PCA9545AD,112
• Description: IC I2C SWITCH 4CH 20SOIC
• Manufacturer: NXP Semiconductors

Specifications of PCA9545AD,112

• Applications: 4-Channel I²C Switcher
• Interface: I²C
• Voltage - Supply: 2.3 V ~ 3.6 V, 4.5 V ~ 5.5 V
• Package / Case: 20-SOIC (7.5mm Width)
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 935275808112; PCA9545AD; PCA9545AD

NXP Semiconductors
PCA9545A_45B_45C_7
Product data sheet
7.5 Bus transactions
Data is transmitted to the PCA9545A/45B/45C control register using the Write mode as
shown in
Data is read from PCA9545A/45B/45C using the Read mode as shown in
Fig 14. Write control register
Fig 15. Read control register
SDA
SDA
START condition
START condition
Figure
S
S
1
1
14.
1
1
slave address
slave address
1
1
Rev. 07 — 19 June 2009
0
0
0
0
4-channel I
A1
A1
A0
A0
R/W
R/W
0
1
2
C-bus switch with interrupt logic and reset
A
A
acknowledge
from slave
acknowledge
from slave
INT3 INT2 INT1 INT0 B3
PCA9545A/45B/45C
X
X
X
control register
control register
X
B3
B2
B2
no acknowledge
B1
acknowledge
B1
© NXP B.V. 2009. All rights reserved.
from master
from slave
STOP condition
STOP condition
Figure
B0
B0
last byte
002aab172
002aab173
NA
A
15.
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P
P