PCA9541AD/01,112 NXP Semiconductors, PCA9541AD/01,112 Datasheet - Page 22

• Manufacturer Part Number: PCA9541AD/01,112
• Description: IC I2C 2:1 SELECTOR 16-SOIC
• Manufacturer: NXP Semiconductors

Specifications of PCA9541AD/01,112

• Package / Case: 16-SOIC (3.9mm Width)
• Applications: 2-Channel I²C Multiplexer
• Interface: I²C, SMBus
• Voltage - Supply: 2.3 V ~ 5.5 V
• Mounting Type: Surface Mount
• Maximum Operating Frequency: 400 KHz
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.3 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 568-4940-5; 935289363112

Fig 15. Write to the Control register and switch from Channel 1 to Channel 0 (bus recovery/initialization requested)
(1) We assume that a read of the Control register was done by MASTER 0 before this sequence and that 000x 0101 was read (MASTER 1 controlling the bus).
SDA_MST0
SCL_MST0
INT1
SCL_SLAVE
SDA_SLAVE
INT0
S
START condition
1 1 1 A3 A2 A1 A0 0
slave address
(1)
acknowledge
from slave
R/W
A
MASTER 1 has control of the bus
0 0 0 AI 0 0 0 1
command code register
increment
auto
acknowledge
from slave
A
0 0 0 1 0 1 0 0
if the interrupt is not masked
data Control register
BUSINIT
(BUSLOSTMSK = 0)
BUSON
acknowledge
MYBUS
from slave
(between STOP and START) defined in the I
A
before sending commands to the downstream devices.
P
STOP
condition
MASTER 0 must wait for the 'bus free time' value
After the STOP condition
MASTER 1 is disconnected
from the downstream channel.
1 2 3 4 5 6 7 8 9
PCA9541 has control of the bus
if the interrupt is not masked
(BUSINITMSK = 0)
2
C-bus specification
STOP command
A
MASTER 0
has control
of the bus
002aab609