PCA9541BS/03,118 NXP Semiconductors, PCA9541BS/03,118 Datasheet - Page 22

• Manufacturer Part Number: PCA9541BS/03,118
• Description: IC I2C 2:1 SELECTOR 16-HVQFN
• Manufacturer: NXP Semiconductors

Specifications of PCA9541BS/03,118

• Package / Case: 16-VQFN Exposed Pad, 16-HVQFN, 16-SQFN, 16-DHVQFN
• Applications: 2-Channel I²C Multiplexer
• Interface: I²C
• Voltage - Supply: 2.3 V ~ 3.6 V, 4.5 V ~ 5.5 V
• Mounting Type: Surface Mount
• Logic Family: PCA
• Propagation Delay Time: 0.3 ns
• Operating Supply Voltage: 2.3 V to 3.6 V
• Power Dissipation: 400 mW
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Output Current: 25 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: 568-1848-2; 935273318118; PCA9541BS/03-T

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