PCA9541PW/01,112 NXP Semiconductors, PCA9541PW/01,112 Datasheet - Page 27

• Manufacturer Part Number: PCA9541PW/01,112
• Description: IC I2C 2:1 SELECTOR 16-TSSOP
• Manufacturer: NXP Semiconductors

Specifications of PCA9541PW/01,112

• Applications: 2-Channel I²C Multiplexer
• Interface: I²C, SMBus
• Voltage - Supply: 2.3 V ~ 5.5 V
• Package / Case: 16-TSSOP
• Mounting Type: Surface Mount
• For Use With: 568-3615 - DEMO BOARD I2C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 568-1043-5; 935273297112; PCA9541PW/01

NXP Semiconductors
PCA9541_7
Product data sheet
10.5 Bus initialization/recovery to initialize slaves without hardware reset
If the I
and Slave 2 in
PCA9541/03 disconnects the bus when it is reset via the hardware reset line, restoring the
master's control of the rest of the bus (for example, Slave 0). The bus master can then
command the PCA9541/03 to send 9 clock pulses/STOP condition to reset the
downstream I
downstream devices isolated.
Fig 21. Gatekeeper multiplexer application
Fig 22. Bus initialization/recovery application
2
C-bus is hung, I
MASTER
2
A
Z
C-bus devices before they are reconnected to the master or leave the
Figure
22) can be isolated from the master by the PCA9541/03. The
SLAVE 0
2
C-bus devices without a hardware reset pin (for example, Slave 1
B
Z
Rev. 07 — 2 July 2009
SDA/SCL
2-to-1 I
2
C-bus master selector with interrupt logic and reset
C
Z
PCA9541/03
RESET
D
Z
SDA
SCL
E
Z
SLAVE 1
SLAVE 2
F
Z
PCA9541
slave I
© NXP B.V. 2009. All rights reserved.
002aab616
G
Z
2
C-bus
002aab615
27 of 41
H
Z