PCA9518 Datasheet, PDF (3/20 Pages) NXP Semiconductors – Expandable 5-channel I2C hub

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SOIC, SSOP,
TSSOP, OR
QSOP PIN NO.
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PCA9518
EXPANDABLE FIVE-CHANNEL I²C HUB
SCPS132A – JUNE 2006 – REVISED JULY 2007
TERMINAL FUNCTIONS
NAME
EXPSCL1
EXPSCL2
SCL0
SDA0
SCL1
SDA1
EN1
SCL2
SDA2
GND
EN2
SCL3
SDA3
EN3
SCL4
SDA4
EN4
EXPSDA1
EXPSDA2
V_CC
DESCRIPTION
Expandable serial clock pin 1. Connect to V_CC through a pullup resistor.
Expandable serial clock pin 2. Connect to V_CC through a pullup resistor.
Serial clock bus 0. Connect to V_CC through a pullup resistor.
Serial data bus 0. Connect to V_CC through a pullup resistor.
Serial clock bus 1. Connect to V_CC through a pullup resistor.
Serial data bus 1. Connect to V_CC through a pullup resistor.
Active-high bus enable 1
Serial clock bus 2. Connect to V_CC through a pullup resistor.
Serial data bus 2. Connect to V_CC through a pullup resistor.
Ground
Active-high bus enable 2
Serial clock bus 3. Connect to V_CC through a pullup resistor.
Serial data bus 3. Connect to V_CC through a pullup resistor.
Active-high bus enable 3
Serial clock bus 4. Connect to V_CC through a pullup resistor.
Serial data bus 4. Connect to V_CC through a pullup resistor.
Active-high bus enable 4
Expandable serial data pin 1. Connect to V_CC through a pullup resistor.
Expandable serial data pin 2. Connect to V_CC through a pullup resistor.
Supply voltage
FUNCTION TABLE^(1)(2)(3)
INPUTS
FUNCTION
EN1 EN2 EN3 EN4 SCL1
SCL2
SCL3
SCL4
SDA1
SDA2
SDA3
SDA4
L
L
L
L Disconnect Disconnect Disconnect Disconnect Disconnect Disconnect Disconnect Disconnect
L
L
L
H Disconnect Disconnect Disconnect
SCL0
Disconnect Disconnect Disconnect
SDA0
L L H L Disconnect Disconnect SCL0 Disconnect Disconnect Disconnect SDA0 Disconnect
L L H H Disconnect Disconnect SCL0
SCL0 Disconnect Disconnect SDA0
SDA0
L
H
L
L Disconnect
SCL0
Disconnect Disconnect Disconnect
SDA0
Disconnect Disconnect
L
H
L
H Disconnect
SCL0
Disconnect
SCL0
Disconnect
SDA0
Disconnect
SDA0
L
HH
L Disconnect
SCL0
SCL0 Disconnect Disconnect SDA0
SDA0 Disconnect
L
H H H Disconnect
SCL0
SCL0
SCL0 Disconnect SDA0
SDA0
SDA0
H
L
L
L
SCL0 Disconnect Disconnect Disconnect SDA0 Disconnect Disconnect Disconnect
H
L
L
H
SCL0 Disconnect Disconnect SCL0
SDA0 Disconnect Disconnect SDA0
HLHL
SCL0 Disconnect SCL0 Disconnect SDA0 Disconnect SDA0 Disconnect
H L HH
SCL0 Disconnect SCL0
SCL0
SDA0 Disconnect SDA0
SDA0
H
H
L
L
SCL0
SCL0 Disconnect Disconnect SDA0
SDA0 Disconnect Disconnect
HH L H
SCL0
SCL0 Disconnect SCL0
SDA0
SDA0 Disconnect SDA0
HHH L
SCL0
SCL0
SCL0 Disconnect SDA0
SDA0
SDA0 Disconnect
HHHH
SCL0
SCL0
SCL0
SCL0
SDA0
SDA0
SDA0
SDA0
(1) SCL from master = SCL0
(2) SDA from master = SDA0
(3) See Description and Application Information for information on EXPxxx1 and EXPxxx2 behavior.
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