Datasheet

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PCA9518
EXPANDABLE FIVE-CHANNEL I
2
C HUB
SCPS132A – JUNE 2006 – REVISED JULY 2007
TERMINAL FUNCTIONS
SOIC, SSOP,
TSSOP, OR NAME DESCRIPTION
QSOP PIN NO.
1 EXPSCL1 Expandable serial clock pin 1. Connect to V
CC
through a pullup resistor.
2 EXPSCL2 Expandable serial clock pin 2. Connect to V
CC
through a pullup resistor.
3 SCL0 Serial clock bus 0. Connect to V
CC
through a pullup resistor.
4 SDA0 Serial data bus 0. Connect to V
CC
through a pullup resistor.
5 SCL1 Serial clock bus 1. Connect to V
CC
through a pullup resistor.
6 SDA1 Serial data bus 1. Connect to V
CC
through a pullup resistor.
7 EN1 Active-high bus enable 1
8 SCL2 Serial clock bus 2. Connect to V
CC
through a pullup resistor.
9 SDA2 Serial data bus 2. Connect to V
CC
through a pullup resistor.
10 GND Ground
11 EN2 Active-high bus enable 2
12 SCL3 Serial clock bus 3. Connect to V
CC
through a pullup resistor.
13 SDA3 Serial data bus 3. Connect to V
CC
through a pullup resistor.
14 EN3 Active-high bus enable 3
15 SCL4 Serial clock bus 4. Connect to V
CC
through a pullup resistor.
16 SDA4 Serial data bus 4. Connect to V
CC
through a pullup resistor.
17 EN4 Active-high bus enable 4
18 EXPSDA1 Expandable serial data pin 1. Connect to V
CC
through a pullup resistor.
19 EXPSDA2 Expandable serial data pin 2. Connect to V
CC
through a pullup resistor.
20 V
CC
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 H H 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
H L H L SCL0 Disconnect SCL0 Disconnect SDA0 Disconnect SDA0 Disconnect
H L H H SCL0 Disconnect SCL0 SCL0 SDA0 Disconnect SDA0 SDA0
H H L L SCL0 SCL0 Disconnect Disconnect SDA0 SDA0 Disconnect Disconnect
H H L H SCL0 SCL0 Disconnect SCL0 SDA0 SDA0 Disconnect SDA0
H H H L SCL0 SCL0 SCL0 Disconnect SDA0 SDA0 SDA0 Disconnect
H H H H 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.
3
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