pca9518d NXP Semiconductors, pca9518d Datasheet - Page 2

• Manufacturer Part Number: pca9518d
• Description: Expandable 5-channel I2c Hub
• Manufacturer: NXP Semiconductors

Philips Semiconductors
DESCRIPTION
The PCA9518 is a BiCMOS integrated circuit intended for
application in I
While retaining all the operating modes and features of the I
system, it permits extension of the I
data (SDA) and the clock (SCL) lines, thus enabling virtually
unlimited buses of 400 pF.
The I
devices and bus length. Using the PCA9518 enables the system
designer to divide the bus into an unlimited number of segments off
of a hub where any segment to segment transition sees only one
repeater delay and is multiple master capable on each segment.
Using multiple PCA9518 parts, any width hub (in multiples of five)
can be implemented using the expansion pins.
A PCA9518 cluster cannot be put in series with a PCA9515/16
or with another PCA9518 cluster. Multiple PCA9518 devices can
be grouped with other PCA9518 devices into any size cluster thanks
to the EXPxxxx pins that allow the I2C signals to be sent/received
from/to one PCA9518 to/from another PCA9518 within the cluster.
Since there is no direction pin, slightly different “legal” low voltage
levels are used to avoid lock up conditions between the input and
the output of individual repeaters in the cluster. A “regular low”
applied at the input of any of the PCA9518 devices will then be
propagated as a “buffered low” with a slightly higher value to all
enabled outputs in the PCA9518 cluster. When this “buffered low” is
applied to a PCA9515 and PCA9516 or separate PCA9518 cluster
(not connected via the EXPxxx pins) in series, the second PCA9515
and PCA9516 or PCA9518 cluster will not recognize it as a “regular
low” and will not propagate it as a “buffered low ” again. The
PCA9510/9511/9513/9514 and PCA9512 cannot be used in series
with the PCA9515 and PCA9516 or PCA9518 but can be used in
series with themselves since they use shifting instead of static
offsets to avoid lock up conditions.
FEATURES
ORDERING INFORMATION
Standard packing quantities and other packaging data is available at www.standardproducts.philips.com/packaging.
1.
2.
2004 Sep 29
Expandable 5 channel, bi-directional buffer
I
Active-HIGH individual repeater enable inputs
Open-drain input/outputs
Lock-up free operation
Supports arbitration and clock stretching across the repeater
Accommodates standard mode and fast mode I
multiple masters
Powered-off high-impedance I
Operating supply voltage range of 3.0 V to 3.6 V
5 V tolerant I
0 kHz to 400 kHz clock frequency
ESD protection exceeds 2000 V HBM per JESD22-A114,
200 V MM per JESD22-A115, and 1000 V CDM per
JESD22-C101.
Latch-up testing is done to JEDEC Standard JESD78 which
exceeds 100 mA.
Package offerings: SO and TSSOP
Expandable 5-channel I
20-pin plastic SO
20-pin plastic TSSOP
2
C-bus and SMBus compatible
2
Only four ports per device are available if individual Enable is required.
The maximum system operating frequency may be less than 400 kHz because of the delays added by the repeater.
C-bus capacitance limit of 400 pF restricts the number of
PACKAGES
2
2
C and SMBus systems.
C and enable pins
TEMPERATURE RANGE
2
C pins
–40 C to +85 C
–40 C to +85 C
2
2
C-bus by buffering both the
2
C hub
2
C devices and
2
C
ORDER CODE
PCA9518PW
1
PCA9518D
2
PIN CONFIGURATION
PIN DESCRIPTION
PIN
10
12
13
14
15
16
17
18
19
20
11
1
2
3
4
5
6
7
8
9
EXPSCL1
EXPSCL2
SCL0
SDA0
SCL1
SDA1
EN1
SCL2
SDA2
GND
EN2
SCL3
SDA3
EN3
SCL4
SDA4
EN4
EXPSDA1
EXPSDA2
V
CC
SYMBOL
EXPSCL2
EXPSCL1
TOPSIDE MARK
SDA0
SDA1
SDA2
SCL0
SCL1
SCL2
PCA9518D
GND
PCA9518
EN1
Figure 1. Pin configuration
10
1
2
3
4
5
6
7
8
9
Expandable serial clock pin 1
Expandable serial clock pin 2
Serial clock bus 0
Serial data bus 0
Serial clock bus 1
Serial data bus 1
Active-HIGH Bus 1 enable Input
Serial clock bus 2
Serial data bus 2
Supply ground
Active-HIGH Bus 2 enable Input
Serial clock bus 3
Serial data bus 3
Active-HIGH Bus 3 enable Input
Serial clock bus 4
Serial data bus 4
Active-HIGH Bus 4 enable Input
Expandable serial data pin 1
Expandable serial data pin 2
Supply power
20
19
18
17
16
15
14
13
12
11
FUNCTION
DRAWING NUMBER
V
EN4
SDA4
SCL4
EN3
SDA3
SCL3
EN2
EXPSDA2
EXPSDA1
CC
SOT163-1
SOT360-1
Product data sheet
PCA9518
SU01595