INTEGRATED CIRCUITS
PCA9516
5-channel I2C hub
Product data sheet
Supersedes data of 2004 Sep 29
Philips
Semiconductors
2006 Sep 22
Philips Semiconductors
Product data sheet
5-channel I2C hub
PCA9516
DESCRIPTION
The PCA9516 is a BiCMOS integrated circuit intended for
application in I2C and SMBus systems.
While retaining all the operating modes and features of the I2C
system, it permits extension of the I2C-bus by buffering both the data
(SDA) and the clock (SCL) lines, thus enabling five buses of 400 pF.
The I2C-bus capacitance limit of 400 pF restricts the number of
devices and bus length. Using the PCA9516 enables the system
designer to divide the bus into five segments off of a hub where any
segment to segment transition sees only one repeater delay.
FEATURES
• 5 channel, bi-directional buffer
• I2C-bus and SMBus compatible
• Active HIGH individual repeater enable input
• Open-drain input/outputs
• Lock-up free operation
• Supports arbitration and clock stretching across the repeater
• Accommodates standard mode and fast mode I2C devices and
It can also be used to run different buses at 5 V and 3.3 V or
400 kHz and 100 kHz buses where the 100 kHz bus is isolated
when 400 kHz operation of the other bus is required.
Two or more PCA9516s cannot be put in series. The PCA9516
design does not allow this configuration. 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 each
repeater in the hub. A “regular LOW” applied at the input of a
PCA9516 will be propagated as a “buffered LOW” with a slightly
higher value on all the enabled outputs. When this “buffered LOW” is
applied to another PCA9515, PCA9516, or PCA9518 in series, the
second PCA9515, PCA9516, or PCA9518 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, PCA9516, or PCA9518 but can be used in
series with themselves since they use shifting instead of static
offsets to avoid lock-up conditions.
multiple masters
• Powered-off high impedance I2C pins
• Operating supply voltage range of 3.0 V to 3.6 V
• 5.5 V tolerant I2C and enable pins
• 0 to 400 kHz clock frequency1
• ESD protection exceeds 2000 V HBM per JESD22-A114,
150 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
ORDERING INFORMATION
TEMPERATURE RANGE
ORDER CODE
TOPSIDE MARK
DRAWING NUMBER
16-pin plastic SO
DESCRIPTION
–40 °C to +85 °C
PCA9516D
PCA9516D
SOT109-1
16-pin plastic TSSOP
–40 °C to +85 °C
PCA9516PW
PCA9516
SOT403-1
Standard packing quantities and other packaging data is available at www.standardics.philips.com/packaging.
1.
The maximum system operating frequency may be less than 400 kHz because of the delays added by the repeater.
2006 Sep 22
2
Philips Semiconductors
Product data sheet
5-channel I2C hub
PCA9516
PIN CONFIGURATION
PIN DESCRIPTION
PIN
SCL0
1
16
VCC
SDA0
2
15
EN4
SCL1
3
14
SDA1
4
EN1
5
SCL2
6
SDA2
GND
SYMBOL
FUNCTION
1
SCL0
Serial clock bus 0
SDA4
2
SDA0
Serial data bus 0
13
SCL4
3
SCL1
Serial clock bus 1
12
EN3
4
SDA1
Serial data bus 1
11
SDA3
5
EN1
Active-HIGH Bus 1 enable Input
7
10
SCL3
6
SCL2
Serial clock bus 2
8
9
EN2
7
SDA2
Serial data bus 2
8
GND
Supply ground
9
EN2
Active-HIGH Bus 2 enable Input
10
SCL3
Serial clock bus 3
11
SDA3
Serial data bus 3
12
EN3
Active-HIGH Bus 3 enable Input
13
SCL4
Serial clock bus 4
14
SDA4
Serial data bus 4
15
EN4
Active-HIGH Bus 4 enable Input
16
VCC
Supply power
SU01395
Figure 1. Pin configuration
2006 Sep 22
3
Philips Semiconductors
Product data sheet
5-channel I2C hub
PCA9516
BLOCK DIAGRAM
VCC
PCA9516
Buffer
SCL0
Buffer
SCL1
SCL2
Buffer
SDA0
Buffer
SDA1
Buffer
SDA2
Buffer
Buffer
SCL4
Buffer
SCL3
Buffer
SDA4
Buffer
SDA3
Hub
Logic
Hub
Logic
EN1
EN4
EN2
EN3
SU01396
GND
Figure 2. Block Diagram: PCA9516
A more detailed view of Figure 2 buffer is shown in Figure 3.
To output
Data
z
In
Inc
Enable
SW00712
Figure 3.
The output pull-down of each internal buffer is set for approximately
0.5 V, while the input threshold of each internal buffer is set about
0.07 V lower, when the output is internally driven LOW. This
prevents a lock-up condition from occurring.
2006 Sep 22
4
Philips Semiconductors
Product data sheet
5-channel I2C hub
PCA9516
resistors. The primary bus master is normally connected to
SDA0/SCL0. If the SDA0/SCL0 port is not used, the pins need to be
pulled to VCC through appropriately sized resistors.
FUNCTIONAL DESCRIPTION
The PCA9516 BiCMOS integrated circuit is a five way hub repeater,
which enables I2C and similar bus systems to be expanded with
only one repeater delay and no functional degradation of system
performance.
The PCA9516 is 5 V tolerant so it does not require any additional
circuitry to translate between the different bus voltages.
The PCA9516 BiCMOS integrated circuit contains five bi-directional,
open drain buffers specifically designed to support the standard
low-level-contention arbitration of the I2C-bus. Except during
arbitration or clock stretching, the PCA9516 acts like five pairs of
non-inverting, open drain buffers, one for SDA and one for SCL.
When one side of the PCA9516 is pulled LOW by a device on the
I2C-bus, a CMOS hysteresis type input detects the falling edge and
causes an internal driver on the other side to turn on, thus causing
the other side to also go LOW. The side driven LOW by the
PCA9516 will typically be at VOL = 0.5 V.
Enable
3.3 V
The enable pins EN1 through EN4 are active HIGH and have
internal pull-up resistors. Each enable pin ENn controls its
associated SDAn and SCLn ports. When LOW, the ENn pin blocks
the inputs from SDAn and SCLn as well as disabling the output
drivers on the SDAn and SCLn pins. The enable pins should only
change state when both the global bus and the local port are in an
idle state to prevent system failures.
SDA
5V
SDA0
SDA1
SDA
SCL0
SCL1
SCL
SLAVE 1
SCL
The active HIGH enable pins allow the use of open drain drivers
which can be wire-ORed to create a distributed enable where either
centralized control signal (master) or spoke signal (submaster) can
enable the channel when it is idle.
BUS
MASTER
400 kHz
3.3 V
EN1
EN2
EN3
I2C Systems
EN4
As with the standard I2C system, pull-up resistors are required to
provide the logic HIGH levels on the Buffered bus. (Standard
open-collector configuration of the I2C-bus). The size of these
pull-up resistors depends on the system, but each side of the
repeater must have a pull-up resistor. This part designed to work
with standard mode and fast mode I2C devices in addition to SMBus
devices. Standard mode I2C devices only specify 3 mA output drive,
this limits the termination current to 3 mA in a generic I2C system
where standard mode devices and multiple masters are possible.
Under certain conditions higher termination currents can be used.
Please see Application Note AN255 “I 2C & SMBus Repeaters, Hubs
and Expanders” for additional information on sizing resistors and
precautions when using more than one PCA9515/PCA9516 in a
system or using the PCA9515/16 in conjunction with the P82B96.
400 kHz
SDA2
SDA
SCL2
SCL
SLAVE 2
400 kHz
5V
PCA9516
SDA3
SDA
SCL3
SCL
SLAVE 3
100 kHz
3.3 V or 5 V
APPLICATION INFORMATION
A typical application is shown in Figure 4. In this example, the
system master is running on a 3.3 V I2C-bus while the slave is
connected to a 5 V bus. All buses run at 100 kHz unless slave 3 is
isolated and then the master bus and slaves 1 and 2 can run at
400 kHz.
SDA4
SCL4
Any segment of the hub can talk to any other segment of the hub.
Bus masters and slaves can be located on all five segments with
400 pF load allowed on each segment.
SW00923
Figure 4. Typical application
Unused ports should be isolated by holding the enable pin to GND
and/or pulling SDA/SCL pins to VCC through appropriately sized
2006 Sep 22
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Philips Semiconductors
Product data sheet
5-channel I2C hub
PCA9516
On the Bus 1 side of the PCA9516, the clock and data lines would
have a positive offset from ground equal to the VOL of the PCA9516.
After the 8th clock pulse, the data line will be pulled to the VOL of the
slave device that is very close to ground in our example.
In order to illustrate what would be seen in a typical application,
refer to Figures 5 and 6. If the bus master in Figure 4 were to write
to the slave through the PCA9516, we would see the waveform
shown in Figure 5 on Bus 0. This looks like a normal I2C
transmission until the falling edge of the 8th clock pulse. At that
point, the master releases the data line (SDA) while the slave pulls it
LOW through the PCA9516. Because the VOL of the PCA9516 is
typically around 0.5 V, a step in the SDA will be seen. After the
master has transmitted the 9th clock pulse, the slave releases the
data line.
It is important to note that any arbitration or clock stretching events
on Bus 1 require that the VOL of the devices on Bus 1 be 70 mV
below the VOL of the PCA9516 (see VOL – Vilc in the DC
Characteristics section) to be recognized by the PCA9516 and then
transmitted to Bus 0.
2 V/DIV
9th CLOCK PULSE
VOL OF PCA9516
VOL OF MASTER
SW00965
Figure 5. Bus 0 waveform
2 V/DIV
9th CLOCK PULSE
VOL OF PCA9516
VOL OF SLAVE
SW00966
Figure 6. Bus 1 waveform
2006 Sep 22
6
Philips Semiconductors
Product data sheet
5-channel I2C hub
PCA9516
ABSOLUTE MAXIMUM RATINGS
Limiting values in accordance with the Absolute Maximum System (IEC 134).
Voltages with respect to pin GND.
LIMITS
SYMBOL
PARAMETER
MIN.
MAX.
UNIT
V
VCC to GND
Supply voltage range VCC
–0.5
+7
Vbus
Voltage range I2C-bus, SCL or SDA
–0.5
+7
V
I
DC current (any pin)
—
50
mA
Ptot
Power dissipation
—
300
mW
Tstg
Storage temperature range
–55
+125
°C
Tamb
Operating ambient temperature range
–40
+85
°C
DC ELECTRICAL CHARACTERISTICS
VDD = 3.0 to 3.6 V; GND = 0 V; Tamb = –40 °C to +85 °C; unless otherwise specified.
SYMBOL
PARAMETER
TEST CONDITIONS
LIMITS
MIN.
TYP.
MAX.
UNIT
Supplies
VCC
DC supply voltage
3.0
3.3
3.6
V
ICCH
Quiescent supply current,
both channels HIGH
VCC = 3.6 V;
SDAn = SCLn = VCC
—
7
10
mA
ICCL
Quiescent supply current,
both channels LOW
VCC = 3.6 V;
one SDA and one SCL = GND,
other SDA and SCL open
—
6.8
10
mA
ICCLc
Quiescent supply current in contention
VCC = 3.6 V;
SDAn = SCLn = GND
—
7
10
mA
Input SCL; input/output SDA
VIH
HIGH-level input voltage
0.7 VCC
—
5.5
V
VIL
LOW-level input voltage (Note 1)
–0.5
—
0.3 VCC
V
VILc
LOW-level input voltage contention
(Note 1)
–0.5
—
0.4
V
VIK
Input clamp voltage
II = –18 mA
—
—
–1.2
V
II
Input leakage current
VI = 3.6 V
—
—
±1
µA
IIL
Input current LOW, SDA, SCL
VI = 0.2 V, SDA, SCL
µA
LOW-level output voltage
IOL = 0 or 6 mA
LOW-level input voltage below
output LOW-level voltage
IOH
CI
VOL
VOL–VILc
—
—
5
0.47
0.52
0.6
V
Guaranteed by design
—
—
70
mV
Output HIGH-level leakage current
VO = 3.6 V
—
—
10
µA
Input capacitance
VI = 3 V or 0 V
—
6
10
pF
V
Enable 1–4
VIL
LOW-level input voltage
–0.5
—
0.8
VIH
HIGH-level input voltage
2.0
—
5.5
V
—
10
30
µA
–1
—
1
µA
—
6
7
pF
IIL
Input current LOW, EN1–EN4
ILI
Input leakage current
CI
Input capacitance
VI = 0.2 V, EN1–EN4
VI = 3.0 V or 0 V
NOTE:
1. VIL specification is for the first LOW level seen by the SDAx/SCLx lines. VILc is for the second and subsequent LOW levels seen by the
SDAx/SCLx lines.
2006 Sep 22
7
Philips Semiconductors
Product data sheet
5-channel I2C hub
PCA9516
AC ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
LIMITS
TEST CONDITIONS
MIN.
TYP.
MAX.
UNIT
tPHL
Propagation delay
Waveform 1
57
115
170
ns
tPLH
Propagation delay
Waveform 1
33
55
78
ns
tTHL
Transition time
Waveform 1
67
ns
tTLH
Transition time
Waveform 1; Note 1
135
ns
tSET
Enable to Start condition
100
ns
tHOLD
Enable after Stop condition
100
ns
NOTE:
1. The tTLH transition time is guaranteed with loads of 1.35 kΩ pull-up resistance and 7 pF load capacitance, plus an additional 50 pF load
capacitance. Different load resistance and capacitance will alter the RC time constant, thereby changing the propagation delay and
transition times.
AC WAVEFORMS
TEST CIRCUIT
VCC
3.3 V
INPUT
1.5 V
1.5 V
0.1 V
tPHL
VIN
D.U.T.
3.3 V
80%
RT
80%
1.5 V
20%
RL
VOUT
PULSE
GENERATOR
tPLH
OUTPUT
VCC
CL
1.5 V
20%
VOL
tTHL
tTLH
Test Circuit for Open Drain Outputs
DEFINITIONS
SW00646
RL = Load resistor; 1.35 kΩ
Waveform 1.
CL = Load capacitance includes jig and probe capacitance;
7 pF
RT = Termination resistance should be equal to ZOUT of
pulse generators.
SW00792
Figure 7. Test circuit
2006 Sep 22
8
Philips Semiconductors
Product data sheet
5-channel I2C hub
PCA9516
SO16: plastic small outline package; 16 leads; body width 3.9 mm
2006 Sep 22
9
SOT109-1
Philips Semiconductors
Product data sheet
5-channel I2C hub
PCA9516
TSSOP16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm
2006 Sep 22
10
SOT403-1
Philips Semiconductors
Product data sheet
5-channel I2C hub
PCA9516
REVISION HISTORY
Rev
Date
Description
_7
20060922
Product data sheet. Supersedes data of 2004 Sep 29 (9397 750 14107).
Modifications:
• FEATURES section on page 2, 12th bullet: changed “200 V MM ...” to “150 V MM ...”
_6
20040929
Product data sheet (9397 750 14107). Supersedes data of 2004 Jun 24 (9397 750 12917).
_5
20040624
Product data (9397 750 12917). Supersedes data of 2003 November 10 (9397 750 12291).
_4
20031110
Product data (9397 750 12291); ECN 853-2234 30410 dated 03 October 2003.
Supersedes data of 2002 May 13 (9397 750 09814).
_3
20020513
Product data (9397 750 09815); ECN: 853–2234 28185 (2002 May 13)
2006 Sep 22
11
Philips Semiconductors
Product data sheet
5-channel I2C hub
PCA9516
Legal Information
Data sheet status
Document status [1][2]
Product status [3]
Definition
Objective [short] data sheet
Development
This document contains data from the objective specification for product development.
Preliminary [short] data sheet
Qualification
This document contains data from the preliminary specification.
Product [short] data sheet
Production
This document contains the product specification.
[1] Please consult the most recently issued document before initiating or completing a design.
[2] The term ‘short data sheet’ is explained in section “Definitions”.
[3] The product status of device(s) described in this document may have changed since this data sheet was published and may differ in case of multiple devices. The latest product status
information is available on the Internet at URL http://www.semiconductors.philips.com.
inclusion and/or use of Philips Semiconductors products in such equipment
or applications and therefore such inclusion and/or use is at the customer’s
own risk.
Definitions
Draft — The document is a draft version only. The content is still under
internal review and subject to formal approval, which may result in
modifications or additions. Philips Semiconductors does not give any
representations or warranties as to the accuracy or completeness of
information included herein and shall have no liability for the consequences
of use of such information.
Applications — Applications that are described herein for any of these
products are for illustrative purposes only. Philips Semiconductors makes no
representation or warranty that such applications will be suitable for the
specified use without further testing or modification.
Short data sheet — A short data sheet is an extract from a full data sheet
with the same product type number(s) and title. A short data sheet is
intended for quick reference only and should not be relied upon to contain
detailed and full information. For detailed and full information see the
relevant full data sheet, which is available on request via the local Philips
Semiconductors sales office. In case of any inconsistency or conflict with the
short data sheet, the full data sheet shall prevail.
Limiting values — Stress above one or more limiting values (as defined in
the Absolute Maximum Ratings System of IEC 60134) may cause
permanent damage to the device. Limiting values are stress ratings only and
operation of the device at these or any other conditions above those given in
the Characteristics sections of this document is not implied. Exposure to
limiting values for extended periods may affect device reliability.
Terms and conditions of sale — Philips Semiconductors products are
sold subject to the general terms and conditions of commercial sale, as
published at http://www.semiconductors.philips.com/profile/terms,
including those pertaining to warranty, intellectual property rights
infringement and limitation of liability, unless explicitly otherwise agreed to in
writing by Philips Semiconductors. In case of any inconsistency or conflict
between information in this document and such terms and conditions, the
latter will prevail.
Disclaimers
General — Information in this document is believed to be accurate and
reliable. However, Philips Semiconductors does not give any representations
or warranties, expressed or implied, as to the accuracy or completeness of
such information and shall have no liability for the consequences of use of
such information.
Right to make changes — Philips Semiconductors reserves the right to
make changes to information published in this document, including without
limitation specifications and product descriptions, at any time and without
notice. This document supersedes and replaces all information supplied prior
to the publication hereof.
No offer to sell or license — Nothing in this document may be interpreted
or construed as an offer to sell products that is open for acceptance or the
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Trademarks
Suitability for use — Philips Semiconductors products are not designed,
authorized or warranted to be suitable for use in medical, military, aircraft,
space or life support equipment, nor in applications where failure or
malfunction of a Philips Semiconductors product can reasonably be
expected to result in personal injury, death or severe property or
environmental damage. Philips Semiconductors accepts no liability for
Notice: All referenced brands, product names, service names and
trademarks are the property of their respective owners.
I2C-bus — logo is a trademark of Koninklijke Philips Electronics N.V.
Contact information
For additional information please visit: http://www.semiconductors.philips.com
For sales office addresses, send an e-mail to: sales.addresses@www.semiconductors.philips.com.
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
Koninklijke Philips Electronics N.V. 2006.
All rights reserved.
For more information, please visit http://www.semiconductors.philips.com.
For sales office addresses, email to: sales.addresses@www.semiconductors.philips.com.
Date of release: 20060922
Document identifier: PCA9516_7
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