Philips Semiconductors

Product data

PCA9516

5-channel I

C hub

2002 May 13

8532234 28185

DESCRIPTION

The PCA9516 is a BiCMOS integrated circuit intended for
application in I

C and SMBus systems.

While retaining all the operating modes and features of the I

system, it permits extension of the I

C bus by buffering both the data

(SDA) and the clock (SCL) lines, thus enabling five buses of 400 pF.

The I

C 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.

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.

FEATURES

5 channel, bi-directional buffer

C-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 I

C devices and

multiple masters

Powered-off high impedance I

C pins

Operating supply voltage range of 3.0 V to 3.6 V

5 V tolerant I

C and enable pins

0 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

PIN CONFIGURATION

SCL0

SDA1

SCL1

EN4

SDA4

SCL4

VCC

SDA0

SU01395

EN1

GND

SDA2

SDA3

SCL3

EN2

EN3

SCL2

Figure 1. Pin configuration

PIN DESCRIPTION

PIN

SYMBOL

FUNCTION

SCL0

Serial clock bus 0

SDA0

Serial data bus 0

SCL1

Serial clock bus 1

SDA1

Serial data bus 1

EN1

Active High Bus 1 enable Input

SCL2

Serial clock bus 2

SDA2

Serial data bus 2

GND

Supply ground

EN2

Active High Bus 2 enable Input

SCL3

Serial clock bus 3

SDA3

Serial data bus 3

EN3

Active High Bus 3 enable Input

SCL4

Serial clock bus 4

SDA4

Serial data bus 4

EN4

Active High Bus 4 enable Input

Supply power

ORDERING INFORMATION

DESCRIPTION

TEMPERATURE RANGE

ORDER CODE

DRAWING NUMBER

16-pin plastic SO (narrow)

40 to +85

PCA9516D

SOT109-1

16-pin plastic TSSOP

40 to +85

PCA9516PW

SOT403-1

Standard packing quantities and other packaging data is available at www.philipslogic.com/packaging.

The maximum system operating frequency may be less than 400 KHz because of the delays added by the repeater.

Philips Semiconductors

Product data

PCA9516

5-channel I

C hub

2002 May 13

FUNCTIONAL DESCRIPTION

The PCA9516 BiCMOS integrated circuit is a five way hub repeater,
which enables I

C and similar bus systems to be expanded with

only one repeater delay and no functional degradation of system
performance.

The PCA9516 BiCMOS integrated circuit contains five bi-directional,
open drain buffers specifically designed to support the standard
low-level-contention arbitration of the I

C-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.

Enable

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.

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.

C Systems

As with the standard I

C system, pull-up resistors are required to

provide the logic HIGH levels on the Buffered bus. (Standard
open-collector configuration of the I

C-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 I

C devices in addition to SMBus

devices. Standard mode I

C devices only specify 3 mA output drive,

this limits the termination current to 3 mA in a generic I

C system

where standard mode devices and multiple masters are possible.
Under certain conditions higher termination currents can be used.
Please see Application Note AN255

C & 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.

APPLICATION INFORMATION

A typical application is shown in Figure 4. In this example, the
system master is running on a 3.3 V I

C-bus while the slave is

connected to a 5 V bus. All buses run at 100 kHz unless slave 3 and
4 are isolated and then the master bus and slave 1 and 2 can run at
400 kHz.

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.

The PCA9516 is 5 V tolerant so it does not require any additional
circuitry to translate between the different bus voltages.

When one side of the PCA9516 is pulled low by a device on the
I

C-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 V

= 0.5 V.

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 I

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 V

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.

SW00923

BUS
MASTER

SLAVE 1

PCA9516

SDA

SDA0

SDA

SCL

SCL0

SCL

EN1

3.3 V

5 V

SDA1

SCL1

EN2

EN3

EN4

SLAVE 2

SDA

SCL

3.3 V

SDA2

SCL2

SLAVE 3

SDA

SCL

5 V

SDA3

SCL3

SLAVE 4

SDA

SCL

5 V

SDA4

SCL4

400 kHz

100 kHz

Figure 4. Typical application

Philips Semiconductors

Product data

PCA9516

5-channel I

C hub

2002 May 13

9th CLOCK PULSE

OF MASTER

OF PCA9516

2 V/DIV

SW00965

Figure 5. Bus 0 waveform

On the Bus 1 side of the PCA9516, the clock and data lines would
have a positive offset from ground equal to the V

of the PCA9516.

After the 8th clock pulse, the data line will be pulled to the V

of the

slave device that is very close to ground in our example.

It is important to note that any arbitration or clock stretching events
on Bus 1 require that the V

of the devices on Bus 1 be 70 mV

below the V

of the PCA9516 (see V

ilc

in the DC

Characteristics section) to be recognized by the PCA9516 and then
transmitted to Bus 0.

9th CLOCK PULSE

OF SLAVE

OF PCA9516

2 V/DIV

SW00966

Figure 6. Bus 1 waveform

Philips Semiconductors

Product data

PCA9516

5-channel I

C hub

2002 May 13

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

to GND

Supply voltage range V

0.5

bus

Voltage range I

C-bus, SCL or SDA

0.5

DC current (any pin)

tot

Power dissipation

300

stg

Storage temperature range

+125

amb

Operating ambient temperature range

+85

DC ELECTRICAL CHARACTERISTICS

= 3.0 to 3.6 V; GND = 0 V; T

amb

= 40 to +85

C; unless otherwise specified.

SYMBOL

PARAMETER

TEST CONDITIONS

LIMITS

UNIT

SYMBOL

PARAMETER

TEST CONDITIONS

MIN.

TYP.

MAX.

UNIT

Supplies

DC supply voltage

3.0

3.3

3.6

CCH

Quiescent supply current,
both channels HIGH

= 3.6 V;

SDAn = SCLn = V

CCL

Quiescent supply current,
both channels LOW

= 3.6 V;

one SDA and one SCL = GND,
other SDA and SCL open

6.8

CCLc

Quiescent supply current in contention

= 3.6 V;

SDAn = SCLn = GND

Input SCL; input/output SDA

High-level input voltage

0.7 V

5.5

Low-level input voltage (Note 1)

0.5

0.3 V

ILc

Low-level input voltage contention
(Note 1)

0.5

0.4

Input clamp voltage

= 18 mA

1.2

Input leakage current

= 3.6 V

Input current LOW, SDA, SCL

= 0.2 V, SDA, SCL

Low level output

= 0 or 6 mA

0.47

.52

0.6

ILc

Low level input voltage below
output low level voltage

Guaranteed by design

Output high level leakage current

= 3.6 V

Input capacitance

= 3 V or 0 V

Enable 14

LOW level input voltage

0.5

0.8

HIGH level input voltage

2.0

5.5

Input current LOW, EN1EN4

= 0.2 V, EN1EN4

Input leakage current

Input capacitance

= 3.0 V or 0 V

NOTE:
1. V

specification is for enable input and the first low level seen by the SDAx/SCLx lines. V

ILc

is for the second and subsequent low levels

seen by the SDAx/SCLx lines.

Philips Semiconductors

Product data

PCA9516

5-channel I

C hub

2002 May 13

AC ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

TEST CONDITIONS

LIMITS

UNIT

SYMBOL

PARAMETER

TEST CONDITIONS

MIN.

TYP.

MAX.

UNIT

PHL

Propagation delay

Waveform 1

115

170

PLH

Propagation delay

Waveform 1

THL

Transition time

Waveform 1

TLH

Transition time

Waveform 1; Note 1

135

SET

Enable to Start condition

100

HOLD

Enable after Stop condition

100

NOTE:
1. The t

TLH

transition time is guaranteed with loads of 1.35 k

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

3.3 V

0.1 V

1.5 V

INPUT

OUTPUT

3.3 V

PHL

PLH

80%

20%

1.5 V

80%

20%

THL

TLH

SW00646

Waveform 1.

TEST CIRCUIT

DEFINITIONS

Load resistor; 1.35 k

Load capacitance includes jig and probe capacitance;
7 pF

Termination resistance should be equal to Z

OUT

pulse generators.

PULSE

GENERATOR

D.U.T.

OUT

Test Circuit for Open Drain Outputs

SW00792

Philips Semiconductors

Product data

PCA9516

5-channel I

C hub

2002 May 13

Purchase of Philips I

C components conveys a license under the Philips' I

C patent

to use the components in the I

C system provided the system conforms to the

C specifications defined by Philips. This specification can be ordered using the

code 9398 393 40011.

Definitions

Short-form specification -- The data in a short-form specification is extracted from a full data sheet with the same type number and title. For
detailed information see the relevant data sheet or data handbook.

Limiting values definition -- Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one
or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or
at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended
periods may affect device reliability.

Application information -- Applications that are described herein for any of these products are for illustrative purposes only. Philips
Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or
modification.

Disclaimers

Life support -- These products are not designed for use in life support appliances, devices or systems where malfunction of these products can
reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications
do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application.

Right to make changes -- Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard
cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no
responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless
otherwise specified.

Contact information

For additional information please visit
http://www.semiconductors.philips.com.

Fax: +31 40 27 24825

For sales offices addresses send e-mail to:
sales.addresses@www.semiconductors.philips.com.

Koninklijke Philips Electronics N.V. 2002

Date of release: 05-02

Document order number:

9397 750 09815

Philips

Semiconductors

Data sheet status

[1]

Objective data

Preliminary data

Product data

Product
status

[2]

Development

Qualification

Production

Definitions

This data sheet contains data from the objective specification for product development.
Philips Semiconductors reserves the right to change the specification in any manner without notice.

This data sheet contains data from the preliminary specification. Supplementary data will be
published at a later date. Philips Semiconductors reserves the right to change the specification
without notice, in order to improve the design and supply the best possible product.

This data sheet contains data from the product specification. Philips Semiconductors reserves the
right to make changes at any time in order to improve the design, manufacturing and supply.
Changes will be communicated according to the Customer Product/Process Change Notification
(CPCN) procedure SNW-SQ-650A.

Data sheet status

[1] Please consult the most recently issued data sheet before initiating or completing a design.

[2] The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at URL

http://www.semiconductors.philips.com.

Part Number PCA9516

Document Outline