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INTEGRATED CIRCUITS
PCA9516A 5-channel I2C hub
Product data sheet Supersedes data of 2004 May 28 2004 Sep 29
Philips Semiconductors
Philips Semiconductors
Product data sheet
5-channel I2C hub
PCA9516A
DESCRIPTION
The PCA9516A is a CMOS 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 PCA9516A 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. Two or more PCA9516As cannot be put in series. The PCA9516A 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 PCA9516A 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 PCA9515A, PCA9516A, or PCA9518 in series, the second PCA9515A, PCA9516A, 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 PCA9515A, PCA9516A, or PCA9518 but can be used in series with themselves since they use shifting instead of static offsets to avoid lock-up conditions.
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 * Powered-off high impedance I2C pins * Operating supply voltage range of 2.3 V to 3.6 V * 5.5 V tolerant I2C and enable pins * 0 kHz to 400 kHz clock frequency1 * ESD protection exceeds 2000 V HBM per JESD22-A114, * Latch-up testing is done to JEDEC Standard JESD78 which * Package offerings: SO16 and TSSOP16
exceeds 100 mA. 200 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101. multiple masters
ORDERING INFORMATION
DESCRIPTION 16-pin plastic SO 16-pin plastic TSSOP TEMPERATURE RANGE -40 C to +85 C -40 C to +85 C ORDER CODE PCA9516AD PCA9516APW TOPSIDE MARK PCA9516AD PA9516A DRAWING NUMBER SOT109-1 SOT403-1
Standard packing quantities and other packaging data is available at www.standardproducts.philips.com/packaging.
1.
The maximum system operating frequency may be less than 400 kHz because of the delays added by the repeater.
2004 Sep 29
2
Philips Semiconductors
Product data sheet
5-channel I2C hub
PCA9516A
PIN CONFIGURATION
SCL0 SDA0 SCL1 SDA1 EN1 SCL2 SDA2 GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC EN4 SDA4 SCL4 EN3 SDA3 SCL3 EN2
PIN DESCRIPTION
PIN 1 2 3 4 5 6 7 8
SU01395
SYMBOL SCL0 SDA0 SCL1 SDA1 EN1 SCL2 SDA2 GND EN2 SCL3 SDA3 EN3 SCL4 SDA4 EN4 VCC
FUNCTION 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 Supply power
9 10 11 12 13 14 15 16
Figure 1. Pin configuration
2004 Sep 29
3
Philips Semiconductors
Product data sheet
5-channel I2C hub
PCA9516A
BLOCK DIAGRAM
VCC
PCA9516A
SCL0 BUFFER BUFFER SCL1 HUB LOGIC SCL4
BUFFER
BUFFER SCL2 BUFFER
SCL3
SDA0
BUFFER BUFFER SDA4
SDA1
BUFFER
HUB LOGIC
BUFFER SDA2 BUFFER
SDA3
EN1
EN4
EN2
EN3
SW02248
GND
Figure 2. Block Diagram: PCA9516A 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.
2004 Sep 29
4
Philips Semiconductors
Product data sheet
5-channel I2C hub
PCA9516A
FUNCTIONAL DESCRIPTION
The PCA9516A 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 PCA9516A 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 PCA9516A acts like five pairs of non-inverting, open drain buffers, one for SDA and one for SCL.
SDA0/SCL0. If the SDA0/SCL0 port is not used, the pins need to be pulled to VCC through appropriately sized resistors. The PCA9516A is 5.5 V tolerant so it does not require any additional circuitry to translate between the different bus voltages. When one side of the PCA9516A 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 PCA9516A will typically be at VOL = 0.5 V.
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.
3.3 V 5V
SDA SCL BUS MASTER
SDA0 SCL0
SDA1 SCL1 3.3 V
SDA SLAVE 1 SCL 400 kHz
EN1 EN2 EN3 EN4 400 kHz SDA2 SCL2 5V PCA9516A SDA SLAVE 2 SCL 400 kHz
I2C Systems
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 is 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. 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 PCA9515A/PCA9516A in a system or using the PCA9515A/16A in conjunction with the P82B96.
SDA3 SCL3
SDA SLAVE 3 SCL 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 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. Unused ports should be isolated by holding the enable pin to GND and/or pulling SDA/SCL pins to VCC through appropriately sized resistors. The primary bus master is normally connected to
SDA4 SCL4
SW02249
Figure 4. Typical application
2004 Sep 29
5
Philips Semiconductors
Product data sheet
5-channel I2C hub
PCA9516A
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 PCA9516A, 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 PCA9516A. Because the VOL of the PCA9516A 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.
On the Bus 1 side of the PCA9516A, the clock and data lines would have a positive offset from ground equal to the VOL of the PCA9516A. 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. 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 PCA9516A (see VOL - Vilc in the DC Characteristics section) to be recognized by the PCA9516A and then transmitted to Bus 0.
2 V/DIV 9th CLOCK PULSE
VOL OF PCA9516A
VOL OF MASTER
SW02250
Figure 5. Bus 0 waveform
9th CLOCK PULSE
2 V/DIV
VOL OF PCA9516A
VOL OF SLAVE
SW02251
Figure 6. Bus 1 waveform
2004 Sep 29
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Philips Semiconductors
Product data sheet
5-channel I2C hub
PCA9516A
ABSOLUTE MAXIMUM RATINGS
Limiting values in accordance with the Absolute Maximum System (IEC 134). Voltages with respect to pin GND. LIMITS SYMBOL VCC to GND Vbus I Ptot Tstg Tamb Supply voltage range VCC Voltage range I2C-bus, SCL or SDA DC current (any pin) Power dissipation Storage temperature range Operating ambient temperature range PARAMETER MIN. -0.5 -0.5 -- -- -55 -40 MAX. +7 +7 50 300 +125 +85 UNIT V V mA mW C C
DC ELECTRICAL CHARACTERISTICS
VCC = 3.0 V to 3.6 V; GND = 0 V; Tamb = -40 C to +85 C; unless otherwise specified. SYMBOL Supplies VCC ICCH ICCL DC supply voltage Quiescent supply current, both channels HIGH Quiescent supply current, both channels LOW Quiescent supply current in contention VCC = 3.6 V; SDAn = SCLn = VCC VCC = 3.6 V; one SDA and one SCL = GND, other SDA and SCL open VCC = 3.6 V; SDAn = SCLn = GND 3.0 -- -- -- 2.1 4.7 3.6 5 10 V mA mA PARAMETER TEST CONDITIONS LIMITS MIN. TYP.2 MAX. UNIT
ICCLc
--
4.0
10
mA
Input SCL; input/output SDA VIH VIL VILc VIK ILI IIL VOL VOL-VILc CI Enable 1-4 VIL VIH IIL ILI CI LOW-level input voltage HIGH-level input voltage Input current LOW, EN1-EN4 Input leakage current Input capacitance VI = 3.0 V or 0 V VI = 0.2 V, EN1-EN4 -0.5 2.0 -- -1 -- -- -- -12 -- 6 0.8 5.5 -30 1 7 V V A A pF HIGH-level input voltage LOW-level input voltage (Note 1) LOW-level input voltage contention (Note 1) Input clamp voltage Input leakage current Input current LOW, SDA, SCL LOW-level output voltage LOW-level input voltage below output LOW-level voltage Input capacitance II = -18 mA VI = 3.6 V VI = 0.2 V, SDA, SCL IOL = 0 or 6 mA Guaranteed by design VI = 3 V or 0 V 0.7 VCC -0.5 -0.5 -- -1 -- 0.47 -- -- -- -- -- -- -- -- 0.52 -- 6 5.5 0.3 VCC 0.4 -1.2 1 5 0.6 70 10 V V V V A A V mV pF
NOTES: 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. 2. Typical value taken at 3.3 V and 25 C. 3. For operation between published voltage ranges, refer to worst case parameter in both ranges.
2004 Sep 29
7
Philips Semiconductors
Product data sheet
5-channel I2C hub
PCA9516A
DC ELECTRICAL CHARACTERISTICS
VCC = 2.3 V to 2.7 V; GND = 0 V; Tamb = -40 C to +85 C; unless otherwise specified. SYMBOL Supplies VCC ICCH ICCL DC supply voltage Quiescent supply current, both channels HIGH Quiescent supply current, both channels LOW Quiescent supply current in contention VCC = 2.7 V; SDAn = SCLn = VCC VCC = 2.7 V; one SDA and one SCL = GND, other SDA and SCL open VCC = 2.7 V; SDAn = SCLn = GND 2.3 -- -- -- 2.1 4.6 2.7 5 10 V mA mA PARAMETER TEST CONDITIONS LIMITS MIN. TYP.2 MAX. UNIT
ICCLc
--
3.9
10
mA
Input SCL; input/output SDA VIH VIL VILc VIK ILI IIL VOL VOL-VILc CI Enable 1-4 VIL VIH IIL ILI CI LOW-level input voltage HIGH-level input voltage Input current LOW, EN1-EN4 Input leakage current Input capacitance VI = 3.0 V or 0 V VI = 0.2 V, EN1-EN4 -0.5 1.5 -- -1 -- -- -- -10 -- 6 0.8 5.5 -30 1 7 V V A A pF HIGH-level input voltage LOW-level input voltage (Note 1) LOW-level input voltage contention (Note 1) Input clamp voltage Input leakage current Input current LOW, SDA, SCL LOW-level output voltage LOW-level input voltage below output LOW-level voltage Input capacitance II = -18 mA VI = 2.7 V VI = 0.2 V, SDA, SCL IOL = 0 or 6 mA Guaranteed by design VI = 3 V or 0 V 0.7 VCC -0.5 -0.5 -- -1 -- 0.47 -- -- -- -- -- -- -- -- 0.52 -- 6 5.5 0.3 VCC 0.4 -1.2 1 5 0.6 70 10 V V V V A A V mV pF
NOTES: 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. 2. Typical value taken at 2.5 V and 25 C.
2004 Sep 29
8
Philips Semiconductors
Product data sheet
5-channel I2C hub
PCA9516A
AC ELECTRICAL CHARACTERISTICS
VCC = 2.3 V to 2.7 V SYMBOL tPHL tPLH tTHL tTLH tSET tHOLD PARAMETER Propagation delay Propagation delay Transition time Transition time Enable to Start condition Enable after Stop condition TEST CONDITIONS Waveform 1 Waveform 1; Note 1 Waveform 1 Waveform 1; Note 1 LIMITS MIN. 45 33 -- -- 100 130 TYP.2 93 90 60 131 -- -- MAX. 150 135 -- -- -- -- UNIT ns ns ns ns ns ns
NOTES: 1. Different load resistance and capacitance will alter the RC time constant, thereby changing the propagation delay and transition times. 2. Typical value taken at 2.5 V and 25 C.
AC ELECTRICAL CHARACTERISTICS
VCC = 3.0 V to 3.6 V SYMBOL tPHL tPLH tTHL tTLH tSET tHOLD PARAMETER Propagation delay Propagation delay Transition time Transition time Enable to Start condition Enable after Stop condition TEST CONDITIONS Waveform 1 Waveform 1; Note 1 Waveform 1 Waveform 1; Note 1 LIMITS MIN. 45 33 -- -- 100 100 TYP.2 75 60 47 130 -- -- MAX. 120 83 -- -- -- -- UNIT ns ns ns ns ns ns
NOTES: 1. Different load resistance and capacitance will alter the RC time constant, thereby changing the propagation delay and transition times. 2. Typical value taken at 3.3 V and 25 C.
AC WAVEFORMS
3.3 V INPUT 1.5 V 1.5 V 0.1 V tPHL 80% OUTPUT 1.5 V 20% tTHL 1.5 V 20% VOL tTLH tPLH 3.3 V 80%
TEST CIRCUIT
VCC VCC
RL VIN PULSE GENERATOR RT D.U.T. VOUT
CL
Test Circuit for Open Drain Outputs
SW00646
DEFINITIONS
RL = Load resistor; 1.35 k CL = Load capacitance includes jig and probe capacitance; 50 pF RT = Termination resistance should be equal to ZOUT of pulse generators.
SW02280
Waveform 1.
Figure 7. Test circuit
2004 Sep 29
9
Philips Semiconductors
Product data sheet
5-channel I2C hub
PCA9516A
SO16: plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
2004 Sep 29
10
Philips Semiconductors
Product data sheet
5-channel I2C hub
PCA9516A
TSSOP16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm
SOT403-1
2004 Sep 29
11
Philips Semiconductors
Product data sheet
5-channel I2C hub
PCA9516A
REVISION HISTORY
Rev _2 Date 20040929 Description Product data sheet (9397 750 14108). Supersedes data of 2004 May 28 (9397 750 13238). Modifications:
* "Application information" section on page 5:
- First paragraph, third sentence: change from "... unless slave 3 and 4 are isolated ..." to "... unless slave 3 is isolated ..." - Add (new) third paragraph. - Figure 4 modified. _1 20040528 Product data sheet (9397 750 13238).
2004 Sep 29
12
Philips Semiconductors
Product data sheet
5-channel I2C hub
PCA9516A
Purchase of Philips I2C components conveys a license under the Philips' I2C patent to use the components in the I2C system provided the system conforms to the I2C specifications defined by Philips. This specification can be ordered using the code 9398 393 40011.
Data sheet status
Level
I
Data sheet status [1]
Objective data
Product status [2] [3]
Development
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. Relevant changes will be communicated via a Customer Product/Process Change Notification (CPCN).
II
Preliminary data
Qualification
III
Product data
Production
[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. [3] For data sheets describing multiple type numbers, the highest-level product status determines the data sheet status.
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 in the products--including circuits, standard cells, and/or software--described or contained herein in order to improve design and/or performance. When the product is in full production (status `Production'), relevant changes will be communicated via a Customer Product/Process Change Notification (CPCN). 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
(c) Koninklijke Philips Electronics N.V. 2004 All rights reserved. Published in the U.S.A. Date of release: 09-04
For sales offices addresses send e-mail to: sales.addresses@www.semiconductors.philips.com.
Document number:
9397 750 14108
Philips Semiconductors
2004 Sep 29 13

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