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PCK2002DL Schematic ( PDF Datasheet ) - NXP Semiconductors

Teilenummer PCK2002DL
Beschreibung 0-300 MHz I2C 1:18 clock buffer
Hersteller NXP Semiconductors
Logo NXP Semiconductors Logo 




Gesamt 12 Seiten
PCK2002DL Datasheet, Funktion
INTEGRATED CIRCUITS
PCK2002
0–300 MHz I2C 1:18 clock buffer
Product data
File under Integrated Circuits ICL03
2001 Jul 19
Philips
Semiconductors






PCK2002DL Datasheet, Funktion
Philips Semiconductors
0–300 MHz I2C 1:18 clock buffer
Product data
PCK2002
Consider the command code and the byte count bytes required as the first two bytes of any transfer. The command code is software
programmable via the controller, but will be specified as 0000 0000 in the clock specification. The byte count byte is the number of additional
bytes required to transfer, not counting the command code and byte count bytes. Additionally, the byte count byte is required to be a minimum of
1 byte and a maximum of 32 bytes to satisfy the above requirement.
For example:
Byte count byte
Notes:
MSB
LSB
0000
0000 Not allowed. Must have at least one byte.
0000
0001 Data for functional and frequency select register (currently byte 0 in spec)
0000
0010 Reads first two bytes of data. (byte 0 then byte 1)
0000
0011 Reads first three bytes (byte 0, 1, 2 in order)
0000
0100 Reads first four bytes (byte 0, 1, 2, 3 in order)
0000
0101 Reads first five bytes (byte 0, 1, 2, 3, 4 in order)
0000
0110 Reads first six bytes (byte 0, 1, 2, 3, 4, 5 in order)
0000
0111 Reads first seven bytes (byte 0, 1, 2, 3, 4, 5, 6 in order)
0010
0000 Max byte count supported = 32
A transfer is considered valid after the acknowledge bit corresponding to the byte count is read by the controller. The serial controller interface
can be simplified by discarding the information in both the command code and the byte count bytes and simply reading all the bytes that are
sent to the clock driver after being addressed by the controller. It is expected that the controller will not provide more bytes than the clock driver
can handle. A clock vendor may choose to discard any number of bytes that exceed the defined byte count.
8) Clock stretching: The clock device must not hold/stretch the SCLOCK or SDATA lines low for more than 10 ms. Clock stretching is
discouraged and should only be used as a last resort. Stretching the clock/data lines for longer than this time puts the device in an error/time-out
mode and may not be supported in all platforms. It is assumed that all data transfers can be completed as specified without the use of
clock/data stretching.
9) General Call: It is assumed that the clock driver will not have to respond to the “general call.”
10) Electrical Characteristics: All electrical characteristics must meet the standard mode specifications found in section 15 of the I2C
specification.
a) Pull-Up Resistors: Any internal resistors pull-ups on the SDATA and SCLOCK inputs must be stated in the individual datasheet. The use of
internal pull-ups on these pins of below 100 k is discouraged. Assume that the board designer will use a single external pull-up resistor for
each line and that these values are in the 5–6 k range. Assume one I2C device per DIMM (serial presence detect), one I2C controller, one
clock driver plus one/two more I2C devices on the platform for capacitive loading purposes.
(b) Input Glitch Filters: Only fast mode I2C devices require input glitch filters to suppress bus noise. The clock driver is specified as a standard
mode device and is not required to support this feature.
11) PWR DWN: If a clock driver is placed in PWR DWN mode, the SDATA and SCLK inputs must be Tri-Stated and the device must retain all
programming information. Idd current due to the I2C circuitry must be characterized and in the data sheet.
For specific I2C information consult the Philips I2C Peripherals Data Handbook IC12 (1997).
2001 Jul 19
6

6 Page









PCK2002DL pdf, datenblatt
Philips Semiconductors
0–300 MHz I2C 1:18 clock buffer
Product data
PCK2002
Data sheet status
Data sheet status [1]
Product
status [2]
Definitions
Objective data
Development 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.
Preliminary data
Qualification
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.
Product data
Production
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.
[1] Please consult the most recently issued datasheet 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.
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 134). 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.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone 800-234-7381
© Copyright Philips Electronics North America Corporation 2001
All rights reserved. Printed in U.S.A.
Document order number:
Date of release: 07-01
9397 750 08585
Philips
Semiconductors
2001 Jul 19
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