pck942p NXP Semiconductors, pck942p Datasheet

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pck942p

Manufacturer Part Number
pck942p
Description
Pck942p Low Voltage 1 18 Clock Distribution Chip
Manufacturer
NXP Semiconductors
Datasheet

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1. General description
2. Features
The PCK942P is a 1 : 18 low voltage clock distribution chip with 2.5 V or 3.3 V LVCMOS
output capabilities. The device is offered in two versions: the PCK942C has an LVCMOS
input clock, while the PCK942P has a LVPECL input clock. The 18 outputs are 2.5 V or
3.3 V LVCMOS compatible and feature the drive strength to drive 50
transmission lines. With output-to-output skews of 200 ps, the PCK942P is ideal as a
clock distribution chip for the most demanding of synchronous systems. The 2.5 V output
also makes the device ideal for supplying clocks for a higher performance Pentium II
microprocessor-based design.
With a low output impedance of approximately 12 , in both the HIGH and LOW logic
states, the output buffers of the PCK942P are ideal for driving series-terminated
transmission lines. With an output impedance of 12 , the PCK942P can drive two
series-terminated transmission lines from each output. This capability gives the PCK942P
an effective fan-out of 1 : 36. The PCK942P provides enough copies of low skew clocks
for most high performance synchronous systems.
The differential LVPECL inputs of the PCK942P allow the device to interface directly with a
LVPECL fan-out buffer like the MC100EP111 to build very wide clock fan-out trees or to
couple to a high frequency clock source. The OE pin will place the outputs to a
high-impedance state. The OE pin has an internal pull-up resistor.
The PCK942P is a single supply device. The V
The 32-lead LQFP package was chosen to optimize performance, board space, and cost
of the device. The 32-lead LQFP package has a 7 mm
conservative 0.8 mm pin spacing.
PCK942P
Low voltage 1 : 18 clock distribution chip
Rev. 01 — 17 February 2006
LVPECL clock input
2.5 V LVCMOS outputs for Pentium II microprocessor support
200 ps maximum targeted output-to-output skew
Maximum output frequency of 250 MHz at 3.3 V V
32-lead LQFP packaging
Single 3.3 V or 2.5 V supply voltage
CC
power pins require either 2.5 V or 3.3 V.
CC
7 mm body size with a
Product data sheet
series-terminated

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pck942p Summary of contents

Page 1

... Rev. 01 — 17 February 2006 1. General description The PCK942P low voltage clock distribution chip with 2 3.3 V LVCMOS output capabilities. The device is offered in two versions: the PCK942C has an LVCMOS input clock, while the PCK942P has a LVPECL input clock. The 18 outputs are 2 ...

Page 2

... Philips Semiconductors 3. Ordering information Table 1: Type number PCK942PBD 4. Functional diagram Fig 1. Functional diagram of PCK942P 5. Pinning information 5.1 Pinning Fig 2. Pin configuration for LQFP32 9397 750 12261 Product data sheet Ordering information Package Name Description LQFP32 plastic low profile quad flat package; 32 leads; ...

Page 3

... Function table Output high-impedance outputs enabled Limiting values Parameter Conditions supply voltage input voltage input current CMOS inputs storage temperature Rev. 01 — 17 February 2006 PCK942P Low voltage clock distribution chip Min Max 0.3 +3 +125 © Koninklijke Philips Electronics N.V. 2006. All rights reserved. ...

Page 4

... Product data sheet 5 % Conditions PECL_CLK PECL_CLK per output 5 % Conditions PECL_CLK PECL_CLK per output Rev. 01 — 17 February 2006 PCK942P Low voltage clock distribution chip Min Typ Max 2 0.8 0.6 - 1 ...

Page 5

... Across temperature and voltage ranges, includes output skew. 9397 750 12261 Product data sheet 5 % Conditions output-to-output part-to-part part-to-part output output 5 % Conditions output-to-output part-to-part part-to-part output output Rev. 01 — 17 February 2006 PCK942P Low voltage clock distribution chip Min Typ Max - - 200 1.8 - 4.0 2 200 [2] ...

Page 6

... Rev. 01 — 17 February 2006 Low voltage clock distribution chip detail 9.15 0.75 0.9 1 0.2 0.25 0.1 8.85 0.45 0.5 EUROPEAN PROJECTION © Koninklijke Philips Electronics N.V. 2006. All rights reserved. PCK942P SOT358 ( 0.5 0 ISSUE DATE 03-02-25 05-11- ...

Page 7

... Product data sheet Low voltage clock distribution chip 2 called small/thin packages. Rev. 01 — 17 February 2006 PCK942P 3 350 mm so called © Koninklijke Philips Electronics N.V. 2006. All rights reserved ...

Page 8

... LBGA, LFBGA, SQFP, [3] , TFBGA, VFBGA, XSON , SO, SOJ [8] [9] [8] , PMFP , WQCCN.. measured in the atmosphere of the reflow oven. The package Rev. 01 — 17 February 2006 PCK942P Low voltage clock distribution chip Soldering method Wave Reflow not suitable suitable [4] not suitable suitable suitable ...

Page 9

... Low Voltage Complementary Metal Oxide Silicon Low Voltage Positive Emitter Coupled Logic Data sheet status Change notice Product data sheet - Rev. 01 — 17 February 2006 PCK942P Low voltage clock distribution chip Doc. number Supersedes 9397 750 12261 - © Koninklijke Philips Electronics N.V. 2006. All rights reserved. ...

Page 10

... Trademarks Notice — All referenced brands, product names, service names and trademarks are the property of their respective owners. Rev. 01 — 17 February 2006 PCK942P Low voltage clock distribution chip © Koninklijke Philips Electronics N.V. 2006. All rights reserved ...

Page 11

... No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights. Published in The Netherlands PCK942P Date of release: 17 February 2006 Document number: 9397 750 12261 ...

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