pck9447 NXP Semiconductors, pck9447 Datasheet

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pck9447

Manufacturer Part Number
pck9447
Description
3.3 V/2.5 V 1 9 Lvcmos Clock Fan-out Buffer
Manufacturer
NXP Semiconductors
Datasheet

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1. General description
2. Features
The PCK9447 is a 3.3 V or 2.5 V compatible, 1 : 9 clock fan-out buffer targeted for high
performance clock tree applications. With output frequencies up to 350 MHz, and output
skews less than 150 ps, the device meets the needs of most demanding clock
applications.
The PCK9447 is specifically designed to distribute LVCMOS compatible clock signals up
to a frequency of 350 MHz. Each output provides a precise copy of the input signal with
near zero skew. The output buffers support driving of 50
on the incident edge: each is capable of driving either one parallel terminated or two
series terminated transmission lines.
Two selectable independent LVCMOS compatible clock inputs are available, providing
support of redundant clock source systems. The PCK9447 CLK_STOP control is
synchronous to the falling edge of the input clock. It allows the start and stop of the output
clock signal only in a logic LOW state, thus eliminating potential output runt pulses.
Applying the OE control will force the outputs into high-impedance mode.
All inputs have an internal pull-up or pull-down resistor preventing unused and open inputs
from floating. The device supports a 2.5 V or 3.3 V power supply and an ambient
temperature range of 40 C to +85 C. The PCK9447 is pin and function compatible but
performance-enhanced to the PCK947.
PCK9447
3.3 V/2.5 V 1 : 9 LVCMOS clock fan-out buffer
Rev. 01 — 13 October 2005
9 LVCMOS compatible clock outputs
2 selectable, LVCMOS compatible inputs
Maximum clock frequency of 350 MHz
Maximum clock skew of 150 ps
Synchronous output stop in logic LOW state eliminates output runt pulses
High-impedance output control
3.3 V or 2.5 V power supply
Drives up to 18 series terminated clock lines
T
Available in LQFP32 package
Supports clock distribution in networking, telecommunications and computer
applications
Pin and function compatible to PCK947
amb
= 40 C to +85 C
Product data sheet
terminated transmission lines

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pck9447 Summary of contents

Page 1

... Rev. 01 — 13 October 2005 1. General description The PCK9447 2.5 V compatible clock fan-out buffer targeted for high performance clock tree applications. With output frequencies up to 350 MHz, and output skews less than 150 ps, the device meets the needs of most demanding clock applications. The PCK9447 is specifi ...

Page 2

... Philips Semiconductors 3. Ordering information Table 1: Type number PCK9447BD 4. Functional diagram Fig 1. Functional diagram of PCK9447 9397 750 12522 Product data sheet Ordering information Package Name Description LQFP32 plastic low profile quad flat package; 32 leads; body 7 7 1.4 mm PCK9447 CCLK0 ...

Page 3

... Rev. 01 — 13 October 2005 PCK9447 3.3 V/2 LVCMOS clock fan-out buffer 24 GND PCK9447BD 20 GND GND 002aaa715 © Koninklijke Philips Electronics N.V. 2005. All rights reserved. pins must ...

Page 4

... Machine Model voltage Human Body Model latch-up protection current power dissipation per output capacitance input capacitance inputs resistor and a 0.75 H inductor Rev. 01 — 13 October 2005 PCK9447 3.3 V/2 LVCMOS clock fan-out buffer Logic 1 CCLK1 input selected outputs enabled [1] outputs active Min Max 0.3 +3.9 0 ...

Page 5

... I input current I I maximum quiescent current q(max) [1] The PCK9447 is capable of driving 50 transmission line to a termination voltage 2.5 V). CC [2] Inputs have pull-down or pull-up resistors affecting the input current. [ the DC current consumption of the device with all outputs open and the input in its default state or open. ...

Page 6

... Product data sheet 3.3 V/2 LVCMOS clock fan-out buffer [1] [ Conditions CCLK0 or CCLK1 to any Q CCLK0 or CCLK1 to CLK_STOP CCLK0 or CCLK1 to CLK_STOP output-to-output part-to-part f < 170 MHz ref 0. 2 PLH Rev. 01 — 13 October 2005 PCK9447 Min Typ Max 0 - 350 0 - 350 1 1 ...

Page 7

... V/2 LVCMOS clock fan-out buffer [1] [ Conditions CCLK0 or CCLK1 to any Q CCLK0 or CCLK1 to CLK_STOP CCLK0 or CCLK1 to CLK_STOP output-to-output part-to-part f < 170 MHz ref 0 1 PLH N jit(cc) N N+1 Rev. 01 — 13 October 2005 PCK9447 Min Typ Max 0 - 350 0 - 350 1 1 [3] 0 [3] 1 ...

Page 8

... GND t sk( GND 002aab289 ) Fig 8. Output Duty Cycle ( (1) (2) 002aab292 Fig 10. Setup and hold time (t Rev. 01 — 13 October 2005 PCK9447 3.3 V/2 LVCMOS clock fan-out buffer CCLK t t PLH PHL Qn 002aab290 sk(p) PLH PHL ) test reference sk( ...

Page 9

... When taken to its extreme, the fan-out of the PCK9447 clock driver is effectively doubled due to its capability to drive multiple lines. The waveform plots of versus two lines. In both cases the drive capability of the PCK9447 output buffer is more than sufficient to drive 50 measurement in the simulations a delta of only 43 ps exists between the two differently loaded outputs ...

Page 10

... PCK9447 OUTPUT BUFFER Rev. 01 — 13 October 2005 PCK9447 3.3 V/2 LVCMOS clock fan-out buffer 002aaa679 OutA t = 3.8956 ns d OutB t = 3.9386 time (ns 002aaa719 © Koninklijke Philips Electronics N.V. 2005. All rights reserved. ...

Page 11

... Product data sheet 3.3 V/2 LVCMOS clock fan-out buffer PCK9447 D.U. PULSE GENERATOR 3.3 V and V CC Rev. 01 — 13 October 2005 PCK9447 002aab287 = 2 © Koninklijke Philips Electronics N.V. 2005. All rights reserved ...

Page 12

... Rev. 01 — 13 October 2005 3.3 V/2 LVCMOS clock fan-out buffer 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. 2005. All rights reserved. PCK9447 SOT358 ( 0.5 0 ISSUE DATE 00-01-19 03-02- ...

Page 13

... Product data sheet 3.3 V/2 LVCMOS clock fan-out buffer 2 called small/thin packages. Rev. 01 — 13 October 2005 PCK9447 3 350 mm so called © Koninklijke Philips Electronics N.V. 2005. All rights reserved ...

Page 14

... Suitability of surface mount IC packages for wave and reflow soldering methods [1] [3] , LBGA, LFBGA, SQFP, [3] , TFBGA, VFBGA, XSON , SO, SOJ [8] [9] [8] , PMFP , WQCCN..L Rev. 01 — 13 October 2005 PCK9447 3.3 V/2 LVCMOS clock fan-out buffer Soldering method Wave not suitable [4] not suitable suitable [5] [6] not recommended [7] not recommended not suitable © ...

Page 15

... Machine Model Low Voltage Complementary Metal Oxide Silicon Data sheet status Change notice Product data sheet - Rev. 01 — 13 October 2005 PCK9447 3.3 V/2 LVCMOS clock fan-out buffer Doc. number Supersedes 9397 750 12522 - © Koninklijke Philips Electronics N.V. 2005. All rights reserved ...

Page 16

... Trademarks Notice — All referenced brands, product names, service names and trademarks are the property of their respective owners. Rev. 01 — 13 October 2005 PCK9447 © Koninklijke Philips Electronics N.V. 2005. All rights reserved ...

Page 17

... 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 PCK9447 Date of release: 13 October 2005 Document number: 9397 750 12522 ...

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