www.ti.com

FEATURES

APPLICATIONS

1

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13

VDDREF

REFCLK

VDDP

GNDP

GND

LEADLAG

DLYCTRL

GNDPA

VDDPA

VDDPD

STOPB

PWRDNB

P0

P1

VDDO

GNDO

CLKOUT

NC

CLKOUTB

GNDO

VDDO

MULT0

MULT1

P2

DBQ PACKAGE

(TOP VIEW)

DESCRIPTION

Not Recommended for New Designs

CDCF5801

SCAS698F – SEPTEMBER 2003 – REVISED APRIL 2006

CLOCK MULTIPLIER WITH DELAY CONTROL AND PHASE ALIGNMENT

(Not Recommended for New Designs Use CDCF5801A as a Replacement)

•

Video Graphics

•

Low-Jitter Clock Multiplier:

×1, ×2, ×4, ×8

•

Gaming Products

•

Programmable Bidirectional Delay Steps of

•

Datacom

1.3 mUI

•

Telecom

•

Output Frequency Range of 25 MHz to

•

Noise Cancellation Created by FPGAs

280 MHz

•

Input Frequency Range of 12.5 MHz to

240 MHz

•

Low Jitter Generation

•

Single-Ended REFCLK Input With Adjustable

Trigger Level (Works With LVTTL, HSTL, and

LVPECL)

•

Differential/Single-Ended Output

•

Output Can Drive LVPECL, LVDS, and LVTTL

•

Three Power Operating Modes to Minimize

Power

•

Low Power Consumption (< 190 mW at

280 MHz/3.3 V)

•

Packaged in a Shrink Small-Outline Package

(DBQ)

•

No External Components Required for PLL

•

Spread Spectrum Clock Tracking Ability to

Reduce EMI (SSC)

The CDCF5801 provides clock multiplication from a reference clock (REFCLK) signal with the unique capability

to delay or advance the CLKOUT/CLKOUTB with steps of only 1.3 mUI through a phase aligner. For every rising

edge on the DLYCTRL pin the CLKOUT is delayed by a 1.3-mUI step size as long as the LEADLAG input

detects a low signal at the time of the DLYCTRL rising edge. Similarly for every rising edge on the DLYCTRL pin

the CLKOUT is advanced by a 1.3-mUI step size as long as the LEADLAG pin is high during the transition. This

unique capability allows the device to phase align (zero delay) between CLKOUT/CLKOUTB and any one other

CLK in the system by feeding the clocks that need to be aligned to the DLYCTRL and the LEADLAG pins. Also

it provides the capability to program a fixed delay by providing the proper number of edges on the DLYCTRL

pin, while strapping the LEADLAG pin to dc high or low. Further possible applications are:

•

Aligning the rising edge of the output clock signal to the input clock rising edge

•

Avoiding PLL instability in applications that require very long PLL feedback lines

•

Isolation of jitter and digital switching noise

•

Limitation of jitter in systems with good ppm frequency stability

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Copyright © 2003–2006, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.