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CDCF2510PWR Datasheet(PDF) 1 Page - Texas Instruments

Part # CDCF2510PWR
Description  3.3V Phase-Lock Loop Clock Driver
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

CDCF2510PWR Datasheet(HTML) 1 Page - Texas Instruments

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CDCF2510
3.3V PHASELOCK LOOP CLOCK DRIVER
SCAS628D − APRIL 1999 − REVISED DECEMBER 2004
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D Use CDCVF2510A as a Replacement for
this Device
D Designed to Meet PC133 SDRAM
Registered DIMM Specification Rev. 0.9
D Spread Spectrum Clock Compatible
D Operating Frequency 25 MHz to 140 MHz
D Static Phase Error Distribution at 66 MHz
to 133 MHz is
±125 ps
D Jitter (cyc−cyc) at 66 MHz to 133 MHz Is
|70| ps
D Available in Plastic 24-Pin TSSOP
D Phase-Lock Loop Clock Distribution for
Synchronous DRAM Applications
D Distributes One Clock Input to One Bank of
10 Outputs
D Output Enable Pin to Enable/Disable All 10
Outputs
D External Feedback (FBIN) Terminal Is Used
to Synchronize the Outputs to the Clock
Input
D On-Chip Series Damping Resistors
D No External RC Network Required
D Operates at 3.3 V
description
The CDCF2510 is a high-performance, low-skew, low-jitter, phase-lock loop (PLL) clock driver. It uses a PLL
to precisely align, in both frequency and phase, the feedback (FBOUT) output to the clock (CLK) input signal.
It is specifically designed for use with synchronous DRAMs. The CDCF2510 operates at a 3.3-V VCC. It also
provides integrated series-damping resistors that make it ideal for driving point-to-point loads.
One bank of ten outputs provide ten low-skew, low-jitter copies of CLK. Output signal duty cycles are adjusted
to 50%, independent of the duty cycle at CLK. The outputs can be enabled/disabled with the control (G) input.
When the G input is high, the outputs switch in phase and frequency with CLK; when the G input is low, the
outputs are disabled to the logic-low state.
Unlike many products containing PLLs, the CDCF2510 does not require external RC networks. The loop filter
for the PLL is included on-chip, minimizing component count, board space, and cost.
Because it is based on PLL circuitry, the CDCF2510 requires a stabilization time to achieve phase lock of the
feedback signal to the reference signal. This stabilization time is required following power up and application
of a fixed-frequency, fixed-phase signal at CLK, and following any changes to the PLL reference or feedback
signals. The PLL can be bypassed for test purposes by strapping AVCC to ground.
The CDCF2510 is characterized for operation from 0
°C to 85°C.
For
application
information
see
the
High
Speed
Distribution
Design
Techniques
for
CDC509/516/2509/2510/2516 (literature number SLMA003) and Using CDC2509A/2510A PLL with Spread
Spectrum Clocking (SSC) (literature number SCAA039) application reports.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright
 2004, Texas Instruments Incorporated
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.
CLK
AVCC
VCC
1Y9
1Y8
GND
GND
1Y7
1Y6
1Y5
VCC
FBIN
1
2
3
4
5
6
7
8
9
10
11
12
AGND
VCC
1Y0
1Y1
1Y2
GND
GND
1Y3
1Y4
VCC
G
FBOUT
24
23
22
21
20
19
18
17
16
15
14
13
PW PACKAGE
(TOP VIEW)


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