CDC2586 Datasheet, PDF (1/12 Pages) Texas Instruments – 3.3-V PHASE-LOCK LOOP CLOCK DRIVER WITH 3-STATE OUTPUTS

D Low Output Skew for Clock-Distribution
and Clock-Generation Applications
D Operates at 3.3-V V_CC
D Distributes One Clock Input to Twelve
Outputs
D Two Select Inputs Configure Up to Nine
Outputs to Operate at One-Half or Double
the Input Frequency
D No External RC Network Required
D External Feedback (FBIN) Synchronizes the
Outputs to the Clock Input
CDC2586
3.3-V PHASE-LOCK LOOP CLOCK DRIVER
WITH 3-STATE OUTPUTS
SCAS337C – FEBRUARY 1993 – REVISED OCTOBER 1998
D Application for Synchronous DRAM,
High-Speed Microprocessor
D TTL-Compatible Inputs and Outputs
D Outputs Have Internal 26-Ω Series
Resistors to Dampen Transmission-Line
Effects
D State-of-the-Art EPIC-ΙΙB™ BiCMOS Design
Significantly Reduces Power Dissipation
D Distributed V_CC and Ground Pins Reduce
Switching Noise
D Packaged in 52-Pin Thin Quad Flat Package
PAH PACKAGE
(TOP VIEW)
GND
1Y1
V_CC
GND
1Y2
V_CC
GND
1Y3
V_CC
GND
GND
2Y1
V_CC
52 51 50 49 48 47 46 45 44 43 42 41 40
1
39
2
38
3
37
4
36
5
35
6
34
7
33
8
32
9
31
10
30
11
29
12
28
13
27
14 15 16 17 18 19 20 21 22 23 24 25 26
V_CC
4Y3
GND
V_CC
4Y2
GND
V_CC
4Y1
GND
GND
V_CC
3Y3
GND
NC – No internal connection
description
The CDC2586 is a high-performance, low-skew, low-jitter clock driver. It uses a phase-lock loop (PLL) to
precisely align, in both frequency and phase, the clock output signals to the clock input (CLKIN) signal. It is
specifically designed for use with popular microprocessors operating at speeds from 50 MHz to 100 MHz or
down to 25 MHz on outputs configured for half-frequency operation. Each output has an internal 26-Ω series
resistor that improves the signal integrity at the load. The CDC2586 operates at nominal 3.3-V V_CC.
The feedback input (FBIN) synchronizes the output clocks in frequency and phase to CLKIN. One of the twelve
output clocks must be fed back to FBIN for the PLL to maintain synchronization between CLKIN and the outputs.
The output used as feedback is synchronized to the same frequency as CLKIN.
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.
EPIC-ΙΙΒ is a trademark of Texas Instruments Incorporated.
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 © 1998, Texas Instruments Incorporated
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
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