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7B991RPFI Datasheet

  • 7B991RPFI

  • Programmable Skew Clock Buffer (PSCB)

  • 17頁(yè)

  • MAXWELL

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7B991
Programmable Skew
Clock Buffer (PSCB)
Logic Diagram
Memory
F
EATURES
:
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All output pair skew < 100 ps typical (250 max.)
3.75 to 80 MHz output operation
User-selectable output functions
Selectable skew to 18 ns
Inverted and non-inverted
Operation at 錕?frac12; and 錄 input frequency
Operation at 2x and 4x input frequency (input as low as
3.75 MHz)
Zero input to output delay
50% duty-cycle outputs
Outputs drive 50
鈩?/div>
terminated lines
Low operating current
Package: 32-pin R
AD
-P
AK
廬 flat package
Jitter < 200 ps peak-to-peak (< 25 ps RMS)
Compatible with Pentium鈩?based processor
Total dose hardness:
- >100 krads (Si), depending upon space mission
Excellent Single Event Effects:
- SEL > 116MeV/mg/cm
2
- SEU
TH
-3 MeV/mg/cm
2
- SEU sat cross section: 1E-3/device
D
ESCRIPTION
:
Maxwell Technologies鈥?7B991 Programmable Skew Clock
Buffers (PSCB) offer user-selectable control over system
clock functions. These multiple-output clock drivers provide
the system integrator with functions necessary to optimize tim-
ing of high-performance computer systems. Eight individual
drivers, arranged as four pairs of user-controllable outputs,
can each drive terminated transmission lines with impedances
as low as 50
鈩?/div>
while delivering minimal and specified output
skews and full-swing logic levels.
Each output can be hardwired to one of nine delay or function
configurations. Delay increments of 0.7 to 1.5 ns are deter-
mined by the operating frequency with outputs able to skew up
to 鹵 6 time units from their nominal 鈥渮ero鈥?skew position. The
completely integrated PLL allows external load and transmis-
sion line delay effects to be canceled. When this 鈥渮ero delay鈥?/div>
capability of the PSCB is combined with the selectable output
skew functions, the user can create output-to-output delays of
up to 鹵12 time units.
Maxwell Technologies' patented R
AD
-P
AK
廬 packaging technol-
ogy incorporates radiation shielding in the microcircuit pack-
age. It eliminates the need for box shielding while providing
the required radiation shielding for a lifetime in orbit or space
mission. In a GEO orbit, R
AD
-P
AK
provides greater than 100
krad (Si) radiation dose tolerance. This product is available
with screening up to Class S.
09.23.02 Rev 4
All data sheets are subject to change without notice
1
(858) 503-3300 - Fax: (858) 503-3301 - www.maxwell.com
漏2002 Maxwell Technologies.
All rights reserved.

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    Programmable Skew Clock Buffer (PSCB)
    MAXWELL
  • 英文版
    Programmable Skew Clock Buffer (PSCB)
    MAXWELL [M...
  • 英文版
    Programmable Skew Clock Buffer (PSCB)
    MAXWELL
  • 英文版
    Programmable Skew Clock Buffer (PSCB)
    MAXWELL [M...
  • 英文版
    Programmable Skew Clock Buffer (PSCB)
    MAXWELL
  • 英文版
    Programmable Skew Clock Buffer (PSCB)
    MAXWELL [M...
  • 英文版
    Programmable Skew Clock Buffer (PSCB)
    MAXWELL
  • 英文版
    Programmable Skew Clock Buffer (PSCB)
    MAXWELL [M...
  • 英文版
    Programmable Skew Clock Buffer (PSCB)
    MAXWELL
  • 英文版
    Programmable Skew Clock Buffer (PSCB)
    MAXWELL [M...

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