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Numéro de référence | QS5930T | ||
Description | LOW SKEW CMOS PLL CLOCK DRIVER | ||
Fabricant | Integrated Device Technology | ||
Logo | |||
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QS5930T
LOW SKEW CMOS PLL CLOCK DRIVER WITH INTEGRATED LOOP FILTER
LOW SKEW CMOS PLL
CLOCK DRIVER WITH
INTEGRATED LOOP FILTER
INDUSTRIALTEMPERATURERANGE
QS5930T
FEATURES:
• 5V operation
• Q/2 output, 5 Q outputs
• Useful for Pentium, PowerPC, and PCI systems
• Internal loop filter RC network
• Low noise TTL level outputs
• <250ps rising edge output skew
• Balanced drive outputs ±24mA
• PLL bypass feature for low frequency testing
• Internal VCO/2 option for wider frequency range
• Outputs tri-state and reset while OE/RST is low
• ESD > 2000V
• Latch up > -300mA
• Available in QSOP package
FUNCTIONAL BLOCK DIAGRAM
DESCRIPTION
The QS5930T Clock Driver uses an internal phase locked loop
(PLL) to lock low skew outputs to a reference clock input. Six outputs
are available: Q0–Q4, Q/2. Careful layout and design ensure < 250ps
skew between the Q0–Q4, and Q/2 outputs. The QS5930T includes
an internal RC filter which provides excellent jitter characteristics and
eliminates the need for external components. Various combinations of
feedback and a divide-by-2 in the VCO path allow applications to be
customized for linear VCO operation over a wide range of input SYNC
frequencies. The PLL can also be disabled by the PLL_EN signal to
allow low frequency or DC testing. The QS5930T is designed for use
in cost sensitive high-performance computing systems, workstations,
multi-board computers, networking hardware, and mainframe sys-
tems. Several can be used in parallel or scattered throughout a sys-
tem for guaranteed low skew, system-wide clock distribution networks.
In the QSOP package, the QS5930T clock driver represents the best
value in small form factor, high-performance clock management prod-
ucts.
For more information on PLL clock driver products, see Application
Note AN-227.
SYNC
O E /R S T
FEEDBACK
PH ASE
DETECTOR
LOOP
FILTER
VCO
PLL_EN
FREQ_SEL
01
1 /2 0
RD
Q
RD
Q
RD
Q
RD
Q
RD
Q
RD
QQ
Q/2 Q4 Q3
INDUSTRIAL TEMPERATURE RANGE
c 2000 Integrated Device Technology, Inc.
1
Q2
Q1 Q0
SEPTEMBER 2000
DSC-5849
Datasheet pdf - http://www.DataSheet4U.net/
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Pages | Pages 6 | ||
Télécharger | [ QS5930T ] |
No | Description détaillée | Fabricant |
QS5930T | LOW SKEW CMOS PLL CLOCK DRIVER | Integrated Device Technology |
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