IDT5V9910A Datasheet, PDF (1/6 Pages) Integrated Device Technology – 3.3V LOW SKEW PLL CLOCK DRIVER TURBOCLOCK JR

IDT5V9910A
3.3V LOW SKEW PLL CLOCK DRIVER TURBOCLOCK JR.
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
3.3V LOW SKEW
PLL CLOCK DRIVER
TURBOCLOCK™ JR.
IDT5V9910A
FEATURES:
• Eight zero delay outputs
• <250ps of output to output skew
• Selectable positive or negative edge synchronization
• Synchronous output enable
• Output frequency: 15MHz to 85MHz
• 3 skew grades:
IDT5V9910A-2: tSKEW0<250ps
IDT5V9910A-5: tSKEW0<500ps
IDT5V9910A-7: tSKEW0<750ps
• 3-level inputs for PLL range control
• PLL bypass for DC testing
• External feedback, internal loop filter
• 12mA balanced drive outputs
• Low Jitter: <200ps peak-to-peak
• Available in SOIC package
DESCRIPTION:
The IDT5V9910A is a high fanout phase locked-loop clock driver
intended for high performance computing and data-communications appli-
cations. It has eight zero delay LVTTL outputs.
When the GND/sOE pin is held low, all the outputs are synchronously
enabled. However, if GND/sOE is held high, all the outputs except Q2 and
Q3 are synchronously disabled.
Furthermore, when the VCCQ/PE is held high, all the outputs are
synchronized with the positive edge of the REF clock input. When VCCQ/
PE is held low, all the outputs are synchronized with the negative edge of
REF.
The FB signal is compared with the input REF signal at the phase detector
in order to drive the VCO. Phase differences cause the VCO of the PLL to
adjust upwards or downwards accordingly.
An internal loop filter moderates the response of the VCO to the phase
detector. The loop filter transfer function has been chosen to provide minimal
jitter (or frequency variation) while still providing accurate responses to input
frequency changes.
FUNCTIONAL BLOCK DIAGRAM
VCCQ/PE
GND/sOE
Q0
Q1
Q2
FB
Q3
PLL
REF
Q4
Q5
FS
Q6
Q7
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
COMMERCIAL AND INDUSTRIAL
c 2001 Integrated Device Technology, Inc.
TEMPERATURE
1
RANGES
SEPTEMBER 2001
DSC 5847/1