IDT5V9950PFGI Datasheet, PDF (1/9 Pages) Integrated Device Technology – 3.3V PROGRAMMABLE SKEW PLL CLOCK DRIVER TURBOCLOCK™ II JR.

IDT5V9950
3.3V PROGRAMMABLE SKEW PLL CLOCK DRIVER TURBOCLOCK II JR.
3.3V PROGRAMMABLE
SKEW PLL CLOCK DRIVER
TURBOCLOCK™ II JR.
INDUSTRIAL TEMPERATURE RANGE
IDT5V9950
FEATURES:
• Ref input is 5V tolerant
• 4 pairs of programmable skew outputs
• Low skew: 185ps same pair, 250ps all outputs
• Selectable positive or negative edge synchronization:
Excellent for DSP applications
• Synchronous output enable
• Input frequency: 6MHz to 200MHz
• Output frequency: 6MHz to 200MHz
• 2x, 4x, 1/2, and 1/4 outputs
• 3-level inputs for skew and PLL range control
• PLL bypass for DC testing
• External feedback, internal loop filter
• 12mA balanced drive outputs
• Low Jitter: <100ps cycle-to-cycle
• Available in TQFP package
DESCRIPTION:
The IDT5V9950 is a high fanout 3.3V PLL based clock driver intended
for high performance computing and data-communications applications. A
key feature of the programmable skew is the ability of outputs to lead or lag
the REF input signal. The IDT5V9950 has eight programmable skew
outputs in four banks of 2. Skew is controlled by 3-level input signals that
may be hard-wired to appropriate HIGH-MID-LOW levels.
When the sOE pin is held low, all the outputs are synchronously enabled.
However, if sOE is held high, all the outputs except 2Q0 and 2Q1 are
synchronously disabled.
Furthermore, when PE is held high, all the outputs are synchronized with
the positive edge of the REF clock input. When PE is held low, all the outputs
are synchronized with the negative edge of REF. The IDT5V9950 has
LVTTL outputs with 12mA balanced drive outputs.
FUNCTIONAL BLOCK DIAGRAM
REF
FB
PE TEST
3
PLL
3
FS
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
c 2002 Integrated Device Technology, Inc.
sOE
Skew
Select
3
3
1F1:0
Skew
Select
3
3
2F1:0
Skew
Select
3
3
3F1:0
Skew
Select
3
3
4F1:0
1
1Q0
1Q1
2Q0
2Q1
3Q0
3Q1
4Q0
4Q1
OCTOBER 2008
DSC 5870/6