PROGRAMMABLE SKEW PLL CLOCK DRIVER TURBOCLOCK
Description
IDT5993A PROGRAMMABLE SKEW PLL CLOCK DRIVER TURBOCLOCK
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
PROGRAMMABLE SKEW PLL CLOCK DRIVER TURBOCLOCK™
FEATURES: DESCRIPTION:
IDT5993A
• 3 pairs of programmable skew outputs • Low skew: 200ps same pair, 250ps all outputs • Selectable positive or negative edge synchronization: Excellent for DSP applications • Synchronous output enable • Output frequency: 3.
75MHz to 100MHz • 2x, 4x, 1/2, and 1/4 outputs • 5V with TTL outputs • 3 skew grades: IDT5993A-2: tSKEW0<250ps IDT5993A-5: tSKEW0<500ps IDT5993A-7: tSKEW0<750ps • 3-level inputs for skew and PLL range control • PLL bypass for DC testing • External feedback, internal loop filter • 46mA IOL high drive outputs • Low Jitter: <200ps peak-to-peak • Outputs drive 50Ω terminated lines • Available in QSOP package
The IDT5993A is a high fanout 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 IDT5993A has six programmable skew outputs and two zero skew outputs.
Skew is controlled by 3-level input signals that may be hard-wired to appropriate HIGH-MID-LOW levels.
FUNCTIONAL BLOCK DIAGRAM
G ND/sO E
Skew Select 3 3 1F1:0 V CCQ /PE Skew Select REF PLL FB 3 FS Skew Select 3 3 3F1:0 3 3 2F1:0
1Q 0 1Q 1
2Q 0 2Q 1
3Q 0 3Q 1
4Q 0 4Q 1
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
1
c 2001 Integrated Device Technology, Inc.
SEPTEMBER 2001
DSC 5844/1
IDT5993A PROGRAMMABLE SKEW PLL CLOCK DRIVER TURBOCLOCK
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
PIN CONFIGURATION
REF VCCQ FS 3F0 3F1 VCCQ/PE VCCN 4Q1 4Q0 GND 3Q1 3Q0 VCCN FB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 GND TEST 2F1 2F0 GND/sOE 1F1 1F0 VCCN 1Q0 1Q1 GND GND 2Q0 2Q1
ABSOLUTE MAXIMUM RATINGS(1)
Symbol VI TSTG Description Supply Voltage to Ground DC Input...
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