PLL501-21 Datasheet, PDF (1/5 Pages) PhaseLink Corporation – VCXO Clock Generator IC

FEATURES
• On-chip tunable voltage-controlled crystal
oscillator circuitry (VCXO) allows precise system
frequency tuning (pull range 200ppm minimum).
• VCXO tuning range: 0-3.3V.
• Uses inexpensive fundamental-mode crystals.
• Integrated phase-locked loop (PLL) multiplies
VCXO frequency to the higher system
frequencies needed.
• 3.3V supply voltage.
• Small circuit board footprint (8-pin 0.150’’ SOIC).
• Custom frequency selections available.
• 12mA output drives capability at TTL level.
DESCRIPTIONS
The PLL501-21/23 is a monolithic low Jitter, high
performance CMOS clock generator IC. It has a
circuitry that implements a voltage-controlled crystal
oscillator when an external resonator (nominally
13.5MHz) is attached. The VCXO allows device
frequencies to be precisely adjusted for matching
requirements.
This product is ideal for Set-Top Box and multimedia
synthesizer applications.
BLOCK DIAGRAM
PLL501-21/23
VCXO Clock Generator IC
PIN CONFIGURATION
XIN 1
VDD 2
VIN 3
GND 4
8 XOUT
7 GND
6 VDD
5 CLK
Table 1: Crystal / Output Frequencies
DEVICE
PLL501-21
PLL501-23
FXIN (MHz)
13.5
13.5
CLK (MHz)
27
54
Note: Contact PhaseLink for custom PLL Frequencies
XIN
XOUT
VIN
VCXO
PLL
Output
Buffer
CLK
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Rev 01/15/01 Page 1