ICS3727XP

Features:

• ICS3727XP offers 24 to 36 MHz output frequency range (output frequency = 2x crystal frequency) and improved power supply noise rejection
• Uses an inexpensive 12 to 18 MHz external crystal
• Ideal for DV CODEC applications using 27 MHz external pullable crystal with extended pull range to generate locked 27 MHz clock transport video clock
• On-chip VCXO with guaranteed pull range of ±200 ppm minimum
• VCXO input tuning voltage 0 to 3.3 V
• Packaged in 8-pin SOIC (150 mil wide)

Specifications

Stresses above the ratings listed below can cause permanent damage to the ICS3727XP. These ratings,which are standard values for ICS commercially rated parts, are stress ratings only. Functional operation of the device at these or any other conditions above those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods can affect product reliability. Electrical parameters are guaranteed only over the recommended operating temperature range.

Item	Rating
Supply Voltage, VDD	7 V
All Inputs and Outputs	-0.5 V to VDD+0.5 V
Ambient Operating Temperature	0 to +70
Storage Temperature	-65 to +150
Soldering Temperature	260

Description

The ICS3727XP combines the functions of a VCXO (Voltage Controlled Crystal Oscillator) and PLL (Phase-Locked Loop) frequency doubler onto a single chip. It is designed primarily for data and clock recovery applications within end products such as set-top box receivers.

The ICS3727XP exhibits a moderate VCXO gain of 200 ppm/V typical, when used with a high quality external pullable quartz crystal.

The frequency of the on-chip VCXO of the ICS3727XP is adjusted by an external control voltage input into pin VIN. Because VIN is a high impedance input, it can be driven directly from an PWM RC integrator circuit. Frequency output increases with VIN voltage input. The usable range of VIN is 0 to 3.3 V.