P2082A

October 2003

P2084A

rev 0.4

Alliance Semiconductor

2575, Augustine Drive

• Santa Clara, CA • Tel: 408.855.4900 • Fax: 408.855.4999 • www.alsc.com

Notice: The information in this document is subject to change without notice.

Low Cost Frequency Multiplier

Features

Generates 2X and 4X clocks of the input clock

frequency

Input clock frequency range from 3 MHz to 78 MHz

Provides up to:

P2082A: 156 MHz output clock frequency

P2084A: 312 MHz output clock frequency

External loop filter

Low cycle-to-cycle jitter

3.3 V operating voltage range

10 mA output drives

TTL or CMOS compatible outputs

Ultra-low power CMOS design

Available in industrial temperature range

(-25C to +85C)

Available in 8-pin SOIC and TSSOP

Product Description

The P2082A and P2084A are versatile frequency

multipliers that are designed specifically as cost effective

alternatives to the high precision frequency oscillator.

The P2082A/84A can generate a 2X and 4X output clock

respectively of the input frequency which allows system

cost savings by using an inexpensive crystal or resonator

to achieve high frequency multiplication.

The P2082A/84A provides up to 156 MHz and 312 MHz

output clock frequencies respectively through the use of the

Phase-Lock-Loop (PLL) technique which delivers low jitter

and high precision synthesized clocks.

Applications

The P2082A/84A is targeted towards the high frequency

CAN OSC replacement market. Applications include xDSL,

routers, networking, PC peripherals, and embedded

systems.

Block Diagram