LMX2326TM/NOPB

Differential - Input:Output:	No/No
Base Part Number:	LMX2326
Supplier Device Package:	16-TSSOP
Package / Case:	16-TSSOP (0.173", 4.40mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Voltage - Supply:	2.3 V ~ 5.5 V
Divider/Multiplier:	Yes/No
Frequency - Max:	2.8GHz
Series:	PLLatinum™
Ratio - Input:Output:	2:1
Number of Circuits:	1
Output:	CMOS
Input:	CMOS
PLL:	Yes
Type:	PLL Frequency Synthesizer
Part Status:	Obsolete
Packaging:	Tube

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Introduction

The LMX2326TM/NOPB is a Low Power Quad-PLL/Dual-Frequency Synthesizer designed for a wide range of timing applications. It offers unprecedented levels of integration, programmability, flexibility, high performance, and features to meet customer’s system-level needs.

Applications

The LMX2326TM/NOPB is well suited for both wireless and wireline applications. It can provide customers with a versatile, small-footprint solution for use in synchronizing a variety of systems that require multiple timing clock generation and synchronization. Examples include:

• Wireline Networks – synchronizing supporting infrastructure, including cable modems, DSL, base stations, repeaters, switches, routers, and line cards.
• Wireless Networks – synchronizing cellular base station and transport infrastructure.
• Wireless Personal Area Networks – synchronizing Bluetooth with other wireless networks.
• Corporate Networks – network access nodes, switches, routers and other infrastructure.
• Home Networks – synchronized video, audio, data and other streaming media.
• Automotive Networks – cellular base stations and other components for in-vehicle networks.
• Digital Video Recorders (DVRs) – synchronizing AV signals.
• Television Broadcast Applications – synchronized broadcast of digital television content.

Features

The LMX2326TM/NOPB offers a flexible configuration with the following features:

• Low power consumption - only 1.8 mA.
• Wide range output frequency - 1MHz to 700MHz.
• Programmable divider ranges.
• Simple 3-wire SPI serial control port.
• Four integrated phase-locked loops (PLLs).
• Output release detection and reset capability.
• Fully integrated master oscillator - no external components required.
• Built-in fract/integer division for improved frequency accuracy.
• PLL time-to-lock reduced to 1 ms.
• Multi-synth mode with pre-loaded output frequency registers.

Working Principle

The LMX2326TM/NOPB is a low power quad-integrated PLL/dual-frequency synthesizer device that operates off of a single 3.3V supply. It features four programmable PLLs, two memory registers, a low-power oscillator, and a three-wire serial port interface.The device features four programmable PLLs, three of which are used to generate output clocks while the fourth PLL is a reference clock used to synchronize the remaining three. The device also includes two selectable, programmable frequency registers. Each of the frequency registers can be used to store a single frequency value, to which the output clock is synchronized.The oscillator, PLLs and frequency registers interact to enable the output distribution of frequency-x, frequency-y and then frequency-x again. This process is repeated over and over again. The device also features a timing locked loop (TLL) which is used to detect and maintain the output frequency accuracy by locking it to a reference clock. The device is also programmable via a three-wire serial interface, allowing users to control the output frequency with a minimal amount of circuitry. The LMX2326TM/NOPB also features a power-down mode which significantly reduces power consumption.

Conclusion

The LMX2326TM/NOPB is a low power quad-PLL/dual-frequency synthesizer designed for a wide range of timing applications. Its small footprint, high performance, and integrated features make it an ideal solution for synchronizing systems that require multiple timing clocks. Additionally, its programmability via the three-wire serial port interface provides users with an easy means of controlling and synchronizing a variety of clocks.

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