Specification	CDCE421ARGER

Differential - Input:Output	No/Yes
Frequency - Max [Max]	1.2 GHz
Input	LVCMOS, Crystal
Mounting Type	Surface Mount
Number of Circuits	1
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Output	LVPECL, LVDS
Package / Case	24-VFQFN Exposed Pad
PLL	True
Ratio - Input:Output [custom]	1:1
Supplier Device Package	24-VQFN (4x4)
Type	Clock Generator
Voltage - Supply [Max]	3.6 V
Voltage - Supply [Min]	3 V

CDCE421A Series

Fully integrated wide range low-jitter crystal oscillator clock generator

Part	Voltage - Supply [Max]	Voltage - Supply [Min]	Number of Circuits	Input	Mounting Type	Output	Operating Temperature [Max]	Operating Temperature [Min]	Frequency - Max [Max]	Ratio - Input:Output [custom]	Type	Differential - Input:Output	Supplier Device Package	Package / Case	Divider/Multiplier
Texas Instruments CDCE421ARGET	3.6 V	3 V	1	Crystal LVCMOS	Surface Mount	LVDS LVPECL	85 °C	-40 °C	1.2 GHz	1:1	Clock Generator	No/Yes	24-VQFN (4x4)	24-VFQFN Exposed Pad
Texas Instruments CDCE431YS	3.6 V	3 V	1	Crystal LVCMOS	Surface Mount	LVDS LVPECL	85 °C	-40 °C	1.2 GHz	1:1	Clock Generator	No/Yes	Wafersale	Die	Yes/No
Texas Instruments CDCE421YS	3.6 V	3 V	1	Crystal LVCMOS	Surface Mount	LVDS LVPECL	85 °C	-40 °C	1.2 GHz	1:1	Clock Generator	No/Yes	Wafersale	Die	Yes/No
Texas Instruments CDCE421RGER	3.6 V	3 V	1	Crystal LVCMOS	Surface Mount	LVDS LVPECL	85 °C	-40 °C	1.2 GHz	1:1	Clock Generator	No/Yes	24-VQFN (4x4)	24-VFQFN Exposed Pad	Yes/No
Texas Instruments CDCE421RGET	3.6 V	3 V	1	Crystal LVCMOS	Surface Mount	LVDS LVPECL	85 °C	-40 °C	1.2 GHz	1:1	Clock Generator	No/Yes	24-VQFN (4x4)	24-VFQFN Exposed Pad	Yes/No
Texas Instruments CDCE431Y	3.6 V	3 V	1	Crystal LVCMOS	Surface Mount	LVDS LVPECL	85 °C	-40 °C	1.2 GHz	1:1	Clock Generator	No/Yes	Diesale	Die	Yes/No
Texas Instruments CDCE421ARGER	3.6 V	3 V	1	Crystal LVCMOS	Surface Mount	LVDS LVPECL	85 °C	-40 °C	1.2 GHz	1:1	Clock Generator	No/Yes	24-VQFN (4x4)	24-VFQFN Exposed Pad

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tape & Reel (TR)	3000	$ 7.96
Texas Instruments	LARGE T&R	1	$ 10.23
		100	$ 8.93
		250	$ 6.89
		1000	$ 6.16

Description

General part information

CDCE421A Series

The CDCE421A is a high-performance, low phase noise clock generator. It has two fully-integrated, low-noise, LC-based voltage-controlled oscillators (VCOs) that operate in the 1.750-GHz to 2.350-GHz frequency range. It also features an integrated crystal oscillator that operates in conjunction with an external AT-cut crystal to produce a stable frequency reference for the phase-locked loop (PLL) based frequency synthesizer.

The output frequency (fOUT) is proportional to the frequency of the input crystal (fXTAL). The prescaler divider, feedback divider, output divider, and VCO selection set the output frequency with respect to fXTAL.

In the CDCE421A, the feedback divider is set automatically with respect to the prescaler setting. The product of the prescaler and the feedback divider should be between 60 and 64 as shown in to maintain a stable control loop.

Documents

Technical documentation and resources

CDCE421AEVM User Guide

EVM User's guide

CDCE421A datasheet

Data sheet