TRU050-TELGB-40M0000000 datasheet, PDF

Datasheet> All Categories > Analog mixed-signal IC> The signal circuit> TRU050-TELGB-40M0000000

TRU050-TELGB-40M0000000: DescriptionPhase Locked Loop, CDIP16; CategoryAnalog mixed-signal IC The signal circuit; File Size427KB，14 Pages; ManufacturerMicrochip; Websitehttps://www.microchip.com; Environmental Compliance

Download Datasheet Parametric View All

TRU050-TELGB-40M0000000 Overview

Phase Locked Loop, CDIP16

TRU050-TELGB-40M0000000 Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Maker	Microchip
package instruction	SMD-16
Reach Compliance Code	compliant

Preview

Download Datasheet

View All

TRU050

Complete VCXO based Phase-Locked Loop

Features

•

Output Frequencies to 65.536 MHz

•

5.0 V or 3.3Vdc Operation

•

Tri-State Output

•

Holdover on Loss of Signal Alarm

•

VCXO with CMOS Outputs

•

0/70° or –40/85° Temperature Range

•

Ceramic SMD Package

•

RoHS/Lead Free Compliant Versions

The TRU050, VCXO based PLL

Description

The VI TRU050 is a user-configurable crystal-based

PLL integrated circuit. It includes a digital phase

detector, op-amp, VCXO and additional integrated

functions for use in digital synchronization

applications. Loop filter software is available as well

SPICE models for circuit simulation.

Applications

•

Frequency Translation

•

Clock Smoothing

•

NRZ Clock Recovery

•

DSLAM, ADM, ATM, Aggregation, Optical

Switching/Routing, Base Station

•

Low Jitter PLL’s

Figure 1. TRU050 Block Diagram

Vectron International, 267 Lowell Rd, Unit 102, Hudson NH 03051-4916

Page 1 of 14

Tel: 1-88-VECTRON-1

•

Web:

www.vectron.com

Rev:

4/12/2016

TRU050, VCXO Based PLL

TRU050 Theory of Operation

Phase Detector

The phase detector has two buffered inputs, DATAIN and CLKIN, which are designed to switch at 1.4 volts.

DATAIN is designed to accept an NRZ data stream but may also be used for clock signals which have about a

50% duty cycle. CLKIN is connected to OUT1 or OUT2, or a divided version of one of these outputs. CLKIN

and DATAIN and are protected by ESD diodes and should not exceed the power supply voltage or ground by

more than a few hundred millivolts.

The phase detector is basically a latched flip flop/exclusive-or gate/differential amplifier filter design to produce

a DC signal proportional to the phase between the CLKIN and DATAIN signals, see figure 4 for a block

diagram and figure 5 for a open loop transfer curve. This simplies the PLL design as the designer does not

have to filter narrow pulse signal to a DC level. Under locked conditions the rising edge CLKIN will be centered

in the middle of the DATAIN signal, see figure 6.

The phase detector gain is 0.53V/rad x data density for 5volt operation, and 0.35V/rad x data density for 3.3

volt operation. Data density = 1.0 for clock signals and is system dependent on coding and design for NRZ

signals, but 0.25 could be used as a starting point for data density.

The phase detector output is a DC signal for DATAIN frequencies greater than 1MHz but produces signficant

ripple when inputs are less than 200kHz. Additional filtering is required for low input frequency applications

such as 8kHz frequency translation, see figures 8 and 9.

Under closed loop conditions the active filter has a blocking capacitor which provides a very high DC gain, so

under normal locked conditions and input frequencies >1MHz, PHO will be about V

/2 and will not vary

signifigantly with changes in input frequency (within lock range). The control (voltage pin 1) will vary according

to the input frequency offset, but PHO will remain relatively constant.

Data In

(pin 7)

Clock In

(pin 9)

30 kΩ

20 kΩ

PHO

(pin 6)

Gain = 5 V / 2π

Gain = 2 / 3

Figure 4. Simplified Phase Detector Block Diagram

Vectron International, 267 Lowell Rd, Unit 102, Hudson NH 03051-4916

Page 4 of 14

Tel: 1-88-VECTRON-1

•

Web:

www.vectron.com

Rev:

4/12/2016

Recommended Resources

Diode selection plays a vital role in circuit design

STK4111II audio IC circuit diagram

555 voltage reversal circuit diagram

Low noise high precision current sink circuit diagram

Three-phase half-controlled bridge rectifier circuit

845E computer motherboard circuit diagram_31

Could you please help me check if the timing of 12864 is correct?: I used KEIL to write the 12864 driver. The control chip is LM3S811. The initialization was not successful. I checked the hardware several times and there was no problem. Please help me check if there ...; pupu Microcontroller MCU

High Accuracy Loop Powered 4mA to 20mA HART Modem: [size=5]This reference design provides a solution for loop-powered, high-accuracy field (sensor) transmitters using a HART modem. This design uses some discrete 4mA to 20mA current transmitters, a HAR...; Jacktang Analogue and Mixed Signal

I would like to ask you about the Bluetooth OTA upgrade part: Because I know very little about this, I feel very strenuous. I have a few simple doubts that I hope the experts can answer. 1. Should the firmware burned into the board be a HEX file or a Bin file? 2...; WZH70246 MEMS sensors

Electrolytic capacitors and chip capacitors?: When using electrolytic capacitors and chip capacitors in parallel to filter IC, which capacitor should be closer to the IC power pin?...; sanlin1997 Discrete Device

Can DSP read and write files?: There are always problems when reading and writing DSP files. I used this program to test the reading of files, but I don't know what it reads. I use ccs3.1 and the DSP is 6713. The program is as foll...; lodavs DSP and ARM Processors

Embedded issues (linux): The error reported is as follows: Group 0 should NOT be in USER state!; Waiting for reply online!...; maihy1985 Linux and Android

Shortcut: A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 AA AB AC AD AE AF AG AH AI AJ AK AL AM AN AO AP AQ AR AS AT AU AV AW AX AY AZ B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 BA BB BC BD BE BF BG BH BI BJ BK BL BM BN BO BP BQ BR BS BT BU BV BW BX BY BZ C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 CA CB CC CD CE CF CG CH CI CJ CK CL CM CN CO CP CQ CR CS CT CU CV CW CX CY CZ D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 DA DB DC DD DE DF DG DH DI DJ DK DL DM DN DO DP DQ DR DS DT DU DV DW DX DZ

Popular Components