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1/18 www.rohm.com 2011.08 - rev.b ? 2011 rohm co., ltd. all rights reserved. video accessory ics high performance vcos for image sampling bu2373fv,bu2374fv description general-purpose vco series ics (bu2373fv and bu2374fv) have a built-in vco and phase comparator and facilitate the configuration of a pll system through the exte rnal connection of a lpf and frequency divider. furthermore, in order to facilitate the loop constant settings of the pll system, the application manual has been enhanced to ensure studies on the application. features 1) the vco enables midpoint settings within the rang e of oscillation through the external resistance. 2) the rising edge trigger type of phase comparator is built in. 3) power-down mode setting can be made indepen dently with the vco and the phase comparator. 4) the vco output frequency division c an be selected on the select pin. 5) compact ssop-b14 package is adopted. applications crt, lcd monitor, and cd-rw line up matrix bu2373fv bu2374fv supply voltage vdd=3.0v vdd=3.3v vdd=5.0v frequency range vdd=3.0v 37 60mhz vdd=3.3v 37 65mhz 37 60mhz vdd=5.0v 43 100mhz vco-frequency dividing mode 1/2 1/4 operating temperature range -20 75 -20 75 package ssop-b14 ssop-b14 absolute maximum ratings (ta=25 ) symbol ratings unit supply voltage vdd -0.5 7.0 v input voltage vin -0.5 vdd+0.5 v storage temperature range ts t g - 3 0 125 power dissipation pd 400 mw *1 operating is not guaranteed. *2 in the case of exceeding ta = 25 , 4.0mw should be reduced per 1 . *3 the radiation-resistance design is not carried out. *4 power dissipation is measured when the ic is mounted to the pr inted circuit board. no.11069ebt07
technical note 2/18 www.rohm.com 2011.08 - rev.b ? 2011 rohm co., ltd. all rights reserved. bu2373fv,bu2374fv ? ? ? ? ? ?
technical note 3/18 www.rohm.com 2011.08 - rev.b ? 2011 rohm co., ltd. all rights reserved. bu2373fv,bu2374fv ?
technical note 4/18 www.rohm.com 2011.08 - rev.b ? 2011 rohm co., ltd. all rights reserved. bu2373fv,bu2374fv 45 46 47 48 49 50 51 52 53 54 55 - 25 0 25 50 75 100 temperature ?
technical note 5/18 www.rohm.com 2011.08 - rev.b ? 2011 rohm co., ltd. all rights reserved. bu2373fv,bu2374fv 0 20 40 60 80 100 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 control voltage
technical note 6/18 www.rohm.com 2011.08 - rev.b ? 2011 rohm co., ltd. all rights reserved. bu2373fv,bu2374fv 0 5 10 15 20 25 30 35 40 45 50 55 60 output freq uency b
technical note 7/18 www.rohm.com 2011.08 - rev.b ? 2011 rohm co., ltd. all rights reserved. bu2373fv,bu2374fv 0 5 10 15 20 25 30 35 40 45 50 35 40 45 50 55 60 freq uency: f[mhz] frequency sensitivity: ?1[mhz/v ] 0 5 10 15 20 25 2.0 2.2 2.4 2.6 2.8 3.0 resistor :rbias[ko] output fr equency ? ? ? ? ? ?
technical note 8/18 www.rohm.com 2011.08 - rev.b ? 2011 rohm co., ltd. all rights reserved. bu2373fv,bu2374fv
technical note 9/18 www.rohm.com 2011.08 - rev.b ? 2011 rohm co., ltd. all rights reserved. bu2373fv,bu2374fv fin_ a pfd_out pfd_inhibit bias vco_in vco_inhibit fin_ a pfd_out pfd_inhibit bias vco_in vco_inhibit
technical note 10/18 www.rohm.com 2011.08 - rev.b ? 2011 rohm co., ltd. all rights reserved. bu2373fv,bu2374fv
technical note 11/18 www.rohm.com 2011.08 - rev.b ? 2011 rohm co., ltd. all rights reserved. bu2373fv,bu2374fv ? ?
technical note 12/18 www.rohm.com 2011.08 - rev.b ? 2011 rohm co., ltd. all rights reserved. bu2373fv,bu2374fv ? ? ?
technical note 13/18 www.rohm.com 2011.08 - rev.b ? 2011 rohm co., ltd. all rights reserved. bu2373fv,bu2374fv (functioning of pll system) in order to configure the stable pll system, the followin g section describes the functi onal principle, open loop characteristics, and closed loop characteristic s by block shown in the block diagram below. ? ? ? ? ? ? ? i o
technical note 14/18 www.rohm.com 2011.08 - rev.b ? 2011 rohm co., ltd. all rights reserved. bu2373fv,bu2374fv for the lag-lead filter afore- mentioned, assuming that c1 ?? ? /4 /2 ? ? ? ? ? ? ? ? ( ? ? ? ? ? ? ? , ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
technical note 15/18 www.rohm.com 2011.08 - rev.b ? 2011 rohm co., ltd. all rights reserved. bu2373fv,bu2374fv ? /4 /2 /4 /2 ? ? ? ? ? ? ? ? ? ? ? ? ? , ? ? , ? ? ? ? , ? ? , ? ? ? ? ? ? ?
technical note 16/18 www.rohm.com 2011.08 - rev.b ? 2011 rohm co., ltd. all rights reserved. bu2373fv,bu2374fv ? ? ? ? ? ? ? /2 ? ? , , ? ?
technical note 17/18 www.rohm.com 2011.08 - rev.b ? 2011 rohm co., ltd. all rights reserved. bu2373fv,bu2374fv
technical note 18/18 www.rohm.com 2011.08 - rev.b ? 2011 rohm co., ltd. all rights reserved. bu2373fv,bu2374fv ? order quantity needs to be multiple of the minimum quantity. embossed carrier tape tape quantity direction of feed the direction is the 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand 2500pcs e2 () direction of feed reel 1pin (unit : mm) ssop-b14 8 7 14 1 0.10 6.4 0.3 4.4 0.2 5.0 0.2 0.22 0.1 1.15 0.1 0.65 0.15 0.1 0.3min. 0.1
r1120 a www.rohm.com ? 2011 rohm co., ltd. all rights reserved. notice rohm customer support system http://www.rohm.com/contact/ thank you for your accessing to rohm product informations. more detail product informations and catalogs are available, please contact us. notes no copying or reproduction of this document, in part or in whole, is permitted without the consent of rohm co.,ltd. the content specied herein is subject to change for improvement without notice. the content specied herein is for the purpose of introducing rohm's products (hereinafter "products"). if you wish to use any such product, please be sure to refer to the specications, which can be obtained from rohm upon request. examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the products. the peripheral conditions must be taken into account when designing circuits for mass production. great care was taken in ensuring the accuracy of the information specied in this document. however, should you incur any damage arising from any inaccuracy or misprint of such information, rohm shall bear no responsibility for such damage. the technical information specied herein is intended only to show the typical functions of and examples of application circuits for the produc ts. rohm does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by rohm and other parties. rohm shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. the products specied in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, ofce-automation equipment, commu- nication devices, electronic appliances and amusement devices). the products specied in this document are not designed to be radiation tolerant. while rohm always makes efforts to enhance the quality and reliability of its products, a product may fail or malfunction for a variety of reasons. please be sure to implement in your equipment using the products safety measures to guard against the possibility of physical injury, re or any other damage caused in the event of the failure of any product, such as derating, redundancy, re control and fail-safe designs. rohm shall bear no responsibility whatsoever for your use of any product outside of the prescribed scope or not in accordance with the instruction manual. the products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuel- controller or other safety device). rohm shall bear no responsibility in any way for use of any of the products for the above special purposes. if a product is intended to be used for any such special purpose, please contact a rohm sales representative before purchasing. if you intend to export or ship overseas any product or technology specied herein that may be controlled under the foreign exchange and the foreign trade law, you will be required to obtain a license or permit under the law.

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