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Description

The U4256BM is especially designed for AM up/down converter systems, together with the tuner U4255BM. Due to the integrated DACs, an automatic tuner alignment is possible. All the functions of the U4256BM can be software controlled via a serial 3-wire bus, consisting of Enable, Clock and Data. The format and procedure for the data transfer from the microcontroller is shown in figures 3, 4 and table Data Transfer. All requested data have to be transferred via 16-bit or 24-bit commands. Due to the 8-bit structure, the serial output interface of a microcontroller can be used for the data transfer. The PLL functions can be controlled by 24-bit commands, while the alignment functions are controlled by 16-bit commands. The alignment function control normally is set once by switching on the tuner. Then the tuner automatically will be aligned. The data for alignment are stored in a separate EPROM. Via integrated capacitors it is possible to tune the reference oscillator (this function is controlled via the 3-wire bus).

Features

RF data processing Servo signal processing Servo signal path set-up Focus servo Radial servo Differential phase detection Drop-out concealment Push-pull and three-beam push-pull Enhanced push-pull (dynamic offset compensation for beam landing) Offset compensation Automatic dual laser supply Power-on reset and general power on Compatibility with TZA1033HL/V1 Software compatibility Hardware compatibility Interface to the system controller Control registers Register 0: power control Register 1: servo and RF modes Register 2: focus offset DAC Register 3: RF path gain Register 4: RF left and right, or sum offset compensation Register 5: RF sum offset compensation Register 6: servo gain and dynamic radial offset compensation factor Register 7: servo path gain and bandwidth and RF path bandwidth and pre-emphasis Register 8: RF channel selection Register 11: radial servo offset cancellation Register 12: central servo offset cancellation inputs A and B Register 13: central servo offset cancellation inputs C and D Register 14: RF filter settings Register 15: DPD filter settings

Supplier

F3415S

Vendor: IR Pack: TO-263D/C: 04+Qty: 38000Note: New in original, stock offer

TONGGUANG (H.K.) ELECTRICS CO., LIMITED   China (Mainland)

TONGGUANG (H.K.) Electrics Co., Limited has always had the faith in its mind, which are mutual benefit, sincerity, and customer first, since its establishment. We also want to have a development which is based one Hong Kong, facing TaiWan, Austrlia and so on for we want to positively develop domestically and outside the broad market. What' more, we still strive to obtaining the customers' co...

Contact: Mr.james

Adddate: 2014-11-26

F3415S

Vendor: IR Pack: TO-263D/C: 05+Qty: 38000Note: New in orginal, stock offer.

WEIHAO ELECTRONICS (H.K) CO., LIMITED   China (Mainland)

Wei Hao Electronic specilizes in AD, BB/TI, MAX, TOS and LT. We can give you preferential price and high quality IC parts.

Contact: Mr.minkin Zhou

Adddate: 2014-11-26

F3415S449

Yinke(HK)ELECTRONIC COMPANY LTD   China (Mainland)

we are professionally offer many kinds of electronic components ,such as:ics,semicounductors,connectors,diode,audions....etc. if you have any inquiry ,please feel free send mail to me ,i will offer the best competitive price asap.

Contact: Ms.Tina zhang

Adddate: 2014-11-26

F34-030-210-AGGAA

Vendor: MITSUMID/C: 08+Qty: 10000

HuaZhu Technology (INT'L) Limited   China (Mainland)

HuaZhu Technology(INT,L) Limited is one of the largest distributor in electronic components, in specialized in various IC components produced by the famous manufacturers in Europe and USA. After a period of development, our company has her branch account not only in Shenzhen SEG Electronics Market but in prosperous Huaqiang Electronics World as well. Under our efforts, Huazhu Electronics Co., Lt...

Contact: Ms.katy xie

Adddate: 2014-11-26

F34077.010052A2

Pack: BGAQty: 1

ShenZhen HYC Electronic Technology CO.,LTD   China (Mainland)

Supply any kinds of brands of ICs.Merchandise on hand,large quantity stocks,High quality,lower price ,Original Binding. Suchas,Xilinx,AlteraROHM,TOSHIBA,PHILIP,ON,TI,ST,MAX,ATMEL,VISHAY,TYCO,HOLTEK and so on.

Contact: Ms.julie Yuan

Adddate: 2014-11-26

F34077.010052A2

Vendor: N/A Pack: 50D/C: N/AQty: BGA

Yusheng Electronics (hk) limited   China (Mainland)

We are an independent and honest distributor of all brands of ICs, such as MAX, AD, ALTERA, XILIX, ST, NS, MOT, FSC, AMD, XICOR, and so on. Our basic principle is BEST, FAST and RELIABLE, Which means BEST PRICE, FAST QUOTATION and RELIABLE REPUTATION, BEST SERVICE, FAST SHIPPMENT and RELIABLE QUALITY!

Contact: Ms.hezzle hao

Adddate: 2014-11-26

F341

Pack: BGAQty: 1033Note: original,in stock"

AMASS ELETRONICS LIMITED   China (Mainland)

The Master said:Is it not delightful to have friends coming from distant quarters? Amass was established in 1999, Distribution inHong Kong, Shenzhen, Shanghai, the three major economically developed regions. Since the establishment of the company, Through unremitting efforts to expand,continue to grow and develop, it has become a strength of the domestic electronic components distributors and ...

Contact: Ms.tina hou

Adddate: 2014-11-26

F3415S

Vendor: IR Pack: TO-263D/C: 04+Qty: 38000Note: New in original, stock offer

TONGGUANG (H.K.) ELECTRICS CO., LIMITED   China (Mainland)

TONGGUANG (H.K.) Electrics Co., Limited has always had the faith in its mind, which are mutual benefit, sincerity, and customer first, since its establishment. We also want to have a development which is based one Hong Kong, facing TaiWan, Austrlia and so on for we want to positively develop domestically and outside the broad market. What' more, we still strive to obtaining the customers' co...

Contact: Mr.james

Adddate: 2014-11-26

F3415S

Vendor: IR Pack: TO-263D/C: 05+Qty: 38000Note: New in orginal, stock offer.

WEIHAO ELECTRONICS (H.K) CO., LIMITED   China (Mainland)

Wei Hao Electronic specilizes in AD, BB/TI, MAX, TOS and LT. We can give you preferential price and high quality IC parts.

Contact: Mr.minkin Zhou

Adddate: 2014-11-26

F3415S

Vendor:IRPackage Cooled:TO-263D/C:05+

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F347ZW1/X7088

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