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Integrated Circuits(HKTDC Electronic Components & Parts, Vol 02,2006)

Tried & Tested

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Wing Shing Computer Components Co (HK) Ltd's products include a series of Static Random Access Memory (SRAM) ICs, which are made with lead-free materials sourced from the Chinese mainland

Computers, communication devices and a plethora of consumer electronic products are almost indispensable parts of modern life, and the many products that this includes could not work without the aid of the integrated circuits (ICs) supplied by Hong Kong manufacturers.

One such supplier is Wing Shing Computer Components Co (HK) Ltd, whose products include a series of Static Random Access Memory (SRAM) ICs operating at 4.5-5.5 volts and at temperatures of 0℃-70℃ at a speed of 70ns.

"These ICs are made from silicon, plastic and metal sourced from the Chinese mainland and Malaysia. All the materials are lead-free, and our products are environmentally friendly. They are also of good quality and their performance is highly stable," says managing director Lin Kwok Hung. "FOB Hong Kong unit prices for items in this series are HK$3-10," he adds.

Founded in 1984, Wing Shing markets its ICs under the WS brand name and accepts minimum orders of 1,000 units for delivery 1-2 weeks after order confirmation.

"Electronics manufacturers on the mainland form our biggest market, but we also export to other parts of the world such as North and South America and India," says Lin. "Customers include traders and manufacturers of consumer products such as telephones and computers."

More involved in the distribution of ICs is Silicon (HK) Ltd, which was established in 1995. The firm, which claims an annual turnover of about US$15m, markets a wide selection of ICs from various sources.

"For example, model CD665CB is from a mainland manufacturer," says assistant sales manager Kelvin Wong. "This particular model needs few peripheral components as the circuit configuration is quite simple. Also, as the IC dice is of mainland origin, the unit price is highly competitive at about US$0.175 FOB Hong Kong."

In addition to mainland manufacturers, Silicon distributes ICs from Japan, Korea and Europe. The lead time is 1-7 days from receipt of order depending on the model.

"Our main market is the mainland, but we also sell to Hong Kong, Europe and North and South America," Wong says. "We also provide high-quality technical support and prompt delivery service."

D&K Technologies Ltd, established in 2003, also trades in ICs and various other electronic components. "We source any kind of IC for our clients to meet their specific needs," says managing director Danny Kwan, "and we also purchase electronic components inventory from worldwide manufacturers in both new and used condition."

D&K's strong brands include International Rectifiers, SGS Thomson, Philips, Atmel and Texas Instruments. D&K's stock is varied. A typical example is model BC857C from Philips Semiconductor. "This IC is used for general-purpose switching and amplification in mobile phones, or for digital still cameras and MP3 players. It operates at low current levels (100mA maximum) and low voltage levels (65V maximum)," Kwan says.

The firm's markets are worldwide, but the mainland presently accounts for more than 50% of demand. "We are planning to expand our presence on the mainland to meet the growing demand," Kwan says.

Weltronics Component Ltd also attaches great importance to the mainland, and has offices in Beijing, Shanghai, Chengdu, Xiamen, Guangzhou and Shenzhen.

"Our major markets are the mainland and Hong Kong, but we also sell to other places like Taiwan," says sales manager (semiconductor) Davy Ho.

Weltronics is a manufacturer, and recently launched a Ground Fault Interrupter Earth Leakage Current Detector (model IL54123D). "This IC cuts off the AC supply whenever it detects any power leakage," Ho explains. "It can be put in power strips, electronic circuits or controller boards in electrical appliances such as washing machines and refrigerators."

Ho says the item also contains a pre-regulator, a main regulator, an after-regulator, a differential amplifier, a level comparator, and a latch circuit. "It has low power consumption (5mW at 100/200V), a high input sensitivity and noise immunity, a large surge margin and a wide operating temperature range (-40蚓 to 85蚓)."

The IC has minimum external parts and meets UL 943 standards. "The silicon wafers come from Korea and the unit price for the finished IC is about HK$3 FOB Hong Kong for a minimum order of about 5,000 units," Ho says.

"We produce more than 1,000 different ICs and average about 100,000 units per model per month," Ho says of the 22-year-old enterprise.

"All our ICs comply with RoHS," he stresses, referring to the EU directive on the restriction of the use of certain hazardous substances in electrical and electronic equipment, "and orders are delivered 4-6 weeks after confirmation."

Clearly, Hong Kong manufacturers and traders supply a full range of ICs to satisfy the different market needs, and buyers are assured of finding items that meet any requirement.

WRITTEN BY LIZA LEE

Contact Details

Bowin Electronic Co
Unit 10, 11/F,
Harry Ind Bldg
49-51 Au Pui Wan St, Fotan
New Territories, Hong Kong
Tel: 852-2631-7036
Fax: 852-2643-9503
Email: 
bowinele@netvigator.com
Web: www.bowin-ic.com.hk

Chi Shing Trading Co
Rm 1821, Grandtech Centre
8 On Ping St,
Siu Lek Yuen, Shatin
New Territories, Hong Kong
Tel: 852-2362-0188
Fax: 852-2144-6328
Email: 
yss87@yahoo.com.hk
Web: www.srtd.net

D&K Technologies Ltd
Rm 1409, Cheung Fung Ind Bldg
23-39 Pak Tin Par St,
Tsuen Wan
New Territories, Hong Kong
Tel: 852-2498-7368
Fax: 852-2490-0883
Email: 
danny@dkhkg.com
Web: www.dkhkg.com

Silicon (HK) Ltd
Units 371-374, Sino Ind Plaza
9 Kai Cheung Rd,
Kowloon Bay Kowloon, Hong Kong
Tel: 852-2331-9328
Fax: 852-2796-5030
Email: 
sales@silicongroup.net
Web: www.silicongroup.net

Weltronics Component Ltd
Rms 1101-2, Tower I
Cheung Sha Wan Plaza
833 Cheung Sha Wan Rd
Cheung Sha Wan, Kowloon
Hong Kong
Tel: 852-2410-0623
Fax: 852-2410-0920
Email: 
inquiry@weltronics.com
Web: www.weltronics.com

Wing Shing Computer Components Co (HK) Ltd
Unit E, 9/F, Lladro Centre
72 Hoi Yuen Rd, Kwun Tong
Kowloon, Hong Kong
Tel: 852-2341-9276
Fax: 852-2797-8896
Email: 
ic@wingshing.com
Web: www.wingshing.com