Some general comments:
1) Review the SOCAY website to find a suitable USB 2.0 fit for ESD and/or EMI filter options. They have higher capacitance, lower cost options with fewer channels of protection for USB 2.0 HS / LS support. As noted, the costs will be lower but for us, the small delta in cost is usually worth the extra expense so we can continue to use the same SKU on our pending USB 3.x designs.
http://www.socay.com
2) DO NOT single source any such parts. Always be on the search of at least one other vendor who can offer the same footprint for same fit, form and function. This way, you can always start with a local supplier (higher premium on cost due to lower volume buys) and then migrate to the T&R MOQ quantities of typically 3k pieces per T&R. Suspecting the USB 2.0 device will be under $ 0.04 USD each.
Most recent Socay contact (met with them a few weeks back in HK): Daisy
socay017@socay.com <
socay017@socay.com>
Email them any details and spec and they can cross to their p/n with datasheet for confirmation.
3) To kick up your design, consider the use of the EMI filters for USB 2.0 use. Socay has many models to choose from and shipping from Shenzhen is quite simple and relatively low cost. We have sourced some EMI filters (common mode chokes), direct from another manufacturer for our pending USB 3.x designs and that is Kingcore (Taiwan).
Last contact we have on file is: Rex Chen
King Core Electronics Inc.
O.Phone: +886-3-4698855#201
e-mail:
rex@mail.kingcore.com.tw
They offer true drop in and spec equivalents to the major common mode choke manufacturers at a much reduced BOM cost for USB 2.0 and USB 3.x.
FYI: P/N WCM-2012-900T ; for USB 2.0 High Speed use
Comparing to Inpaq MCM2012B900GBE
KC p/n.WCM-2012-900T
Price USD0.04/pc FOB Taiwan
SPQ=3000pcs/reel
You will have to review the landed cost of the same to your location to see if this is a fit.
4) Try to consolidate your BOM to limit the number of parts to be placed on the PCB during assembly. The assembly fees are usually higher than the cost of the part you are placing. For this reason, we always tweak the design for manufacturing including the use of resistor networks (1206) vs. single resistors (0402). From our last review, 0402 SMD parts are the lowest cost for despike (ie. 0.1uf, etc.) - Samsung appears to be the winner most of the time we price exercise. Be very cautious of the capacitance vs. voltage of operation vs. package size. There is a relationship between these 3 values and how they will impact the true capacitance for your end project.
Here is another post of this discussion that started it all:
https://www.maximintegrated.com/en/app- ... vp/id/5527
* must read for any circuit designer
5) Avoid HASL plating on your PCB unless building by hand is a no-care. The landing pads will not be as flat (coplanar) as can be for the finer parts. ENIG finish is recommended with gold plating. ROHS and conflict of minerals compliance is a must. Halogen free PCB is recommended and is the norm for the larger OEM accounts we supply.
6) Rather than continue to ramble - post back if you need any help on other parts, PCB guidance, etc. and will try to assist where we can. Have been to Asia many times and feel comfortable with most of the suppliers we have used over the years. Not all are equal as some are just some and mirrors - promise one quality and deliver another.