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Smart Bluetooth

Anonymous
Not applicable

Hi all,

We want to layout a new board using the BCM20737 chip to complete part of our functions. However, we find it extremely difficult to purchase this chip.

I have contacted all the distributors of Broadcom (Mouser, Avnet, Macnica Americans). None of them have this chip in stock. Instead, they have BCM20737S and BCM20736S (48-pin, integrated with crystal etc.).

The BCM20737S (48-pin) has different footprint from BCM20737 (32-pin), also and we cannot find a detailed datasheet of BCM20737S.


So here are the weird things:

1. For the BCM20737 chip, we can find its datasheet from this community, but we cannot purchase it anywhere.

2. For the BCM20737S chip, we can purchase it easily, but we cannot get its datashee so we don't know how to layout.

I also contacted sales office of Broadcom, no one could help. The sale's manager from Mousers try to help me solve this issue. After one and a half hour trying, she gives up finally.

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1 Solution
MichaelF_56
Moderator
Moderator

Could you clarify that your intentions are to do a 20737 chip on board (32-pin), or SoC design as opposed to one that leverages the more integrated 20737S SIP module (48-pin)?

Datasheets for both:

BCM20737 SOC Data Sheet

BCM20737S Bluetooth Low Energy SiP Module Technical Reference

Do you realize that unless your annual volumes are 100K or more, the added cost of doing your own regulatory, adding additional components and doing an antenna design from scratch quickly negates the cost savings of the SoC?

This is why these are harder to find in stock at our distributors. The demand is lower based on the tradeoffs described.

You will want to engage with a full service distributor like Avnet or Macnica for SoC pricing.  They can help you with SIP module pricing as well, along with explain many of the tradeoffs of going with an SoC design compared to SIP module.

View solution in original post

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14 Replies
MichaelF_56
Moderator
Moderator

Could you clarify that your intentions are to do a 20737 chip on board (32-pin), or SoC design as opposed to one that leverages the more integrated 20737S SIP module (48-pin)?

Datasheets for both:

BCM20737 SOC Data Sheet

BCM20737S Bluetooth Low Energy SiP Module Technical Reference

Do you realize that unless your annual volumes are 100K or more, the added cost of doing your own regulatory, adding additional components and doing an antenna design from scratch quickly negates the cost savings of the SoC?

This is why these are harder to find in stock at our distributors. The demand is lower based on the tradeoffs described.

You will want to engage with a full service distributor like Avnet or Macnica for SoC pricing.  They can help you with SIP module pricing as well, along with explain many of the tradeoffs of going with an SoC design compared to SIP module.

View solution in original post

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Anonymous
Not applicable

Thank you.

We can use either BCM20737S or BCM20373, we just need the datasheet to help us do the layout. (I didn't find the BCM20737S's datasheet. Thanks for providing the link)

I understand the reason now why it is easy to purchase SIP module instead of SoC chip alone.

Thanks!

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MichaelF_56
Moderator
Moderator

Perfect.

Note that we also have alot of design files available on the site as well that you will find helpful.

If you go here: WICED Smart

Then look at the bottom box on the left called "Reference Designs", you will see that several of those designs leverage the SIP module.

Anonymous
Not applicable

Hi,mwf_mmfae

I notice that the BCM20737S Bluetooth Low Energy SiP Module Technical Reference is a Preliminary one.

Do you have a full released datasheet available now?

Thanks

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Anonymous
Not applicable

Thanks for your quick reply!

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MiTo_1583836
Contributor II

Hi Nolac

If you are located in the US or Canada, please contact me directly. We put together the Mpression board here: Odyssey MAX 10 FPGA & BLE Sensor Kit - Mpression with the BCM20737S.

We do have the chip in stock at Macnica!

We can provide support to get you up and running fast with your design on the HW and SW side.

Excellent videos are available here:

Bluetooth SMART Concepts IoT 1 vWorkshop - YouTube

Broadcom's WICED SMART SDK IoT 2 vWorkshop - YouTube

Video Link : 1229

It is covering all you need to get started on BLE with Broadcom.

jeremynigh

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Anonymous
Not applicable

Hi,

This technical reference seems to be BCM20732S, do you have BCM20737S version?

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Anonymous
Not applicable

We have purchased BCM20737S

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MichaelF_56
Moderator
Moderator

That's the device you want to use for new designs as it supports the newer A1 firmware and enhancements to the SDK.

The 20732S supports SDK 1.1 and A0 firmware, both of which are subsets of A1/SDK 2.x

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Anonymous
Not applicable

Am I correct thinking that 20737S does not support JTAG debugging?

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Anonymous
Not applicable

You can debug using PUART or J-Link probe, here is the document.

WICED Smart - Debugging Support Using a J-Link Probe Application Note

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MichaelF_56
Moderator
Moderator

The device does not support single step debugging.

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