What happened to all the Low Power Sub 200MHz FM ICs?

[labnet]

I have a commercial product currently using the now obsolete Melexsis TH7122.1 for a 13.5MHz receiver.

My requirements are 100kbit BW(2FSK with +-30kHz deviation), <150uS from sleep to RX RSSI out, operate from 2.7v to 3.3v @ < 10mA, -100dBm sensitivity.
It seems all the semi integrated FM receiver chips that can work sub 180MHz are now gone.

I've cheked out

Chip	Maker	Issue
SA615	NXP	Discontinued
TH7122	Melexis	Discontinued
Si407x	Skyworks	Commercial FM Only. Only 15kHz BW Out
Si48xx	Skyworks	Commercial FM Only. Only 15kHz BW Out
TEF665X	NXP	$$ and >100mA
SAF3600	NXP	$$ and > 500mA
CC series	TI	Only >180MHz
AX5043	OnSemi	Discontinued

I know I can build a receiver discretely, but its a lot more work, expense and board real estate. Any suggestions?

[rsjsouza]

You can find several 13MHz receivers in the product lineup below. Although most are NFC or RFID, you may be able to tweak them to do what you want.

https://www.ti.com/wireless-connectivity/other-wireless-technologies/products.html

[labnet]

I've looked at most the RFID chips and they are mainly tailored to OOK/ASK operation.

[vk4ffab]

I've looked at most the RFID chips and they are mainly tailored to OOK/ASK operation.

Take a look on LCSC, they have the Chinese version of the FM telephone IC's. I got a 100 of them here like 12 cents a pop, I use them for the Gilbert Cell mixer rather than a NE612.

EDIT, Ok they are still there, they have 1400 in stock, 22 cents in 150 lots, MC3361 copy by UTC. Even if that part if not useful, dig though their china parts you might find exactly what you are looking for.

[labnet]

Thanks VK4FFAB. That's leading me down a few rabbit holes.
For example http://www.lansdale.com specialize in buying old semiconductor lines to keep making old IC's
http://www.utc-ic.com/en/products/categories/special/RadioandCassetteRecorderCircui/ have some old FM IC's

[vk4ffab]

Thanks VK4FFAB. That's leading me down a few rabbit holes.
For example http://www.lansdale.com specialize in buying old semiconductor lines to keep making old IC's
http://www.utc-ic.com/en/products/categories/special/RadioandCassetteRecorderCircui/ have some old FM IC's

You're welcome. I hope it proves fruitful.