COSINE Tier-1 distributor Jarwey｜USB mux: COSTS3USB30E vs COSUSB42MUX, same MSOP-10
Jarwey is a COSINE Tier-1 distributor and can help with selection, datasheets, samples, small lots, and lead time.
On a DAQ board or a consumer-electronics port, a USB differential pair that must steer between two paths starts with the name on the product page. A shared MSOP-10 outline is not the decision.
COSTS3USB30E is named a USB high-speed analog switch. The function line says it is a USB high-speed signal-path analog switch, in MSOP-10, with counterparts TS3USB30E / FSUSB30 (verify on a sample). The application line is automotive and industrial control, plus USB signal switching.
COSUSB42MUX is named a USB analog-switch multiplexer. The function line says USB analog-switch mux, also MSOP-10, with only FSUSB42 as the counterpart (verify on a sample). The application line is the same: automotive and industrial control, plus USB signal switching.
Neither page carries a datasheet. Neither page states bandwidth, on-resistance, or whether the path is USB 2.0 or USB 3.x. Do not copy those figures from a counterpart datasheet, and do not treat the matching package as proof. Ask Jarwey for the COSINE datasheet. Do not ask the original factory.
COS3157ST is a single SPDT analog switch in SOT-23-6. The function line is SPDT analog switch / mux. The application line is automotive and industrial control only — the page does not mention USB. Counterparts are TS5A3157 / SN74LVC1G3157 / FSA3157 (verify). It is not a stand-in for either USB part.
The baseband / USB / RF path split, and the COS4514TR versus COS4515TR logic-complement note, are already published. This note does not reprint the analog-switch family table. It only answers whether the two MSOP-10 USB parts are interchangeable.
Same MSOP-10, two part numbers
| Part | Page name | Package | Function line | Counterpart (verify) | Not on the page | Page |
|---|---|---|---|---|---|---|
| COSTS3USB30E | USB high-speed analog switch | MSOP-10 | USB high-speed signal-path analog switch | TS3USB30E / FSUSB30 | Bandwidth, Ron, USB generation, datasheet | 994 |
| COSUSB42MUX | USB analog-switch multiplexer | MSOP-10 | USB analog-switch mux | FSUSB42 | Bandwidth, Ron, USB generation, datasheet | 995 |
| COS3157ST | SPDT analog switch | SOT-23-6 | SPDT analog switch / mux | TS5A3157 / SN74LVC1G3157 / FSA3157 | The page does not mention USB | 988 |
One page is a high-speed signal-path switch. The other is a multiplexer. The counterparts are TS3USB30E / FSUSB30 on one side and FSUSB42 on the other. Those names are evaluation anchors, not a drop-in, no-verification replacement. Eye diagram, bandwidth, and on-resistance come from the datasheet Jarwey supplies.
Do not steer a USB pair with the general SPDT
D+ and D− belong on whichever of COSTS3USB30E or COSUSB42MUX matches the page name you actually need. COS3157ST is an SPDT in SOT-23-6, and its page never says USB. A single-ended baseband switch can be evaluated on its own. A USB pair should not.
Selection checklist
- Read the page name first. Signal-path switch: COSTS3USB30E. Multiplexer: COSUSB42MUX.
- The counterparts are not the same part. Check pinout and bandwidth of TS3USB30E / FSUSB30 against FSUSB42 on a sample. No unverified replacement.
- Leave unpublished numbers off the BOM. Neither page states bandwidth, Ron, or USB 2.0 versus USB 3.x.
- The same package is not the same pinout. Both are MSOP-10. Pins still come from the datasheet.
- Do not switch USB with COS3157ST. That page does not mention USB, and the package is SOT-23-6.
- Supply and logic level. Neither USB page states them. Whether the rail matches the MCU I/O waits on the datasheet.
- Datasheet, samples, and lead time. Ask Jarwey. Do not ask the original factory.
Product pages
- COSTS3USB30E — USB high-speed signal-path analog switch, MSOP-10
- COSUSB42MUX — USB analog-switch mux, MSOP-10
- COS3157ST — SPDT, SOT-23-6, page does not mention USB
Send Jarwey the USB switch on the schematic and the imported part number in use: kerry.w@jarwey.cn · Contact.
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