CROSS-REFERENCE ALTERNATIVE
COS3157ST is a Chinese-manufactured Analog Switch / Multiplexer from COSINE (科山芯创) that cross-references to FAN3157 (onsemi(安森美)).
It is a SOT23-6 device positioned as a domestic-supply option against the imported: shorter lead times, no allocation risk and a stable price for volume production. Because the parts are not pin-identical in every case, the engineering checklist below lists what to verify before you commit.
Cross-reference · Before you substitute · Related parts · FAQ · Request a quote
COS3157ST — Analog Switch / Multiplexer, alternative to FAN3157
COS3157ST is supplied by Shenzhen Jingteng Electronics (JTDZ Tech) as a domestically sourced option for FAN3157 (onsemi(安森美)). Imported parts in this class are frequently subject to allocation, long lead times and steep price swings. A Chinese-manufactured equivalent removes that exposure: the parts are production-validated in industrial, consumer and automotive designs and ship from stock on a short lead time.
Cross-reference chart — which imported parts does COS3157ST replace?
Every imported part number that COS3157ST is published as a cross-reference alternative to, per the COSINE (科山芯创) 2025 selection table:
| imported part number | brand | Replaced by (this part) |
|---|---|---|
| FAN3157 | onsemi(安森美) | COS3157ST |
Cross-reference means functional equivalence in the same application role. It is not a blanket claim of pin-for-pin identity — confirm package, pinout and the parameters listed below before you release a design change.
Device information
| Part number | COS3157ST |
| Manufacturer | COSINE (科山芯创) |
| Device class | Analog Switch / Multiplexer |
| Package | SOT23-6 |
| Pin Count | 6 |
| Verified and new, traceable date code | |
| Stock | In stock, ships within 24 hours |
| Description | Analog Switch / Multiplexer, SOT23-6 package. |
What to verify before substituting COS3157ST
These are the parameters that decide whether a cross-reference works in practice. Run through the list against the datasheet before releasing a change:
- On-resistance and its flatness over the signal range — flatness causes distortion in audio and precision paths
- Charge injection, which produces a voltage step when the switch is toggled with a high-impedance load
- Off-state leakage and on-state leakage across the full temperature range
- Signal range: whether the switch passes signals beyond the supply rails and its absolute maximum ratings
- Switch configuration (SPST/SPDT/DPDT) and control logic polarity
- Bandwidth and on-capacitance for high-speed paths
- Package, pinout and the number of channels
Typical applications
- Signal routing and channel selection
- Audio and video signal switching
- USB and high-speed data path switching
- Sensor multiplexing in data acquisition
- Test and measurement relay replacement
- Portable device accessory detection
Related COSINE parts and alternatives
Other {BRAND} parts in the same device family or the same device class — useful when you are cross-referencing a whole BOM rather than a single line item.
| COSINE part | Package | Cross-references to | Relation |
|---|---|---|---|
| COS4561TR | SOT23-6 | MAX4561EUT+T | Analog Switch / Multiplexer |
| COS4514TR | SOT23-5 | TS12A4514DBVR, MAX4568EUT+T | Analog Switch / Multiplexer |
| COS4515TR | SOT23-5 | TS12A4515DBVR, MAX4569EUT+T | Analog Switch / Multiplexer |
| COS12A12511S | MSOP8 | — | Analog Switch / Multiplexer |
| COS12A12511 | MSOP8 | TS12A12511 | Analog Switch / Multiplexer |
| COS5A23159 | MSOP10 | TS5A23159 | Analog Switch / Multiplexer |
| COSTS3USB30E | MSOP10 | TS3USB30EDGSR, FSUSB30MUX | Analog Switch / Multiplexer |
| COSUSB42MUX | MSOP10 | TMUXHS221, FSUSB42MUX | Analog Switch / Multiplexer |
Frequently asked questions
What does COS3157ST replace?
According to the COSINE (科山芯创) 2025 cross-reference table, COS3157ST is published as an alternative to FAN3157 (onsemi(安森美)).
Is COS3157ST a pin-to-pin drop-in for FAN3157?
Cross-reference means the part is intended for the same application role; it is not a blanket guarantee of pin-for-pin identity. Check package, pinout and the parameters listed under “What to verify” above, or send us your BOM and we will confirm before you commit.
Can you supply the FAN3157 as well?
Yes. We source both the imported and the Chinese-manufactured alternative, so you can compare price, lead time and availability on the same quote.
What is the MOQ and lead time for COS3157ST?
MOQ 1 pc. COS3157ST is held in stock and ships within 24 hours; quotes are returned within 2 business hours. We ship worldwide including India, Vietnam and the Middle East.
Request a quote for COS3157ST
Send us the part number and target quantity — we reply within 2 business hours with price, stock and a cross-reference confirmation.
Request a quote More Interface Chips / RF Chips
Genuine original parts guaranteed — traceable lot & date code, X-ray / visual inspection and third-party test supported before shipment.
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