F81438G Multi-Protocol RS-232 / RS-485 / RS-422 Transceiver, TSSOP-28
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Prices updated: 13 Oct 2026
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About this product
The F81438G is a multi-protocol transceiver IC that supports the RS-232, RS-485 and RS-422 serial standards in a single TSSOP-28 package. It converts logic-level serial signals from a microcontroller into the selected bus standard, which suits industrial, instrumentation and PC serial interface designs.
Specifications
- Supported protocols
- RS-232, RS-485, RS-422 / RS-232 وRS-485 وRS-422
- Package
- TSSOP-28
- Function
- Multi-protocol serial transceiver / مرسل ومستقبل تسلسلي متعدد البروتوكولات
- Signal conversion
- Logic level to RS-232 / RS-485 / RS-422 bus / من المنطق الرقمي إلى ناقل RS-232 / RS-485 / RS-422
Frequently asked questions
How is the protocol mode selected on the F81438G?
The mode is set through the chip's control pins as described in its datasheet. Confirm the mode-select pin logic before wiring the bus.
Can I connect it directly to a PC COM port?
Yes, when set to RS-232 mode. The PC COM port uses RS-232 levels, so connect TX, RX and GND correctly. For RS-485 or RS-422 you need the differential A/B (or TX+/TX-, RX+/RX-) lines and the proper bus termination.
