SN75C185DWG4

Drivers, Receivers, Transceivers Overview

The SN75C185DWG4 is a fully compliant RS-232 transceiver manufactured by Texas Instruments, housed in a 20-SOIC surface-mount package. It integrates three drivers and five receivers to support full-duplex communication. The device operates within a supply voltage range of 4.5V to 13.2V and features a receiver hysteresis of 1.1V for noise immunity. Designed for industrial environments, it supports an operating temperature range from 0°C to 70°C. This component is the RoHS-compliant variant (suffix G4) of the SN75C185DW, which has reached end-of-life status.

Drivers, Receivers, Transceivers Feature Summary

• Integrates three independent drivers and five independent receivers on a single chip.
• Provides enhanced noise rejection through a 1.1V receiver input hysteresis.
• Supports wide supply voltage operation ranging from 4.5V to 13.2V.
• Complies with RoHS3 standards as indicated by the G4 suffix.

Drivers, Receivers, Transceivers Applications

• Industrial control systems requiring robust RS-232 connectivity.
• Data acquisition equipment operating in electrically noisy environments.
• Communication interfaces for embedded systems utilizing standard RS-232 protocols.

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix carefully, as the G4 designation indicates RoHS compliance. Confirm current availability status, as the base SN75C185DW model is discontinued. Ensure the procurement channel provides valid traceability documentation for the Texas Instruments manufacturing source. Cross-reference the DigiKey part number 296-1753-5-ND for accurate identification during sourcing.

Drivers, Receivers, Transceivers Selection Notes

Select this component when a 20-pin SOIC footprint is required for RS-232 applications. The 1.1V hysteresis makes it suitable for high-noise industrial settings compared to lower-hysteresis alternatives. Consider the SN75C185DWR as a recommended manufacturer substitute if tube packaging is not strictly necessary. Verify that the 4.5V to 13.2V supply range aligns with the system power design.

Drivers, Receivers, Transceivers Part Context

This part belongs to the SN75C185 family of low-power RS-232 transceivers. The 'G4' suffix specifically denotes a lead-free, RoHS-compliant version of the original SN75C185DW. While the base DW model is obsolete, the G4 variant represents the environmentally compliant iteration intended for long-term production use in compatible designs.

Drivers, Receivers, Transceivers Replacement Considerations

Texas Instruments recommends the SN75C185DWR as a direct replacement. This alternative offers identical electrical specifications but utilizes tape-and-reel packaging instead of tubes. Both parts share the same 20-SOIC package and functional pinout.