MAX3185CAP-T

Overview

The MAX3185CAP-T is a complete DTE RS-232 serial port transceiver designed for desktop PC and motherboard applications. It features three RS-232 transmitters and five RS-232 receivers without an internal charge pump. The device guarantees data rates up to 230kbps and operates with power-supply currents less than 300µA for IDD and ISS, and less than 1mA for ICC. It provides enhanced ESD protection rated at ±15kV (Human Body Model), ±8kV (IEC 1000-4-2 Contact Discharge), and ±15kV (Air-Gap Discharge). The component is available in 20-pin SO and SSOP packages and supports an operating temperature range of 0°C to +70°C.

Feature Summary

• Enhanced ESD protection on all transmitter outputs and receiver inputs
• Pin and functionally compatible with the industry-standard 75185
• Flow-through pinout configuration for simplified layout
• Latchup-free operation during electrostatic discharge events

Applications

• Desktop PC motherboards
• Instruments meeting IEC1000-4-2 standards
• Equipment requiring EMC compliance

Procurement Notes

Verify the specific suffix 'T' against official documentation to confirm tape-and-reel packaging requirements. Confirm that the 'CAP' designation strictly corresponds to the 0°C to +70°C commercial temperature range and SSOP package type. Ensure compatibility with existing designs by validating pin assignments against the SN75C185 standard.

Selection Notes

Select this component when designing systems requiring robust ESD immunity without external protection diodes. It is suitable for applications needing multiple receiver channels and high-speed data transmission up to 230kbps. Verify that the system can provide the necessary VDD and VSS supply voltages, as the device lacks an internal charge pump.

Part Context

The MAX3185 series serves as an EMC-compliant alternative to legacy RS-232 transceivers. It integrates complete DTE serial port functionality into a compact footprint. The device allows existing designs to achieve compliance with stringent European community ESD requirements while maintaining compatibility with popular personal computer communication software.

Replacement Considerations

The MAX3185 is pin-compatible with the SN75C185. Designers can replace older components with this part to instantly achieve EMC compliance without modifying the board layout.