MAX3185CWP

Overview

The MAX3185CWP 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 requiring 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 utilizes VCC (+4.5V to +5.5V), VDD (+10.8V to +13.2V), and VSS (-10.8V to -13.2V) supplies. The component is housed in a 20-pin Wide SO package and supports an operating temperature range of 0°C to +70°C.

Feature Summary

• Enhanced ESD protection on all transmitter outputs and receiver inputs, rated at ±15kV Human Body Model, ±8kV IEC1000-4-2 Contact Discharge, and ±15kV IEC1000-4-2 Air-Gap Discharge.
• Latchup-free operation during electrostatic discharge events ensures continued functionality after exposure.
• Pin and functionally compatible with the industry-standard SN75C185, allowing existing designs to become EMC compliant instantly.
• Flow-through pinout architecture simplifies integration into standard RS-232 interconnecting cable layouts.

Applications

• Desktop PC motherboards
• Instruments meeting IEC1000-4-2 standards
• Equipment requiring robust ESD protection

Procurement Notes

Verify the specific suffix 'CWP' corresponds to the commercial temperature range (0°C to +70°C) and the 20-pin Wide SOIC package configuration. Confirm that the ordering code matches the exact manufacturer part number to ensure correct electrical characteristics and physical dimensions are received.

Selection Notes

Select this component when designing systems that require full DTE RS-232 functionality without external charge pumps. It is suitable for environments needing high ESD immunity levels compliant with European community requirements. Ensure supply voltages align with the specified ranges for VCC, VDD, and VSS pins.

Part Context

The MAX3185 series provides EMC-compliant serial port solutions optimized for personal computer architectures. The C variant denotes the commercial temperature grade, distinguishing it from the E variant which covers extended industrial temperatures. This specific model integrates multiple drivers and receivers into a single compact package.

Replacement Considerations

The MAX3185 is pin-compatible with the SN75C185. Designers can substitute this component directly into existing circuits utilizing the SN75C185 to achieve improved ESD performance and EMC compliance without modifying the board layout.

FAQ

Does the MAX3185CWP include an internal charge pump?

No, the MAX3185CWP does not include an internal charge pump, which optimizes it for specific desktop PC and motherboard applications.

What is the guaranteed maximum data rate for this device?

The device is guaranteed to operate at data rates up to 230kbps.

How many transmitter and receiver channels are available?

The MAX3185CWP contains three RS-232 transmitters and five RS-232 receivers.