MAX3185CAP+T

Overview

The MAX3185CAP+T is a complete DTE RS-232 serial port transceiver designed for desktop PC and motherboard applications. It integrates three RS-232 transmitters and five RS-232 receivers without requiring an internal charge pump. The device operates with VCC between +4.5V and +5.5V, VDD between +10.8V and +13.2V, and VSS between -10.8V and -13.2V. It guarantees data rates up to 230kbps and features enhanced ESD protection of ±15kV (Human Body Model) and ±8kV (IEC 1000-4-2 Contact Discharge). The component is housed in a 20-pin SSOP package and functions within a temperature range of 0°C to +70°C.

Feature Summary

• Enhanced electrostatic discharge protection on all transmitter outputs and receiver inputs ensures robustness against static electricity events.
• Pin and functionally compatible with the industry-standard SN75C185, allowing direct replacement in existing designs.
• Flow-through pinout configuration facilitates efficient printed circuit board layout.

Applications

• Desktop PC motherboards
• Instruments meeting IEC1000-4-2 EMC requirements

Procurement Notes

Verify that the ordering suffix 'CAP' corresponds to the commercial temperature range of 0°C to +70°C and the 20-pin SSOP package format. Confirm compliance with RoHS directives as indicated by the '+' suffix. Ensure the supply voltage rails match the required +5V logic and ±12V RS-232 levels before integration.

Selection Notes

Select this component when designing DTE serial ports that require high ESD immunity without the complexity of onboard charge pumps. It serves as a drop-in replacement for the SN75C185 in systems needing guaranteed performance up to 230kbps. Verify that the application environment remains within the 0°C to +70°C operating range specified for the 'C' grade variant.

Part Context

The MAX3185 series provides EMC-compliant RS-232 solutions optimized for space-constrained environments like motherboards. The 'E' suffix variants extend the operating temperature to -40°C to +85°C for industrial use. The 'C' suffix denotes the commercial temperature range found in this specific part number.

Replacement Considerations

The MAX3185 is pin-compatible with the SN75C185. For extended temperature ranges, consider the MAX3185EAP+T (-40°C to +85°C, SSOP) or MAX3185EWP (-40°C to +85°C, SO).