MAX3185EAP+T

Overview

The MAX3185EAP+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 operates with VCC at +4.5V to +5.5V, VDD at +10.8V to +13.2V, and VSS at -10.8V to -13.2V. It guarantees data rates up to 230kbps and provides enhanced ESD protection of ±15kV (Human Body Model) and ±8kV (IEC 1000-4-2 Contact Discharge). Supply currents are less than 300µA for IDD and ISS, and less than 1mA for ICC. It is housed in a 20-pin SSOP package.

Feature Summary

• Enhanced ESD protection on all transmitter outputs and receiver inputs
• Pin and functionally compatible with the industry-standard 75185
• Flow-through pinout architecture for simplified board 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 component against official Analog Devices or Maxim Integrated datasheets to confirm authenticity. Ensure the ordering suffix matches the required temperature range and package type. Check RoHS compliance status as indicated in the manufacturer's documentation before finalizing procurement.

Selection Notes

Select this component when designing systems that require direct compatibility with legacy SN75C185 designs while needing superior ESD immunity. It is suitable for applications where eliminating external charge pumps reduces board space and component count. Verify voltage supply rails match the specific VCC, VDD, and VSS requirements.

Part Context

The MAX3185 series includes variants such as the MAX3185CWP and MAX3185EWP. These devices share the same core functionality but differ in operating temperature ranges and package types. The MAX3185EAP+T specifically denotes the extended temperature range (-40°C to +85°C) and the 20-pin SSOP package configuration.

Replacement Considerations

The SN75C185 is a pin-compatible alternative. Designs can be updated to use the MAX3185EAP+T to achieve immediate EMC compliance without changing the physical footprint.