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Product Detailed Parameters
- Description：IC TRANSCEIVER FULL 3/5 20SOIC
- Mfr：Analog Devices Inc./Maxim Integrated
- Package：Tape & Reel (TR)
- Series：-
- Type：Transceiver
- Protocol：RS232
- Number of Drivers/Receivers：3月5日
- Duplex：Full
- Data Rate：230kbps
- Voltage - Supply：4.5V ~ 5.5V
- Operating Temperature：0°C ~ 70°C
- Mounting Type：Surface Mount
- Package / Case：20-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：20-SOIC
- Receiver Hysteresis：650 mV
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Overview
The MAX3185CWP-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 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 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, ensuring latchup-free operation during electrostatic discharge events.
- Pin and functionally compatible with the industry-standard SN75C185, allowing existing designs to become EMC compliant instantly.
- Flow-through pinout configuration that optimizes board space and simplifies integration into motherboards and instruments.
Applications
- Desktop PC Motherboards
- Instruments meeting IEC1000-4-2 standards
- Equipment requiring robust ESD protection
Procurement Notes
Verify the specific suffix 'T' indicates tape-and-reel packaging when sourcing this part number. Confirm the 'C' grade designation matches the required commercial temperature range of 0°C to +70°C for your application environment. Ensure compatibility with the 20-SOIC footprint during procurement planning.
Selection Notes
Select the MAX3185CWP-T when designing systems that require full-duplex RS-232 communication without the complexity of external charge pumps. This component is suitable for replacing standard 75185 devices to achieve higher EMC compliance levels. Verify that the system power rails can support the specified VDD and VSS voltage ranges for proper signal swing.
Part Context
The MAX3185 series provides a complete DTE RS-232 solution optimized for high-density PCB layouts. The C-grade variant specifically targets commercial environments with a defined temperature limit. The device integrates enhanced protection structures to withstand significant static discharge while maintaining signal integrity at high data rates.
Replacement Considerations
The MAX3185CWP-T is pin-compatible with the SN75C185DW. Designers may substitute the SN75C185DWR as a manufacturer-recommended alternative from Texas Instruments.
FAQ
Does the MAX3185CWP-T include an internal charge pump?
No, the MAX3185CWP-T does not include an internal charge pump, which helps optimize it for desktop PC and motherboard applications.
What is the guaranteed maximum data rate for this device?
The MAX3185CWP-T is guaranteed to operate at data rates up to 230kbps.
How is the device protected against electrostatic discharge?
Transmitter outputs and receiver inputs are protected to ±15kV (Human Body Model), ±8kV (IEC1000-4-2 Contact Discharge), and ±15kV (IEC1000-4-2 Air-Gap Discharge).
