MAX241CAI-T

Overview

The MAX241CAI-T is a +5V-powered, multichannel RS-232 driver and receiver manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of 4.5V to 5.5V and supports data rates up to 120kbps. The device features an integrated charge pump circuitry that eliminates the need for external bipolar ±12V supplies, enabling single-supply operation. It includes four drivers and five receivers in a 28-pin SSOP package. The component provides a shutdown mode with a typical current consumption of 10µA at +25°C. Receiver input hysteresis is specified at 500mV, and it functions reliably across an operating temperature range of 0°C to +70°C.

Feature Summary

• Integrated charge pump circuitry enables single +5V supply operation without requiring external bipolar power sources.
• Includes a low-power shutdown mode designed to minimize energy consumption when the device is not actively transmitting or receiving.
• Provides full RS-232 compatibility with TTL/CMOS logic level translation capabilities.

Applications

• Interface translation between TTL/CMOS devices and RS-232 communication lines
• Multidrop RS-232 network connections
• Portable diagnostic equipment requiring serial communication

Procurement Notes

Verify the specific ordering suffix 'CAI' against official manufacturer documentation to confirm the exact package type, temperature rating, and tape-and-reel configuration. Confirm RoHS compliance status and lead-free soldering specifications prior to integration into production designs.

Selection Notes

Select this component for applications requiring multiple RS-232 channels on a single +5V supply. Ensure the design accommodates the required external capacitors for the internal charge pump. Verify that the 0°C to +70°C commercial temperature range meets the environmental requirements of the target application.

Part Context

This part belongs to the MAX220–MAX249 family of line drivers and receivers intended for EIA/TIA-232E and V.28/V.24 interfaces. The family offers various channel configurations and packages to address different board space and performance needs.

Replacement Considerations

Consult the official selection table for direct pin-compatible alternatives within the MAX220–MAX249 family that offer different channel counts or extended temperature ranges.

FAQ

Does the MAX241CAI-T require external capacitors for its charge pump?

Yes, the datasheet specifies the use of external capacitors (typically C1–C4) to support the internal dual charge-pump DC-DC voltage converters.

What is the maximum data rate supported by this device?

The device supports data rates up to 120kbps under normal operating conditions.

How does the shutdown feature affect the V+ and V- outputs?

When the shutdown feature is active, the V- output falls to 0V and the V+ output falls to +5V.