MAX3224ECAP+T

Overview

The MAX3224ECAP+T is a dual RS-232 transceiver from the MAX3224E family, manufactured by Analog Devices (Maxim Integrated). It operates on a single +3.0V to +5.5V supply and features AutoShutdown Plus technology, achieving a typical supply current of 1μA when inactive. The device guarantees a data rate of 250kbps with worst-case loads of 3kΩ in parallel with 1000pF. It includes two drivers and two receivers, providing full-duplex communication. Enhanced ESD protection is rated at ±15kV via the Human Body Model and IEC 1000-4-2 Air-Gap Discharge. The component is housed in a 20-pin SSOP package and supports an operating temperature range of 0°C to +70°C.

Feature Summary

• AutoShutdown Plus functionality automatically reduces power consumption by shutting down internal charge pumps during periods of inactivity.
• Integrated dual charge pump generates required positive and negative voltage rails using only four small external capacitors.
• Logic-level READY output indicates when the internal charge pump is regulating and the device is ready for transmission.
• INVALID output signal detects the presence or absence of valid RS-232 voltage levels on receiver inputs.

Applications

• Notebook, subnotebook, and palmtop computers
• Cellular phones and battery-powered equipment
• Hand-held devices and peripherals such as printers
• Automotive systems requiring low-power serial interfaces

Procurement Notes

Verify the specific suffix 'CAP' corresponds to the 20-pin SSOP package and the 'E' designation confirms the commercial temperature range of 0°C to +70°C. Confirm that the '+T' suffix indicates tape-and-reel packaging if reel quantity is required for assembly. Ensure the source document explicitly lists this exact part number variant to avoid confusion with industrial or automotive temperature grades.

Selection Notes

Select the MAX3224ECAP+T when a dual-channel RS-232 interface is needed with strict power constraints. This model provides 250kbps throughput, which is sufficient for standard modem communications but distinct from the 1Mbps MegaBaud variants like the MAX3225E. The SSOP package is suitable for space-constrained designs where surface-mount assembly is preferred over through-hole DIP options.

Part Context

This component belongs to the MAX3224E/MAX3225E/MAX3226E/MAX3227E/MAX3244E/MAX3245E family of 3V-powered RS-232 transceivers. While sharing the same core architecture and AutoShutdown Plus feature, other members differ in channel count (single vs. triple) and guaranteed data rates (250kbps vs. 1Mbps). The MAX3224E specifically defines the dual-driver, dual-receiver configuration within this series.

Replacement Considerations

The MAX3224EEAP+ serves as a direct functional replacement offering the same electrical specifications but extended to the industrial temperature range of -40°C to +85°C. Designers must verify thermal requirements before substituting the ECAP variant with the EEAP version.