MAX3223EEPP+

Overview

The MAX3223EEPP+ is a lead-free, RoHS-compliant RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It features two drivers and two receivers in a 20-pin PDIP package. The device operates from a single +3.0V to +5.5V supply and supports data rates up to 250kbps. It incorporates AutoShutdown technology to achieve a 1µA supply current when no valid signal is detected. All transmitter outputs and receiver inputs are protected against electrostatic discharge up to ±15kV using the Human Body Model. The component functions within an operating temperature range of -40°C to +85°C.

Feature Summary

• AutoShutdown feature reduces supply current to 1µA during idle periods without BIOS modifications
• Integrated dual charge pump generates true RS-232 levels from a single low-voltage supply
• Enhanced ESD protection on all I/O pins withstands ±15kV human body model discharges

Applications

• Notebook, subnotebook, and palmtop computers
• Battery-powered equipment and handheld devices
• Cellular phones and peripherals

Procurement Notes

Verify the specific suffix EEPP+ corresponds to the required 20-pin PDIP package and industrial temperature grade (-40°C to +85°C). Confirm that the ordering code includes the '+' designation for lead-free and RoHS compliance status before finalizing procurement orders.

Selection Notes

Select this component when a full-duplex RS-232 interface with two channels is required in a through-hole DIP format. Ensure the application environment requires operation down to -40°C, as the 'E' suffix denotes the extended temperature range compared to commercial variants.

Part Context

This part belongs to the MAX3221E/MAX3223E/MAX3243E family of 3V-powered RS-232 transceivers. While the MAX3221E provides one channel and the MAX3243E offers three drivers and five receivers, the MAX3223E specifically provides two drivers and two receivers for standard serial port implementations.

Replacement Considerations

Publicly confirmed substitute part numbers include MAX3223ECAP+, MAX3223ECUP+, and MAX3223ECTP+. These alternatives share identical electrical specifications but utilize different packages such as SSOP, TSSOP, or TQFN.

FAQ

How does the AutoShutdown feature function?

The AutoShutdown circuitry monitors receiver inputs. If no valid RS-232 signal levels are detected for 30µs, the internal charge pumps and drivers shut off, reducing the supply current to 1µA.

What is the maximum data rate supported?

The device is guaranteed to operate at data rates up to 250kbps while maintaining proper RS-232 output voltage levels under worst-case load conditions.

Does the device require external voltage regulators?

No, the MAX3223EEPP+ contains an internal regulated dual charge pump that generates the necessary positive and negative voltages for RS-232 signaling from a single +3.0V to +5.5V supply.