MAX3223CPP

Overview

The MAX3223CPP is a dual-driver, dual-receiver RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +3.0V to +5.5V supply and achieves a 1µA supply current via the AutoShutdown feature. The device supports data rates up to 120kbps (typical 235kbps) with ±5.4V output swings. It utilizes internal charge pumps requiring only 0.1µF capacitors for 3.3V operation. The component is housed in a 20-pin Plastic DIP package and functions within an operating temperature range of 0°C to +70°C.

Feature Summary

• AutoShutdown technology reduces supply current to 1µA when no valid RS-232 signal levels are detected on receiver inputs for 30µs.
• Integrated dual charge-pump power supply generates true RS-232 performance from a single low-voltage source without external ±12V supplies.
• Transmitters and receivers provide EIA/TIA-232 compatibility with high electrostatic discharge protection capabilities.

Applications

• Battery-powered equipment
• Hand-held devices
• Portable diagnostics equipment

Procurement Notes

Verify the specific suffix CPP indicates the 20-pin Plastic DIP package and commercial temperature grade (0°C to +70°C). Confirm RoHS compliance status through official manufacturer documentation or authorized distributors before procurement.

Selection Notes

Select this part for applications requiring full-duplex RS-232 communication with minimal standby power consumption. Ensure the system voltage remains within the +3.0V to +5.5V range and that the 20-pin DIP footprint matches the PCB layout requirements.

Part Context

This component belongs to the MAX3221/MAX3223/MAX3243 family of 3V-powered RS-232 transceivers. The MAX3223 variant specifically provides two drivers and two receivers, distinguishing it from the single-channel MAX3221 and the multi-channel MAX3243.

Replacement Considerations

Publicly confirmed substitutes include the MAX3223EPP (extended temperature -40°C to +85°C) and the MAX3223CAP (SSOP package). Verify pinout compatibility and thermal specifications when substituting.

FAQ

How does the AutoShutdown feature function?

When FORCEON is low and FORCEOFF is high, the device shuts down its onboard power supply and drivers if no valid signal levels are sensed on all receiver inputs for 30µs, reducing supply current to 1µA.

What capacitor values are required for 3.3V operation?

For 3.3V operation, the datasheet specifies using 0.1µF capacitors for C1, C2, C3, and C4.

What is the maximum guaranteed data rate?

The device guarantees a data rate of 120kbps under worst-case load conditions, though typical operation can reach 235kbps.