MAX3222CPN+

Overview

The MAX3222CPN+ is a true RS-232 transceiver manufactured by Analog Devices/Maxim Integrated, housed in an 18-pin Plastic DIP package. It operates from a single +3.0V to +5.5V supply and includes dual charge pumps requiring only four 0.1µF external capacitors. The device features two drivers and two receivers with full-duplex communication capability. It guarantees data rates up to 120kbps at worst-case loads of 3kΩ parallel with 1000pF, while typical operation supports up to 235kbps. The component functions within a commercial temperature range of 0°C to +70°C.

Feature Summary

• Integrated dual charge pump circuitry eliminates the need for bipolar ±12V power supplies.
• Compatible with industry-standard MAX242 pinouts and functionality.
• Shutdown mode reduces supply current to less than 1µA while maintaining receiver activity.

Applications

• Battery-powered equipment
• Hand-held devices
• Peripherals
• Datacom equipment

Procurement Notes

Verify the ordering suffix 'C' confirms the 0°C to +70°C commercial operating temperature range. Confirm the 'P' suffix indicates the 18-pin Plastic DIP package type. Ensure the '+' suffix denotes lead-free compliance as per the manufacturer's specifications. Cross-reference the manufacturer part number with distributor identifiers to ensure accurate sourcing.

Selection Notes

Select this component when interfacing TTL or CMOS logic with RS-232 standards using a single low-voltage supply. It serves as a direct replacement for legacy MAX232 designs without requiring negative voltage generation. Consider the 18-pin DIP form factor for through-hole prototyping or specific enclosure constraints where surface-mount options are unsuitable.

Part Context

This device belongs to the MAX3222/MAX3232/MAX3237/MAX3241 family of low-power RS-232 transceivers. While other members like the MAX3237 offer higher MegaBaud speeds, the MAX3222 provides standard performance optimized for general serial communication tasks. It shares the same internal architecture regarding charge pump efficiency and shutdown capabilities as its siblings.

Replacement Considerations

The MAX3222CPN+ is functionally compatible with the Maxim MAX232. Verify that the application does not require data rates exceeding 120kbps under heavy load conditions, as the MAX232 typically supports similar standard rates but may differ in capacitor requirements or drive strength characteristics.