MAX3222CAP+TG1Z

Overview

The MAX3222CAP+TG1Z is a true RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single 3.0V to 5.5V supply and features two drivers and two receivers for full-duplex communication. The device guarantees data rates up to 120kbps, with typical operation reaching 235kbps. It utilizes a dual charge pump requiring four external 0.1µF capacitors. Key electrical parameters include a shutdown supply current of 1µA, an input voltage range of ±25V on receiver inputs, and transmitter output voltages of ±5.0V. The component is housed in a 20-pin SSOP package and supports an operating temperature range of 0°C to +70°C.

Feature Summary

• Proprietary low-dropout transmitter output stage enables true RS-232 performance from a single 3.0V to 5.5V supply.
• Integrated dual charge pump requires only four small 0.1µF external capacitors for voltage generation.
• Shutdown mode reduces power consumption to 1µA while keeping receivers active for modem monitoring.
• Pin, package, and functionally compatible with industry-standard MAX242 and MAX232 devices.

Applications

• Notebook, Subnotebook, and Palmtop Computers
• High-Speed Modems
• Battery-Powered Equipment
• Hand-Held Equipment
• Peripherals and Printers

Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm package type, temperature range, and lead-free status. Confirm that the TG1Z designation aligns with the intended reel or tape configuration requirements for your assembly process. Cross-reference the part number with the latest datasheet revision to ensure compatibility with current manufacturing standards.

Selection Notes

Select this component when interfacing TTL/CMOS logic with RS-232 ports in portable or battery-operated systems. It is suitable for applications requiring low standby power due to its 1µA shutdown capability. Ensure the design accommodates the required four external charge-pump capacitors. Verify that the 120kbps guaranteed rate meets system timing requirements, as higher speeds are typical but not guaranteed.

Part Context

This device belongs to the MAX3222/MAX3232/MAX3237/MAX3241 family of low-power RS-232 transceivers. It serves as a direct replacement for legacy MAX232-based designs while offering improved power efficiency and single-supply operation. The MAX3222 variant specifically provides two drivers and two receivers, distinguishing it from the multi-driver MAX3241 or high-speed MAX3237 within the same series.

Replacement Considerations

MAX3222CAP+ is a compatible alternative with identical pinout and functionality. For ESD-protected variants, consider the MAX3222EAP+ series. Direct replacements like MAX232 require different voltage supplies and capacitor configurations.