MAX209ENG

Drivers, Receivers, Transceivers Overview

The MAX209ENG is a +5V RS-232 transceiver from the MAX200-MAX209 family, featuring integrated charge-pump circuitry for single-supply operation. It includes two drivers and five receivers with TTL/CMOS-compatible inputs. The device operates on a VCC supply of +5V ±10% and requires an external V+ supply in the +9.0V to +13.2V range. Electrical performance guarantees output voltage swings of ±8V typical under nominal loads. Supply current is typically 1mA at VCC and 7mA to 15mA at V+. The component supports data rates exceeding 120kbps and features low-power shutdown modes.

Drivers, Receivers, Transceivers Feature Summary

• Integrated charge pump eliminates the need for bipolar ±12V supplies
• TTL and CMOS input logic compatibility
• Low-power shutdown mode reduces supply current significantly
• High noise margin due to tight receiver input thresholds

Drivers, Receivers, Transceivers Applications

• Battery-powered equipment requiring extended operation
• Handheld devices with limited board space
• Portable diagnostic equipment

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'ENG' against official manufacturer documentation to confirm temperature grade and package type. Ensure the system design provides the required +9.0V to +13.2V V+ supply rail, as this model differs from standard +5V-only variants. Confirm capacitor selection meets ESR requirements for stable charge-pump operation across the operating temperature range.

Drivers, Receivers, Transceivers Selection Notes

Select the MAX209ENG when a design requires two transmit channels and five receive channels but does not need the full internal charge pump generation for V-. This variant specifically relies on an external V+ supply between +9.0V and +13.2V. It is suitable for applications where power consumption must be minimized via shutdown modes while maintaining multiple receiver inputs for monitoring.

Drivers, Receivers, Transceivers Part Context

The MAX209 is part of the broader MAX200-MAX209/MAX211/MAX213 family of +5V RS-232 transceivers. While many family members generate both positive and negative voltages internally, the MAX209 is distinct in its requirement for an external positive supply rail. This places it between the fully integrated MAX202/MAX203 and the dual-supply MAX201 in terms of external component requirements.

Drivers, Receivers, Transceivers Replacement Considerations

Pin-compatible alternatives within the same family include the MAX201, which shares the dual-supply architecture but offers different driver/receiver counts. For designs requiring internal voltage generation, the MAX202 or MAX203 serve as functional replacements if the pin count and channel configuration align with the application needs.