MAX3232IDR

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The MAX3232IDR is a high-performance, low-power transceiver for RS-232 and V.28 communications. It combines a low-power transceiver with an interface circuit and a +/-15 kV ESD-protected, 0.1-µF charge-pump output. This transceiver is ideal for battery-powered applications where an external charge pump or negative voltage generator is not required.

The MAX3232IDR transceiver is designed to satisfy the requirements of EIA/TIA-232-F and ITU V.28 specifications. It operates from a single 3 V to 5.5 V power supply and features a 3.0-V to 5.5-V ± 15-kV ESD-protected charge-pump output. The device has a fast 460-kbps line rate, low 0.2-µA supply current, and high data-dependent output drive of up to 35 mA. Additionally, the MAX3232IDR features an improved data skew of 10 ns for maximum data integrity. The MAX3232IDR simplifies system complexity, conserves power, reduces EMI and RF interference, and defends against damage from electrostatic discharges.

Application Fields

The MAX3232IDR is suitable for use in a wide range of applications, such as battery operated systems in personal digital assistants (PDAs), point-of-sale (POS) terminals, medical/industrial instruments, bar-coding readers, modems and hand-held devices. It is used in applications that require low-power consumption, robust design and high data rates.

Working Principle

The MAX3232IDR is a dual transceiver that provides full-duplex operation for balanced communications applications. It is designed to allow unbalanced signals to interface with balanced communications equipment. The MAX3232IDR features a charge-pump output that generates a negative output voltage (VOSN) and a positive output voltage (VOSP). The negative output voltage is used to provide automatic level shifting for RS-232 modules that require voltage levels that do not exceed 0 V. The MAX3232IDR also features data-dependent output drive allowing the outputs to drive up to 35 mA.

The MAX3232IDR is protected against electrostatic discharge by a ± 15 kV ESD protection. The device also features a wide -7 V to +12 V common-mode voltage range, which eliminates the need for external level translators in systems with multiple voltage levels. Additionally, the MAX3232IDR features low power consumption and a fast 460-kbps line rate, allowing it to operate efficiently in battery-powered systems.

In summary, the MAX3232IDR is a high-performance, low-power transceiver for RS-232 and V.28 communications. It is a dual transceiver that provides full-duplex operation for balanced communications applications and it is protected against electrostatic discharge. It is suitable for use in a wide range of applications and it features a wide -7 V to +12 V common-mode voltage range, a fast 460-kbps line rate, low power consumption and data-dependent output drive. The MAX3232IDR simplifies system complexity and reduces EMI and RF interference, while providing an improved data skew of 10 ns for maximum data integrity.

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