MAX231CPD+

Overview

The MAX231CPD+ is a +5V-powered, multichannel RS-232 driver/receiver manufactured by Analog Devices/Maxim Integrated. It operates within a supply voltage range of 4.5V to 5.5V and supports data rates up to 120kb/s. The device features two drivers and two receivers for full-duplex communication. It utilizes an internal charge pump circuit requiring external capacitors to generate the necessary ±10V levels from a single +5V source. The component is housed in a PDIP-14 package and is designed for through-hole mounting.

Feature Summary

• Integrates dual charge-pump DC-DC converters to eliminate the need for bipolar ±12V power supplies
• Enables single-supply operation using only a +5V input
• Provides full-duplex RS-232 communication channels with TTL/CMOS compatible inputs and outputs

Applications

• Interface translation between TTL/CMOS logic and RS-232 standards
• Multidrop RS-232 network connections
• Portable diagnostics equipment requiring serial communication

Procurement Notes

Verify that the ordering suffix corresponds to the specified temperature grade and lead-free status. Confirm the package type matches the required PCB footprint. Ensure the component meets RoHS compliance requirements for the target assembly process. Cross-reference the manufacturer date code against current production status to avoid obsolete stock issues.

Selection Notes

Select this component when board space allows for external charge-pump capacitors but bipolar supplies are unavailable. Compare against integrated capacitor variants if minimizing component count is critical. Verify that the 120kb/s data rate satisfies the system's baud rate requirements. Check thermal dissipation limits for the specific operating environment.

Part Context

This part belongs to the MAX220–MAX249 family of line drivers and receivers. The family offers various configurations regarding channel counts and integrated versus external capacitance. The MAX231 specifically requires external capacitors for its charge pump operation, distinguishing it from fully integrated counterparts like the MAX233 or MAX235.

Replacement Considerations

Public confirmed substitute part numbers: MAX231ACPD+, MAX231EPC.