MAX245CPL

Overview

The MAX245CPL is a multichannel RS-232 driver and receiver manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +5V power supply, eliminating the need for external negative voltage generators. The device features two drivers and two receivers, supporting data rates up to 120kbps. It utilizes Maxim’s TSSOP package technology to minimize external capacitor requirements. The component is designed for EIA/TIA-232-E and V.28/V.24 communications interfaces.

Feature Summary

• Single-supply operation eliminates the requirement for external charge pumps or negative voltage supplies.
• Integrated oscillator and charge pump circuitry reduce the number of required external components.
• TSSOP package technology allows for compact board space utilization with minimal passive components.

Applications

• Portable computers and notebook systems
• Modems and communication equipment
• Industrial control systems requiring serial data transmission

Procurement Notes

Verify the specific suffix CPL indicates the TSSOP-16 package variant. Confirm RoHS compliance status as older Maxim parts may differ. Check for obsolescence notices or PCN documents from Analog Devices. Ensure the source provides an official datasheet reference for electrical characteristics.

Selection Notes

Select this part when a single +5V supply is available and board space is limited. Compare against MAX232 variants if through-hole mounting is required. Verify that the 120kbps speed meets system timing requirements. Consider pinout compatibility with existing PCB layouts designed for standard RS-232 transceivers.

Part Context

The MAX245 belongs to the MAX220–MAX249 family of line drivers/receivers. This series is intended for applications where ±12V supplies are unavailable. The CPL suffix typically denotes the plastic thin-shrink small-outline package. It serves as a direct replacement for legacy dual-driver RS-232 transceivers in modern low-voltage designs.

Replacement Considerations

The MAX232CPE is a common alternative but requires different external capacitance values. The MAX245CN offers a DIP package option for through-hole applications. Verify functional equivalence regarding signal inversion and drive strength before substitution.