MAX232N

Overview

The MAX232N is a dual driver and receiver RS-232 transceiver manufactured by Texas Instruments. It operates from a single 4.5 V to 5.5 V power supply, utilizing internal charge pumps to generate the necessary voltages for EIA-232 compliance without external bipolar supplies. The device supports full-duplex communication with a data rate of up to 120 kb/s. It features two drivers and two receivers, operating within a temperature range of -40°C to +85°C. The component draws a typical operating supply current of 10 mA and is housed in a 16-pin PDIP package.

Feature Summary

• Integrates dual drivers and dual receivers for complete RS-232 signal conversion on a single chip.
• Utilizes internal charge pump circuitry to derive required voltage levels from a single low-voltage supply.
• Provides robust ESD protection capabilities to safeguard against electrostatic discharge events.

Applications

• Serial port interfacing between microcontrollers and personal computers
• Modem connection circuits requiring RS-232 level translation
• Industrial control systems utilizing serial communication protocols

Procurement Notes

Verify the specific suffix 'N' confirms the PDIP-16 through-hole package variant when sourcing. Confirm RoHS compliance status as manufacturing specifications may evolve. Check for end-of-life notices or obsolescence warnings prior to finalizing procurement plans. Ensure the supplier provides official datasheets matching the Texas Instruments part number to guarantee functional equivalence.

Selection Notes

Select this component when through-hole mounting is required for prototyping or high-reliability applications. Choose the MAX232N over surface-mount variants if PCB layout constraints favor leaded packages. Verify that the 120 kb/s data rate meets system timing requirements. Ensure the design accommodates the four external capacitors needed for the internal charge pump operation.

Part Context

The MAX232N belongs to the broader MAX232 family of RS-232 transceivers. While other variants like MAX232DR offer surface-mount SOIC packaging, the N suffix specifically denotes the plastic dual in-line package. This family serves as a standard interface solution for legacy serial communication standards in embedded systems.

Replacement Considerations

MAX232IDG4: Surface-mount SOIC-16 equivalent with identical electrical characteristics. MAX232DR: Surface-mount SOIC-16 variant available in tape-and-reel packaging. SN75C3232: Higher speed alternative compatible with 3.3V logic levels.