HIN234IB

Overview

The HIN234IB is a single RS-232 transmitter and receiver interface circuit manufactured by Harris Corporation. Designed for single +5V power supply operation, it integrates onboard charge pump voltage converters to generate the necessary positive and negative supplies from the input voltage. The device meets EIA RS-232E and V.28 specifications, supporting data rates up to 120 kbit/s. It requires external 0.1µF capacitors for the charge pump. The component features three-state TTL/CMOS compatible outputs and inputs with hysteresis for noise rejection, housed in an 8-SOIC package.

Feature Summary

• Integrates onboard charge pump voltage converters to generate required bipolar supplies from a single +5V source
• Supports data transmission rates up to 120 kbit/s while meeting EIA RS-232E and V.28 standards
• Features three-state outputs compatible with TTL and CMOS logic families

Applications

• Single-port serial communication interfaces in computer systems
• Data links for peripheral devices such as printers and terminals
• Serial connectivity in portable and laptop computers where space is limited

Procurement Notes

Verify the manufacturer origin, as Harris Corporation assets were acquired by Renesas Electronics. Confirm the specific suffix 'IB' corresponds to the industrial temperature range and SOIC package variant. Ensure documentation references the correct datasheet version associated with the original Harris publication or subsequent Renesas updates to guarantee parameter accuracy.

Selection Notes

Select this component when a single-channel RS-232 link is required within a system constrained to a +5V power rail. It is suitable for designs needing minimal external passive components compared to older solutions requiring dual supplies. Consider the 120 kbit/s speed limit and the requirement for 0.1µF external capacitors during layout planning.

Part Context

The HIN234IB belongs to the HIN200-HIN213 family of RS-232 transceivers developed by Harris Corporation. This family was designed to simplify RS-232 interface design by eliminating the need for external dual-voltage power supplies. The series offers various combinations of drivers and receivers to accommodate different port requirements.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.