DS3691MX

Overview

The DS3691MX is a low-power Schottky TTL line driver manufactured by Texas Instruments, designed to meet EIA RS-422 and RS-423 standards. It features TRI-STATE outputs with high source and sink current capability and internal short circuit protection for both source and sink outputs. The device supports dual RS-422 differential drivers when the mode pin is low, or quad RS-423 single-ended drivers when the mode pin is high. A dedicated rise time control pin allows external capacitor connection to slow signal transitions, suppressing near-end crosstalk in single-ended modes. It operates within a supply voltage range of 4.75V to 5.25V and functions across an operating temperature range of 0°C to +70°C.

Feature Summary

• Configurable operation as either dual differential RS-422 drivers or quad single-ended RS-423 drivers via a mode select pin
• TRI-STATE output capability with ±10V common-mode range in disable mode
• Internal short circuit protection for both source and sink outputs
• External rise time control pin for waveshaping and crosstalk suppression

Applications

• RS-422 point-to-point communication interfaces
• Fully loaded RS-422 multipoint networks
• RS-423 single-ended data transmission systems
• Industrial serial communication buses requiring TRI-STATE isolation

Procurement Notes

Verify the specific suffix 'MX' against the latest TI Package Option Addendum to confirm active status and lead finish specifications. Ensure the application environment remains within the 0°C to +70°C operating temperature range defined for this variant. Confirm that the SOIC-16 package dimensions align with the target PCB footprint requirements before finalizing procurement orders.

Selection Notes

Select the DS3691MX when designing systems requiring compatibility with AM26LS30 pinouts while needing configurable RS-422 or RS-423 functionality. This component is suitable for applications demanding low power consumption with typical ICC values of 9 mA per driver in RS-422 mode. Consider the external rise time control feature if signal integrity issues related to near-end crosstalk are present in single-ended configurations.

Part Context

The DS3691MX belongs to the DS3691 family of line drivers produced by Texas Instruments. It serves as a direct pin-compatible alternative to the AM26LS30, offering identical physical connectivity while providing flexible mode selection between differential and single-ended operations. The device represents a standard solution for legacy and modern serial interface designs requiring robust drive capabilities and electrical isolation.

Replacement Considerations

The DS3691M is the non-NOPB equivalent of this part number. Both variants share identical electrical characteristics and pinouts. Verify RoHS compliance requirements; the NOPB suffix indicates Green (RoHS & no Sb/Br) material composition, whereas the base MX suffix may have different environmental classifications.