DS3695AM

Overview

The DS3695AM is a multipoint RS-485/RS-422 transceiver manufactured by Texas Instruments. It operates on a single +5V supply and meets EIA standard RS-485 requirements with an extended common mode range of -7V to +12V, allowing up to ±7V ground difference between devices. The device features TRI-STATE outputs, thermal shutdown protection, and high impedance to the bus when powered off or in TRI-STATE. It supports up to 32 transceivers on the bus due to low combined driver/receiver impedance. Typical receiver hysteresis is 70 mV, and driver propagation delay is 15 ns with 2 ns skew.

Feature Summary

• Extended common mode range supporting significant ground differences between bus devices
• TRI-STATE capability for both driver and receiver outputs across the full common mode range
• Thermal shutdown circuitry that forces driver outputs into a high-impedance state during excessive power dissipation
• High impedance to the bus when the driver is disabled or power is removed, enabling unused devices to be powered down

Applications

• Multipoint data transmission systems requiring RS-485 compliance
• Industrial networks where devices may experience significant ground potential differences
• Bus architectures requiring thermal fault protection and high noise immunity

Procurement Notes

Verify the specific suffix against the official datasheet to confirm temperature range and package type. Confirm current availability status as older revisions may be discontinued or subject to lifetime buy periods. Ensure the ordering part number matches the required commercial or industrial operating temperature specifications.

Selection Notes

Select this component for applications requiring robust performance under large ground potential differences. Verify that the system voltage remains within the 4.75V to 5.25V recommended operating range. Consider the thermal shutdown feature if the application environment poses risks of excessive power dissipation or short circuits on the bus lines.

Part Context

The DS3695AM belongs to the DS3695 family of multipoint transceivers and repeaters from Texas Instruments. This series includes variants such as the DS3695T, DS3696, and DS3697, which share similar core functionalities but may differ in pinouts or additional features like thermal shutdown reporting pins.

Replacement Considerations

DS3695N/NOPB

FAQ

What is the typical receiver hysteresis value?

The typical receiver hysteresis is 70 mV.

How does the device handle thermal faults?

A thermal shutdown circuit triggers when excessive power dissipation occurs, forcing the driver outputs into a high-impedance state.

What is the maximum number of transceivers supported on the bus?

The combined impedance of the driver output and receiver input is less than one RS-485 unit load, allowing up to 32 transceivers on the bus.