DS3696N/NOPB

Overview

The DS3696N/NOPB is a high-speed differential transceiver designed for multipoint bus transmission, meeting EIA standard RS-485 requirements and maintaining compatibility with RS-422 standards. It operates on a single +5V supply and features TRI-STATE outputs over an extended common mode range of -7V to +12V. The device incorporates thermal shutdown protection and maintains high impedance to the bus when powered off or in TRI-STATE mode. Key electrical parameters include a typical driver propagation delay of 15 ns with 2 ns skew, a receiver hysteresis of 70 mV, and a combined driver output and receiver input impedance of less than one RS-485 unit load.

Feature Summary

• Extended common mode range supporting up to ±7V ground difference between devices on the bus
• Thermal shutdown circuitry that forces driver outputs into a high-impedance state upon excessive power dissipation
• Dedicated open-collector TS pin providing a fault signal for wire OR-ing multiple device line faults
• High impedance to the bus during power-off conditions, allowing unused devices to be powered down

Applications

• Multipoint data transmission networks requiring RS-485 compliance
• Industrial control systems utilizing differential bus architectures
• Communication interfaces where ground potential differences between nodes are expected

Procurement Notes

Verify component authenticity through authorized channels as the datasheet indicates LIFEBUY status. Confirm package integrity and marking accuracy against the specified PDIP-8 form factor. Ensure environmental compliance documentation matches project requirements prior to final procurement decisions.

Selection Notes

Select this component for applications requiring robust fault reporting via the dedicated TS pin. Consider the specific operating temperature range and supply voltage stability when designing the power distribution network. Evaluate the need for TRI-STATE isolation capabilities relative to other bus nodes in the system architecture.

Part Context

This part belongs to the DS3695/DS3696/DS3697 family of multipoint RS-485/RS-422 transceivers manufactured by Texas Instruments. It shares core functional specifications with the DS3695 but includes unique diagnostic features such as the thermal shutdown indicator pin.

Replacement Considerations

Public confirmed substitute part numbers: DS3695N/NOPB, DS3697N/NOPB.

FAQ

What is the function of the TS pin on the DS3696?

The TS pin is an open-collector output with an internal 10 kΩ pull-up resistor that reports the occurrence of thermal shutdown within the device.

How does the DS3696 handle ground differences between devices?

It supports a bus common mode range of -7V to +12V, permitting up to a ±7V ground difference between devices connected to the bus.

What happens to the driver outputs during thermal shutdown?

The thermal shutdown circuit forces the driver outputs into the high-impedance state to prevent excessive power dissipation within the device.