LTC1385ISW#TRPBF

Drivers, Receivers, Transceivers Overview

The LTC1385ISW#TRPBF is a 2-driver/2-receiver EIA/TIA-562 transceiver operating from a single 3.3V supply in an 18-lead SOIC package. It supports data rates up to 120kbaud with a quiescent current of 200mA, dropping to 35mA in Driver Disable mode and 0.2mA in Shutdown mode. The internal charge pump requires four 0.1µF capacitors. Receiver inputs withstand –25V without damage, and the device offers –10kV ESD protection.

Drivers, Receivers, Transceivers Feature Summary

• Ultra-low power operation with dedicated Driver Disable and Shutdown modes for significant current reduction
• Integrated charge pump requiring only four small 0.1µF external capacitors
• Robust I/O lines capable of withstanding –25V overvoltage without damage
• High ESD protection rating of –10kV on driver outputs and receiver inputs

Drivers, Receivers, Transceivers Applications

• Notebook computers
• Palmtop computers

Drivers, Receivers, Transceivers Procurement Notes

Verify the suffix #TRPBF indicates tape-and-reel packaging and lead-free compliance. Confirm the 'I' grade designation matches the required industrial temperature range of –40°C to 85°C. Ensure the 18-lead SOIC footprint aligns with the target PCB layout specifications before finalizing procurement orders.

Drivers, Receivers, Transceivers Selection Notes

Select this component when a 3.3V single-supply RS-562 interface is required with minimal external capacitance. It is suitable for portable applications where low standby current is critical. Verify that the 120kbaud maximum speed meets system timing requirements and that the 18-lead SOIC package fits the available board space constraints.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC1385 family of ultra-low power RS-562 transceivers. It serves as a direct replacement for the LT1180A in many designs while offering improved power efficiency at 3.3V. The ISW variant specifically denotes the industrial temperature range and wide SOIC package configuration within the broader product line.

Drivers, Receivers, Transceivers Replacement Considerations

The datasheet lists the LT1180A as pin-compatible. Other related parts include the LTC1386 (narrow 16-pin) and LTC1327 (3 drivers). Verify package dimensions and voltage levels when substituting with these alternatives.

Drivers, Receivers, Transceivers FAQ

How does the Driver Disable mode differ from Shutdown mode?

In Driver Disable mode, the charge pump turns off and drivers go high-impedance, but receivers remain active with 35mA current. In Shutdown mode, all functions turn off, reducing current to 0.2mA.

What is the maximum input voltage the receiver can handle?

Receiver inputs can be forced to –25V without damage, providing robust protection against overvoltage conditions on the communication line.

What external components are required for the charge pump?

The device requires four 0.1µF capacitors for the charge pump commutation and storage, minimizing the overall solution size.