LTC1383IS#PBF

Drivers, Receivers, Transceivers Overview

The LTC1383IS#PBF is a low power RS232 transceiver manufactured by Analog Devices Inc. It operates from a single 5V supply and features two drivers and two receivers. The device supports data rates up to 120kBaud with a 2500pF, 3kΩ load. Supply current is 220µA unloaded at 0°C to 70°C, and 350µA unloaded at -40°C to 85°C. Driver output voltage swings range from +5.0V to +7.0V and -5.0V to -6.5V. Receiver input thresholds are 0.8V to 1.3V for low and 1.7V to 2.4V for high. The component is housed in a 16-lead SOIC narrow package and functions within an operating temperature range of -40°C to 85°C.

Drivers, Receivers, Transceivers Feature Summary

• Ultra-low power operation with minimal quiescent supply current
• Integrated charge pump requiring only four small 0.1µF capacitors
• Robust protection against overvoltage and electrostatic discharge on I/O lines
• TTL/CMOS compatible logic inputs and outputs

Drivers, Receivers, Transceivers Applications

• Notebook computers
• Palmtop computers

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix IS indicates the industrial temperature grade (-40°C to 85°C) compared to the commercial C variant (0°C to 70°C). Confirm the #PBF designation ensures lead-free compliance and RoHS adherence as per manufacturer standards. Cross-reference the 16-lead SOIC narrow package dimensions during PCB layout to ensure mechanical fit.

Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems requiring ultra-low power consumption from a single 5V source. It serves as a direct pin-compatible replacement for LT1181A and MAX232A devices. Ensure external capacitors have effective series resistance below 2Ω to maintain charge pump efficiency. Consider the 120kBaud maximum speed limit when evaluating higher baud rate requirements.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC1383 family of RS232 interface integrated circuits. It shares architectural similarities with the LTC1382, which includes a shutdown mode, and the LTC1384, which keeps receivers active during shutdown. Unlike the LTC1385 and LTC1386, which operate at 3.3V, this model is optimized specifically for 5V applications.

Drivers, Receivers, Transceivers Replacement Considerations

The datasheet explicitly lists the LT1181A and MAX232A as pin-compatible alternatives. Designers should verify that substitute components meet the same ±10kV ESD protection and ±25V overvoltage tolerance specifications required by the application.