SN74LS245DWG4

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LS245DWG4 is an octal bus transceiver utilizing Schottky transistor logic, designed for asynchronous two-way communication between data buses. It features 3-state outputs that drive bus lines directly and PNP inputs to reduce DC loading. The device includes hysteresis at bus inputs to improve noise margins. Typical propagation delay times from port to port are 8 ns. It operates within a supply voltage range of 4.75 V to 5.25 V and supports an operating free-air temperature range of 0°C to 70°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• 3-State Outputs Drive Bus Lines Directly
• PNP Inputs Reduce DC Loading on Bus Lines
• Hysteresis at Bus Inputs Improves Noise Margins

Buffers, Drivers, Receivers, Transceivers Applications

• Building Automation
• Electronic Point of Sale
• Factory Automation and Control
• Test and Measurement

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'G4' against the latest Texas Instruments Package Option Addendum to confirm current production status and RoHS compliance details. Ensure the SOIC-20 package dimensions match the design constraints. Confirm availability as the base model SN74LS245DW is listed as obsolete in some documentation, while the reel version may be active.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when high drive strength is required for ribbon cables or backplane buses. The SN74LS245 provides superior current sourcing and sinking capabilities compared to standard logic families. Consider the thermal resistance characteristics of the SOIC package if multiple devices are used in close proximity. Ensure input signals meet the specified VIH and VIL requirements for reliable operation.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SNx4LS245 family of octal bus transceivers with 3-state outputs. It shares common pinouts and direction select pins with other variants in the series. The device allows bidirectional data transmission controlled by a DIR input and isolation via an active-low OE input. It is part of the legacy LS logic family known for robust drive capabilities.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74LS245DWR

Buffers, Drivers, Receivers, Transceivers FAQ

How does the device handle unused channels?

Unused channels must be terminated properly to prevent floating inputs. Both sides of the unused channel should be tied to the same logic level (GND or VCC) to ensure correct operation.

What is the function of the DIR pin?

The DIR pin controls signal direction. A Low level enables transmission from B to A, while a High level enables transmission from A to B.