SN74HCT245DGSR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HCT245DGSR is an octal bus transceiver with three-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and features TTL-voltage compatible inputs. The device provides high-current outputs capable of driving up to 15 LSTTL loads, with balanced output drive of ±6 mA at 5 V. Typical propagation delay is 14 ns. It supports asynchronous two-way communication between data buses via direction control (DIR) and active-low output enable (OE). The component is housed in a 20-pin VSSOP package.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Bidirectional data transmission between A and B buses controlled by DIR input
• High-current three-state outputs for direct bus line driving
• TTL-voltage compatible inputs with low static power consumption

Buffers, Drivers, Receivers, Transceivers Applications

• Factory automation and control systems
• Grid infrastructure equipment
• Electronic point-of-sale terminals
• Multi-function printers
• Motor drives and storage devices

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'DGSR' corresponds to the VSSOP-20 package and large tape-and-reel carrier configuration. Confirm the operating temperature range matches the application requirements, as this variant supports -40°C to +125°C. Ensure compatibility with standard surface-mount assembly processes and check for RoHS compliance status on the official datasheet.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when interfacing 5-V logic systems requiring bidirectional data transfer. It is suitable for applications needing isolation or increased drive strength for ribbon cables and backplanes. Consider the VSSOP package size for space-constrained designs. Verify that the TTL-compatible input thresholds align with the source logic family voltages.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SNx4HCT245 family of octal bus transceivers. The HCT series utilizes CMOS technology with TTL-compatible inputs, bridging older logic standards with modern low-power designs. The DGSR suffix indicates a specific commercial-grade temperature range and packaging format distinct from industrial or military variants like the SN54HCT245.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74HCT245DWR

Buffers, Drivers, Receivers, Transceivers FAQ

How is the data direction controlled?

Data direction is determined by the logic level at the DIR input. A high level directs data from the A bus to the B bus, while a low level directs data from the B bus to the A bus.

What is the function of the OE pin?

The Output Enable (OE) pin is active-low. When asserted low, the device is enabled for data transmission. When high, all ports enter a high-impedance state, effectively isolating the buses.