SN74HC244DBR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HC244DBR is an octal buffer and line driver featuring three-state outputs, manufactured by Texas Instruments. It operates within a supply voltage range of 2V to 6V. The device contains two independent 4-bit buffers with separate output-enable inputs. Electrical characteristics include a maximum static current of 80µA at 6V and high-current outputs capable of driving up to 15 LSTTL loads. Propagation delay varies from 11ns to 165ns depending on voltage and load capacitance. It is housed in a 20-pin SSOP package.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Provides non-inverting data transfer from A inputs to Y outputs when enabled
• Outputs enter high-impedance state when output-enable inputs are high
• Designed for bus-oriented receivers, transmitters, and memory address drivers

Buffers, Drivers, Receivers, Transceivers Applications

• Servers
• LED Displays
• Network Switches
• Telecom Infrastructure
• Motor Drivers

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'DBR' corresponds to the SSOP-20 package and tape-and-reel carrier configuration. Confirm the operating temperature range matches system requirements, as datasheet revisions indicate variations between -40°C to 85°C and -40°C to 125°C. Ensure input signals transition quickly to prevent excessive power consumption or oscillation due to standard CMOS input characteristics.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring high-drive capability and bus isolation. The dual 4-bit organization allows independent control of two banks via separate OE pins. Consider the propagation delay specifications relative to the system clock speed and load capacitance. Ensure unused inputs are terminated to VCC or GND to maintain proper device operation and avoid floating states.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SNx4HC244 family of octal buffers and line drivers with 3-state outputs. The family includes variants with different packages such as SOIC, PDIP, and TSSOP. The HC logic series utilizes high-speed CMOS technology, offering improved performance and density compared to older logic families while maintaining compatibility with standard CMOS input levels.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74HC244DWE4 (SOIC-20 package)

Buffers, Drivers, Receivers, Transceivers FAQ

How are the outputs controlled?

The device has two output-enable (OE) inputs. When an OE pin is low, the corresponding four outputs pass non-inverted data. When high, those outputs enter a high-impedance state.

What happens if inputs are left floating?

Standard CMOS inputs require defined logic levels. Leaving inputs floating can cause excessive power consumption and oscillation. Unused inputs must be tied to VCC or GND.