SN74HC244NSR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HC244NSR is an octal buffer and line driver featuring 3-state outputs, manufactured by Texas Instruments. It operates within a supply voltage range of 2V to 6V and supports an operating temperature from -40°C to 125°C. The device provides high-current outputs capable of driving up to 15 LSTTL loads with ±6mA drive at 5V. Typical propagation delay is 11ns. Maximum quiescent current (ICC) is 80µA, and maximum input current is 1µA. It is housed in a 20-pin SOP package.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal buffering architecture organized as two independent 4-bit buffers with separate output-enable inputs for flexible bus management.
• High-drive capability designed to improve performance and density in memory address drivers, clock drivers, and bus-oriented receivers.
• Standard CMOS inputs ensure low power consumption and high noise immunity while maintaining compatibility with standard logic families.

Buffers, Drivers, Receivers, Transceivers Applications

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

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'NSR' corresponds to the SOP-20 package and tape-and-reel carrier configuration on official Texas Instruments documentation. Confirm the operating temperature grade matches the -40°C to 125°C specification for the SN74 series variant. Ensure ESD handling precautions are followed during assembly due to CMOS sensitivity.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems requiring octal data buffering with tri-state control for bus isolation. It is suitable for applications needing high fan-out capabilities, such as driving multiple LSTTL loads or long PCB traces. Consider the 2V to 6V supply range for compatibility with various logic levels in industrial or telecom environments.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SNx4HC244 family of octal buffers and line drivers. The SN74 variant specifies commercial/industrial temperature ranges compared to the military-grade SN54 series. The NSR designation indicates the specific SOP-20 packaging and reel quantity format offered by Texas Instruments for surface-mount assembly.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74HC244DW

Buffers, Drivers, Receivers, Transceivers FAQ

How does the output enable pin function affect the state of the outputs?

When the Output Enable (OE) pin is low, the device passes non-inverted data from the A inputs to the Y outputs. When OE is high, all outputs enter a high-impedance state, effectively disconnecting them from the bus.

What is the recommended handling for unused inputs on this device?

Unused inputs must not be left floating. They should be tied to VCC or GND to ensure proper operation and prevent excessive power consumption or oscillations caused by slow signal transitions.