74LCX2244MSA

Overview

The onsemi 74LCX2244MSA is a low-voltage CMOS octal buffer with 3-state, non-inverting outputs and integrated 26Ω series resistors. It operates within a supply voltage range of 2.0V to 3.6V, featuring 5V tolerant inputs and outputs for interfacing with 5V signal environments. The device provides a maximum propagation delay of 7.5ns at 3.3V and supports output drive currents up to ±12mA at 3.0V. Packaged in a 20-lead SSOP (M20B), it ensures high-speed operation with low power dissipation.

Feature Summary

• Integrates 26Ω series resistors in the outputs to reduce overshoot and undershoot.
• Provides 5V tolerant inputs and outputs for safe interfacing with 5V signal environments.
• Supports live insertion and withdrawal capabilities during system operation.
• Features patented noise and EMI reduction circuitry for improved signal integrity.

Applications

• Memory address driver
• Clock driver
• Bus-oriented transmitter/receiver

Procurement Notes

Verify the specific ordering code suffix to confirm package type, as the LCX2244 family includes SOIC, SOP, DQFN, SSOP, and TSSOP variants. Confirm RoHS compliance status and check for lead-free packaging specifications. Ensure the selected variant matches the required JEDEC or EIAJ package dimensions for PCB layout compatibility.

Selection Notes

Select this component when 5V tolerance is required alongside low-voltage operation. The integrated 26Ω series resistors make it suitable for applications needing reduced signal ringing without external components. Compare propagation delays and output drive strengths against standard buffers if higher current capability is needed.

Part Context

This part belongs to the 74LCX logic family, designed for low-voltage digital applications. It functions as an octal buffer, providing eight independent channels within a single package. The device utilizes advanced CMOS technology to balance high-speed performance with low static power consumption.

Replacement Considerations

Direct substitutes include the 74LCX244, which lacks the internal series resistors but shares similar electrical characteristics. Verify pinout compatibility and ensure the replacement maintains the required 5V tolerance and 3-state functionality for the specific application design.

FAQ

What is the function of the internal 26Ω resistors?

The 26Ω series resistors are integrated into the outputs to help reduce output overshoot and undershoot, improving signal integrity.

Can this device interface with 5V signals?

Yes, the 74LCX2244 features 5V tolerant inputs and outputs, allowing it to safely interface with 5V signal environments while operating at lower supply voltages.