74LCX245MSAX

Overview

The onsemi 74LCX245MSAX is an octal bus transceiver belonging to the 74LCX logic family. It features eight bidirectional channels with three-state outputs, enabling data transfer between two buses. The device operates within a supply voltage range of 2.0 V to 3.6 V and supports LVTTL or TTL input levels while providing LVCMOS output levels. Key electrical specifications include a propagation delay of 9.5 ns, low-level output current of 24 mA, and high-level output current of -24 mA. It is housed in an SSOP-24 package and functions across an operating temperature range of -40°C to +85°C.

Feature Summary

• Provides bidirectional data transmission via eight independent channels controlled by direction and enable signals.
• Features three-state outputs that allow connection to shared bus structures without signal interference.
• Supports direct interface between LVTTL/TTL inputs and LVCMOS outputs for mixed-voltage system compatibility.

Applications

• Mobile communication equipment
• Personal digital assistants (PDAs)
• Handheld terminals

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm RoHS compliance status as indicated in official documentation. Ensure storage conditions meet moisture sensitivity level requirements prior to soldering. Validate package integrity against the specified SSOP-24 form factor. Cross-reference ordering suffixes to ensure exact functional match with design specifications.

Selection Notes

Select this component when designing systems requiring bidirectional data flow between different voltage domains. The 74LCX series offers lower power consumption compared to older CMOS technologies. Ensure the application voltage remains within the 2V to 3.6V range. Consider the SSOP-24 package constraints for PCB layout. Verify that the 9.5 ns propagation delay meets the timing requirements of the target bus architecture.

Part Context

This part belongs to the 74LCX family of low-voltage CMOS logic devices manufactured by onsemi. These components are designed for high-speed applications requiring low power dissipation. The 74LCX245 variant specifically addresses the need for octal bus transceivers in portable electronics. It complements other LCX logic gates used in memory interfaces and control circuits.

Replacement Considerations

Check for equivalent parts from other manufacturers such as NXP or Texas Instruments offering similar pinouts and electrical characteristics. Verify that any substitute maintains the same 2V-3.6V operating range and SSOP-24 package dimensions. Ensure the replacement also supports LVTTL/TTL inputs and LVCMOS outputs for compatibility.