74LCX245SJ

Overview

The onsemi 74LCX245SJ is a low-voltage octal bus transceiver featuring non-inverting bidirectional buffers with three-state outputs. Designed for 2.3V to 3.6V VCC applications, it supports interfacing with 5V signal environments through 5V tolerant inputs and outputs. The device utilizes Direction (DIR) and Output Enable (OE) control pins to manage data flow direction and bus isolation. It incorporates patented noise reduction circuitry and active bus-hold logic to eliminate external pull-up requirements.

Feature Summary

• Provides five-volt tolerant input and output capabilities for mixed-voltage system interfacing
• Integrates patented noise and EMI reduction circuitry to minimize signal interference
• Includes active bus-hold logic to maintain valid logic levels without external components

Applications

• Bus-oriented data transmission in low-voltage electronic systems
• Mixed-voltage interface between 3.3V and 5V logic domains
• Live insertion or withdrawal support in hot-swap bus architectures

Procurement Notes

Verify the specific suffix SJ against official onsemi documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with required operating temperature ranges and voltage tolerances before procurement. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and current production status.

Selection Notes

Select this component when designing systems requiring bidirectional data transfer between buses operating at different voltage levels. The 74LCX245SJ is suitable for applications demanding low power dissipation and high-speed operation within the 2.3V to 3.6V supply range. Consider its 5V tolerance feature if interfacing directly with legacy 5V logic devices without additional level shifting.

Part Context

This device belongs to the 74LCX family of low-voltage CMOS logic integrated circuits manufactured by onsemi. The LCX series is engineered for high-speed performance while maintaining low power consumption, making it ideal for portable and battery-operated applications. As an octal transceiver, it provides eight independent channels for parallel data handling.

Replacement Considerations

Compatible substitutes include the 74LCXH2245SJ from onsemi, which adds series resistors to B-port outputs. Other equivalents may include the SN74LVC245AIPWREP from Texas Instruments or the TC74LCX245F from Toshiba, provided pinouts and electrical characteristics align with the design requirements.