74LVX4245QSC

Translators, Level Shifters Overview

The onsemi 74LVX4245QSC is an 8-bit dual-supply translating transceiver with 3-state outputs, designed for mixed voltage environments. It interfaces between a 5V bus (A Port) and a 3V bus (B Port). The device operates with VCCA from 4.5V to 5.5V and VCCB from 2.7V to 3.6V. It features bidirectional data flow controlled by Transmit/Receive and Output Enable inputs. Outputs source/sink 24 mA at the 5V bus and 12 mA at the 3V bus. Propagation delay is typically 5.1 ns A-to-B and 5.4 ns B-to-A at +25°C. It is housed in a 24-Lead Quarter Size Outline Package (QSOP).

Translators, Level Shifters Feature Summary

• Bidirectional interface capability between 5V and 3V buses.
• Control inputs compatible with TTL levels.
• Implements patented EMI reduction circuitry.
• Functionally compatible with the 74 series 245.

Translators, Level Shifters Applications

• Mixed mode dual supply interface solutions.
• Laptop computers using 3.3V CPUs and 5V LCD displays.
• Interfacing low voltage CPU local buses with standard 5V I/O level peripherals.

Translators, Level Shifters Procurement Notes

Verify the specific package type and ordering suffix when sourcing this component. Confirm that the part number matches the exact QSOP variant required for your design. Check current availability status as manufacturing transitions may affect stock levels. Ensure compliance with RoHS standards if applicable to your project requirements.

Translators, Level Shifters Selection Notes

Select this transceiver when interfacing 5V logic with 3V logic systems requiring bidirectional data transfer. It is suitable for applications needing simultaneous switching noise control and EMI reduction. Consider its pin compatibility with standard 74 series 245 devices for easy board layout reuse. Verify power-up sequencing requirements to prevent bus contention during system initialization.

Translators, Level Shifters Part Context

This component belongs to the LVX family of low-voltage CMOS translating transceivers manufactured by ON Semiconductor. It serves as a bridge between different voltage domains, specifically 5V and 3V systems. The device is functionally equivalent to the 74LVX4245 but packaged in a QSOP format. It is widely used in portable electronics where space constraints and mixed voltage levels are common design challenges.

Translators, Level Shifters Replacement Considerations

Check for direct replacements within the same LVX family or functionally compatible 74 series 245 variants. Ensure any substitute supports dual-supply operation and maintains similar propagation delays. Verify package compatibility or adaptability if the replacement uses a different footprint.

Translators, Level Shifters FAQ

How does the 74LVX4245QSC handle power-up sequences?

To prevent bus contention, VCCA should power up first, followed by VCCB. The OE and T/R pins should ramp with or ahead of VCCA to ensure proper configuration.

What is the maximum output current capability?

The outputs can source and sink 24 mA at the 5V bus and 12 mA at the 3V bus.