FXMA108BQX

Translators, Level Shifters Overview

The FXMA108BQX is a dual-supply, 8-bit bidirectional voltage level translator manufactured by onsemi. It supports voltage translation between 1.65 V and 5.5 V with configurable supplies where the A port tracks VCCA and the B port tracks VCCB. The device features auto-direction sensing, eliminating the need for a direction control pin, and includes power-down protection that places outputs in a 3-state condition if either supply is removed. It operates within a temperature range of -40°C to +85°C and is packaged in a 20-terminal WQFN (2.5x4.5 mm).

Translators, Level Shifters Feature Summary

• Bi-directional interface capability between two logic levels ranging from 1.65 V to 5.5 V.
• Auto-direction sensing eliminates the requirement for an external direction control pin.
• Non-preferential power-up allows either VCC supply to be powered first while maintaining 3-state outputs.
• Integrated bus hold on data inputs removes the necessity for external pull-up resistors.

Translators, Level Shifters Applications

• Cell phones
• Personal Digital Assistants (PDA)
• Digital cameras
• Portable GPS devices
• Storage systems

Translators, Level Shifters Procurement Notes

Verify the specific package variant matches the design requirements, as the FXMA108 family includes different terminal counts. Confirm the operating temperature range aligns with system specifications, noting the -40°C to +85°C rating for this part. Ensure power sequencing protocols account for the non-preferential power-up feature and the /OE control input referencing VCCA to prevent bus contention during startup.

Translators, Level Shifters Selection Notes

Select this component when designing interfaces requiring automatic bi-directional translation without dedicated direction pins. It is suitable for applications needing simultaneous support for multiple voltage domains such as 1.8 V, 2.5 V, 3.3 V, and 5.0 V. The integrated bus hold feature simplifies board layout by removing external pull-up components. Verify that the required data throughput meets the application's speed constraints across the selected voltage combinations.

Translators, Level Shifters Part Context

The FXMA108 belongs to onsemi's configurable dual-voltage supply translator series. It is designed for uni-directional and bidirectional translation between logic levels. The device distinguishes itself through auto-direction sensing and power-down protection, ensuring safe operation during power transitions. It is commonly used in portable electronics and storage devices where space efficiency and low power consumption are critical design factors.

Translators, Level Shifters Replacement Considerations

Consult onsemi's cross-reference tools for compatible alternatives. Verify functional equivalence regarding voltage ranges, channel count, and package dimensions before substitution. Review datasheets to ensure replacement parts meet the same ESD protection levels and operating temperature specifications.

Translators, Level Shifters FAQ

Does the FXMA108 require a direction control pin?

No, the FXMA108 features auto-direction sensing capability that automatically detects input signals and transfers them to the other port without needing an external direction control pin.

How does the device handle power-down conditions?

Internal power-down control circuits place the outputs in a 3-state condition if either VCCA or VCCB is removed, preventing excessive current flow or oscillations.

What is the purpose of the bus hold feature?

The bus hold feature maintains valid output states in static mode and eliminates the need for external pull-up resistors on the data inputs.