74LVQ125SJX

Overview

The onsemi 74LVQ125SJX is a low voltage quad buffer with three-state outputs, manufactured by Fairchild Semiconductor. It operates within a supply voltage range of 2.0V to 3.6V and supports an operating temperature from -40°C to +85°C. The device features four independent non-inverting buffers in a 14-lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm wide. Key electrical characteristics include a maximum quiescent supply current of 40.0 µA at 3.6V, output drive capabilities of ±12 mA, and propagation delays ranging from 1.0 ns to 14.0 ns depending on voltage and load conditions.

Feature Summary

• Designed for low power and low noise applications in 3.3V systems
• Guarantees simultaneous switching noise levels and dynamic threshold performance
• Ensures pin-to-pin skew AC performance for signal integrity
• Supports incident wave switching into transmission lines with impedances as low as 75 Ω

Applications

• Low power/low noise 3.3V applications
• High-speed data bus buffering
• Signal line drivers requiring controlled impedance matching

Procurement Notes

Verify the specific package variant, as the 'SJ' suffix denotes the 14-lead SOP (EIAJ TYPE II, 5.3mm wide). Confirm that the component meets the required operating temperature range of -40°C to +85°C. Check datasheet notes regarding unused inputs, which must be held HIGH or LOW and may not float. Ensure compatibility with the specified supply voltage limits of 2.0V to 3.6V before integration.

Selection Notes

Select this component when low voltage operation between 2.0V and 3.6V is required alongside high-speed buffering capabilities. The 74LVQ125SJX is suitable for designs needing guaranteed pin-to-pin skew and incident wave switching performance. Consider the 14-lead SOP package constraints if space is limited. Compare against LVX or LVTH series variants if different drive strengths or logic families are preferred.

Part Context

The 74LVQ125 belongs to the LVQ family of low voltage CMOS logic devices. It is functionally similar to other quad buffers like the 74LCX125 but optimized for specific low-voltage noise and switching characteristics. The device was originally produced by Fairchild Semiconductor, which has since been acquired by onsemi. It serves as a standard interface buffer in digital circuits requiring three-state control.

Replacement Considerations

Direct replacements include the 74LVQ125SC (SOIC package) or 74LVQ125MTCX (TSSOP package) for pin-compatible alternatives. Other compatible parts from different manufacturers may include SN74LV125AD or MC74LVX125DG, though electrical parameters and package dimensions should be verified against the original specifications.