SN74HCS4075DR

Inverter Gates Overview

The SN74HCS4075DR is a triple 3-input OR gate with Schmitt-trigger inputs manufactured by Texas Instruments. It operates within a supply voltage range of 2V to 6V and supports an ambient temperature range from -40°C to +125°C. The device features balanced CMOS push-pull outputs capable of ±7.8mA drive current at 5V. It utilizes Schmitt-trigger architecture for noise rejection and slow input tolerance, with typical supply current of 100nA and input leakage of ±100nA.

Inverter Gates Feature Summary

• Schmitt-trigger inputs provide hysteresis for effective noise rejection and tolerance to slow signal transitions.
• Balanced CMOS push-pull outputs deliver symmetric sourcing and sinking capabilities for fast edge generation into light loads.
• Low power consumption design ensures minimal static current draw during operation.

Inverter Gates Applications

• Monitoring error signals using fewer logic inputs
• Combining active-low enable signals
• Directly controlling fan driver enable pins based on multiple overheat conditions

Inverter Gates Procurement Notes

Verify the specific package type against the datasheet orderable addendum, as the SN74HCS4075 series includes both SOIC and TSSOP variants. Confirm that the 'DR' suffix corresponds to the SOIC-14 package configuration required for your PCB layout. Ensure compatibility with the specified operating voltage and temperature ranges for your target application environment.

Inverter Gates Selection Notes

Select this component when designing circuits requiring robust noise immunity or handling slow-rising input signals. The Schmitt-trigger inputs eliminate the need for strict transition rate requirements found in standard CMOS devices. Consider the extended temperature range and low power characteristics for applications where thermal management and energy efficiency are critical constraints.

Inverter Gates Part Context

This device belongs to the HCS (High-Speed CMOS) logic family, which combines high-speed performance with low power consumption. Unlike standard HC logic, the HCS series incorporates Schmitt-trigger inputs to improve noise margins. The SN74HCS4075 specifically provides three independent 3-input OR gates, offering flexibility in combining multiple signals into a single output line.

Inverter Gates Replacement Considerations

SN74HCS4075PWR is a functional equivalent available in a TSSOP-14 package instead of the SOIC-14 package used by the DR variant. Both parts share identical electrical specifications and pinouts, allowing for potential board redesign if space constraints require the smaller TSSOP footprint.

Inverter Gates FAQ

How does the Schmitt-trigger input benefit signal integrity?

The Schmitt-trigger architecture introduces hysteresis, defined by the difference between positive and negative switching thresholds. This feature allows the device to tolerate slow input transitions and reject noise without causing erratic output switching.

What happens if unused inputs are left floating?

Unused inputs must not be left floating. They should be tied to either VCC or ground to prevent undefined operational states and excessive power consumption caused by the high impedance of CMOS inputs.