SN74HCS21PWR

Inverter Gates Overview

The SN74HCS21PWR is a dual 4-input AND gate with Schmitt-trigger inputs in a 14-pin TSSOP package. It operates from 2 V to 6 V and supports an ambient temperature range of -40°C to +125°C. The device features balanced CMOS push-pull outputs capable of ±7.8 mA drive at 5 V. Typical supply current is 100 nA, and input leakage is ±100 nA at 6 V. Propagation delay ranges from 8 ns to 52 ns depending on voltage.

Inverter Gates Feature Summary

• Schmitt-trigger inputs provide hysteresis for low power noise rejection and tolerance to slow or noisy signals
• Balanced CMOS push-pull outputs allow similar sourcing and sinking currents
• Wide operating voltage range supports diverse system power requirements

Inverter Gates Applications

• Combining power good signals
• Enabling digital signals
• Driving system controller reset pins

Inverter Gates Procurement Notes

Verify the specific ordering suffix 'PWR' corresponds to the TSSOP-14 package variant. Confirm RoHS compliance and lead finish details via the latest Package Option Addendum. Ensure design implementation accounts for absolute maximum ratings to prevent damage during manufacturing or operation.

Inverter Gates Selection Notes

Select this component when logic functions require immunity to signal noise or slow transition rates. The HCS series is suitable for applications needing wide voltage flexibility between 2 V and 6 V. Verify that output drive capabilities meet load requirements without exceeding thermal limits.

Inverter Gates Part Context

This device belongs to Texas Instruments' SN74HCS logic family, designed for high-speed CMOS operations with enhanced noise immunity. It serves as a direct functional replacement for standard HC logic where Schmitt-trigger behavior is required. The part is manufactured under production data standards ensuring consistent performance across batches.

Inverter Gates Replacement Considerations

SN74HCS21DR (SOIC-14 package)

Inverter Gates FAQ

How does the Schmitt-trigger architecture affect input handling?

It provides hysteresis that makes the device tolerant to slow or noisy input signals, eliminating the need for strict input transition rate requirements.

What is the recommended handling for unused inputs?

Unused inputs must be terminated to either VCC or ground to prevent undefined operational states caused by floating voltages.