SN74HC20D

Inverter Gates Overview

The SN74HC20D is a dual 4-input positive-NAND gate manufactured by Texas Instruments in the HC logic family. It operates within a supply voltage range of 2 V to 6 V and supports an operating temperature range from -40°C to +85°C. The device features buffered standard CMOS inputs and balanced push-pull outputs capable of driving up to 10 LSTTL loads. Propagation delay ranges from 11 ns at 6 V to 140 ns at 2 V, with a typical power dissipation capacitance of 25 pF per gate.

Inverter Gates Feature Summary

• Contains two independent 4-input NAND gates performing Boolean function Y = A · B · C · D
• Balanced CMOS push-pull outputs allow similar sourcing and sinking currents
• Standard CMOS inputs provide high impedance characteristics

Inverter Gates Applications

• Alarm or tamper detect circuits
• S-R latch configurations

Inverter Gates Procurement Notes

Verify the specific ordering suffix for package type and reel specifications. Confirm RoHS compliance status and lead finish details such as NIPDAU. Check current production status as some variants may be obsolete. Ensure thermal resistance values match the intended PCB layout requirements.

Inverter Gates Selection Notes

Select this component when requiring dual 4-input NAND functionality in a compact SOIC-14 package. Verify that input transition times meet recommended limits to prevent oscillations. Ensure output capacitive loads remain below 70 pF for optimal performance. Confirm supply voltage stability to maintain specified electrical characteristics.

Inverter Gates Part Context

This device belongs to the SNx4HC20 series of dual 4-input NAND gates. It is part of the broader 74HC logic family designed for low power consumption compared to LSTTL alternatives. The 'D' suffix specifically denotes the 14-pin Small Outline Integrated Circuit (SOIC) package variant.

Inverter Gates Replacement Considerations

SN74HC20DR: Active production version of the same SOIC package with tape-and-reel carrier.