SN74HC20DR

Inverter Gates Overview

The SN74HC20DR is a surface-mount integrated circuit containing two independent 4-input NAND gates. 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 inputs, balanced CMOS push-pull outputs, and standard high-impedance CMOS input structures. It provides significant power reduction compared to LSTTL logic ICs and supports fanout up to 10 LSTTL loads.

Inverter Gates Feature Summary

• Contains two independent 4-input NAND gates performing the Boolean function Y = A · B · C · D
• Features balanced CMOS push-pull outputs for similar sourcing and sinking current capabilities
• Includes buffered inputs with standard high-impedance CMOS characteristics

Inverter Gates Applications

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

Inverter Gates Procurement Notes

Verify the specific ordering suffix 'DR' corresponds to the SOIC (D) package variant. Confirm RoHS compliance status and lead finish details via the manufacturer's orderable addendum. Ensure the component meets the required thermal resistance specifications for the intended PCB layout and ambient operating conditions.

Inverter Gates Selection Notes

Select this component when a dual 4-input NAND gate solution is required in a surface-mount format. Consider the wide operating voltage range and low power consumption relative to LSTTL alternatives. Verify that the 14-pin SOIC package dimensions fit the available board space and that the thermal performance aligns with the system's heat dissipation requirements.

Inverter Gates Part Context

This part belongs to the Texas Instruments SNx4HC20 family of HCMOS logic devices. The 'SN74' prefix indicates commercial grade temperature ratings, while the 'HC' designation specifies High-speed CMOS technology. The 'DR' suffix identifies the specific tape-and-reel packaging configuration for the SOIC package type.

Inverter Gates Replacement Considerations

SN74HC20N

Inverter Gates FAQ

How should unused inputs be handled?

Unused inputs must not be left floating. They should be terminated to either VCC or ground using pull-up or pull-down resistors to prevent undefined operational states.

What is the recommended capacitive load limit?

To ensure optimal performance, the capacitive load at the output should be less than or equal to 70 pF.