SN74HC20DRG4

Inverter Gates Overview

The SN74HC20DRG4 is a dual 4-input positive-NAND gate in the HC logic family, housed in a 14-pin SOIC package. 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 and balanced CMOS push-pull outputs capable of driving up to 10 LSTTL loads. Propagation delay ranges from 11 ns to 140 ns depending on voltage and temperature.

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 with low leakage current
• Supports fanout up to 10 LSTTL loads with significant power reduction compared to LSTTL

Inverter Gates Applications

• Alarm or tamper detect circuits
• S-R latch configurations
• General-purpose digital logic processing

Inverter Gates Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest Package Option Addendum to confirm production status and lead finish specifications. Ensure the component matches the required thermal resistance metrics for the SOIC (D) package variant. Confirm RoHS compliance and moisture sensitivity level ratings prior to integration into the assembly process.

Inverter Gates Selection Notes

Select this component when a dual 4-input NAND function is required within standard CMOS logic families. It is suitable for designs needing wide voltage operation between 2 V and 6 V. Consider the propagation delay characteristics relative to the system clock speed and ensure the output drive capability meets the load requirements without exceeding absolute maximum ratings.

Inverter Gates Part Context

This device belongs to the SNx4HC20 series of dual 4-input NAND gates manufactured by Texas Instruments. It is part of the broader HC logic family, designed to offer performance improvements over earlier TTL technologies while maintaining compatibility. The DRG4 designation indicates a tape-and-reel packaging format for surface-mount assembly.

Inverter Gates Replacement Considerations

SN74HC20DR

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 and excessive current consumption.

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. Larger loads may require a series resistor to limit output current.