SN74HC20PWR

Inverter Gates Overview

The SN74HC20PWR 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 'PWR' corresponds to the TSSOP-14 package variant. Confirm RoHS compliance status and lead finish specifications against the latest manufacturer orderable addendum. Ensure the component status is active production rather than obsolete before finalizing procurement plans.

Inverter Gates Selection Notes

Select this component for designs requiring dual 4-input NAND functionality within the HC logic family. Verify that the required propagation delay meets system timing constraints across the full 2 V to 6 V supply range. Ensure input signal edge rates comply with recommended transition times to prevent excessive current consumption.

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 equivalents. The PW suffix indicates the TSSOP surface-mount package option available for this logic function.

Inverter Gates Replacement Considerations

SN74HC20DR (SOIC package)

Inverter Gates FAQ

How should unused inputs be handled?

Unused inputs must be terminated to either VCC or ground. They can be directly terminated if completely unused or connected via pull-up/pull-down resistors if conditionally used.

What is the maximum capacitive load recommendation?

The capacitive load at the output should be less than or equal to 70 pF to ensure optimal performance and meet datasheet specifications.