9.2.1 Design Requirements

• All signals in the system operate at 5 V

• Avoid unstable state by not having LOW signals on both inputs

• Q output is HIGH when S is LOW

– Q output remains HIGH until R is LOW

9.2.1.1 Power Considerations

Ensure the desired supply voltage is within the range specified in the Recommended Operating Conditions. The

supply voltage sets the device's electrical characteristics as described in the Electrical Characteristics.

The positive voltage supply must be capable of sourcing current equal to the total current to be sourced by all

and any transient current required for switching. The logic device can only source as much current as is provided

Absolute Maximum Ratings.

The ground must be capable of sinking current equal to the total current to be sunk by all outputs of the

current required for switching. The logic device can only sink as much current as can be sunk into its ground

connection. Be sure not to exceed the maximum total current through GND listed in the Absolute Maximum

Ratings.

The SN74HCS595-Q1 can drive a load with a total capacitance less than or equal to 50 pF while still meeting

all of the data sheet specifications. Larger capacitive loads can be applied; however, it is not recommended to

exceed 50 pF.

the output voltage in the equation is defined as the difference between the measured output voltage and the

Total power consumption can be calculated using the information provided in CMOS Power Consumption and

Cpd Calculation.

Thermal increase can be calculated using the information provided in Thermal Characteristics of Standard Linear

and Logic (SLL) Packages and Devices.

CAUTION

limitation to prevent damage to the device. Do not violate any values listed in the Absolute Maximum

Ratings. These limits are provided to prevent damage to the device.

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SN74HCS595-Q1

SCLS785F – DECEMBER 2019 – REVISED DECEMBER 2021

Copyright © 2021 Texas Instruments Incorporated

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