Description: This package contains four independent NAND Fi/S latches With tri-state outputs. The third state is controlled by a common EN pin.

Functional Diagram and/or Package:

 


 

 

 

Pin Names:

Vdd - Positive Supply Voltage [BV to 15V]

Vss - Ground

EN - Enable

S1, S2, S3, 54 - Set

RST1, RST2, RST3, RST4 - Reset

Q1, Q2, Q3, Q4 - Outputs

NC - Not Connected

 

Truth Table:

 


 

 

 

Operation Mode:

S and RST are normally “1’1

When S goes to “0” Q passes to “1” and maintains the logic level.

When RST goes to “0, Q passes to “0” and stays in this state.

S and RST can't be “0” at the same time because both outputs pass to “0. This is a disallowed state.

EN controls the tri-state function. The outputs go to the third state When EN=D.

Electrical Characteristics:

 


 

 

 

Other Devices:

The 4043 is similar, but it has NOR inputs.

 

Applications:

Holding Registers [for Multiregister Systems]

Strobed Registers

Four Bits of Independent Storage

Digital Logic

 

Observations:

Do not cascade this device or use as shift register.

 

 

Datasheets


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