74HCT20 NAND Gate：Datasheet, Pinout and Application

74HCT20 Pinout

74HCT20 Symbol

74HCT20 Footprint

The 74HCT20 is a twin 4-input CMOS Logic NAND Gate with fast speed. The logic gates use silicon gate CMOS technology to reach operating speeds comparable to LSTTL gates while consuming the same amount of power as normal CMOS integrated circuits. It's typically found in buffer circuits, logic inverter circuits, and other electronic circuits.

NXP USA Inc. 74HCT20N,652 technical specifications, attributes, parameters and parts with similar specifications to NXP USA Inc. 74HCT20N,652.

• Complies with JEDEC standard JESD7A

• Low-power dissipation

• Input levels:

• For 74HCT20: TTL level

• ESD protection:

• HBM JESD22-A114F exceeds 2 000 V

• MM JESD22-A115-A exceeds 200 V

• Multiple package options

• Specified from -40 °C to +80 °C and from -40 °C to +125 °C

• Logic Buffer circuit

• Basic Logic Circuits

• Encoders and Decoders

• Multiplexers and De-multiplexers

• Oscillator circuits

• Networking and Digital Systems

Equivalent for 74HCT20:  CD4012, 74S140, 74HC20

The 74HCT20 is a Logic Gate family IC with dual 4-input NAND gates. It can accept four logic inputs and output a NAND Gate truth table-based output. Clamp diodes are used as inputs. This allows current limiting resistors 

to be used to interface inputs to voltages greater than VCC. In digital communication, the NAND gate is extensively employed in buffer circuits and logic inverter circuits. The pinout and features of the 74HCT20 and 74HC20 are extremely similar.

Input NAND Gate Truth Table

Simply connect the Vcc and ground connections to power the 74HCT20 IC. The IC's typical working voltage is +5V. The IC's output voltage on pin Y will be the same as the IC's operational voltage. When one or both of the Gate's inputs are high, the output will be high, according to the NAND Gate 4 input truth table shown above. The following is a diagram of the 74HCT20's internal circuit:

74HCT20 Internal Circuit

74HCT20 Package

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Download datasheets and manufacturer documentation for NXP USA Inc. 74HCT20N,652.