7420 / 74LS20 : Dual 4-Input NAND Gate

7420 General Description:

This device contains two independent gates each of which performs the logic NAND function.

7420 Absolute Max Ratings:

Supply Voltage:  7V
Input Voltage:  7V
Operating Free Air Temperature Range: 0°C to +70°C
Storage Temperature Range:  -65°C to +150°C

7420 pin assignment:

7420 pin assignment

7420 truth table function:

7420 table fuction

Download 74LS20 Datasheet pdf.

SN74LS14 General Description :

Each circuit functions as an inverter, but because of the Schmitt action, it has different input threshold levels for positive-going (VT+) and negative-going (VT–) signals. These circuits are temperature compensated and can be triggered from the slowest of input ramps and still give clean, jitter-free output signals.

SN74LS14 feature:

• Operation From Very Slow Edges
• Improved Line-Receiving Characteristics
• High Noise Immunity

7414 pin assignment :

7414 pin assignment

7414 logic diagram :

7414 logic diagram

Download SN74LS14 Datasheet pdf.

7411 General Description

This device contains three independent gates each of which performs the logic AND function.

7411 Absolute Maximum Ratings:

• Supply Voltage:  7V
• Input Voltage:  7V
• Operating Free Air Temperature Range : 0 C to +70 C
• Storage Temperature Range:  -65 C to +150 C

Note: The “Absolute Maximum Ratings’‘ are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits.

7411 pinout / connection diagram :

7411 connection diagram

7411 Function Table / Truth Table :

7411 function table

Download DM74LS11 Datasheet PDF

7410 General Description

This device contains three independent gates each of which performs the logic NAND function.

7410 Absolute Maximum Ratings:

• Supply Voltage:  7V
• Input Voltage:  7V
• Operating Free Air Temperature Range :
  • DM54LS and 54LS: -55 C to +125 C
  • DM74LS: 0 C to +70 C
• Storage Temperature Range:  -65 C to +150 C

Note: The “Absolute Maximum Ratings’‘ are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits.

7410 pinout / connection diagram :

7410 connection diagram

7410 function table / truth table :

7410 function table

Download 74LS10 datasheet PDF

7408 General Description :
This device contains four independent gates each of which performs the logic AND function.

7408 Pin & Connection Diagram :

7408 pin & connection diagram

7408 Truth Table Function :

7408 truth table function

Download 74LS08 Datasheet PDF

7402 General Description :
This device contains four independent gates, each of which performs the logic NOR function.

74LS02 Features :

• Switching specifications at 50 pF
• Switching specifications guaranteed over full temperature and VCC range
• Advanced oxide-isolated, ion-implanted Schottky TTL process
• Functionally and pin for pin compatible with Schottky and low power Schottky TTL counterpart
• Improved AC performance over Schottky and low power Schottky counterparts

7402 Pin & Connection Diagram :

7402 pin & connection diagram

7402 Truth Table / Table Function :

74LS02 truth table function

Download 74ALS02 Datasheet PDF

Download 74HC02 Datasheet PDF

74HC00 – 74HCT00 General Description :

The 74HC00 – 74HCT00 TTL IC contains four independent gates each of which performs the logic NAND function. The 74HC00; 74HCT00 are high-speed Si-gate CMOS devices that comply with JEDEC standard no. 7A. They are pin compatible with Low-power Schottky TTL (LSTTL).

Input levels:

• For 74HC00: CMOS level
• For 74HCT00: TTL level

7400 pin assignment :

74HC00 - 74HCT00 pin assignment

7400 logic diagram :

74HC00 logic diagram

7400 Function table / truth table:

The devices perform the following Boolean function:

74HCT00 function table

Download 74HC00 – 74HCT00 Datasheet PDF

74LS00 General Description :

The 74LS00 TTL IC contains four independent gates each of which performs the logic NAND function. The LS means Low Power Schottky. The low power means the IC has a lower power consumption than the original TTL device but with a slower response. The Schottky is used to reduce the response time. Schottky metal-semiconductor junctions are featured in the 74S, 74LS and 74ALS series, where they are employed as clamps in parallel with the collector-base junctions of the bipolar junction transistor (BJT) to prevent their saturation, thereby greatly reducing their turn-off delays.

74LS00  Pin Assignment :

74LS00 pin assignment

7400 Logic Diagram

74LS00 logic diagram

7400 Function table / truth table:

The devices perform the following Boolean function:

74LS00 function table (truth table)

Download 74LS00 Datasheet PDF

The 74HC04 / 74HCT04 TTL IC contains six independent gates each of which performs the logic INVERT function (Hex Inverter). The HC means  High speed CMOS, similar performance to LS, 12nS, while the HCT means High speed, compatible logic levels to bipolar parts. Compare to its LS brother, 74LS04.

The 74HC/HCT04 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The 74HC/HCT04 provide six inverting buffers.

7404  Pin Assignment :

74HC04 pin assignment

7404 Logic Diagram :

74HC04 - 74HCT04 Logic Diagram

Download 74HC04 – 74HCT04 Datasheet PDF

The 74LS04 TTL IC contains six independent gates each of which performs the logic INVERT function. The LS means Low Power Schottky. The low power means the IC has a lower power consumption than the original TTL device but with a slower response. The Schottky is used to reduce the response time. Schottky metal-semiconductor junctions are featured in the 74S, 74LS and 74ALS series, where they are employed as clamps in parallel with the collector-base junctions of the bipolar junction transistor (BJT) to prevent their saturation, thereby greatly reducing their turn-off delays.

7404  Pin Assignment :

74LS04 pin assignment

7404 Hex Inverter Logic Diagram :

74LS04 logic diagram

Download 74ls04 datasheet pdf