74HC21 Datasheet – Dual 4-input AND Gate ( PDF )

Posted on October 16, 2021June 8, 2022 by pinout

Part Number: 74HC21

Function: Dual 4-input AND Gate

Package: DIP, SOP 14 Pin Type

Manufacturer: Philips Electronics ( https://www.nxp.com/ )

Pinouts:

74HC21 datasheet

Description

The 74HC21 is a high-speed Si-gate CMOS device and is pin compatible with low-power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The device provide the 4-input AND function.

Features

1. Output capability: standard

2. ICC category: SSI

PIN DESCRIPTION :

PIN NO. SYMBOL NAME AND FUNCTION

1, 9 1A, 2A data inputs
2, 10 1B, 2B data inputs
3, 11 n.c. not connected
4, 12 1C, 2C data inputs
5, 13 1D, 2D data inputs
6, 8 1Y, 2Y data outputs
7 GND ground (0 V)
14 VCC positive supply voltage

Other data sheets are available within the file:

74HC21D, 74HC21DB, 74HC21N, 74HC21NB

74HC21 Datasheet PDF Download

7408 Datasheet – Quad 2-Input AND Gates – DM7408

Posted on January 10, 2021November 9, 2022 by pinout

This post explains for the TTL IC.

Part Number: 7408, DM7408

Function : Quad 2-Input AND Gates

Package: DIP, SOP 14 Pin Type

Manufacturer: Fairchild

See the preview image and the 7408 Datasheet file for more information.

7408 Pinout

Description

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

Fuction Table ( Y= AB )

A B Y
L L L
L H L
H L L
H H H

Recommended Operating Conditions

1. VCC : Supply Voltage = 4.75 5 5.25 V
2. VIH : HIGH Level Input Voltage = 2 V
3. VIL : LOW Level Input Voltage = 0.8 V
4. IOH : HIGH Level Output Current = −0.8 mA
5. IOL : LOW Level Output Current = 16 mA
6. TA : Free Air Operating Temperature = 0 70 °C

Absolute Maximum Ratings