74LS197-Preset Binary Counter


The 74LS series of integrated circuits (ICs) was one of the most popular logic families of transistor-transistor logic (TTL) logic chips. 74LS series is a bipolar, low-power Schottky IC.74LS197 contains divide-by-two and divide-by-eight sections which can be combined to form a modulo-16 binary counter. Low Power Schottky technology is used to achieve typical count rates of 70 MHz and power dissipation of only 80 mW

74LS00 Features

74LS00 Specifications

Supply Voltage4.75 – 5.25Vdc
Maximum Clock Frequency40Mhz
Power Dissipation2mW/gate @100kHz
Minimum Output Current8mA
Propagation Delay10nS
Fan Out (TTL Loads)20

74LS00 Pinout Diagram

74LS00 Pin Description

Pin NoPin NameDescription
1A1NAND Gate 1 Input 1
2B1 NAND Gate 1 Input 2
3C1 NAND Gate 1 Output
4A2 NAND Gate 2 Input 2
5B2 NAND Gate 2 Input 2
6C2 NAND Gate 2 Output
8C4 NAND Gate 4 Output 4
9A4 NAND Gate 4 Input 2
10B4 NAND Gate 4 Input 2
11C3 NAND Gate 3 Output
12A3 NAND Gate 3 Input 2
13B3 NAND Gate 3 Input 2
14VCCPositive Supply

74LS00 Circuit


74LS00 Alternative Equivalent

74LS03, 74LS10, 74LS20, 74LS30

Download the TITLE Datasheet from the link given below.