74LS190 Up/Down Decade 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. The 74LS190 is a synchronous UP/DOWN BCD Decade (8421) Counter and State changes of the counters are synchronous with the A LOW-to-HIGH transition of the Clock Pulse input.

74LS190 Features

• Synchronous Up/Down BCD Decade Counter, Count is Updated with Low-to-High Clock Transition
• Synchronous Counting
• High Speed up to 25MHz
• Individual Preset Inputs
• Standard TTL Switching Voltages

74LS190 Specifications

Supply Voltage	4.75 – 5.25Vdc
Maximum Clock Frequency	40Mhz
Power Dissipation	2mW/gate @100kHz
Minimum Output Current	8mA
Propagation Delay	10nS
Fan Out (TTL Loads)	20

74LS190 Pinout Diagram

74LS190 Pin Description

Pin No	Pin Name	Description
1	P1	Parallel Data Input
2	Q1	Flip-Flop Output
3	Q0	Flip-Flop Output
4	CE’	Count Enable (Active LOW) Input
5	U/D	Up/Down Count Control Input
6	Q2	Flip-Flop Output
7	Q3	Flip-Flop Output
8	GND	Ground
9	P3	Parallel Data Input
10	P2	Parallel Data Input
11	PL’	Parallel Load Control (Active LOW) Input
12	TC	Terminal Count Output
13	RC’	Ripple Clock Output
14	CP	Clock Pulse (Active HIGH going edge) Input
15	P0	Parallel Data Input
16	VCC	Positive Supply

Applications

• Clock generation
• Clock division
• Integrated oscillator
• Low power CMOS
• TTL compatible inputs
• In frequency counting circuits

74LS190 Alternative Equivalent

74LS162

Download 74LS190 Up/Down Decade Counter Datasheet from the link given below.