TI SN74LS191D

二进制计数器14.75 V ~ 5.25 V

Overview

The '190, 'LS190, '191, and 'LS191 are synchronous, reversible up/down counters having a complexity of 58 equivalent gates. The '191 and 'LS191 are 4-bit binary counters and the '190 and 'LS190 are BCD counters. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincident with each other when so instructed by the steering logic. This mode of operation eliminates the output counting spikes normally associated with asynchronous (ripple clock) counters.

Series 54' and 54LS' are characterized for operation over the full military temperature range of -55°C to 125°C; Series 74' and 74LS' are characterized for operation from 0°C to 70°C.

Features

74LS Series
Embedded in the 16-SOIC (0.154, 3.90mm Width) package
4 bits per element
TCO OUTPUT
Operating supply voltage of 5V
Frequency of 25MHz

Surface Mount Mounting Type

Applications

There are a lot of Texas Instruments
SN74LS191D Counters & Dividers applications.

• Communications Digital Frequency Synthesizers;
• VHF, UHF, FM, AM, etc.
• Fixed or Programmable Frequency Division
• Time Out Timer for Consumer-Application Industrial Controls
• Timing applications
• Clocks
• Up Counters
• Dual Up Counters
• MULTIPLICATION
• DIVISION