TI SN74LS193D

二进制计数器14.75 V ~ 5.25 V

Overview

These monolithic circuits are synchronous reversible (up/down) counters having a complexity of 55 equivalent gates. The '192 and 'LS192 circuits are BCD counters and the '193 and 'LS193 are 4-bit binary counters. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincidently with each other when so instructed by the steering logic. This mode of operation eliminates the output counting spikes which are normally associated with asynchronous (ripple-clock) counters.

These counters are designed to be cascaded without the need for external circuitry. Both borrow and carry outputs are available to cascade both the up- and down-counting functions. The borrow output produces a pulse equal in width to the count-down input when the counter underflows. Similarly, the carry output produces a pulse equal in width to the count-up input when an overflow condition exists. The counters can then be easily cascaded by feeding the borrow and carry outputs to the count-down and count-up inputs respectively of the succeeding counter.

Features

74LS Series
Embedded in the 16-SOIC (0.154, 3.90mm Width) package
4 bits per element
TCO UP AND TCO DOWN OUTPUTS; SEPARATE UP/DOWN CLOCK
Operating supply voltage of 5V
Frequency of 32MHz

Surface Mount Mounting Type

Applications

There are a lot of Texas Instruments
SN74LS193D Counters & Dividers applications.

• Digital multiplexing and demultiplexing
• Signal gating
• Frequency dividing circuits
• Time delay circuits
• 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