SN54HC193 - 具有双时钟和清零功能的同步 4 位加/减二进制计数器

SN54HC193是TI德州仪器公司的一款计数器/算术/奇偶校验功能产品，SN54HC193是具有双时钟和清零功能的同步 4 位加/减二进制计数器，本站介绍了SN54HC193的封装应用图解、特点和优点、功能等，并给出了与SN54HC193相关的TI元器件型号供参考。

SN54HC193 - 具有双时钟和清零功能的同步 4 位加/减二进制计数器 - 计数器/算术/奇偶校验功能 - 特殊逻辑 - 德州仪器

产品描述

The ’HC193 devices are 4-bit synchronous, reversible, up/down binary counters. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincidentally 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.

The outputs of the four flip-flops are triggered on a low-to-high-level transition of either count (clock) input (UP or DOWN). The direction of counting is determined by which count input is pulsed while the other count input is high.

All four counters are fully programmable; that is, each output may be preset to either level by placing a low on the load (LOAD)\ input and entering the desired data at the data inputs. The output changes to agree with the data inputs independently of the count pulses. This feature allows the counters to be used as modulo-N dividers simply by modifying the count length with the preset inputs.

A clear (CLR) input has been provided that forces all outputs to the low level when a high level is applied. The clear function is independent of the count and LOAD\ inputs.

These counters were designed to be cascaded without the need for external circuitry. The borrow (BO)\ output produces a low-level pulse while the count is zero (all outputs low) and DOWN is low. Similarly, the carry (CO)\ output produces a low-level pulse while the count is maximum (9 or 15), and UP is low. The counters then can be cascaded easily by feeding BO\ and CO\ to DOWN and UP, respectively, of the succeeding counter.

产品特性

Wide Operating Voltage Range of 2 V to 6 V
Outputs Can Drive Up To 10 LSTTL Loads
Low Power Consumption, 80-µA Max ICC
Typical tpd = 20 ns
±4-mA Output Drive at 5 V
Low Input Current of 1 µA Max
Look-Ahead Circuitry Enhances Cascaded Counters
Fully Synchronous in Count Modes
Parallel Asynchronous Load for Modulo-N Count Lengths
Asynchronous Clear

下面可能是您感兴趣的TI德州仪器公司计数器/算术/奇偶校验功能元器件

TI公司产品现货专家，订购TI公司产品不限最低起订量，TI芯片大陆现货即时发货，香港库存3-5天发货，海外库存7-10天发货

寻找全球TI代理商现货货源 - TI公司（德州仪器）电子元件在线订购