SN74LV393A - 双路 4 位二进制计数器

SN74LV393A是TI德州仪器公司的一款计数器/算术/奇偶校验功能产品，SN74LV393A是双路 4 位二进制计数器，本站介绍了SN74LV393A的封装应用图解、特点和优点、功能等，并给出了与SN74LV393A相关的TI元器件型号供参考。

SN74LV393A - 双路 4 位二进制计数器 - 计数器/算术/奇偶校验功能 - 特殊逻辑 - 德州仪器

产品描述

The ’LV393A devices contain eight flip-flops and additional gating to implement two individual 4-bit counters in a single package. These devices are designed for 2-V to 5.5-V VCC operation.

These devices comprise two independent 4-bit binary counters, each having a clear (CLR) and a clock (CLK)\ input. These devices change state on the negative-going transition of the CLK\ pulse. N-bit binary counters can be implemented with each package, providing the capability of divide by 256. The ’LV393A devices have parallel outputs from each counter stage so that any submultiple of the input count frequency is available for system timing signals.

These devices are fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the devices when they are powered down.

产品特性

2-V to 5.5-V VCC Operation
Max tpd of 10 ns at 5 V
Typical VOLP (Output Ground Bounce) <0.8 V at VCC = 3.3 V, TA = 25°C
Typical VOHV (Output VOH Undershoot) >2.3 V at VCC = 3.3 V, TA = 25°C
Ioff Supports Partial-Power-Down-Mode Operation
Dual 4-Bit Binary Counters With Individual Clocks
Direct Clear for Each 4-Bit Counter
Can Significantly Improve System Densities by Reducing Counter Package Count by 50 Percent
Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model (A114-A)
- 200-V Machine Model (A115-A)
- 1000-V Charged-Device Model (C101)

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