SN54LVC138A - 3 线至 8 线解码器/多路解复用器

SN54LVC138A是TI德州仪器公司的一款解码器/编码器/多路复用器产品，SN54LVC138A是3 线至 8 线解码器/多路解复用器，本站介绍了SN54LVC138A的封装应用图解、特点和优点、功能等，并给出了与SN54LVC138A相关的TI元器件型号供参考。

SN54LVC138A - 3 线至 8 线解码器/多路解复用器 - 解码器/编码器/多路复用器 - 特殊逻辑 - 德州仪器

产品描述

The SN54LVC138A 3-line to 8-line decoder/demultiplexer is designed for 2.7-V to 3.6-V VCC operation, and the SN74LVC138A 3-line to 8-line decoder/demultiplexer is designed for 1.65-V to 3.6-V VCC operation.

The ’LVC138A devices are designed for high-performance memory-decoding or data-routing applications requiring very short propagation delay times. In high-performance memory systems, these decoders minimize the effects of system decoding. When employed with high-speed memories utilizing a fast enable circuit, delay times of these decoders and the enable time of the memory usually are less than the typical access time of the memory. This means that the effective system delay introduced by the decoders is negligible.

The conditions at the binary-select inputs and the three enable inputs select one of eight output lines. Two active-low enable inputs and one active-high enable input reduce the need for external gates or inverters when expanding. A 24-line decoder can be implemented without external inverters, and a 32-line decoder requires only one inverter. An enable input can be used as a data input for demultiplexing applications.

Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators in a mixed 3.3-V/5-V system environment.

产品特性

Operate From 1.65 V to 3.6 V
Inputs Accept Voltages to 5.5 V
Max tpd of 5.8 ns at 3.3 V
Typical VOLP (Output Ground Bounce) < 0.8 V at VCC = 3.3 V, TA = 25°C
Typical VOHV (Output VOH Undershoot) > 2 V at VCC = 3.3 V, TA = 25°C
Latch-Up Performance Exceeds 250 mA Per JESD 17
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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