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开关与多路复用器
数字多路信号分离器和解码器

SN74LV138AT

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3 线路到 8 线路解码器/多路解复用器

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数据表

SN74LV138AT

正在供货
数据表 立即订购

产品详情

Technology family LV-AT Number of channels 1 Operating temperature range (°C) -40 to 125 Rating Catalog Supply current (max) (µA) 20
Technology family LV-AT Number of channels 1 Operating temperature range (°C) -40 to 125 Rating Catalog Supply current (max) (µA) 20
SOIC (D) 16 59.4 mm² 9.9 x 6 SSOP (DB) 16 48.36 mm² 6.2 x 7.8 TSSOP (PW) 16 32 mm² 5 x 6.4 TVSOP (DGV) 16 23.04 mm² 3.6 x 6.4 VQFN (RGY) 16 14 mm² 4 x 3.5
  • Inputs Are TTL-Voltage Compatible
  • 4.5-V to 5.5-V VCC Operation
  • Max tpd of 7.6 ns at 5 V
  • Typical VOLP (Output Ground Bounce)<0.8 V at VCC = 5 V, TA = 25°C
  • Typical VOHV (Output VOH Undershoot)>>2.3 V at VCC = 5 V, TA = 25°C
  • Support Mixed-Mode Voltage Operation on All Ports
  • Ioff Supports Partial-Power Down Mode Operation
  • 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)
  • Inputs Are TTL-Voltage Compatible
  • 4.5-V to 5.5-V VCC Operation
  • Max tpd of 7.6 ns at 5 V
  • Typical VOLP (Output Ground Bounce)<0.8 V at VCC = 5 V, TA = 25°C
  • Typical VOHV (Output VOH Undershoot)>>2.3 V at VCC = 5 V, TA = 25°C
  • Support Mixed-Mode Voltage Operation on All Ports
  • Ioff Supports Partial-Power Down Mode Operation
  • 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)

The SN74LV138AT is a 3-line to 8-line decoder/demultiplexer, designed for high-performance memory-decoding or data-routing applications requiring very short propagation delay times. In high-performance memory systems, this decoder can be used to minimize the effects of system decoding. When employed with high-speed memories utilizing a fast enable circuit, the delay times of the decoder 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 decoder is negligible.

The conditions at the binary-select inputs (A, B, C) and the three enable inputs (G1, G2A, G2B) select one of eight output lines. The two active-low (G2A, G2B) and one active-high (G1) enable inputs 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.

This device is fully specified for partial-power-down application susing Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.

The SN74LV138AT is a 3-line to 8-line decoder/demultiplexer, designed for high-performance memory-decoding or data-routing applications requiring very short propagation delay times. In high-performance memory systems, this decoder can be used to minimize the effects of system decoding. When employed with high-speed memories utilizing a fast enable circuit, the delay times of the decoder 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 decoder is negligible.

The conditions at the binary-select inputs (A, B, C) and the three enable inputs (G1, G2A, G2B) select one of eight output lines. The two active-low (G2A, G2B) and one active-high (G1) enable inputs 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.

This device is fully specified for partial-power-down application susing Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.
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类型 标题 下载最新的英语版本 日期
* 数据表 SN74LV138AT 数据表 2005年 8月 24日

设计和开发

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评估板

14-24-LOGIC-EVM — 采用 14 引脚至 24 引脚 D、DB、DGV、DW、DYY、NS 和 PW 封装的逻辑产品通用评估模块

14-24-LOGIC-EVM 评估模块 (EVM) 旨在支持采用 14 引脚至 24 引脚 D、DW、DB、NS、PW、DYY 或 DGV 封装的任何逻辑器件。

用户指南: PDF | HTML
英语版 (Rev.B): PDF | HTML
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评估板

14-24-NL-LOGIC-EVM — 采用 14 引脚至 24 引脚无引线封装的逻辑产品通用评估模块

14-24-EVM 是一款灵活的评估模块 (EVM)，旨在支持具有 14 引脚至 24 引脚 BQA、BQB、RGY、RSV、RJW 或 RHL 封装的任何逻辑或转换器件。

用户指南: PDF | HTML
英语版 (Rev.A): PDF | HTML
TI.com 上无现货
封装 引脚 下载
SOIC (D) 16 查看选项
SSOP (DB) 16 查看选项
TSSOP (PW) 16 查看选项
TVSOP (DGV) 16 查看选项
VQFN (RGY) 16 查看选项
应遵守 TI 评估类商品的标准条款与条件。

订购和质量

包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点

支持和培训

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