SN74LVC138A 3 线路至 8 线路解码器/多路解复用器
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
| SN74LVC138A | |
| Rating | Catalog |
| Technology Family | LVC |
SN74LVC138A 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)
SN74LVC138A 芯片订购指南
| 器件 | 状态 | 温度 | 价格 | 封装 | 引脚 | 封装数量 | 封装载体 | 丝印标记 |
| SN74LVC138AD | ACTIVE | -40 to 85 | 0.21 | 1ku | SOIC (D) | 16 | 40 | TUBE | |
| SN74LVC138ADE4 | ACTIVE | -40 to 85 | 0.21 | 1ku | SOIC (D) | 16 | 40 | TUBE | |
| SN74LVC138ADG4 | ACTIVE | -40 to 85 | 0.21 | 1ku | SOIC (D) | 16 | 40 | TUBE | |
| SN74LVC138ADR | ACTIVE | -40 to 85 | 0.17 | 1ku | SOIC (D) | 16 | 2500 | LARGE T&R | |
| SN74LVC138ADRE4 | ACTIVE | -40 to 85 | 0.17 | 1ku | SOIC (D) | 16 | 2500 | LARGE T&R | |
| SN74LVC138ADRG4 | ACTIVE | -40 to 85 | 0.17 | 1ku | SOIC (D) | 16 | 2500 | LARGE T&R | |
| SN74LVC138AN | ACTIVE | -40 to 85 | 0.18 | 1ku | PDIP (N) | 16 | 25 | TUBE | |
| SN74LVC138ANE4 | ACTIVE | -40 to 85 | 0.18 | 1ku | PDIP (N) | 16 | 25 | TUBE |
SN74LVC138A 质量与无铅数据
| 器件 | 环保计划* | 铅/焊球涂层 | MSL 等级/回流焊峰 | 环保信息与无铅 (Pb-free) | DPPM / MTBF / FIT 率 |
| SN74LVC138AD | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74LVC138AD | SN74LVC138AD |
| SN74LVC138ADE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74LVC138ADE4 | SN74LVC138ADE4 |
| SN74LVC138ADG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74LVC138ADG4 | SN74LVC138ADG4 |
| SN74LVC138ADR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74LVC138ADR | SN74LVC138ADR |
| SN74LVC138ADRE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74LVC138ADRE4 | SN74LVC138ADRE4 |
| SN74LVC138ADRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74LVC138ADRG4 | SN74LVC138ADRG4 |
| SN74LVC138AN | Pb-Free (RoHS) | CU NIPDAU | N/A for Pkg Type | SN74LVC138AN | SN74LVC138AN |
| SN74LVC138ANE4 | Pb-Free (RoHS) | CU NIPDAU | N/A for Pkg Type | SN74LVC138ANE4 | SN74LVC138ANE4 |
SN74LVC138A 应用技术支持与电子电路设计开发资源下载
- SN74LVC138A 数据资料 dataSheet 下载.PDF
- TI 德州仪器MSI 功能产品选型与价格 . xls
- Logic Guide 2009 (PDF 4263 KB)
- Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
- Understanding and Interpreting Standard-Logic Data Sheets (PDF 857 KB)
- TI IBIS File Creation, Validation, and Distribution Processes (PDF 380 KB)
- Implications of Slow or Floating CMOS Inputs (PDF 101 KB)
- CMOS Power Consumption and CPD Calculation (PDF 89 KB)
- Designing With Logic (PDF 186 KB)
- Live Insertion (PDF 150 KB)
- Input and Output Characteristics of Digital Integrated Circuits (PDF 1708 KB)
- Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc (PDF 43 KB)
- HiRel Unitrode Power Management Brochure (PDF 206 KB)
- LOGIC Pocket Data Book (PDF 6001 KB)
- HiRel Unitrode Power Management Brochure (PDF 206 KB)
- Logic Cross-Reference (PDF 2938 KB)
