CD74AC238 3 线至 8 线同向解码器/多路解复用器
The CD74AC238 decoder/demultiplexer is designed for high-performance memory-decoding and data-routing applications that require 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 this 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 and the three enable inputs select one of eight output lines. Two active-low and one active-high enable inputs reduce the need for external gates or inverters when expanding
| CD74AC238 | |
| Rating | Catalog |
| Technology Family | AC |
CD74AC238 特性
- AC Types Feature 1.5-V to 5.5-V Operation and Balanced Noise Immunity at 30% of the Supply Voltage
- Speed of Bipolar F, AS, and S, With Significantly Reduced Power Consumption
- Designed Specifically for High-Speed Memory Decoders and Data-Transmission Systems
- Incorporates Three Enable Inputs to Simplify Cascading and/or Data Reception
- Balanced Propagation Delays
- ±24-mA Output Drive Current
- Fanout to 15 F Devices
- SCR-Latchup-Resistant CMOS Process and Circuit Design
- Exceeds 2-kV ESD Protection Per MIL-STD-883, Method 3015
CD74AC238 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 |
| CD74AC238E | ACTIVE | -55 to 125 | 0.34 | 1ku | PDIP (N) | 16 | 25 | TUBE | |
| CD74AC238EE4 | ACTIVE | -55 to 125 | 0.34 | 1ku | PDIP (N) | 16 | 25 | TUBE | |
| CD74AC238M | ACTIVE | -55 to 125 | 0.37 | 1ku | SOIC (D) | 16 | 40 | TUBE | |
| CD74AC238M96 | ACTIVE | -55 to 125 | 0.31 | 1ku | SOIC (D) | 16 | 2500 | LARGE T&R | |
| CD74AC238M96E4 | ACTIVE | -55 to 125 | 0.31 | 1ku | SOIC (D) | 16 | 2500 | LARGE T&R | |
| CD74AC238M96G4 | ACTIVE | -55 to 125 | 0.31 | 1ku | SOIC (D) | 16 | 2500 | LARGE T&R | |
| CD74AC238ME4 | ACTIVE | -55 to 125 | 0.37 | 1ku | SOIC (D) | 16 | 40 | TUBE | |
| CD74AC238MG4 | ACTIVE | -55 to 125 | 0.37 | 1ku | SOIC (D) | 16 | 40 | TUBE |
CD74AC238 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 |
| CD74AC238E | Pb-Free (RoHS) | CU NIPDAU | N/A for Pkg Type | CD74AC238E | CD74AC238E |
| CD74AC238EE4 | Pb-Free (RoHS) | CU NIPDAU | N/A for Pkg Type | CD74AC238EE4 | CD74AC238EE4 |
| CD74AC238M | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | CD74AC238M | CD74AC238M |
| CD74AC238M96 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | CD74AC238M96 | CD74AC238M96 |
| CD74AC238M96E4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | CD74AC238M96E4 | CD74AC238M96E4 |
| CD74AC238M96G4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | CD74AC238M96G4 | CD74AC238M96G4 |
| CD74AC238ME4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | CD74AC238ME4 | CD74AC238ME4 |
| CD74AC238MG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | CD74AC238MG4 | CD74AC238MG4 |
CD74AC238 应用技术支持与电子电路设计开发资源下载
- CD74AC238 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)