SN54ALS138A
- Designed Specifically for High-Speed Memory Decoders and Data Transmission Systems
- Incorporate Three Enable Inputs to Simplify Cascading and/or Data Reception
- Package Options Include Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs
The ´ALS138A and ´AS138 are 3-line to 8-line decoders/demultiplexers designed for high-performance memory-decoding or data-routing applications requiring very short propagation delay times. In high-performance systems, these devices can be used to minimize the effects of system decoding. When employed with high-speed memories with a fast enable circuit, the delay times of the decoder and the enable time of the memory are usually less than the typical access time of the memory. The effective system delay introduced by the Schottky-clamped system decoder is negligible.
The conditions at the binary-select (A, B, and C) inputs and the
three enable (G1, 
, and 
) 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. 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.
The SN54ALS138A and SN54AS138 are characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ALS138A and SN74AS138 are characterized for operation from 0°C to 70°C.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | 3-Line To 8-Line Decoders/Demultiplexers datasheet (Rev. E) | 1996年 7月 1日 | |
| * | SMD | SN54ALS138A SMD 5962-86866 | 2016年 6月 21日 | |
| Selection guide | Logic Guide (Rev. AB) | 2017年 6月 12日 | ||
| Application note | Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) | 2015年 12月 2日 | ||
| User guide | LOGIC Pocket Data Book (Rev. B) | 2007年 1月 16日 | ||
| Application note | Semiconductor Packing Material Electrostatic Discharge (ESD) Protection | 2004年 7月 8日 | ||
| Application note | TI IBIS File Creation, Validation, and Distribution Processes | 2002年 8月 29日 | ||
| Application note | Bus-Interface Devices With Output-Damping Resistors Or Reduced-Drive Outputs (Rev. A) | 1997年 8月 1日 | ||
| Application note | Designing With Logic (Rev. C) | 1997年 6月 1日 | ||
| Application note | Input and Output Characteristics of Digital Integrated Circuits | 1996年 10月 1日 | ||
| Application note | Live Insertion | 1996年 10月 1日 | ||
| Application note | Advanced Schottky (ALS and AS) Logic Families | 1995年 8月 1日 |
設計與開發
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| CDIP (J) | 16 | Ultra Librarian |
| CFP (W) | 16 | Ultra Librarian |
| LCCC (FK) | 20 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點