SN74LS253是TI公司的一款解码器/编码器/多路复用器产品，SN74LS253是具有三态输出的双路 4 线路至 1 线路数据选择器/多路复用器，本页介绍了SN74LS253的产品说明、应用、特性等，并给出了与SN74LS253相关的TI元器件型号供参考。
SN74LS253 - 具有三态输出的双路 4 线路至 1 线路数据选择器/多路复用器 - 解码器/编码器/多路复用器 - 特殊逻辑 - TI公司（Texas Instruments，德州仪器）
Each of these Schottky-clamped data selectors/multiplexers contains inverters and drivers to supply fully complementary, on-chip, binary decoding data selection to the AND-OR gates. Separate output control inputs are provided for each of the two four-line sections.
The three-state outputs can interface with and drive data lines of bus-organized systems. With all but one of the common outputs disabled (at a high-impedance state) the low-impedance of the single enabled output will drive the bus line to a high or low logic level.
- Three-State Version of SN54/74LS153, SN54/74S153
- Schottky-Diode-Clamped Transistors
- Permits Multiplexing from N Lines to 1 Line
- Performs Parallel-to Serial Conversion
- Fully Compatible with Most TTL Circuits
- Low Power Dissipation
- 'LS253 … 35 mW Typical
- 'S253 … 225 mW Typical
