3-Line To 8-Line Decoders/Demultiplexers The SN74HC138NSR is a 3-to-8 line decoder/demultiplexer manufactured by Texas Instruments (TI).
### **Specifications:**
- **Logic Type:** Decoder/Demultiplexer
- **Number of Input Lines:** 3 (A0, A1, A2)
- **Number of Output Lines:** 8 (Y0-Y7, active low)
- **Supply Voltage Range:** 2V to 6V
- **High-Level Input Voltage (Min):** 2V
- **Low-Level Input Voltage (Max):** 0.8V
- **Operating Temperature Range:** -40°C to 85°C
- **Package Type:** SOIC (16-pin)
- **Propagation Delay (Max):** 17 ns at 5V
- **Current Output (High/Low):** ±5.2 mA
- **Technology:** CMOS
### **Descriptions:**
The SN74HC138NSR decodes three binary address inputs (A0, A1, A2) into one of eight mutually exclusive outputs (Y0-Y7). It features three enable inputs (two active low, one active high) to simplify cascading and reduce the need for external gates.
### **Features:**
- **3-to-8 Line Decoding:** Converts 3-bit binary inputs to 8 active-low outputs.
- **Multiple Enable Inputs:** Two active-low (G1, G2A) and one active-high (G2B) for flexible control.
- **Low Power Consumption:** CMOS technology ensures minimal power dissipation.
- **Wide Operating Voltage:** Supports 2V to 6V supply range.
- **High Noise Immunity:** Typical of HC logic family.
- **Fast Switching Speed:** Propagation delay of 17 ns (max) at 5V.
- **Applications:** Memory address decoding, data routing, and logic function generation.
This information is sourced from TI's official documentation.
