3-Line To 8-Line Decoders/Demultiplexers The SN74HCT138PWR is a 3-line 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)
- **Supply Voltage Range (VCC):** 4.5V to 5.5V
- **High-Level Input Voltage (VIH):** 2V (min)
- **Low-Level Input Voltage (VIL):** 0.8V (max)
- **Operating Temperature Range:** -40°C to +85°C
- **Package Type:** TSSOP-16
- **Propagation Delay (tpd):** 22 ns (typical at 5V)
- **Current - Output High, Low:** 4mA, 4mA
- **Mounting Type:** Surface Mount
### **Descriptions:**
The SN74HCT138PWR is designed to decode three binary address inputs (A0, A1, A2) into one of eight mutually exclusive outputs (Y0-Y7). It features three enable inputs (two active LOW and one active HIGH) to simplify cascading and system control.
### **Features:**
- **3-to-8 Line Decoding:** Converts 3 binary inputs to 8 active-low outputs.
- **Demultiplexing Capability:** Can function as a 1-of-8 demultiplexer.
- **Multiple Enable Inputs:** Includes G1 (active HIGH), G2A, and G2B (active LOW) for easy expansion.
- **Low Power Consumption:** CMOS technology ensures low power dissipation.
- **Wide Operating Voltage:** Supports 4.5V to 5.5V operation.
- **High Noise Immunity:** HCT technology provides improved noise margins.
- **Schmitt-Trigger Inputs:** Ensures clean switching even with slow input transitions.
This device is commonly used in memory addressing, data routing, and logic function generation.
