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TC74HCT138AFN from TOS,TOSHIBA

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TC74HCT138AFN

Manufacturer: TOS, TOSHIBA

3-TO-8 LINE DECODER

Partnumber Manufacturer Quantity Availability
TC74HCT138AFN TOS, TOSHIBA 102500 In Stock

Description and Introduction

3-TO-8 LINE DECODER The TC74HCT138AFN is a high-speed CMOS logic decoder/demultiplexer manufactured by Toshiba.  

### **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 (VCC):** 4.5V to 5.5V  
- **High-Level Input Voltage (VIH):** 2.0V (min)  
- **Low-Level Input Voltage (VIL):** 0.8V (max)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package Type:** PDIP-16 (Plastic Dual In-Line Package)  
- **Propagation Delay (tpd):** 18 ns (max) at VCC = 4.5V, CL = 50pF  
- **Power Dissipation (PD):** 500 mW (max)  

### **Descriptions:**  
The TC74HCT138AFN is a 3-to-8 line decoder/demultiplexer that converts three binary inputs into eight mutually exclusive outputs (active-low). It features three enable inputs (two active-low and one active-high) for flexible control.  

### **Features:**  
- **High-Speed CMOS Technology:** Ensures low power consumption with high-speed operation.  
- **TTL-Compatible Inputs:** Works with TTL-level signals.  
- **Multiple Enable Inputs:** Allows for easy cascading and control.  
- **Wide Operating Voltage Range:** Supports standard 5V logic systems.  
- **Low Power Consumption:** Optimized for battery-operated and power-sensitive applications.  
- **Schmitt Trigger Inputs:** Improves noise immunity on control inputs.  

This device is commonly used in address decoding, memory selection, and data routing applications.

Application Scenarios & Design Considerations

3-TO-8 LINE DECODER

Alternative Part Number

  • SN74HCT138N --: Direct functional equivalent 3-to-8 line decoder/demultiplexer in HCT logic family with identical pinout and DIP-16 package.
  • CD74HCT138E --: Pin-compatible HCT 3-to-8 decoder with same logic function and DIP-16 package, widely available alternative.
  • MC74HCT138AN --: HCT-series 3-to-8 decoder in DIP-16 with matching pinout and electrical characteristics, suitable drop-in replacement.

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