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IDT74FCT138CTSO from IDT

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IDT74FCT138CTSO

Manufacturer: IDT, FAI

FAST CMOS 1-OF-8 DECODER WITH ENABLE

Partnumber Manufacturer Quantity Availability
IDT74FCT138CTSO IDT, FAI 895 In Stock

Description and Introduction

FAST CMOS 1-OF-8 DECODER WITH ENABLE The IDT74FCT138CTSO is a 3-to-8 line decoder/demultiplexer manufactured by Integrated Device Technology (IDT). Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Technology:** Fast CMOS (FCT)  
- **Supply Voltage (VCC):** 4.5V to 5.5V  
- **Operating Temperature Range:** -40°C to +85°C  
- **Input/Output Compatibility:** TTL levels  
- **Propagation Delay:** Typically 5.5 ns  
- **Input Current (Max):** ±1 µA  
- **Output Drive Capability:** 24 mA (sink/source)  
- **Package Type:** SOIC (Small Outline Integrated Circuit)  

### **Descriptions:**
- The IDT74FCT138CTSO is a high-speed, low-power decoder/demultiplexer designed for digital logic applications.  
- It accepts a 3-bit binary input and decodes it into one of eight mutually exclusive outputs (active-low).  
- Features three enable inputs (two active-low and one active-high) for cascading and control flexibility.  

### **Features:**
- **High-Speed Operation:** Optimized for fast signal propagation.  
- **Low Power Consumption:** CMOS technology ensures minimal power dissipation.  
- **TTL-Compatible Inputs/Outputs:** Ensures seamless integration with TTL logic families.  
- **Three Enable Inputs:** Allows easy expansion and control (G1, /G2A, /G2B).  
- **ESD Protection:** Provides robustness against electrostatic discharge.  
- **Wide Operating Voltage Range:** Supports 4.5V to 5.5V operation.  

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

Application Scenarios & Design Considerations

FAST CMOS 1-OF-8 DECODER WITH ENABLE

Alternative Part Number

  • SN74F138D --: Same 3-to-8 line decoder/demultiplexer function in FCT/F logic family, SOIC package, widely available and pin-compatible.
  • MC74F138DR2 --: Equivalent 3-to-8 decoder in F logic with similar speed and SOIC-16 package, good second-source option.
  • 74FCT138ATSO --: FCT-series 3-to-8 decoder with comparable propagation delay and SOIC package, suitable functional replacement.
  • 74F138SC --: Same manufacturer's F-series 3-to-8 decoder in SOIC, direct functional replacement with matching pinout.

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