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SN54S85J from TI,Texas Instruments

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SN54S85J

Manufacturer: TI

4-Bit Magnitude Comparators

Partnumber Manufacturer Quantity Availability
SN54S85J TI 80 In Stock

Description and Introduction

4-Bit Magnitude Comparators The SN54S85J is a 4-bit magnitude comparator manufactured by Texas Instruments (TI). Below are its specifications, descriptions, and features based on factual data:

### **Specifications:**  
- **Manufacturer:** Texas Instruments (TI)  
- **Series:** SN54S85  
- **Package:** Ceramic DIP (Dual In-line Package)  
- **Technology:** TTL (Transistor-Transistor Logic)  
- **Supply Voltage Range:** 4.5V to 5.5V  
- **Operating Temperature Range:** -55°C to +125°C (Military-grade)  
- **Logic Family:** 54 (Military/High-Reliability)  
- **Number of Pins:** 16  
- **Propagation Delay:** Typically 15ns (varies with conditions)  
- **Power Consumption:** Moderate (exact value depends on operating conditions)  

### **Descriptions:**  
- The SN54S85J is a 4-bit magnitude comparator designed for high-reliability applications.  
- It compares two 4-bit binary numbers (A and B) and provides outputs indicating whether A > B, A < B, or A = B.  
- It includes cascading inputs for expansion to larger word sizes.  
- The device is part of TI’s 54-series, which is qualified for military and aerospace applications.  

### **Features:**  
- **4-Bit Comparison:** Compares two 4-bit binary numbers.  
- **Three Outputs:** Provides A > B, A < B, and A = B outputs.  
- **Cascading Inputs:** Allows expansion to compare larger numbers (e.g., 8-bit, 16-bit).  
- **High-Speed Operation:** TTL-compatible with fast propagation delay.  
- **Wide Temperature Range:** Suitable for harsh environments (-55°C to +125°C).  
- **Military-Grade:** Meets MIL-STD-883 standards for reliability.  

This information is based on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

4-Bit Magnitude Comparators

Alternative Part Number

  • 5962-8680201EA --: Standard SMD 4-bit magnitude comparator in the same 54S logic family, qualified to MIL-PRF-38535 and directly form/fit/function compatible with SN54S85J.
  • MC10H166L --: ECL 5-bit magnitude comparator offering equivalent comparison function in a ceramic DIP package, suitable as a functional replacement where ECL logic levels are acceptable.
  • CD74HC85E --: High-speed CMOS 4-bit magnitude comparator with the same comparison function in a DIP package; a practical alternative when lower power and CMOS levels are acceptable.
  • MC10125L --: 4-bit magnitude comparator in DIP package with similar function and compatible logic levels, widely available as a direct functional substitute.
  • DM74S85N --: Pin-compatible 4-bit magnitude comparator from the 74S family, matching the original's speed and function in a DIP package.

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