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SNJ54HC688J from TI,Texas Instruments

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SNJ54HC688J

Manufacturer: TI

8-Bit Identity Comparators

Partnumber Manufacturer Quantity Availability
SNJ54HC688J TI 24 In Stock

Description and Introduction

8-Bit Identity Comparators The SNJ54HC688J is a high-speed 8-bit magnitude comparator manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Logic Type:** Magnitude Comparator  
- **Number of Bits:** 8  
- **Output Type:** Active High  
- **Supply Voltage Range:** 2V to 6V  
- **Operating Temperature Range:** -55°C to +125°C  
- **Package Type:** CDIP (Ceramic Dual In-Line Package)  
- **Mounting Type:** Through Hole  
- **Propagation Delay:** 30ns (typical) at 5V  
- **Current - Output High, Low:** 5.2mA, 5.2mA  
- **Features:**  
  - High-speed operation  
  - Low power consumption  
  - TTL-compatible inputs  
  - Balanced propagation delays  

### **Description:**  
The SNJ54HC688J compares two 8-bit binary or BCD words and provides active-high outputs indicating whether the two words are equal (A = B). It is designed for high-speed digital systems and operates over a wide voltage range.  

### **Features:**  
- **High-Speed Performance:** Suitable for fast digital logic applications.  
- **Wide Operating Voltage:** Works with supply voltages from 2V to 6V.  
- **Low Power Consumption:** Optimized for power efficiency.  
- **Military Temperature Range:** Designed for harsh environments (-55°C to +125°C).  
- **TTL Compatibility:** Can interface with TTL logic levels.  

This device is commonly used in arithmetic processing, control systems, and digital signal processing applications.

Application Scenarios & Design Considerations

8-Bit Identity Comparators

Alternative Part Number

  • CD74HC688E --: Same 8-bit magnitude comparator function in a PDIP-20 package, direct functional equivalent from the same vendor.
  • 74HC688N --: Standard 74HC688 8-bit comparator in DIP-20, pin-compatible with the original military-grade part.
  • MC74HC688N --: 8-bit identity comparator in PDIP-20 with equivalent HC logic characteristics, suitable drop-in replacement.

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