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SN54LS279AJ from TI,Texas Instruments

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SN54LS279AJ

Manufacturer: TI, MOT

Quadruple /S-/R Latches

Partnumber Manufacturer Quantity Availability
SN54LS279AJ TI, MOT 2636 In Stock

Description and Introduction

Quadruple /S-/R Latches The SN54LS279AJ is a quad S-R latch manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Logic Type:** S-R Latch  
- **Number of Circuits:** 4  
- **Output Type:** Standard  
- **Supply Voltage (VCC):** 4.5V to 5.5V  
- **Operating Temperature Range:** -55°C to +125°C (Military Grade)  
- **Package / Case:** 16-CDIP (Ceramic DIP)  
- **Mounting Type:** Through Hole  
- **Propagation Delay Time:** Typically 15ns  
- **High-Level Output Current:** -0.4mA  
- **Low-Level Output Current:** 8mA  

### **Descriptions:**  
- The SN54LS279AJ is a quad set-reset (S-R) latch with active-low inputs.  
- Each latch has independent Set (S) and Reset (R) inputs.  
- Designed for high-speed logic applications.  
- Part of the SN54 series, which is the military-grade version with a wider temperature range.  

### **Features:**  
- **Quad S-R Latches:** Contains four independent latches in a single package.  
- **Active-Low Inputs:** Both Set (S) and Reset (R) inputs are active low.  
- **High-Speed Operation:** Low propagation delay for fast logic operations.  
- **Wide Operating Voltage:** Supports standard TTL logic levels.  
- **Military Temperature Range:** Suitable for harsh environments.  

This information is based on the manufacturer's datasheet and product specifications.

Application Scenarios & Design Considerations

Quadruple /S-/R Latches

Alternative Part Number

  • DM54LS279J --: Direct pin-compatible quad S-R latch in the same LS TTL family with identical function and DIP package.
  • MC54LS279AJ --: Equivalent 54LS series quad latch with matching logic function and military temperature range.
  • SN74LS279AN --: Same internal die and function in commercial temperature grade, suitable when military temperature range is not required.
  • M54LS279B1N --: Military-grade 54LS279 latch with equivalent logic function and DIP package, suitable drop-in substitute.
  • CD54LS279F3A --: Widely available 54LS279 quad latch in ceramic DIP, same function and pinout for replacement use.

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