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SN74LS259 from TI,Texas Instruments

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SN74LS259

Manufacturer: TI

8-Bit Adder Latch

Partnumber Manufacturer Quantity Availability
SN74LS259 TI 55 In Stock

Description and Introduction

8-Bit Adder Latch The SN74LS259 is a 8-bit addressable latch manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Logic Family:** LS (Low-Power Schottky)  
- **Number of Bits:** 8  
- **Latch Type:** Addressable  
- **Supply Voltage (VCC):** 4.75V to 5.25V  
- **Operating Temperature Range:** 0°C to 70°C  
- **High-Level Output Current (IOH):** -0.4mA  
- **Low-Level Output Current (IOL):** 8mA  
- **Propagation Delay:** Typically 25ns  
- **Package Options:** DIP (Dual In-line Package), SOIC (Small Outline IC)  

### **Descriptions:**  
The SN74LS259 is an 8-bit addressable latch designed for memory and data storage applications. It allows individual bit addressing, enabling selective data writing to any of the 8 latches using a 3-bit address input.  

### **Features:**  
- **Individual Bit Addressing:** Select and write to any one of 8 latches using a 3-bit address.  
- **Common Clear Input:** Resets all latches to a low state.  
- **Parallel Outputs:** Provides direct access to all 8 latched outputs.  
- **Schottky Clamped:** Ensures fast switching and low power dissipation.  
- **TTL-Compatible Inputs:** Works with standard TTL logic levels.  

For detailed electrical characteristics and pin configurations, refer to the official TI datasheet.

Application Scenarios & Design Considerations

8-Bit Adder Latch

Alternative Part Number

  • CD74HCT259E --: Same 8-bit addressable latch function with pin-compatible DIP package; HCT family offers similar logic levels and is a direct functional replacement.
  • MC74HC259ADG --: 8-bit addressable latch in the same function class, pin-compatible, and widely available as a cross-manufacturer alternative to the LS259.
  • HEF40259BP --: 4000-series 8-bit addressable latch with equivalent latch/decoder function; usable as a functional substitute when timing and drive requirements are relaxed.
  • MC74HC259AN --: 8-bit addressable latch with identical function and pinout, HC family offers lower power consumption and is widely available.
  • 74HC259N --: Standard 8-bit addressable latch in HC logic, same function and pin configuration, suitable substitute when LS speed is not critical.

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