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SN74LS393 from TI,Texas Instruments

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SN74LS393

Manufacturer: TI

Dual 4-Bit Binary Counters

Partnumber Manufacturer Quantity Availability
SN74LS393 TI 712 In Stock

Description and Introduction

Dual 4-Bit Binary Counters The SN74LS393 is a dual 4-bit binary ripple counter manufactured by Texas Instruments.  

### **Specifications:**  
- **Logic Family:** LS (Low-Power Schottky)  
- **Number of Counters:** Dual (two independent 4-bit counters)  
- **Counting Mode:** Binary (0-15 per counter)  
- **Clock Input:** Negative-edge triggered  
- **Reset Function:** Asynchronous master reset (active HIGH)  
- **Supply Voltage (Vcc):** 4.75V to 5.25V (nominal 5V)  
- **Power Consumption:** Low power dissipation (typical 30mW per counter)  
- **Operating Temperature Range:** 0°C to 70°C (commercial grade)  
- **Package Options:** DIP (Dual In-line Package), SOIC (Small Outline IC)  

### **Descriptions:**  
- Each counter has a separate clock (CP) and clear (MR) input.  
- The outputs (Q0-Q3) represent the binary count.  
- Cascadable for higher bit counts (e.g., 8-bit, 12-bit, etc.).  

### **Features:**  
- **High-Speed Operation:** Typical propagation delay of 15ns.  
- **Asynchronous Clear:** Allows immediate reset of the count.  
- **Wide Operating Voltage:** Compatible with standard TTL logic levels.  
- **Buffered Outputs:** Improved noise immunity.  
- **Common Applications:** Frequency division, event counting, timing circuits.  

Would you like additional details on pin configuration or timing diagrams?

Application Scenarios & Design Considerations

Dual 4-Bit Binary Counters

Alternative Part Number

  • CD74HC393E --: Dual 4-bit binary ripple counter in the 74HC family, functionally equivalent to the SN74LS393 with CMOS lower power consumption and direct pin compatibility.
  • MC74HC393ADG --: Dual 4-bit binary counter from the 74HC series, same function and pinout as the SN74LS393, suitable drop-in replacement with reduced power draw.
  • SN74HC393N --: Same dual 4-bit counter function from TI's 74HC family, pin-compatible with the LS version and offers lower power consumption and higher speed.
  • 74HC393D --: Dual 4-bit binary ripple counter with the same logic function, HC family provides lower power and is a common drop-in replacement for LS-type counters.

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