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T74LS166 from ST,ST Microelectronics

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T74LS166

Manufacturer: ST

8-Bit SHIFT REGISTER DESCRIPTION

Partnumber Manufacturer Quantity Availability
T74LS166 ST 450 In Stock

Description and Introduction

8-Bit SHIFT REGISTER DESCRIPTION The T74LS166 is a parallel-in/serial-out shift register manufactured by STMicroelectronics (ST).  

### **Specifications:**  
- **Logic Family:** LS (Low-Power Schottky)  
- **Number of Bits:** 8-bit  
- **Input Type:** Parallel & Serial  
- **Output Type:** Serial  
- **Supply Voltage (VCC):** 4.75V to 5.25V  
- **Operating Temperature Range:** 0°C to +70°C  
- **Package Options:** DIP (Dual In-line Package), SO (Small Outline)  
- **Propagation Delay (Typical):** 20 ns  
- **Current Consumption (ICC):** 12 mA (max)  

### **Descriptions:**  
The T74LS166 is an 8-bit shift register with parallel and serial data inputs. It can load data in parallel or serially and shift it out serially. It features a clock input, a shift/load control input, and a serial data input.  

### **Features:**  
- **Parallel-to-Serial Conversion**  
- **Synchronous Parallel Loading**  
- **Asynchronous Master Reset**  
- **Schottky-clamped for High Performance**  
- **Wide Operating Voltage Range**  
- **Direct Interface with TTL, CMOS**  

For exact pin configurations and timing diagrams, refer to the official ST datasheet.

Application Scenarios & Design Considerations

8-Bit SHIFT REGISTER DESCRIPTION

Alternative Part Number

  • SN74LS166N --: Pin-compatible 8-bit parallel-load shift register in the same 74LS logic family, widely available and a direct functional drop-in replacement.
  • DM74LS166N --: Equivalent 74LS166 shift register from a different series prefix, same function and pinout, good second-source option.
  • CD74HC166E --: CMOS HC version of the 8-bit shift register with similar pinout and function; usable when slightly different speed and drive characteristics are acceptable.

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