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SN74LS161AN from MOTOROLA

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SN74LS161AN

Manufacturer: MOTOROLA

BCD decade counter/4-bit binary counter

Partnumber Manufacturer Quantity Availability
SN74LS161AN MOTOROLA 358 In Stock

Description and Introduction

BCD decade counter/4-bit binary counter The SN74LS161AN is a 4-bit synchronous binary counter manufactured by **MOTOROLA**.  

### **Specifications:**  
- **Type:** Synchronous 4-bit binary counter  
- **Counting Mode:** Synchronous (parallel load capability)  
- **Operating Voltage:** 5V (TTL-compatible)  
- **Maximum Clock Frequency:** 25 MHz (typical)  
- **Propagation Delay:** 20 ns (typical)  
- **Power Dissipation:** 93 mW (typical)  
- **Operating Temperature Range:** 0°C to +70°C  
- **Package:** 16-pin DIP (Dual In-line Package)  

### **Descriptions:**  
- The SN74LS161AN is a synchronous presettable counter with internal carry look-ahead for high-speed counting.  
- It features a parallel load input for presetting the counter to any desired value.  
- The clear input resets the counter to zero asynchronously.  
- It operates synchronously with the clock signal, ensuring precise timing.  

### **Features:**  
- **Synchronous Counting:** All flip-flops are clocked simultaneously.  
- **Parallel Load Capability:** Allows loading of any 4-bit binary number.  
- **Asynchronous Clear:** Resets the counter to zero independently of the clock.  
- **Carry Look-Ahead:** Enables high-speed cascading of multiple counters.  
- **TTL-Compatible Inputs/Outputs:** Ensures compatibility with standard TTL logic levels.  

This information is based strictly on the manufacturer's datasheet for the **SN74LS161AN** by **MOTOROLA**.

Application Scenarios & Design Considerations

BCD decade counter/4-bit binary counter

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