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SN74LS197 from TI,Texas Instruments

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15.625ms

SN74LS197

Manufacturer: TI

50/30/100-MHz [RESETTABLE DECADE OR BINARY COUNTERS/LATCHES

Partnumber Manufacturer Quantity Availability
SN74LS197 TI 25 In Stock

Description and Introduction

50/30/100-MHz [RESETTABLE DECADE OR BINARY COUNTERS/LATCHES The SN74LS197 is a 4-bit binary counter manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Logic Family:** LS (Low-Power Schottky)  
- **Number of Bits:** 4-bit  
- **Counting Sequence:** Binary (0000 to 1111)  
- **Supply Voltage (Vcc):** 4.75V to 5.25V (Nominal 5V)  
- **Operating Temperature Range:** 0°C to 70°C  
- **Maximum Clock Frequency:** ~30 MHz (typical)  
- **Power Dissipation:** ~100 mW (typical)  
- **Input/Output Compatibility:** TTL-compatible  

### **Descriptions:**  
- The SN74LS197 is an asynchronous presettable binary counter with a direct clear input.  
- It can be used in frequency division, counting, and timing applications.  
- The counter can be preset to any value using parallel load inputs.  

### **Features:**  
- **Asynchronous Clear:** Resets the counter to 0000 on a low-level input.  
- **Parallel Load Capability:** Allows preset loading via data inputs (A, B, C, D).  
- **Two Counting Modes:**  
  - **Binary Up-Count (0000 to 1111)**  
  - **Divide-by-N (programmable via preset inputs)**  
- **Schottky-Clamped Inputs:** Improves noise immunity.  
- **Standard TTL Outputs:** Compatible with other TTL logic families.  

For exact timing and electrical characteristics, refer to the official TI datasheet.

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