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SN74LS249N from TI,Texas Instruments

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SN74LS249N

Manufacturer: TI

BCD-TO-SEVEN-SEGMENT DECODERS/DRIVERS

Partnumber Manufacturer Quantity Availability
SN74LS249N TI 25 In Stock

Description and Introduction

BCD-TO-SEVEN-SEGMENT DECODERS/DRIVERS The SN74LS249N is a BCD-to-7-segment decoder/driver with open-collector outputs, manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Logic Family:** LS (Low-Power Schottky)  
- **Function:** BCD-to-7-segment decoder/driver  
- **Output Type:** Open-collector  
- **Number of Outputs:** 7 (for 7-segment display)  
- **Input Type:** BCD (Binary-Coded Decimal)  
- **Supply Voltage (VCC):** 4.75V to 5.25V  
- **Operating Temperature Range:** 0°C to 70°C  
- **Package Type:** PDIP (Plastic Dual In-Line Package)  
- **Pin Count:** 16  

### **Descriptions and Features:**  
- Converts 4-bit BCD input into 7-segment display outputs.  
- Open-collector outputs allow direct driving of common-anode LED displays.  
- Includes a lamp test input for testing all segments.  
- Features ripple-blanking input/output for display blanking control.  
- Designed for low-power consumption.  
- Compatible with TTL (Transistor-Transistor Logic) levels.  

This IC is commonly used in digital display applications such as counters, clocks, and instrumentation panels.

Partnumber Manufacturer Quantity Availability
SN74LS249N 1 In Stock

Description and Introduction

BCD-TO-SEVEN-SEGMENT DECODERS/DRIVERS The SN74LS249N is a BCD-to-7-segment decoder/driver with open-collector outputs, manufactured by Texas Instruments.  

### **Specifications:**  
- **Logic Family:** LS (Low-Power Schottky)  
- **Function:** BCD-to-7-Segment Decoder/Driver  
- **Output Type:** Open-Collector  
- **Supply Voltage (VCC):** 4.75V to 5.25V  
- **Operating Temperature Range:** 0°C to 70°C  
- **Package Type:** PDIP (Plastic Dual In-Line Package)  
- **Pin Count:** 16  
- **Current Rating (Output):** 24mA (sink)  
- **Propagation Delay:** Typically 30ns  

### **Descriptions:**  
The SN74LS249N converts a 4-bit Binary-Coded Decimal (BCD) input into a 7-segment display output. It is designed to drive common-anode LED or incandescent displays. The open-collector outputs allow for flexibility in interfacing with different display types.  

### **Features:**  
- **Lamp Test Input:** Allows all segments to be illuminated for testing.  
- **Ripple Blanking Input/Output:** Used for blanking leading/trailing zeros in multi-digit displays.  
- **Open-Collector Outputs:** Enable driving higher voltages than VCC.  
- **Low Power Consumption:** Typical power dissipation of 45mW.  
- **High Noise Immunity:** Schottky-clamped inputs for improved noise rejection.  

This information is based on the manufacturer's datasheet.

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