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SN74LS145DR from TI,Texas Instruments

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SN74LS145DR

Manufacturer: TI

BCD-To-Decimal Decoders/Drivers
Partnumber Manufacturer Quantity Availability
SN74LS145DR TI 50000 In Stock

Description and Introduction

BCD-To-Decimal Decoders/Drivers The SN74LS145DR is a BCD-to-decimal decoder/driver manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Logic Family:** LS (Low Power Schottky)  
- **Function:** BCD-to-Decimal Decoder/Driver  
- **Number of Input Lines:** 4 (BCD inputs: A, B, C, D)  
- **Number of Output Lines:** 10 (Decimal outputs: 0-9)  
- **Output Type:** Open-Collector  
- **Supply Voltage (VCC):** 4.75V to 5.25V  
- **Operating Temperature Range:** 0°C to 70°C  
- **Package Type:** SOIC-16  
- **Mounting Type:** Surface Mount  

### **Descriptions:**  
The SN74LS145DR is designed to convert a 4-bit Binary-Coded Decimal (BCD) input into one of ten mutually exclusive decimal outputs. It features open-collector outputs capable of sinking high currents, making it suitable for driving indicator lamps, relays, or other low-voltage devices.  

### **Features:**  
- **High Output Current:** Can sink up to 80mA per output.  
- **Low Power Consumption:** Typical power dissipation of 45mW.  
- **BCD Input Compatibility:** Accepts standard TTL logic levels.  
- **Open-Collector Outputs:** Allows for flexible interfacing with external loads.  
- **Wide Operating Voltage Range:** Supports standard 5V logic systems.  

This device is commonly used in display driving, industrial control systems, and instrumentation applications.

Application Scenarios & Design Considerations

BCD-To-Decimal Decoders/Drivers

Alternative Part Number

  • CD74HC145E --: Same BCD-to-decimal decoder function in the 74-series family, CMOS HC logic with comparable drive, different series prefix so it is easily distinguished from the LS source.
  • MC74HC145ADG --: Pin-compatible BCD-to-decimal decoder/driver from a different manufacturer and HC series, suitable drop-in replacement for most LS145 applications.
  • SN74HCT145N --: HCT logic version of the same decoder function with TTL-compatible inputs, offering similar speed and interface behavior while using a different logic family designation.
  • MC74LS145DR2G --: Direct functional equivalent BCD-to-decimal decoder/driver in the same LS logic family, widely available and pin-compatible.
  • SN7445N --: Classic BCD-to-decimal decoder/driver with similar function; requires verifying open-collector output ratings and package differences.

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