Overview
The SN74LS145DR is a BCD-to-decimal decoder/driver integrated circuit produced by Texas Instruments. This monolithic device consists of eight inverters and ten four-input NAND gates, designed to provide full decoding of valid BCD input logic. It features high-performance, n-p-n output transistors suitable for use as indicator/relay drivers or as open-collector logic-circuit drivers. The SN74LS145DR is part of the 74LS series, known for its low power dissipation and compatibility with TTL and DTL logic circuits, as well as most MOS integrated circuits.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOIC (D) - 16 pins |
| Operating Temperature Range (°C) | 0 to 70 |
| Supply Voltage | 4.75V to 5.25V |
| Low Level Output Current | 80 mA |
| Maximum Clock Frequency | 35 MHz |
| Number of Inputs | 4 |
| Number of Outputs | 10 |
| Output Characteristics | Open-Collector |
| Moisture Sensitivity Level (MSL) | Level-1-260C-UNLIM |
| Peak Reflow Temperature (°C) | 260 |
Key Features
- Full decoding of valid BCD input logic, ensuring all outputs remain off for invalid binary input conditions.
- High-performance, n-p-n output transistors capable of sinking up to 80 milliamperes of current.
- Low power dissipation, typically 35 milliwatts for the 'LS145 series.
- Compatibility with TTL and DTL logic circuits, as well as most MOS integrated circuits.
- Open-collector output characteristics suitable for use as indicator/relay drivers or logic-circuit drivers.
Applications
The SN74LS145DR is versatile and can be used in various applications, including:
- Indicator and relay driving circuits.
- Open-collector logic circuits.
- BCD-to-decimal conversion in digital systems.
- Interface with TTL, DTL, and MOS integrated circuits.
- General-purpose decoding and demultiplexing tasks.
Q & A
- What is the primary function of the SN74LS145DR?
The primary function of the SN74LS145DR is to act as a BCD-to-decimal decoder/driver.
- What is the operating temperature range of the SN74LS145DR?
The operating temperature range is from 0°C to 70°C.
- What is the supply voltage range for the SN74LS145DR?
The supply voltage range is from 4.75V to 5.25V.
- How many inputs and outputs does the SN74LS145DR have?
The device has 4 inputs and 10 outputs.
- What is the maximum clock frequency of the SN74LS145DR?
The maximum clock frequency is 35 MHz.
- What type of output characteristics does the SN74LS145DR have?
The device has open-collector output characteristics.
- Is the SN74LS145DR compatible with TTL and MOS integrated circuits?
Yes, it is compatible with TTL, DTL, and most MOS integrated circuits.
- What is the typical power dissipation of the SN74LS145DR?
The typical power dissipation is 35 milliwatts.
- What is the peak reflow temperature for the SN74LS145DR during soldering?
The peak reflow temperature is 260°C.
- Is the SN74LS145DR RoHS compliant?
Yes, the SN74LS145DR is RoHS compliant.
