74LS145 BCD to Decimal Decoder/Driver IC DIP-16 TTL Logic Chip (74LS145N, Open Collector, 5V, Low Power Schottky)

Description -

The 74LS145 DIP is a TTL logic integrated circuit that converts a 4-bit Binary Coded Decimal (BCD) input into one of ten active LOW decimal outputs. It is housed in a 16-pin Dual Inline Package (DIP) and belongs to the 74LS Low Power Schottky logic family.

The IC features high-voltage open collector outputs with a 15V breakdown voltage, allowing it to directly drive LEDs, indicator lamps, relays, and other higher-voltage loads using external pull-up resistors. When the input represents an invalid BCD code (10 to 15), all outputs remain OFF, providing an automatic blanking function for reliable display and control applications.

Key Features -

• 4-line BCD to 10-line decimal decoder

• Ten active LOW open collector outputs

• High-voltage open collector outputs rated for 15V

• Automatic blanking for invalid BCD input codes

• Low Power Schottky technology

• TTL compatible logic levels

• High-speed switching performance

• Standard DIP-16 package

Specifications -

• Product type - TTL Logic IC

• IC Model - 74LS145

• Logic Function - BCD to Decimal Decoder/Driver

• Package type - DIP-16

• Logic family - 74LS TTL

• Operating voltage - 4.75V to 5.25V DC

• Input type - 4-bit BCD

• Outputs - 10 Active LOW Open Collector Outputs

• Output breakdown voltage - 15V

• Low-level output current - 80mA

• Typical power dissipation - 35mW

• Input high voltage - 2.0V Minimum

• Operating temperature - 0C to 70C

Applications -

• BCD to decimal decoding

• LED and indicator driving

• Numerical display systems

• Relay driver circuits

• Industrial control systems

• Digital counters

• Embedded systems

• Educational electronics projects